DUKE ENERGY CORP, 10-Q filed on 5/6/2025
Quarterly Report
v3.25.1
Cover Page - shares
 3 Months Ended
Mar. 31, 2025
Apr. 30, 2025
Entity Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2025  
Document Transition Report false  
Entity File Number 1-32853  
Entity Registrant Name DUKE ENERGY CORPORATION  
Entity Tax Identification Number 20-2777218  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 525 South Tryon Street  
Entity Address, City or Town Charlotte  
Entity Address, State or Province NC  
Entity Address, Postal Zip Code 28202  
City Area Code 800  
Local Phone Number 488-3853  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   777,257,107
Entity Central Index Key 0001326160  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Duke Energy Carolinas    
Entity Information [Line Items]    
Entity File Number 1-4928  
Entity Registrant Name DUKE ENERGY CAROLINAS, LLC  
Entity Tax Identification Number 56-0205520  
Entity Incorporation, State or Country Code NC  
Entity Address, Address Line One 525 South Tryon Street  
Entity Address, City or Town Charlotte  
Entity Address, State or Province NC  
Entity Address, Postal Zip Code 28202  
City Area Code 800  
Local Phone Number 488-3853  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Central Index Key 0000030371  
Current Fiscal Year End Date --12-31  
Progress Energy    
Entity Information [Line Items]    
Entity File Number 1-15929  
Entity Registrant Name PROGRESS ENERGY, INC.  
Entity Tax Identification Number 56-2155481  
Entity Incorporation, State or Country Code NC  
Entity Address, Address Line One 411 Fayetteville Street  
Entity Address, City or Town Raleigh  
Entity Address, State or Province NC  
Entity Address, Postal Zip Code 27601  
City Area Code 800  
Local Phone Number 488-3853  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   100
Entity Central Index Key 0001094093  
Current Fiscal Year End Date --12-31  
Duke Energy Progress    
Entity Information [Line Items]    
Entity File Number 1-3382  
Entity Registrant Name DUKE ENERGY PROGRESS, LLC  
Entity Tax Identification Number 56-0165465  
Entity Incorporation, State or Country Code NC  
Entity Address, Address Line One 411 Fayetteville Street  
Entity Address, City or Town Raleigh  
Entity Address, State or Province NC  
Entity Address, Postal Zip Code 27601  
City Area Code 800  
Local Phone Number 488-3853  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Central Index Key 0000017797  
Current Fiscal Year End Date --12-31  
Duke Energy Florida    
Entity Information [Line Items]    
Entity File Number 1-3274  
Entity Registrant Name DUKE ENERGY FLORIDA, LLC  
Entity Tax Identification Number 59-0247770  
Entity Incorporation, State or Country Code FL  
Entity Address, Address Line One 299 First Avenue North  
Entity Address, City or Town St. Petersburg  
Entity Address, State or Province FL  
Entity Address, Postal Zip Code 33701  
City Area Code 800  
Local Phone Number 488-3853  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Central Index Key 0000037637  
Current Fiscal Year End Date --12-31  
Duke Energy Ohio    
Entity Information [Line Items]    
Entity File Number 1-1232  
Entity Registrant Name DUKE ENERGY OHIO, INC.  
Entity Tax Identification Number 31-0240030  
Entity Incorporation, State or Country Code OH  
Entity Address, Address Line One 139 East Fourth Street  
Entity Address, City or Town Cincinnati  
Entity Address, State or Province OH  
Entity Address, Postal Zip Code 45202  
City Area Code 800  
Local Phone Number 488-3853  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   89,663,086
Entity Central Index Key 0000020290  
Current Fiscal Year End Date --12-31  
Duke Energy Indiana    
Entity Information [Line Items]    
Entity File Number 1-3543  
Entity Registrant Name DUKE ENERGY INDIANA, LLC  
Entity Tax Identification Number 35-0594457  
Entity Incorporation, State or Country Code IN  
Entity Address, Address Line One 1000 East Main Street  
Entity Address, City or Town Plainfield  
Entity Address, State or Province IN  
Entity Address, Postal Zip Code 46168  
City Area Code 800  
Local Phone Number 488-3853  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Central Index Key 0000081020  
Current Fiscal Year End Date --12-31  
Piedmont    
Entity Information [Line Items]    
Entity File Number 1-6196  
Entity Registrant Name PIEDMONT NATURAL GAS COMPANY, INC.  
Entity Tax Identification Number 56-0556998  
Entity Incorporation, State or Country Code NC  
Entity Address, Address Line One 525 South Tryon Street  
Entity Address, City or Town Charlotte  
Entity Address, State or Province NC  
Entity Address, Postal Zip Code 28202  
City Area Code 800  
Local Phone Number 488-3853  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   100
Entity Central Index Key 0000078460  
Current Fiscal Year End Date --12-31  
Common Stock    
Entity Information [Line Items]    
Title of 12(b) Security Common Stock, $0.001 par value  
Trading Symbol DUK  
Security Exchange Name NYSE  
Junior Subordinated Debentures 5.625% Coupon Due September 2078    
Entity Information [Line Items]    
Title of 12(b) Security 5.625% Junior Subordinated Debentures  
Trading Symbol DUKB  
Security Exchange Name NYSE  
Depositary Share    
Entity Information [Line Items]    
Title of 12(b) Security Depositary Shares  
Trading Symbol DUK PR A  
Security Exchange Name NYSE  
Senior Notes 3.10% Due 2028    
Entity Information [Line Items]    
Title of 12(b) Security 3.10% Senior Notes  
Trading Symbol DUK 28A  
Security Exchange Name NYSE  
Senior Notes 3.85% Due 2034    
Entity Information [Line Items]    
Title of 12(b) Security 3.85% Senior Notes  
Trading Symbol DUK 34  
Security Exchange Name NYSE  
Senior Notes 3.75% Due 2031    
Entity Information [Line Items]    
Title of 12(b) Security 3.75% Senior Notes  
Trading Symbol DUK 31A  
Security Exchange Name NYSE  
v3.25.1
Condensed Consolidated Statements of Operations - USD ($)
shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Operating Revenues    
Regulated electric $ 7,064 $ 6,732
Regulated natural gas 1,105 866
Nonregulated electric and other 80 73
Total operating revenues 8,249 7,671
Operating Expenses    
Operation, maintenance and other 1,499 1,380
Depreciation and amortization 1,512 1,387
Property and other taxes 428 386
Total operating expenses 5,912 5,720
Gain (Loss) on Sales of Other Assets and Other, net 6 12
Operating Income 2,343 1,963
Other Income and Expenses    
Equity in earnings of unconsolidated affiliates 11 17
Other income and expenses, net 132 169
Total other income and expenses 143 186
Interest Expense 889 817
Income From Continuing Operations Before Income Taxes 1,597 1,332
Income Tax Expense From Continuing Operations 193 178
Income From Continuing Operations 1,404 1,154
Loss From Discontinued Operations, net of tax 0 (3)
Net Income 1,404 1,151
Less: Net Income Attributable to Noncontrolling Interests 25 13
Net Income Attributable to Duke Energy Corporation 1,379 1,138
Less: Preferred Dividends 14 39
Net Income Available to Duke Energy Corporation Common Stockholders $ 1,365 $ 1,099
Net income available to Duke Energy Corporation common stockholders    
Basic (in usd per share) $ 1.76 $ 1.44
Diluted (in usd per share) $ 1.76 $ 1.44
Weighted Average Shares Outstanding    
Basic (in shares) 777 771
Diluted (in shares) 777 771
Fuel used in electric generation and purchased power    
Operating Expenses    
Cost of sales $ 2,099 $ 2,335
Cost of natural gas    
Operating Expenses    
Cost of sales $ 374 $ 232
v3.25.1
Condensed Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]    
Net income $ 1,404 $ 1,151
Other Comprehensive Income (Loss), net of tax    
Pension and OPEB adjustments [1] 0 16
Net unrealized (losses) gains on cash flow hedges [1] (10) 91
Reclassification into earnings from cash flow hedges [1] 14 2
Net unrealized (losses) gains on fair value hedges [1] (41) 8
Unrealized gains (losses) on available-for-sale securities [1] 3 (2)
Other Comprehensive (Loss) Income, net of tax [1] (34) 115
Comprehensive Income 1,370 1,266
Less: Comprehensive Income Attributable to Noncontrolling Interests 25 13
Comprehensive Income Attributable to Duke Energy 1,345 1,253
Less: Preferred Dividends 14 39
Comprehensive Income Available to Duke Energy Corporation Common Stockholders $ 1,331 $ 1,214
[1] Net of income tax benefit of $10 million and income tax expense of $34 million for the three months ended March 31, 2025, and 2024, respectively.
v3.25.1
Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Statement of Comprehensive Income [Abstract]    
Other comprehensive income, tax expense (benefit) $ (10) $ 34
v3.25.1
Condensed Consolidated Balance Sheets - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Current Assets    
Cash and cash equivalents $ 475 $ 314
Receivables (net of allowance for doubtful accounts) 3,996 2,232
Receivables of VIEs (net of allowance for doubtful accounts) 10 1,889
Receivable from sales of Commercial Renewables Disposal Groups 558 551
Inventory 4,418 4,509
Regulatory assets 2,538 2,756
Assets held for sale 0 4
Other (includes amounts related to VIEs) 780 695
Total current assets 12,775 12,950
Property, Plant and Equipment    
Cost 183,546 180,806
Accumulated depreciation and amortization (58,672) (57,503)
Net property, plant and equipment 124,874 123,303
Other Noncurrent Assets    
Goodwill 19,303 19,303
Regulatory assets 14,200 14,254
Nuclear decommissioning trust funds 11,246 11,434
Operating lease right-of-use assets, net 1,219 1,148
Investments in equity method unconsolidated affiliates 357 353
Assets held for sale 0 89
Other 3,502 3,509
Total other noncurrent assets 49,827 50,090
Total Assets 187,476 186,343
Current Liabilities    
Accounts payable 4,442 5,479
Notes payable and commercial paper 2,568 3,584
Taxes accrued 794 851
Interest accrued 821 855
Current maturities of long-term debt 4,180 4,349
Asset retirement obligations 643 650
Regulatory liabilities 1,298 1,425
Liabilities associated with assets held for sale 18 80
Other 1,861 2,084
Total current liabilities 16,625 19,357
Long-Term Debt (includes amounts related to VIEs) 79,700 76,340
Other Noncurrent Liabilities    
Deferred income taxes 11,609 11,424
Asset retirement obligations 9,350 9,342
Regulatory liabilities 14,466 14,694
Operating lease liabilities 1,033 957
Accrued pension and other post-retirement benefit costs 426 434
Investment tax credits 888 894
Liabilities associated with assets held for sale 0 89
Other (includes $15 at 2024 related to VIEs) 1,585 1,556
Total other noncurrent liabilities 39,357 39,390
Commitments and Contingencies
Equity    
Common stock 1 1
Additional paid-in capital 45,516 45,494
Retained earnings 3,986 3,431
Accumulated other comprehensive income 194 228
Total Duke Energy Corporation stockholders' equity 50,670 50,127
Noncontrolling interests 1,124 1,129
Total equity 51,794 51,256
Total Liabilities and Equity 187,476 186,343
Variable Interest Entity    
Current Assets    
Inventory 509 494
Regulatory assets 120 120
Other (includes amounts related to VIEs) 57 90
Other Noncurrent Assets    
Regulatory assets 1,674 1,705
Current Liabilities    
Accounts payable 207 214
Current maturities of long-term debt 110 1,012
Long-Term Debt (includes amounts related to VIEs) 1,783 1,842
Other Noncurrent Liabilities    
Other (includes $15 at 2024 related to VIEs)   27
Preferred stock, Series A    
Equity    
Preferred stock $ 973 $ 973
v3.25.1
Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Allowance for doubtful accounts - receivables $ 204 $ 124
Inventory 4,418 4,509
Regulatory assets 2,538 2,756
Current Assets: Other 780 695
Regulatory assets 14,200 14,254
Accounts payable 4,442 5,479
Current maturities of long-term debt 4,180 4,349
Long-Term Debt 79,700 76,340
Other $ 1,585 $ 1,556
Common stock, par value (in usd per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 2,000,000,000 2,000,000,000
Common stock, shares outstanding (in shares) 777,000,000 776,000,000
Preferred stock, Series A    
Preferred stock, par value (in usd per share) $ 0.001 $ 0.001
Preferred stock, depositary shares authorized (in shares) 40,000,000 40,000,000
Preferred stock, depositary shares outstanding (in shares) 40,000,000 40,000,000
Variable Interest Entity    
Allowance for doubtful accounts of VIEs - receivables   $ 85
Inventory $ 509 494
Regulatory assets 120 120
Current Assets: Other 57 90
Regulatory assets 1,674 1,705
Accounts payable 207 214
Current maturities of long-term debt 110 1,012
Long-Term Debt $ 1,783 1,842
Other   $ 27
v3.25.1
Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 1,404 $ 1,151
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization and accretion (including amortization of nuclear fuel) 1,691 1,534
Equity component of AFUDC (70) (55)
Losses (Gains) on sales of Commercial Renewables Disposal Groups 4 (10)
Gains on sales of other assets (6) (12)
Deferred income taxes 192 149
Equity in earnings of unconsolidated affiliates (11) (17)
Payments for asset retirement obligations (102) (115)
(Increase) decrease in    
Net realized and unrealized mark-to-market and hedging transactions 85 (33)
Receivables 150 226
Inventory 99 11
Other current assets 107 329
Increase (decrease) in    
Accounts payable (866) (553)
Taxes accrued (52) (110)
Other current liabilities (468) (211)
Other assets (64) 42
Other liabilities 84 148
Net cash provided by operating activities 2,177 2,474
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (3,148) (3,208)
Contributions to equity method investments 0 (7)
Purchases of debt and equity securities (1,966) (946)
Proceeds from sales and maturities of debt and equity securities 2,051 985
Other 237 166
Net cash used in investing activities (3,300) (3,342)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the issuance of long-term debt 4,096 3,481
Issuance of common stock 7 4
Payments for the redemption of long-term debt (996) (1,392)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days 0 294
Payments for the redemption of short-term debt with original maturities greater than 90 days (5) (535)
Notes payable and commercial paper (1,050) 50
Dividends paid (803) (806)
Other (11) (67)
Net cash provided by financing activities 1,238 1,029
Net increase in cash, cash equivalents and restricted cash 115 161
Cash, cash equivalents and restricted cash at beginning of period 421 357
Cash, cash equivalents and restricted cash at end of period 536 518
Significant non-cash transactions:    
Accrued capital expenditures $ 1,900 $ 1,615
v3.25.1
Condensed Consolidated Statements of Changes in Equity - USD ($)
shares in Millions, $ in Millions
Total
Total Equity
Preferred Stock
Common Stock
Additional Paid-in Capital
Retained Earnings
Net Gains (Losses) on Hedges
 [1]
Net Unrealized Gains (Losses) on Available-for-Sale Securities
Pension and OPEB Adjustments
Noncontrolling Interests
Common Stock
Common Stock
Total Equity
Common Stock
Additional Paid-in Capital
Beginning Balance (in shares) at Dec. 31, 2023       771                  
Beginning Balance (Parent) at Dec. 31, 2023 $ 50,187 $ 49,112 $ 1,962 $ 1 $ 44,920 $ 2,235 $ 98 $ (15) $ (89) $ 1,075      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Net income (loss) [2] 1,112 1,099       1,099       13      
Other comprehensive income (loss) 115 [3] 115         101 (2) 16        
Common stock issuances, including dividend reinvestment and employee benefits (in shares)       1                  
Common stock issuances, including dividend reinvestment and employee benefits                     $ 16 $ 16 $ 16
Common stock dividends (792) (792)       (792)              
Other 0 1     1 0       (1)      
Beginning Balance (in shares) at Mar. 31, 2024       772                  
Ending Balance (Parent) at Mar. 31, 2024 $ 50,638 49,551 1,962 $ 1 44,937 2,542 199 (17) (73) 1,087      
Beginning Balance (in shares) at Dec. 31, 2024 776     776                  
Beginning Balance (Parent) at Dec. 31, 2024 $ 51,256 50,127 973 $ 1 45,494 3,431 326 (17) (81) 1,129      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Net income (loss) [2] 1,390 1,365       1,365       25      
Other comprehensive income (loss) (34) [3] (34)         (37) 3          
Common stock issuances, including dividend reinvestment and employee benefits (in shares)       1                  
Common stock issuances, including dividend reinvestment and employee benefits 22 22     22                
Common stock dividends (814) (814)       (814)              
Sale of Commercial Renewables Disposal Groups [4] (18)                 (18)      
Distributions to noncontrolling interest in subsidiaries (6)                 (6)      
Other $ (2) 4       4       (6)      
Beginning Balance (in shares) at Mar. 31, 2025 777     777                  
Ending Balance (Parent) at Mar. 31, 2025 $ 51,794 $ 50,670 $ 973 $ 1 $ 45,516 $ 3,986 $ 289 $ (14) $ (81) $ 1,124      
[1] See Duke Energy Condensed Consolidated Statements of Comprehensive Income for detailed activity related to Cash Flow and Fair Value hedges.
[2] Net income available to Duke Energy Corporation Common Stockholders reflects preferred dividends.
[3] Net of income tax benefit of $10 million and income tax expense of $34 million for the three months ended March 31, 2025, and 2024, respectively.
[4] See Note 2 for additional information.
v3.25.1
Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Carolinas - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Operating Revenues $ 8,249 $ 7,671
Operating Expenses    
Operation, maintenance and other 1,499 1,380
Depreciation and amortization 1,512 1,387
Property and other taxes 428 386
Total operating expenses 5,912 5,720
Gain (Loss) on Sales of Other Assets and Other, net 6 12
Operating Income 2,343 1,963
Other Income and Expenses, net 143 186
Interest Expense 889 817
Income From Continuing Operations Before Income Taxes 1,597 1,332
Income Tax Expense From Continuing Operations 193 178
Comprehensive Income Attributable to Duke Energy 1,345 1,253
Net Income Attributable to Duke Energy Corporation 1,379 1,138
Duke Energy Carolinas    
Operating Revenues 2,524 2,407
Operating Expenses    
Cost of sales 803 860
Operation, maintenance and other 484 452
Depreciation and amortization 432 397
Property and other taxes 102 94
Total operating expenses 1,821 1,803
Gain (Loss) on Sales of Other Assets and Other, net 0 1
Operating Income 703 605
Other Income and Expenses, net 61 61
Interest Expense 200 180
Income From Continuing Operations Before Income Taxes 564 486
Income Tax Expense From Continuing Operations 51 56
Comprehensive Income Attributable to Duke Energy 513 430
Net Income Attributable to Duke Energy Corporation $ 513 $ 430
v3.25.1
Condensed Consolidated Balance Sheets - Duke Energy Carolinas - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Current Assets    
Cash and cash equivalents $ 475 $ 314
Receivables (net of allowance for doubtful accounts) 3,996 2,232
Receivables of VIEs (net of allowance for doubtful accounts) 10 1,889
Inventory 4,418 4,509
Regulatory assets 2,538 2,756
Other (includes amounts related to VIEs) 780 695
Total current assets 12,775 12,950
Property, Plant and Equipment    
Cost 183,546 180,806
Accumulated depreciation and amortization (58,672) (57,503)
Net property, plant and equipment 124,874 123,303
Other Noncurrent Assets    
Regulatory assets 14,200 14,254
Nuclear decommissioning trust funds 11,246 11,434
Operating lease right-of-use assets, net 1,219 1,148
Other 3,502 3,509
Total other noncurrent assets 49,827 50,090
Total Assets 187,476 186,343
Current Liabilities    
Accounts payable 4,442 5,479
Taxes accrued 794 851
Interest accrued 821 855
Current maturities of long-term debt 4,180 4,349
Asset retirement obligations 643 650
Regulatory liabilities 1,298 1,425
Other 1,861 2,084
Total current liabilities 16,625 19,357
Long-Term Debt (includes amounts related to VIEs) 79,700 76,340
Other Noncurrent Liabilities    
Deferred income taxes 11,609 11,424
Asset retirement obligations 9,350 9,342
Regulatory liabilities 14,466 14,694
Operating lease liabilities 1,033 957
Accrued pension and other post-retirement benefit costs 426 434
Investment tax credits 888 894
Other 1,585 1,556
Total other noncurrent liabilities 39,357 39,390
Commitments and Contingencies
Equity    
Accumulated other comprehensive income 194 228
Total Liabilities and Equity 187,476 186,343
Duke Energy Carolinas    
Current Assets    
Cash and cash equivalents 46 6
Receivables (net of allowance for doubtful accounts) 1,168 266
Receivables of VIEs (net of allowance for doubtful accounts) 1 1,054
Inventory 1,488 1,536
Regulatory assets 613 685
Other (includes amounts related to VIEs) 169 52
Total current assets 3,822 3,821
Property, Plant and Equipment    
Cost 59,212 58,382
Accumulated depreciation and amortization (19,382) (19,090)
Net property, plant and equipment 39,830 39,292
Other Noncurrent Assets    
Regulatory assets 4,149 4,199
Nuclear decommissioning trust funds 6,377 6,468
Operating lease right-of-use assets, net 93 98
Other 1,141 1,127
Total other noncurrent assets 11,760 11,892
Total Assets 55,412 55,005
Current Liabilities    
Accounts payable 1,378 1,809
Taxes accrued 165 627
Interest accrued 173 201
Current maturities of long-term debt 23 521
Asset retirement obligations 253 247
Regulatory liabilities 600 618
Other 485 541
Total current liabilities 3,561 4,805
Long-Term Debt (includes amounts related to VIEs) 17,911 16,669
Other Noncurrent Liabilities    
Deferred income taxes 4,013 4,052
Asset retirement obligations 3,736 3,743
Regulatory liabilities 6,489 6,592
Operating lease liabilities 83 87
Accrued pension and other post-retirement benefit costs 23 24
Investment tax credits 313 317
Other 630 576
Total other noncurrent liabilities 15,287 15,391
Commitments and Contingencies
Equity    
Member's equity 18,359 17,846
Accumulated other comprehensive income (6) (6)
Total equity 18,353 17,840
Total Liabilities and Equity 55,412 55,005
Duke Energy Carolinas | Affiliated Entity    
Current Assets    
Receivables (net of allowance for doubtful accounts) 197 157
Current Liabilities    
Accounts payable 484 241
Long-Term Debt (includes amounts related to VIEs) 300 300
Duke Energy Carolinas | Affiliated Entity | Notes Receivable    
Current Assets    
Receivables (net of allowance for doubtful accounts) $ 140 $ 65
v3.25.1
Condensed Consolidated Balance Sheets - Duke Energy Carolinas (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Allowance for doubtful accounts - receivables $ 204 $ 124
Regulatory assets 2,538 2,756
Current Assets: Other 780 695
Regulatory assets 14,200 14,254
Current maturities of long-term debt 4,180 4,349
Long-Term Debt 79,700 76,340
Other 1,585 1,556
Variable Interest Entity    
Allowance for doubtful accounts of VIEs - receivables   85
Regulatory assets 120 120
Current Assets: Other 57 90
Regulatory assets 1,674 1,705
Current maturities of long-term debt 110 1,012
Long-Term Debt 1,783 1,842
Other   27
Duke Energy Carolinas    
Allowance for doubtful accounts - receivables 64 18
Allowance for doubtful accounts of VIEs - receivables   51
Regulatory assets 613 685
Current Assets: Other 169 52
Regulatory assets 4,149 4,199
Current maturities of long-term debt 23 521
Long-Term Debt 17,911 16,669
Other 630 576
Duke Energy Carolinas | Variable Interest Entity    
Regulatory assets 12 12
Current Assets: Other 14 9
Regulatory assets 186 189
Current maturities of long-term debt 10 510
Long-Term Debt $ 193 198
Other   $ 15
v3.25.1
Condensed Consolidated Statements of Cash Flows - Duke Energy Carolinas - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 1,404 $ 1,151
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization and accretion (including amortization of nuclear fuel) 1,691 1,534
Equity component of AFUDC (70) (55)
Deferred income taxes 192 149
Payments for asset retirement obligations (102) (115)
(Increase) decrease in    
Receivables 150 226
Inventory 99 11
Other current assets 107 329
Increase (decrease) in    
Accounts payable (866) (553)
Taxes accrued (52) (110)
Other current liabilities (468) (211)
Other assets (64) 42
Other liabilities 84 148
Net cash provided by operating activities 2,177 2,474
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (3,148) (3,208)
Purchases of debt and equity securities (1,966) (946)
Proceeds from sales and maturities of debt and equity securities 2,051 985
Other (237) (166)
Net cash used in investing activities (3,300) (3,342)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the issuance of long-term debt 4,096 3,481
Payments for the redemption of long-term debt (996) (1,392)
Other (11) (67)
Net cash provided by financing activities 1,238 1,029
Net increase in cash, cash equivalents and restricted cash 115 161
Cash, cash equivalents and restricted cash at beginning of period 421 357
Cash, cash equivalents and restricted cash at end of period 536 518
Significant non-cash transactions:    
Accrued capital expenditures 1,900 1,615
Duke Energy Carolinas    
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income 513 430
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization and accretion (including amortization of nuclear fuel) 500 463
Equity component of AFUDC (32) (28)
Deferred income taxes 13 14
Payments for asset retirement obligations (43) (36)
(Increase) decrease in    
Receivables 158 14
Receivables from affiliated companies (40) 30
Inventory 48 7
Other current assets (63) (23)
Increase (decrease) in    
Accounts payable (344) (203)
Accounts payable to affiliated companies 243 35
Taxes accrued (461) (133)
Other current liabilities (111) (137)
Other assets (16) 192
Other liabilities 24 (20)
Net cash provided by operating activities 389 605
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (1,019) (952)
Purchases of debt and equity securities (1,065) (535)
Proceeds from sales and maturities of debt and equity securities 1,065 535
Notes receivable from affiliated companies (75) 0
Other (49) (51)
Net cash used in investing activities (1,143) (1,003)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the issuance of long-term debt 1,239 1,011
Payments for the redemption of long-term debt (508) (7)
Notes payable to affiliated companies 0 (612)
Other 60 (1)
Net cash provided by financing activities 791 391
Net increase in cash, cash equivalents and restricted cash 37 (7)
Cash, cash equivalents and restricted cash at beginning of period 16 19
Cash, cash equivalents and restricted cash at end of period 53 12
Significant non-cash transactions:    
Accrued capital expenditures $ 782 $ 550
v3.25.1
Condensed Consolidated Statements of Changes in Equity - Duke Energy Carolinas - USD ($)
$ in Millions
Total
Duke Energy Carolinas
Duke Energy Carolinas
Member's Equity
Duke Energy Carolinas
Net Losses on Cash Flow Hedges
Beginning Balance (Parent) at Dec. 31, 2023 $ 50,187 $ 16,907 $ 16,913 $ (6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income (loss) 1,138 430 430  
Ending Balance (Parent) at Mar. 31, 2024 50,638 17,337 17,343 (6)
Beginning Balance (Parent) at Dec. 31, 2024 51,256 17,840 17,846 (6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income (loss) 1,379 513 513  
Ending Balance (Parent) at Mar. 31, 2025 $ 51,794 $ 18,353 $ 18,359 $ (6)
v3.25.1
Condensed Consolidated Statements of Operations and Comprehensive Income - Progress Energy - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Operating Revenues $ 8,249 $ 7,671
Operating Expenses    
Operation, maintenance and other 1,499 1,380
Depreciation and amortization 1,512 1,387
Property and other taxes 428 386
Total operating expenses 5,912 5,720
Gain (Loss) on Sales of Other Assets and Other, net 6 12
Operating Income 2,343 1,963
Other Income and Expenses, net 143 186
Interest Expense 889 817
Income From Continuing Operations Before Income Taxes 1,597 1,332
Income Tax Expense From Continuing Operations 193 178
Net Income Attributable to Duke Energy Corporation 1,379 1,138
Comprehensive Income 1,370 1,266
Progress Energy    
Operating Revenues 3,467 3,228
Operating Expenses    
Cost of sales 1,106 1,143
Operation, maintenance and other 688 628
Depreciation and amortization 631 587
Property and other taxes 172 158
Total operating expenses 2,597 2,516
Gain (Loss) on Sales of Other Assets and Other, net 6 7
Operating Income 876 719
Other Income and Expenses, net 55 62
Interest Expense 275 260
Income From Continuing Operations Before Income Taxes 656 521
Income Tax Expense From Continuing Operations 110 86
Net Income Attributable to Duke Energy Corporation 546 435
Comprehensive Income $ 546 $ 435
v3.25.1
Condensed Consolidated Balance Sheets - Progress Energy - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Current Assets    
Cash and cash equivalents $ 475 $ 314
Receivables (net of allowance for doubtful accounts) 3,996 2,232
Receivables of VIEs (net of allowance for doubtful accounts) 10 1,889
Inventory 4,418 4,509
Regulatory assets 2,538 2,756
Other (includes amounts related to VIEs) 780 695
Total current assets 12,775 12,950
Property, Plant and Equipment    
Cost 183,546 180,806
Accumulated depreciation and amortization (58,672) (57,503)
Net property, plant and equipment 124,874 123,303
Other Noncurrent Assets    
Goodwill 19,303 19,303
Regulatory assets 14,200 14,254
Nuclear decommissioning trust funds 11,246 11,434
Operating lease right-of-use assets, net 1,219 1,148
Other 3,502 3,509
Total other noncurrent assets 49,827 50,090
Total Assets 187,476 186,343
Current Liabilities    
Accounts payable 4,442 5,479
Taxes accrued 794 851
Interest accrued 821 855
Current maturities of long-term debt 4,180 4,349
Asset retirement obligations 643 650
Regulatory liabilities 1,298 1,425
Other 1,861 2,084
Total current liabilities 16,625 19,357
Long-Term Debt (includes amounts related to VIEs) 79,700 76,340
Other Noncurrent Liabilities    
Deferred income taxes 11,609 11,424
Asset retirement obligations 9,350 9,342
Regulatory liabilities 14,466 14,694
Operating lease liabilities 1,033 957
Accrued pension and other post-retirement benefit costs 426 434
Investment tax credits 888 894
Other 1,585 1,556
Total other noncurrent liabilities 39,357 39,390
Commitments and Contingencies
Equity    
Common stock 1 1
Additional paid-in capital 45,516 45,494
Retained earnings 3,986 3,431
Accumulated other comprehensive income 194 228
Total Duke Energy Corporation stockholders' equity 50,670 50,127
Total Liabilities and Equity 187,476 186,343
Variable Interest Entity    
Current Assets    
Inventory 509 494
Regulatory assets 120 120
Other (includes amounts related to VIEs) 57 90
Other Noncurrent Assets    
Regulatory assets 1,674 1,705
Current Liabilities    
Accounts payable 207 214
Current maturities of long-term debt 110 1,012
Long-Term Debt (includes amounts related to VIEs) 1,783 1,842
Other Noncurrent Liabilities    
Other   27
Progress Energy    
Current Assets    
Cash and cash equivalents 87 73
Receivables (net of allowance for doubtful accounts) 1,455 707
Receivables of VIEs (net of allowance for doubtful accounts) 8 835
Inventory 2,107 2,086
Regulatory assets 1,537 1,647
Other (includes amounts related to VIEs) 207 182
Total current assets 6,551 5,555
Property, Plant and Equipment    
Cost 73,776 72,560
Accumulated depreciation and amortization (24,105) (23,586)
Net property, plant and equipment 49,671 48,974
Other Noncurrent Assets    
Goodwill 3,655 3,655
Regulatory assets 6,641 6,618
Nuclear decommissioning trust funds 4,869 4,967
Operating lease right-of-use assets, net 678 625
Other 1,280 1,242
Total other noncurrent assets 17,123 17,107
Total Assets 73,345 71,636
Current Liabilities    
Accounts payable 1,693 2,170
Taxes accrued 228 312
Interest accrued 254 232
Current maturities of long-term debt 1,816 1,517
Asset retirement obligations 227 231
Regulatory liabilities 433 522
Other 719 792
Total current liabilities 6,060 7,360
Long-Term Debt (includes amounts related to VIEs) 24,917 22,829
Other Noncurrent Liabilities    
Deferred income taxes 5,353 5,263
Asset retirement obligations 4,328 4,317
Regulatory liabilities 5,188 5,258
Operating lease liabilities 621 557
Accrued pension and other post-retirement benefit costs 251 254
Investment tax credits 384 385
Other 343 357
Total other noncurrent liabilities 16,468 16,391
Commitments and Contingencies
Equity    
Common stock 0 0
Additional paid-in capital 12,130 11,830
Retained earnings 13,630 13,086
Accumulated other comprehensive income (10) (10)
Total Duke Energy Corporation stockholders' equity 25,750 24,906
Total Liabilities and Equity 73,345 71,636
Progress Energy | Variable Interest Entity    
Current Assets    
Inventory 509 494
Regulatory assets 108 108
Other (includes amounts related to VIEs) 36 75
Other Noncurrent Assets    
Regulatory assets 1,488 1,516
Current Liabilities    
Accounts payable 201 208
Current maturities of long-term debt 100 502
Long-Term Debt (includes amounts related to VIEs) 1,530 1,582
Other Noncurrent Liabilities    
Other   11
Progress Energy | Affiliated Entity    
Current Assets    
Receivables (net of allowance for doubtful accounts) 97 25
Current Liabilities    
Accounts payable 690 507
Notes payable to affiliated companies 0 1,077
Long-Term Debt (includes amounts related to VIEs) 150 150
Progress Energy | Affiliated Entity | Notes Receivable    
Current Assets    
Receivables (net of allowance for doubtful accounts) $ 1,053 $ 0
v3.25.1
Condensed Consolidated Balance Sheets - Progress Energy (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Allowance for doubtful accounts - receivables $ 204 $ 124
Inventory 4,418 4,509
Regulatory assets 2,538 2,756
Current Assets: Other 780 695
Regulatory assets 14,200 14,254
Accounts payable 4,442 5,479
Current maturities of long-term debt 4,180 4,349
Long-Term Debt 79,700 76,340
Other $ 1,585 $ 1,556
Common stock, par value (in usd per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 2,000,000,000 2,000,000,000
Common stock, shares outstanding (in shares) 777,000,000 776,000,000
Variable Interest Entity    
Allowance for doubtful accounts of VIEs - receivables   $ 85
Inventory $ 509 494
Regulatory assets 120 120
Current Assets: Other 57 90
Regulatory assets 1,674 1,705
Accounts payable 207 214
Current maturities of long-term debt 110 1,012
Long-Term Debt 1,783 1,842
Other   27
Progress Energy    
Allowance for doubtful accounts - receivables 67 39
Inventory 2,107 2,086
Regulatory assets 1,537 1,647
Current Assets: Other 207 182
Regulatory assets 6,641 6,618
Accounts payable 1,693 2,170
Current maturities of long-term debt 1,816 1,517
Long-Term Debt 24,917 22,829
Other $ 343 $ 357
Common stock, par value (in usd per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 100 100
Common stock, shares outstanding (in shares) 100 100
Progress Energy | Variable Interest Entity    
Allowance for doubtful accounts of VIEs - receivables   $ 34
Inventory $ 509 494
Regulatory assets 108 108
Current Assets: Other 36 75
Regulatory assets 1,488 1,516
Accounts payable 201 208
Current maturities of long-term debt 100 502
Long-Term Debt $ 1,530 1,582
Other   $ 11
v3.25.1
Condensed Consolidated Statements of Cash Flows - Progress Energy - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 1,404 $ 1,151
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization and accretion (including amortization of nuclear fuel) 1,691 1,534
Equity component of AFUDC (70) (55)
Deferred income taxes 192 149
Payments for asset retirement obligations (102) (115)
(Increase) decrease in    
Receivables 150 226
Inventory 99 11
Other current assets 107 329
Increase (decrease) in    
Accounts payable (866) (553)
Taxes accrued (52) (110)
Other current liabilities (468) (211)
Other assets (64) 42
Other liabilities 84 148
Net cash provided by operating activities 2,177 2,474
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (3,148) (3,208)
Purchases of debt and equity securities (1,966) (946)
Proceeds from sales and maturities of debt and equity securities 2,051 985
Other (237) (166)
Net cash used in investing activities (3,300) (3,342)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the issuance of long-term debt 4,096 3,481
Payments for the redemption of long-term debt (996) (1,392)
Other (11) (67)
Net cash provided by financing activities 1,238 1,029
Net increase in cash, cash equivalents and restricted cash 115 161
Cash, cash equivalents and restricted cash at beginning of period 421 357
Cash, cash equivalents and restricted cash at end of period 536 518
Significant non-cash transactions:    
Accrued capital expenditures 1,900 1,615
Progress Energy    
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income 546 435
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization and accretion (including amortization of nuclear fuel) 744 669
Equity component of AFUDC (24) (18)
Deferred income taxes 68 (5)
Payments for asset retirement obligations (40) (68)
(Increase) decrease in    
Receivables 120 103
Receivables from affiliated companies (72) 87
Inventory (12) (86)
Other current assets 70 232
Increase (decrease) in    
Accounts payable (411) (79)
Accounts payable to affiliated companies 183 84
Taxes accrued (76) (57)
Other current liabilities (90) (36)
Other assets (118) (134)
Other liabilities 11 27
Net cash provided by operating activities 899 1,154
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (1,409) (1,373)
Purchases of debt and equity securities (820) (381)
Proceeds from sales and maturities of debt and equity securities 836 424
Notes receivable from affiliated companies (1,053) 0
Other (85) (74)
Net cash used in investing activities (2,531) (1,404)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the issuance of long-term debt 2,857 498
Payments for the redemption of long-term debt (474) (73)
Notes payable to affiliated companies (1,077) (223)
Capital contribution from parent 300 0
Other (2) (1)
Net cash provided by financing activities 1,604 201
Net increase in cash, cash equivalents and restricted cash (28) (49)
Cash, cash equivalents and restricted cash at beginning of period 160 135
Cash, cash equivalents and restricted cash at end of period 132 86
Significant non-cash transactions:    
Accrued capital expenditures $ 748 $ 680
v3.25.1
Condensed Consolidated Statements of Changes in Equity - Progress Energy - USD ($)
$ in Millions
Total
Additional Paid-in Capital
Retained Earnings
Net Unrealized Gains (Losses) on Available-for-Sale Securities
Pension and OPEB Adjustments
Total Equity
Progress Energy
Progress Energy
Additional Paid-in Capital
Progress Energy
Retained Earnings
Progress Energy
Net Gains (Losses) on Cash Flow Hedges
Progress Energy
Net Unrealized Gains (Losses) on Available-for-Sale Securities
Progress Energy
Pension and OPEB Adjustments
Beginning Balance (Parent) at Dec. 31, 2023 $ 50,187 $ 44,920 $ 2,235 $ (15) $ (89) $ 49,112 $ 22,860 $ 11,830 $ 11,040 $ (1) $ (5) $ (4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Net income 1,151           435   435      
Capital contribution from parent             0          
Other 0 1 0     1            
Ending Balance (Parent) at Mar. 31, 2024 50,638 44,937 2,542 (17) (73) 49,551 23,295 11,830 11,475 (1) (5) (4)
Beginning Balance (Parent) at Dec. 31, 2024 51,256 45,494 3,431 (17) (81) 50,127 24,906 11,830 13,086 (1) (5) (4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Net income 1,404           546   546      
Capital contribution from parent             (300) 300        
Other (2)   4     4 (2)   (2)      
Ending Balance (Parent) at Mar. 31, 2025 $ 51,794 $ 45,516 $ 3,986 $ (14) $ (81) $ 50,670 $ 25,750 $ 12,130 $ 13,630 $ (1) $ (5) $ (4)
v3.25.1
Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Progress - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Operating Revenues $ 8,249 $ 7,671
Operating Expenses    
Operation, maintenance and other 1,499 1,380
Depreciation and amortization 1,512 1,387
Property and other taxes 428 386
Total operating expenses 5,912 5,720
Gain (Loss) on Sales of Other Assets and Other, net 6 12
Operating Income 2,343 1,963
Other Income and Expenses, net 143 186
Interest Expense 889 817
Income From Continuing Operations Before Income Taxes 1,597 1,332
Income Tax Expense 193 178
Comprehensive Income Attributable to Duke Energy 1,345 1,253
Net Income Attributable to Duke Energy Corporation 1,379 1,138
Duke Energy Progress    
Operating Revenues 2,018 1,788
Operating Expenses    
Cost of sales 725 620
Operation, maintenance and other 398 375
Depreciation and amortization 357 339
Property and other taxes 60 51
Total operating expenses 1,540 1,385
Gain (Loss) on Sales of Other Assets and Other, net 0 1
Operating Income 478 404
Other Income and Expenses, net 37 36
Interest Expense 128 120
Income From Continuing Operations Before Income Taxes 387 320
Income Tax Expense 56 48
Comprehensive Income Attributable to Duke Energy 331 272
Net Income Attributable to Duke Energy Corporation $ 331 $ 272
v3.25.1
Condensed Consolidated Balance Sheets - Duke Energy Progress - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Current Assets    
Cash and cash equivalents $ 475 $ 314
Receivables (net of allowance for doubtful accounts) 3,996 2,232
Receivables of VIEs (net of allowance for doubtful accounts) 10 1,889
Inventory 4,418 4,509
Regulatory assets 2,538 2,756
Other (includes amounts related to VIEs) 780 695
Total current assets 12,775 12,950
Property, Plant and Equipment    
Cost 183,546 180,806
Accumulated depreciation and amortization (58,672) (57,503)
Net property, plant and equipment 124,874 123,303
Other Noncurrent Assets    
Regulatory assets 14,200 14,254
Nuclear decommissioning trust funds 11,246 11,434
Operating lease right-of-use assets, net 1,219 1,148
Other 3,502 3,509
Total other noncurrent assets 49,827 50,090
Total Assets 187,476 186,343
Current Liabilities    
Accounts payable 4,442 5,479
Taxes accrued 794 851
Interest accrued 821 855
Current maturities of long-term debt 4,180 4,349
Asset retirement obligations 643 650
Regulatory liabilities 1,298 1,425
Other 1,861 2,084
Total current liabilities 16,625 19,357
Long-Term Debt (includes amounts related to VIEs) 79,700 76,340
Other Noncurrent Liabilities    
Deferred income taxes 11,609 11,424
Asset retirement obligations 9,350 9,342
Regulatory liabilities 14,466 14,694
Operating lease liabilities 1,033 957
Accrued pension and other post-retirement benefit costs 426 434
Investment tax credits 888 894
Other 1,585 1,556
Total other noncurrent liabilities 39,357 39,390
Commitments and Contingencies
Equity    
Total Liabilities and Equity 187,476 186,343
Variable Interest Entity    
Current Assets    
Inventory 509 494
Regulatory assets 120 120
Other (includes amounts related to VIEs) 57 90
Other Noncurrent Assets    
Regulatory assets 1,674 1,705
Current Liabilities    
Accounts payable 207 214
Current maturities of long-term debt 110 1,012
Long-Term Debt (includes amounts related to VIEs) 1,783 1,842
Other Noncurrent Liabilities    
Other   27
Duke Energy Progress    
Current Assets    
Cash and cash equivalents 53 24
Receivables (net of allowance for doubtful accounts) 906 160
Receivables of VIEs (net of allowance for doubtful accounts) 6 835
Inventory 1,333 1,341
Regulatory assets 616 626
Other (includes amounts related to VIEs) 151 104
Total current assets 4,057 3,100
Property, Plant and Equipment    
Cost 42,769 42,060
Accumulated depreciation and amortization (16,252) (15,930)
Net property, plant and equipment 26,517 26,130
Other Noncurrent Assets    
Regulatory assets 4,573 4,555
Nuclear decommissioning trust funds 4,564 4,636
Operating lease right-of-use assets, net 414 348
Other 752 724
Total other noncurrent assets 10,303 10,263
Total Assets 40,877 39,493
Current Liabilities    
Accounts payable 603 749
Taxes accrued 82 394
Interest accrued 96 122
Current maturities of long-term debt 581 983
Asset retirement obligations 226 230
Regulatory liabilities 313 348
Other 359 427
Total current liabilities 2,696 4,170
Long-Term Debt (includes amounts related to VIEs) 13,489 11,371
Other Noncurrent Liabilities    
Deferred income taxes 2,410 2,344
Asset retirement obligations 4,122 4,104
Regulatory liabilities 4,535 4,570
Operating lease liabilities 409 332
Accrued pension and other post-retirement benefit costs 140 141
Investment tax credits 143 144
Other 182 196
Total other noncurrent liabilities 11,941 11,831
Commitments and Contingencies
Equity    
Total equity 12,601 11,971
Total Liabilities and Equity 40,877 39,493
Duke Energy Progress | Variable Interest Entity    
Current Assets    
Regulatory assets 47 47
Other (includes amounts related to VIEs) 26 40
Other Noncurrent Assets    
Regulatory assets 759 775
Current Liabilities    
Current maturities of long-term debt 40 443
Long-Term Debt (includes amounts related to VIEs) 789 809
Other Noncurrent Liabilities    
Other   11
Duke Energy Progress | Affiliated Entity    
Current Assets    
Receivables (net of allowance for doubtful accounts) 24 10
Current Liabilities    
Accounts payable 436 306
Notes payable to affiliated companies 0 611
Long-Term Debt (includes amounts related to VIEs) 150 150
Duke Energy Progress | Affiliated Entity | Notes Receivable    
Current Assets    
Receivables (net of allowance for doubtful accounts) $ 968 $ 0
v3.25.1
Condensed Consolidated Balance Sheets - Duke Energy Progress (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Allowance for doubtful accounts - receivables $ 204 $ 124
Regulatory assets 2,538 2,756
Current Assets: Other 780 695
Regulatory assets 14,200 14,254
Current maturities of long-term debt 4,180 4,349
Long-Term Debt 79,700 76,340
Other 1,585 1,556
Variable Interest Entity    
Allowance for doubtful accounts of VIEs - receivables   85
Regulatory assets 120 120
Current Assets: Other 57 90
Regulatory assets 1,674 1,705
Current maturities of long-term debt 110 1,012
Long-Term Debt 1,783 1,842
Other   27
Duke Energy Progress    
Allowance for doubtful accounts - receivables 42 10
Regulatory assets 616 626
Current Assets: Other 151 104
Regulatory assets 4,573 4,555
Current maturities of long-term debt 581 983
Long-Term Debt 13,489 11,371
Other 182 196
Duke Energy Progress | Affiliated Entity    
Long-Term Debt 150 150
Duke Energy Progress | Variable Interest Entity    
Allowance for doubtful accounts of VIEs - receivables   34
Regulatory assets 47 47
Current Assets: Other 26 40
Regulatory assets 759 775
Current maturities of long-term debt 40 443
Long-Term Debt $ 789 809
Other   $ 11
v3.25.1
Condensed Consolidated Statements of Cash Flows - Duke Energy Progress - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 1,404 $ 1,151
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization and accretion (including amortization of nuclear fuel) 1,691 1,534
Equity component of AFUDC (70) (55)
Deferred income taxes 192 149
Payments for asset retirement obligations (102) (115)
(Increase) decrease in    
Receivables 150 226
Inventory 99 11
Other current assets 107 329
Increase (decrease) in    
Accounts payable (866) (553)
Taxes accrued (52) (110)
Other current liabilities (468) (211)
Other assets (64) 42
Other liabilities 84 148
Net cash provided by operating activities 2,177 2,474
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (3,148) (3,208)
Purchases of debt and equity securities (1,966) (946)
Proceeds from sales and maturities of debt and equity securities 2,051 985
Other (237) (166)
Net cash used in investing activities (3,300) (3,342)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the issuance of long-term debt 4,096 3,481
Payments for the redemption of long-term debt (996) (1,392)
Other (11) (67)
Net cash provided by financing activities 1,238 1,029
Net increase in cash, cash equivalents and restricted cash 115 161
Cash, cash equivalents and restricted cash at beginning of period 421 357
Cash, cash equivalents and restricted cash at end of period 536 518
Significant non-cash transactions:    
Accrued capital expenditures 1,900 1,615
Duke Energy Progress    
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income 331 272
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization and accretion (including amortization of nuclear fuel) 402 385
Equity component of AFUDC (19) (13)
Deferred income taxes 49 (21)
Payments for asset retirement obligations (32) (46)
(Increase) decrease in    
Receivables 101 50
Receivables from affiliated companies (14) 13
Inventory 8 (67)
Other current assets (36) 97
Increase (decrease) in    
Accounts payable (56) (31)
Accounts payable to affiliated companies 130 (38)
Taxes accrued (311) (47)
Other current liabilities (73) (49)
Other assets (42) (105)
Other liabilities 23 (11)
Net cash provided by operating activities 461 389
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (849) (704)
Purchases of debt and equity securities (767) (351)
Proceeds from sales and maturities of debt and equity securities 767 351
Notes receivable from affiliated companies (968) 0
Other (34) (12)
Net cash used in investing activities (1,851) (716)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the issuance of long-term debt 2,155 495
Payments for the redemption of long-term debt (441) (33)
Notes payable to affiliated companies (611) (137)
Capital contribution from parent 300 0
Other (1) 0
Net cash provided by financing activities 1,402 325
Net increase in cash, cash equivalents and restricted cash 12 (2)
Cash, cash equivalents and restricted cash at beginning of period 69 51
Cash, cash equivalents and restricted cash at end of period 81 49
Significant non-cash transactions:    
Accrued capital expenditures $ 324 $ 259
v3.25.1
Condensed Consolidated Statements of Changes in Equity - Duke Energy Progress - USD ($)
$ in Millions
Total
Duke Energy Progress
Duke Energy Progress
Member's Equity
Beginning Balance (Parent) at Dec. 31, 2023 $ 50,187   $ 10,807
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Net income (loss) 1,138 $ 272 272
Capital contribution from parent   0  
Other 0    
Ending Balance (Parent) at Mar. 31, 2024 50,638   11,079
Beginning Balance (Parent) at Dec. 31, 2024 51,256   11,971
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Net income (loss) 1,379 331 331
Capital contribution from parent   $ 300 300
Other (2)   (1)
Ending Balance (Parent) at Mar. 31, 2025 $ 51,794   $ 12,601
v3.25.1
Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Florida - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Operating Revenues $ 8,249 $ 7,671
Operating Expenses    
Operation, maintenance and other 1,499 1,380
Depreciation and amortization 1,512 1,387
Property and other taxes 428 386
Total operating expenses 5,912 5,720
Gain (Loss) on Sales of Other Assets and Other, net 6 12
Operating Income 2,343 1,963
Other Income and Expenses, net 143 186
Interest Expense 889 817
Income From Continuing Operations Before Income Taxes 1,597 1,332
Income Tax Expense 193 178
Net Income Attributable to Duke Energy Corporation 1,379 1,138
Comprehensive Income 1,370 1,266
Duke Energy Florida    
Operating Revenues 1,444 1,436
Operating Expenses    
Cost of sales 381 523
Operation, maintenance and other 286 251
Depreciation and amortization 274 248
Property and other taxes 112 106
Total operating expenses 1,053 1,128
Gain (Loss) on Sales of Other Assets and Other, net 1 1
Operating Income 392 309
Other Income and Expenses, net 18 24
Interest Expense 118 111
Income From Continuing Operations Before Income Taxes 292 222
Income Tax Expense 58 43
Net Income Attributable to Duke Energy Corporation 234 179
Comprehensive Income $ 234 $ 179
v3.25.1
Condensed Consolidated Balance Sheets - Duke Energy Florida - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Current Assets    
Cash and cash equivalents $ 475 $ 314
Receivables (net of allowance for doubtful accounts) 3,996 2,232
Receivables of VIEs (net of allowance for doubtful accounts) 10 1,889
Inventory 4,418 4,509
Regulatory assets 2,538 2,756
Other (includes amounts related to VIEs) 780 695
Total current assets 12,775 12,950
Property, Plant and Equipment    
Cost 183,546 180,806
Accumulated depreciation and amortization (58,672) (57,503)
Net property, plant and equipment 124,874 123,303
Other Noncurrent Assets    
Regulatory assets 14,200 14,254
Nuclear decommissioning trust funds 11,246 11,434
Operating lease right-of-use assets, net 1,219 1,148
Other 3,502 3,509
Total other noncurrent assets 49,827 50,090
Total Assets 187,476 186,343
Current Liabilities    
Accounts payable 4,442 5,479
Taxes accrued 794 851
Interest accrued 821 855
Current maturities of long-term debt 4,180 4,349
Asset retirement obligations 643 650
Regulatory liabilities 1,298 1,425
Other 1,861 2,084
Total current liabilities 16,625 19,357
Long-Term Debt (includes amounts related to VIEs) 79,700 76,340
Other Noncurrent Liabilities    
Deferred income taxes 11,609 11,424
Asset retirement obligations 9,350 9,342
Regulatory liabilities 14,466 14,694
Operating lease liabilities 1,033 957
Accrued pension and other post-retirement benefit costs 426 434
Investment tax credits 888 894
Other 1,585 1,556
Total other noncurrent liabilities 39,357 39,390
Commitments and Contingencies
Equity    
Accumulated other comprehensive income 194 228
Total Liabilities and Equity 187,476 186,343
Duke Energy Florida    
Current Assets    
Cash and cash equivalents 16 33
Receivables (net of allowance for doubtful accounts) 545 544
Receivables of VIEs (net of allowance for doubtful accounts) 2 0
Inventory 773 745
Regulatory assets 921 1,022
Other (includes amounts related to VIEs) 56 227
Total current assets 2,474 2,592
Property, Plant and Equipment    
Cost 30,997 30,490
Accumulated depreciation and amortization (7,846) (7,650)
Net property, plant and equipment 23,151 22,840
Other Noncurrent Assets    
Regulatory assets 2,068 2,064
Nuclear decommissioning trust funds 305 331
Operating lease right-of-use assets, net 263 277
Other 479 465
Total other noncurrent assets 3,115 3,137
Total Assets 28,740 28,569
Current Liabilities    
Accounts payable 1,087 1,418
Taxes accrued 147 60
Interest accrued 130 86
Current maturities of long-term debt 1,235 534
Asset retirement obligations 1 1
Regulatory liabilities 120 174
Other 336 342
Total current liabilities 3,144 3,148
Long-Term Debt (includes amounts related to VIEs) 9,783 9,814
Other Noncurrent Liabilities    
Deferred income taxes 3,046 3,024
Asset retirement obligations 206 213
Regulatory liabilities 653 688
Operating lease liabilities 212 225
Accrued pension and other post-retirement benefit costs 91 92
Investment tax credits 241 241
Other 151 143
Total other noncurrent liabilities 4,600 4,626
Commitments and Contingencies
Equity    
Member's equity 11,218 10,986
Accumulated other comprehensive income (5) (5)
Total equity 11,213 10,981
Total Liabilities and Equity 28,740 28,569
Duke Energy Florida | Affiliated Entity    
Current Assets    
Receivables (net of allowance for doubtful accounts) 75 21
Notes receivable from affiliated companies 86 0
Current Liabilities    
Accounts payable 88 67
Notes payable to affiliated companies $ 0 $ 466
v3.25.1
Condensed Consolidated Balance Sheets - Duke Energy Florida (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Allowance for doubtful accounts - receivables $ 204 $ 124
Inventory 4,418 4,509
Regulatory assets 2,538 2,756
Current Assets: Other 780 695
Regulatory assets 14,200 14,254
Accounts payable 4,442 5,479
Current maturities of long-term debt 4,180 4,349
Long-Term Debt 79,700 76,340
Variable Interest Entity    
Inventory 509 494
Regulatory assets 120 120
Current Assets: Other 57 90
Regulatory assets 1,674 1,705
Accounts payable 207 214
Current maturities of long-term debt 110 1,012
Long-Term Debt 1,783 1,842
Duke Energy Florida    
Allowance for doubtful accounts - receivables 25 29
Inventory 773 745
Regulatory assets 921 1,022
Current Assets: Other 56 227
Regulatory assets 2,068 2,064
Accounts payable 1,087 1,418
Current maturities of long-term debt 1,235 534
Long-Term Debt 9,783 9,814
Duke Energy Florida | Affiliated Entity    
Accounts payable 88 67
Duke Energy Florida | Variable Interest Entity    
Inventory 509 494
Regulatory assets 61 61
Current Assets: Other 10 35
Regulatory assets 729 741
Accounts payable 201 208
Current maturities of long-term debt 60 59
Long-Term Debt 741 773
Duke Energy Progress    
Allowance for doubtful accounts - receivables 42 10
Inventory 1,333 1,341
Regulatory assets 616 626
Current Assets: Other 151 104
Regulatory assets 4,573 4,555
Accounts payable 603 749
Current maturities of long-term debt 581 983
Long-Term Debt 13,489 11,371
Duke Energy Progress | Affiliated Entity    
Accounts payable 436 306
Long-Term Debt 150 150
Duke Energy Progress | Variable Interest Entity    
Regulatory assets 47 47
Current Assets: Other 26 40
Regulatory assets 759 775
Current maturities of long-term debt 40 443
Long-Term Debt $ 789 $ 809
v3.25.1
Condensed Consolidated Statements of Cash Flows - Duke Energy Florida - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 1,404 $ 1,151
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization and accretion (including amortization of nuclear fuel) 1,691 1,534
Equity component of AFUDC (70) (55)
Deferred income taxes 192 149
Payments for asset retirement obligations (102) (115)
(Increase) decrease in    
Receivables 150 226
Inventory 99 11
Other current assets 107 329
Increase (decrease) in    
Accounts payable (866) (553)
Taxes accrued (52) (110)
Other current liabilities (468) (211)
Other assets (64) 42
Other liabilities 84 148
Net cash provided by operating activities 2,177 2,474
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (3,148) (3,208)
Purchases of debt and equity securities (1,966) (946)
Proceeds from sales and maturities of debt and equity securities 2,051 985
Other (237) (166)
Net cash used in investing activities (3,300) (3,342)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the issuance of long-term debt 4,096 3,481
Payments for the redemption of long-term debt (996) (1,392)
Other (11) (67)
Net cash provided by financing activities 1,238 1,029
Net increase in cash, cash equivalents and restricted cash 115 161
Cash, cash equivalents and restricted cash at beginning of period 421 357
Cash, cash equivalents and restricted cash at end of period 536 518
Significant non-cash transactions:    
Accrued capital expenditures 1,900 1,615
Duke Energy Florida    
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income 234 179
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization and accretion (including amortization of nuclear fuel) 342 284
Equity component of AFUDC (5) (5)
Deferred income taxes 18 10
Payments for asset retirement obligations (8) (22)
(Increase) decrease in    
Receivables 21 53
Receivables from affiliated companies (54) 236
Inventory (20) (19)
Other current assets 254 132
Increase (decrease) in    
Accounts payable (356) (48)
Accounts payable to affiliated companies 21 (14)
Taxes accrued 94 (51)
Other current liabilities (21) 11
Other assets (77) (16)
Other liabilities (6) 34
Net cash provided by operating activities 437 764
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (559) (669)
Purchases of debt and equity securities (53) (30)
Proceeds from sales and maturities of debt and equity securities 69 73
Notes receivable from affiliated companies (86) 0
Other (51) (62)
Net cash used in investing activities (680) (688)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the issuance of long-term debt 702 3
Payments for the redemption of long-term debt (34) (39)
Notes payable to affiliated companies (466) (86)
Other (1) (1)
Net cash provided by financing activities 201 (123)
Net increase in cash, cash equivalents and restricted cash (42) (47)
Cash, cash equivalents and restricted cash at beginning of period 75 67
Cash, cash equivalents and restricted cash at end of period 33 20
Significant non-cash transactions:    
Accrued capital expenditures $ 424 $ 421
v3.25.1
Condensed Consolidated Statements of Changes in Equity - Duke Energy Florida - USD ($)
$ in Millions
Total
Net Unrealized Gains (Losses) on Available-for-Sale Securities
Duke Energy Florida
Duke Energy Florida
Member's Equity
Duke Energy Florida
Net Unrealized Gains (Losses) on Available-for-Sale Securities
Beginning Balance (Parent) at Dec. 31, 2023 $ 50,187 $ (15) $ 10,043 $ 10,048 $ (5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) 1,138   179 179  
Other 0        
Ending Balance (Parent) at Mar. 31, 2024 50,638 (17) 10,222 10,227 (5)
Beginning Balance (Parent) at Dec. 31, 2024 51,256 (17) 10,981 10,986 (5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) 1,379   234 234  
Other (2)   (2) (2)  
Ending Balance (Parent) at Mar. 31, 2025 $ 51,794 $ (14) $ 11,213 $ 11,218 $ (5)
v3.25.1
Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Ohio - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Regulated electric $ 7,064 $ 6,732
Regulated natural gas 1,105 866
Total operating revenues 8,249 7,671
Operating Expenses    
Operation, maintenance and other 1,499 1,380
Depreciation and amortization 1,512 1,387
Property and other taxes 428 386
Total operating expenses 5,912 5,720
Operating Income 2,343 1,963
Other Income and Expenses, net 143 186
Interest Expense 889 817
Income From Continuing Operations Before Income Taxes 1,597 1,332
Income Tax Expense From Continuing Operations 193 178
Net Income Attributable to Duke Energy Corporation 1,379 1,138
Fuel used in electric generation and purchased power    
Operating Expenses    
Cost of sales 2,099 2,335
Cost of natural gas    
Operating Expenses    
Cost of sales 374 232
Duke Energy Ohio    
Regulated electric 487 458
Regulated natural gas 279 220
Total operating revenues 766 678
Operating Expenses    
Operation, maintenance and other 124 126
Depreciation and amortization 112 99
Property and other taxes 116 102
Total operating expenses 602 526
Operating Income 164 152
Other Income and Expenses, net 5 6
Interest Expense 47 45
Income From Continuing Operations Before Income Taxes 122 113
Income Tax Expense From Continuing Operations 22 19
Net Income Attributable to Duke Energy Corporation 100 94
Duke Energy Ohio | Fuel used in electric generation and purchased power    
Operating Expenses    
Cost of sales 149 138
Duke Energy Ohio | Cost of natural gas    
Operating Expenses    
Cost of sales $ 101 $ 61
v3.25.1
Condensed Consolidated Balance Sheets - Duke Energy Ohio - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Current Assets    
Cash and cash equivalents $ 475 $ 314
Receivables (net of allowance for doubtful accounts) 3,996 2,232
Inventory 4,418 4,509
Regulatory assets 2,538 2,756
Other (includes amounts related to VIEs) 780 695
Total current assets 12,775 12,950
Property, Plant and Equipment    
Cost 183,546 180,806
Accumulated depreciation and amortization (58,672) (57,503)
Net property, plant and equipment 124,874 123,303
Other Noncurrent Assets    
Goodwill 19,303 19,303
Regulatory assets 14,200 14,254
Operating lease right-of-use assets, net 1,219 1,148
Other 3,502 3,509
Total other noncurrent assets 49,827 50,090
Total Assets 187,476 186,343
Current Liabilities    
Accounts payable 4,442 5,479
Taxes accrued 794 851
Interest accrued 821 855
Current maturities of long-term debt 4,180 4,349
Asset retirement obligations 643 650
Regulatory liabilities 1,298 1,425
Other 1,861 2,084
Total current liabilities 16,625 19,357
Long-Term Debt (includes amounts related to VIEs) 79,700 76,340
Other Noncurrent Liabilities    
Deferred income taxes 11,609 11,424
Asset retirement obligations 9,350 9,342
Regulatory liabilities 14,466 14,694
Operating lease liabilities 1,033 957
Accrued pension and other post-retirement benefit costs 426 434
Other 1,585 1,556
Total other noncurrent liabilities 39,357 39,390
Commitments and Contingencies
Equity    
Common stock 1 1
Additional paid-in capital 45,516 45,494
Retained earnings 3,986 3,431
Total Duke Energy Corporation stockholders' equity 50,670 50,127
Total Liabilities and Equity 187,476 186,343
Duke Energy Ohio    
Current Assets    
Cash and cash equivalents 12 24
Inventory 184 183
Regulatory assets 73 88
Other (includes amounts related to VIEs) 19 30
Total current assets 807 811
Property, Plant and Equipment    
Cost 14,122 13,918
Accumulated depreciation and amortization (3,751) (3,674)
Net property, plant and equipment 10,371 10,244
Other Noncurrent Assets    
Goodwill 920 920
Regulatory assets 692 705
Operating lease right-of-use assets, net 6 6
Other 84 82
Total other noncurrent assets 1,702 1,713
Total Assets 12,880 12,768
Current Liabilities    
Taxes accrued 308 363
Interest accrued 54 49
Current maturities of long-term debt 290 245
Asset retirement obligations 7 8
Regulatory liabilities 51 34
Other 73 67
Total current liabilities 1,361 1,293
Long-Term Debt (includes amounts related to VIEs) 3,851 3,895
Other Noncurrent Liabilities    
Deferred income taxes 1,311 1,314
Asset retirement obligations 131 131
Regulatory liabilities 460 465
Operating lease liabilities 6 6
Accrued pension and other post-retirement benefit costs 90 89
Other 85 91
Total other noncurrent liabilities 2,083 2,096
Commitments and Contingencies
Equity    
Common stock 762 762
Additional paid-in capital 3,119 3,118
Retained earnings 1,679 1,579
Total Duke Energy Corporation stockholders' equity 5,560 5,459
Total Liabilities and Equity 12,880 12,768
Duke Energy Ohio | Nonrelated Party    
Current Assets    
Receivables (net of allowance for doubtful accounts) 482 447
Current Liabilities    
Accounts payable 282 313
Duke Energy Ohio | Affiliated Entity    
Current Assets    
Receivables (net of allowance for doubtful accounts) 12 11
Notes receivable from affiliated companies 25 28
Current Liabilities    
Accounts payable 69 52
Notes payable to affiliated companies 227 162
Long-Term Debt (includes amounts related to VIEs) $ 25 $ 25
v3.25.1
Condensed Consolidated Balance Sheets - Duke Energy Ohio (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Allowance for doubtful accounts - receivables $ 204 $ 124
Common stock, par value (in usd per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 2,000,000,000 2,000,000,000
Common stock, shares outstanding (in shares) 777,000,000 776,000,000
Duke Energy Ohio    
Allowance for doubtful accounts - receivables $ 46 $ 43
Common stock, par value (in usd per share) $ 8.50 $ 8.50
Common stock, shares authorized (in shares) 120,000,000 120,000,000
Common stock, shares outstanding (in shares) 90,000,000 90,000,000
v3.25.1
Condensed Consolidated Statements of Cash Flows - Duke Energy Ohio - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 1,404 $ 1,151
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization and accretion (including amortization of nuclear fuel) 1,691 1,534
Equity component of AFUDC (70) (55)
Deferred income taxes 192 149
Payments for asset retirement obligations (102) (115)
(Increase) decrease in    
Receivables 150 226
Inventory 99 11
Other current assets 107 329
Increase (decrease) in    
Accounts payable (866) (553)
Taxes accrued (52) (110)
Other current liabilities (468) (211)
Other assets (64) 42
Other liabilities 84 148
Net cash provided by operating activities 2,177 2,474
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (3,148) (3,208)
Other (237) (166)
Net cash used in investing activities (3,300) (3,342)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the issuance of long-term debt 4,096 3,481
Other (11) (67)
Net cash provided by financing activities 1,238 1,029
Net increase in cash, cash equivalents and restricted cash 115 161
Cash, cash equivalents and restricted cash at beginning of period 421 357
Cash, cash equivalents and restricted cash at end of period 536 518
Significant non-cash transactions:    
Accrued capital expenditures 1,900 1,615
Duke Energy Ohio    
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income 100 94
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization and accretion (including amortization of nuclear fuel) 113 100
Equity component of AFUDC (3) 0
Deferred income taxes (11) 2
Payments for asset retirement obligations (1) (1)
(Increase) decrease in    
Receivables (36) 12
Receivables from affiliated companies (1) 65
Inventory (1) (5)
Other current assets 35 100
Increase (decrease) in    
Accounts payable (15) (20)
Accounts payable to affiliated companies 17 (2)
Taxes accrued (54) (67)
Other current liabilities 26 (7)
Other assets 2 7
Other liabilities 0 (17)
Net cash provided by operating activities 171 261
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (224) (217)
Notes receivable from affiliated companies 3 (166)
Other (26) (10)
Net cash used in investing activities (247) (393)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the issuance of long-term debt 0 424
Notes payable to affiliated companies 65 (307)
Other (1) (4)
Net cash provided by financing activities 64 113
Net increase in cash, cash equivalents and restricted cash (12) (19)
Cash, cash equivalents and restricted cash at beginning of period 24 24
Cash, cash equivalents and restricted cash at end of period 12 5
Significant non-cash transactions:    
Accrued capital expenditures $ 95 $ 84
v3.25.1
Condensed Consolidated Statements of Changes in Equity - Duke Energy Ohio - USD ($)
$ in Millions
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Duke Energy Ohio
Duke Energy Ohio
Common Stock
Duke Energy Ohio
Additional Paid-in Capital
Duke Energy Ohio
Retained Earnings
Beginning Balance (Parent) at Dec. 31, 2023 $ 50,187 $ 1 $ 44,920 $ 2,235 $ 5,100 $ 762 $ 3,100 $ 1,238
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income (loss) 1,138       94     94
Other 0   1 0        
Ending Balance (Parent) at Mar. 31, 2024 50,638 1 44,937 2,542 5,194 762 3,100 1,332
Beginning Balance (Parent) at Dec. 31, 2024 51,256 1 45,494 3,431 5,459 762 3,118 1,579
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income (loss) 1,379       100     100
Other (2)     4 1   1  
Ending Balance (Parent) at Mar. 31, 2025 $ 51,794 $ 1 $ 45,516 $ 3,986 $ 5,560 $ 762 $ 3,119 $ 1,679
v3.25.1
Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Indiana - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Operating Revenues $ 8,249 $ 7,671
Operating Expenses    
Operation, maintenance and other 1,499 1,380
Depreciation and amortization 1,512 1,387
Property and other taxes 428 386
Total operating expenses 5,912 5,720
Operating Income 2,343 1,963
Other Income and Expenses, net 143 186
Interest Expense 889 817
Income From Continuing Operations Before Income Taxes 1,597 1,332
Income Tax Expense From Continuing Operations 193 178
Net Income Attributable to Duke Energy Corporation 1,379 1,138
Other comprehensive income (loss) [1] (34) 115
Comprehensive Income 1,370 1,266
Duke Energy Indiana    
Operating Revenues 858 759
Operating Expenses    
Cost of sales 260 271
Operation, maintenance and other 195 180
Depreciation and amortization 192 169
Property and other taxes 18 14
Total operating expenses 665 634
Operating Income 193 125
Other Income and Expenses, net 10 13
Interest Expense 59 57
Income From Continuing Operations Before Income Taxes 144 81
Income Tax Expense From Continuing Operations 18 14
Net Income Attributable to Duke Energy Corporation 126 67
Other comprehensive income (loss) 0 (1)
Comprehensive Income $ 126 $ 66
[1] Net of income tax benefit of $10 million and income tax expense of $34 million for the three months ended March 31, 2025, and 2024, respectively.
v3.25.1
Condensed Consolidated Balance Sheets - Duke Energy Indiana - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Current Assets    
Cash and cash equivalents $ 475 $ 314
Receivables (net of allowance for doubtful accounts) 3,996 2,232
Inventory 4,418 4,509
Regulatory assets 2,538 2,756
Total current assets 12,775 12,950
Property, Plant and Equipment    
Cost 183,546 180,806
Accumulated depreciation and amortization (58,672) (57,503)
Net property, plant and equipment 124,874 123,303
Other Noncurrent Assets    
Regulatory assets 14,200 14,254
Operating lease right-of-use assets, net 1,219 1,148
Other 3,502 3,509
Total other noncurrent assets 49,827 50,090
Total Assets 187,476 186,343
Current Liabilities    
Accounts payable 4,442 5,479
Taxes accrued 794 851
Interest accrued 821 855
Current maturities of long-term debt 4,180 4,349
Asset retirement obligations 643 650
Regulatory liabilities 1,298 1,425
Other 1,861 2,084
Total current liabilities 16,625 19,357
Long-Term Debt (includes amounts related to VIEs) 79,700 76,340
Other Noncurrent Liabilities    
Deferred income taxes 11,609 11,424
Asset retirement obligations 9,350 9,342
Regulatory liabilities 14,466 14,694
Operating lease liabilities 1,033 957
Accrued pension and other post-retirement benefit costs 426 434
Investment tax credits 888 894
Other 1,585 1,556
Total other noncurrent liabilities 39,357 39,390
Commitments and Contingencies
Equity    
Total Liabilities and Equity 187,476 186,343
Duke Energy Indiana    
Current Assets    
Cash and cash equivalents 9 13
Inventory 541 586
Regulatory assets 142 113
Other 109 69
Total current assets 1,268 1,205
Property, Plant and Equipment    
Cost 20,210 19,970
Accumulated depreciation and amortization (7,008) (6,848)
Net property, plant and equipment 13,202 13,122
Other Noncurrent Assets    
Regulatory assets 1,031 1,040
Operating lease right-of-use assets, net 35 37
Other 254 323
Total other noncurrent assets 1,320 1,400
Total Assets 15,790 15,727
Current Liabilities    
Taxes accrued 105 168
Interest accrued 73 59
Current maturities of long-term debt 4 4
Asset retirement obligations 156 164
Regulatory liabilities 205 183
Other 167 183
Total current liabilities 1,101 1,085
Long-Term Debt (includes amounts related to VIEs) 4,644 4,644
Other Noncurrent Liabilities    
Deferred income taxes 1,496 1,494
Asset retirement obligations 1,108 1,104
Regulatory liabilities 1,351 1,404
Operating lease liabilities 31 33
Accrued pension and other post-retirement benefit costs 83 82
Investment tax credits 186 186
Other 21 19
Total other noncurrent liabilities 4,276 4,322
Commitments and Contingencies
Equity    
Member's equity 5,619 5,526
Total equity 5,619 5,526
Total Liabilities and Equity 15,790 15,727
Duke Energy Indiana | Nonrelated Party    
Current Assets    
Receivables (net of allowance for doubtful accounts) 466 423
Current Liabilities    
Accounts payable 286 257
Duke Energy Indiana | Affiliated Entity    
Current Assets    
Receivables (net of allowance for doubtful accounts) 1 1
Current Liabilities    
Accounts payable 85 57
Notes payable to affiliated companies 20 10
Long-Term Debt (includes amounts related to VIEs) $ 150 $ 150
v3.25.1
Condensed Consolidated Balance Sheets - Duke Energy Indiana (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Allowance for doubtful accounts - receivables $ 204 $ 124
Duke Energy Indiana    
Allowance for doubtful accounts - receivables $ 17 $ 15
v3.25.1
Condensed Consolidated Statements of Cash Flows - Duke Energy Indiana - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 1,404 $ 1,151
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization and accretion (including amortization of nuclear fuel) 1,691 1,534
Equity component of AFUDC (70) (55)
Deferred income taxes 192 149
Payments for asset retirement obligations (102) (115)
(Increase) decrease in    
Receivables 150 226
Inventory 99 11
Other current assets 107 329
Increase (decrease) in    
Accounts payable (866) (553)
Taxes accrued (52) (110)
Other current liabilities (468) (211)
Other assets (64) 42
Other liabilities 84 148
Net cash provided by operating activities 2,177 2,474
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (3,148) (3,208)
Purchases of debt and equity securities (1,966) (946)
Proceeds from sales and maturities of debt and equity securities 2,051 985
Other (237) (166)
Net cash used in investing activities (3,300) (3,342)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the issuance of long-term debt 4,096 3,481
Other (11) (67)
Net cash provided by financing activities 1,238 1,029
Net increase in cash, cash equivalents and restricted cash 115 161
Cash, cash equivalents and restricted cash at beginning of period 421 357
Cash, cash equivalents and restricted cash at end of period 536 518
Significant non-cash transactions:    
Accrued capital expenditures 1,900 1,615
Duke Energy Indiana    
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income 126 67
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization and accretion (including amortization of nuclear fuel) 192 170
Equity component of AFUDC (7) (2)
Deferred income taxes (16) 24
Payments for asset retirement obligations (18) (12)
(Increase) decrease in    
Receivables (45) 35
Receivables from affiliated companies 0 (6)
Inventory 46 48
Other current assets (37) 30
Increase (decrease) in    
Accounts payable 9 (39)
Accounts payable to affiliated companies 28 (57)
Taxes accrued (63) 9
Other current liabilities 8 32
Other assets 79 (13)
Other liabilities (27) (7)
Net cash provided by operating activities 275 279
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (234) (275)
Purchases of debt and equity securities (39) (5)
Proceeds from sales and maturities of debt and equity securities 112 4
Notes receivable from affiliated companies 0 (117)
Other (94) (24)
Net cash used in investing activities (255) (417)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the issuance of long-term debt 0 298
Notes payable to affiliated companies 10 (120)
Distributions to parent (33) (42)
Other (1) (1)
Net cash provided by financing activities (24) 135
Net increase in cash, cash equivalents and restricted cash (4) (3)
Cash, cash equivalents and restricted cash at beginning of period 13 8
Cash, cash equivalents and restricted cash at end of period 9 5
Significant non-cash transactions:    
Accrued capital expenditures $ 146 $ 88
v3.25.1
Condensed Consolidated Statements of Changes in Equity - Duke Energy Indiana - USD ($)
$ in Millions
Total
Pension and OPEB Adjustments
Duke Energy Indiana
Duke Energy Indiana
Member's Equity
Duke Energy Indiana
Pension and OPEB Adjustments
Beginning Balance (Parent) at Dec. 31, 2023 $ 50,187 $ (89) $ 5,013 $ 5,012 $ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) 1,138   67 67  
Other 0   (2) (1) (1)
Distributions to parent (792)        
Ending Balance (Parent) at Mar. 31, 2024 50,638 (73) 5,078 5,078 0
Beginning Balance (Parent) at Dec. 31, 2024 51,256 (81) 5,526 5,526 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) 1,379   126 126  
Other (2)        
Distributions to parent (814)   (33) (33)  
Ending Balance (Parent) at Mar. 31, 2025 $ 51,794 $ (81) $ 5,619 $ 5,619 $ 0
v3.25.1
Condensed Consolidated Statements of Operations and Comprehensive Income - Piedmont - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Nonregulated electric and other $ 80 $ 73
Regulated natural gas 1,105 866
Total operating revenues 8,249 7,671
Operating Expenses    
Operation, maintenance and other 1,499 1,380
Depreciation and amortization 1,512 1,387
Property and other taxes 428 386
Total operating expenses 5,912 5,720
Operating Income 2,343 1,963
Other Income and Expenses    
Equity in earnings of unconsolidated affiliates 11 17
Other income and expenses, net 132 169
Total other income and expenses 143 186
Interest Expense 889 817
Income From Continuing Operations Before Income Taxes 1,597 1,332
Income Tax Expense From Continuing Operations 193 178
Net Income Attributable to Duke Energy Corporation 1,379 1,138
Comprehensive Income Attributable to Duke Energy 1,345 1,253
Piedmont    
Nonregulated electric and other 7 7
Regulated natural gas 850 669
Total operating revenues 857 676
Operating Expenses    
Cost of natural gas 272 170
Operation, maintenance and other 96 95
Depreciation and amortization 70 62
Property and other taxes 18 15
Total operating expenses 456 342
Operating Income 401 334
Other Income and Expenses    
Equity in earnings of unconsolidated affiliates 2 2
Other income and expenses, net 11 15
Total other income and expenses 13 17
Interest Expense 47 45
Income From Continuing Operations Before Income Taxes 367 306
Income Tax Expense From Continuing Operations 76 60
Net Income Attributable to Duke Energy Corporation 291 246
Comprehensive Income Attributable to Duke Energy $ 291 $ 246
v3.25.1
Condensed Consolidated Balance Sheets - Piedmont - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Current Assets    
Cash and cash equivalents $ 475 $ 314
Receivables (net of allowance for doubtful accounts) 3,996 2,232
Inventory 4,418 4,509
Regulatory assets 2,538 2,756
Other (includes amounts related to VIEs) 780 695
Total current assets 12,775 12,950
Property, Plant and Equipment    
Cost 183,546 180,806
Accumulated depreciation and amortization (58,672) (57,503)
Net property, plant and equipment 124,874 123,303
Other Noncurrent Assets    
Goodwill 19,303 19,303
Regulatory assets 14,200 14,254
Operating lease right-of-use assets, net 1,219 1,148
Investments in equity method unconsolidated affiliates 357 353
Other 3,502 3,509
Total other noncurrent assets 49,827 50,090
Total Assets 187,476 186,343
Current Liabilities    
Accounts payable 4,442 5,479
Taxes accrued 794 851
Interest accrued 821 855
Current maturities of long-term debt 4,180 4,349
Regulatory liabilities 1,298 1,425
Other 1,861 2,084
Total current liabilities 16,625 19,357
Long-Term Debt (includes amounts related to VIEs) 79,700 76,340
Other Noncurrent Liabilities    
Deferred income taxes 11,609 11,424
Asset retirement obligations 9,350 9,342
Regulatory liabilities 14,466 14,694
Operating lease liabilities 1,033 957
Accrued pension and other post-retirement benefit costs 426 434
Other 1,585 1,556
Total other noncurrent liabilities 39,357 39,390
Commitments and Contingencies
Equity    
Common stock 1 1
Retained earnings 3,986 3,431
Total Duke Energy Corporation stockholders' equity 50,670 50,127
Noncontrolling interests 1,124 1,129
Total equity 51,794 51,256
Total Liabilities and Equity 187,476 186,343
Piedmont    
Current Assets    
Cash and cash equivalents 10 2
Inventory 61 78
Regulatory assets 109 158
Other (includes amounts related to VIEs) 10 11
Total current assets 606 633
Property, Plant and Equipment    
Cost 12,956 12,780
Accumulated depreciation and amortization (2,487) (2,432)
Net property, plant and equipment 10,469 10,348
Other Noncurrent Assets    
Goodwill 49 49
Regulatory assets 435 421
Operating lease right-of-use assets, net 3 4
Investments in equity method unconsolidated affiliates 76 76
Other 271 268
Total other noncurrent assets 834 818
Total Assets 11,909 11,799
Current Liabilities    
Accounts payable 209 237
Taxes accrued 123 84
Interest accrued 50 45
Current maturities of long-term debt 205 205
Regulatory liabilities 9 68
Other 79 76
Total current liabilities 1,304 1,480
Long-Term Debt (includes amounts related to VIEs) 3,799 3,798
Other Noncurrent Liabilities    
Deferred income taxes 1,013 1,018
Asset retirement obligations 29 29
Regulatory liabilities 960 956
Operating lease liabilities 2 7
Accrued pension and other post-retirement benefit costs 6 7
Other 151 150
Total other noncurrent liabilities 2,161 2,167
Commitments and Contingencies
Equity    
Common stock 1,635 1,635
Retained earnings 3,009 2,718
Total Duke Energy Corporation stockholders' equity 4,644 4,353
Noncontrolling interests 1 1
Total equity 4,645 4,354
Total Liabilities and Equity 11,909 11,799
Piedmont | Nonrelated Party    
Current Assets    
Receivables (net of allowance for doubtful accounts) 404 368
Piedmont | Affiliated Entity    
Current Assets    
Receivables (net of allowance for doubtful accounts) 12 16
Current Liabilities    
Accounts payable 49 26
Notes payable to affiliated companies $ 580 $ 739
v3.25.1
Condensed Consolidated Balance Sheets - Piedmont (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Allowance for doubtful accounts - receivables $ 204 $ 124
Common stock, shares authorized (in shares) 2,000,000,000 2,000,000,000
Common stock, shares outstanding (in shares) 777,000,000 776,000,000
Piedmont    
Allowance for doubtful accounts - receivables $ 10 $ 10
Common stock, shares authorized (in shares) 100 100
Common stock, shares outstanding (in shares) 100 100
v3.25.1
Condensed Consolidated Statements of Cash Flows - Duke Energy Piedmont - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 1,404 $ 1,151
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization and accretion (including amortization of nuclear fuel) 1,691 1,534
Equity component of AFUDC (70) (55)
Deferred income taxes 192 149
Equity in earnings of unconsolidated affiliates (11) (17)
(Increase) decrease in    
Receivables 150 226
Inventory 99 11
Other current assets 107 329
Increase (decrease) in    
Accounts payable (866) (553)
Taxes accrued (52) (110)
Other current liabilities (468) (211)
Other assets (64) 42
Other liabilities 84 148
Net cash provided by operating activities 2,177 2,474
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (3,148) (3,208)
Other (237) (166)
Net cash used in investing activities (3,300) (3,342)
CASH FLOWS FROM FINANCING ACTIVITIES    
Other (11) (67)
Net cash provided by financing activities 1,238 1,029
Net increase in cash, cash equivalents and restricted cash 115 161
Cash, cash equivalents and restricted cash at beginning of period 421 357
Cash, cash equivalents and restricted cash at end of period 536 518
Significant non-cash transactions:    
Accrued capital expenditures 1,900 1,615
Piedmont    
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income 291 246
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization and accretion (including amortization of nuclear fuel) 71 63
Equity component of AFUDC (4) (6)
Deferred income taxes (13) (15)
Equity in earnings of unconsolidated affiliates (2) (2)
(Increase) decrease in    
Receivables (38) 13
Receivables from affiliated companies 4 (2)
Inventory 17 48
Other current assets 55 20
Increase (decrease) in    
Accounts payable (27) (43)
Accounts payable to affiliated companies 23 2
Taxes accrued 39 12
Other current liabilities (54) (1)
Other assets (7) (2)
Other liabilities (2) 9
Net cash provided by operating activities 353 342
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (182) (294)
Other (3) (18)
Net cash used in investing activities (185) (312)
CASH FLOWS FROM FINANCING ACTIVITIES    
Notes payable to affiliated companies (159) (30)
Other (1) 0
Net cash provided by financing activities (160) (30)
Net increase in cash, cash equivalents and restricted cash 8 0
Cash, cash equivalents and restricted cash at beginning of period 2 0
Cash, cash equivalents and restricted cash at end of period 10 0
Significant non-cash transactions:    
Accrued capital expenditures $ 114 $ 195
v3.25.1
Condensed Consolidated Statements of Changes in Equity - Piedmont - USD ($)
$ in Millions
Total
Common Stock
Retained Earnings
Total Equity
Noncontrolling Interests
Piedmont
Piedmont
Common Stock
Piedmont
Retained Earnings
Piedmont
Total Equity
Piedmont
Noncontrolling Interests
Beginning Balance (Parent) at Dec. 31, 2023 $ 50,187 $ 1 $ 2,235 $ 49,112 $ 1,075 $ 4,052 $ 1,635 $ 2,416 $ 4,051 $ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Net income 1,151         246   246 246  
Ending Balance (Parent) at Mar. 31, 2024 50,638 1 2,542 49,551 1,087 4,298 1,635 2,662 4,297 1
Beginning Balance (Parent) at Dec. 31, 2024 51,256 1 3,431 50,127 1,129 4,354 1,635 2,718 4,353 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Net income 1,404         291   291 291  
Ending Balance (Parent) at Mar. 31, 2025 $ 51,794 $ 1 $ 3,986 $ 50,670 $ 1,124 $ 4,645 $ 1,635 $ 3,009 $ 4,644 $ 1
v3.25.1
Organization and Basis of Presentation
 3 Months Ended
Mar. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Organization and Basis of Presentation ORGANIZATION AND BASIS OF PRESENTATION
BASIS OF PRESENTATION
These Condensed Consolidated Financial Statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Regulation S-X. Accordingly, these Condensed Consolidated Financial Statements do not include all information and notes required by GAAP for annual financial statements and should be read in conjunction with the Consolidated Financial Statements in Duke Energy's Annual Report on Form 10-K for the year ended December 31, 2024.
The information in these combined notes relates to each of the Duke Energy Registrants as noted in the Index to Combined Notes to Condensed Consolidated Financial Statements. However, none of the registrants make any representations as to information related solely to Duke Energy or the subsidiaries of Duke Energy other than itself.
These Condensed Consolidated Financial Statements, in the opinion of the respective companies’ management, reflect all normal recurring adjustments necessary to fairly present the financial position and results of operations of each of the Duke Energy Registrants. Amounts reported in Duke Energy’s interim Condensed Consolidated Statements of Operations and each of the Subsidiary Registrants’ interim Condensed Consolidated Statements of Operations and Comprehensive Income are not necessarily indicative of amounts expected for the respective annual periods due to effects of seasonal temperature variations on energy consumption, regulatory rulings, timing of maintenance on electric generating units, changes in mark-to-market valuations, changing commodity prices and other factors.
In preparing financial statements that conform to GAAP, management must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.
BASIS OF CONSOLIDATION
These Condensed Consolidated Financial Statements include, after eliminating intercompany transactions and balances, the accounts of the Duke Energy Registrants and subsidiaries or VIEs where the respective Duke Energy Registrants have control. See Note 12 for additional information on VIEs. These Condensed Consolidated Financial Statements also reflect the Duke Energy Registrants’ proportionate share of certain jointly owned generation and transmission facilities.
Discontinued Operations
Duke Energy has elected to present cash flows of discontinued operations combined with cash flows of continuing operations. Unless otherwise noted, the notes to these condensed consolidated financial statements exclude amounts related to discontinued operations for all periods presented. A portion of NCI on Duke Energy's Condensed Consolidated Balance Sheet as of December 31, 2024, relates to discontinued operations. See Note 2 for discussion of discontinued operations related to the Commercial Renewables Disposal Groups.
CASH, CASH EQUIVALENTS AND RESTRICTED CASH
Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress and Duke Energy Florida have restricted cash balances related primarily to collateral assets, escrow deposits and VIEs. See Notes 10 and 12 for additional information. Restricted cash amounts are included in Other within Current Assets and Other Noncurrent Assets on the Condensed Consolidated Balance Sheets. The following table presents the components of cash, cash equivalents and restricted cash included in the Condensed Consolidated Balance Sheets.
March 31, 2025December 31, 2024
DukeDukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyDukeEnergyProgressEnergyEnergy
EnergyCarolinasEnergyProgressFlorida
Energy
CarolinasEnergyProgressFlorida
Current Assets
Cash and cash equivalents$475 $46 $87 $53 $16 $314 $6 $73 $24 $33 
Other39 6 34 23 10 84 9 76 40 35 
Other Noncurrent Assets
Other22 1 11 5 7 20 1 11 5 7 
Total cash, cash equivalents and restricted cash$536 $53 $132 $81 $33 $418 $16 $160 $69 $75 
INVENTORY
Provisions for inventory write-offs were not material at March 31, 2025, and December 31, 2024. The components of inventory are presented in the tables below.
 March 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions) EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Materials and supplies $3,413 $1,133 $1,677 $1,090 $586 $155 $399 $12 
Coal700 309 233 137 96 18 140 — 
Natural gas, oil and other fuel305 46 197 106 91 11 2 49 
Total inventory $4,418 $1,488 $2,107 $1,333 $773 $184 $541 $61 
 December 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions) EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Materials and supplies $3,387 $1,150 $1,649 $1,074 $576 $149 $389 $11 
Coal801 341 241 164 77 23 196 — 
Natural gas, oil and other fuel321 45 196 103 92 11 1 67 
Total inventory $4,509 $1,536 $2,086 $1,341 $745 $183 $586 $78 
OTHER NONCURRENT ASSETS
Duke Energy, through a nonregulated subsidiary, was the winner of the Carolina Long Bay offshore wind auction in May 2022 and recorded an asset of $150 million related to the arrangement in Other within Other noncurrent assets on the Condensed Consolidated Balance Sheets as of March 31, 2025, and December 31, 2024.
ACCOUNTS PAYABLE
Duke Energy has a voluntary supply chain finance program (the “program”) that allows Duke Energy suppliers, at their sole discretion, to sell their receivables from Duke Energy to a global financial institution at a rate that leverages Duke Energy’s credit rating and which may result in favorable terms compared to the rate available to the supplier on their own credit rating. Suppliers participating in the program determine at their sole discretion which invoices they will sell to the financial institution. Suppliers’ decisions on which invoices are sold do not impact Duke Energy’s payment terms which are based on commercial terms negotiated between Duke Energy and the supplier regardless of program participation. The commercial terms negotiated between Duke Energy and its suppliers are consistent regardless of whether the supplier elects to participate in the program. Duke Energy does not issue any guarantees with respect to the program and does not participate in negotiations between suppliers and the financial institution. Duke Energy does not have an economic interest in the supplier’s decision to participate in the program and receives no interest, fees or other benefit from the financial institution based on supplier participation in the program.
The following table presents the amounts included within Accounts payable on the Condensed Consolidated Balance Sheets sold to the financial institution by our suppliers and the supplier invoices sold to the financial institution under the program included within Net cash provided by operating activities on the Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2025, and 2024.
Three Months Ended March 31, 2024 and 2025
Duke
DukeProgressEnergy
(in millions)EnergyEnergyFloridaPiedmont
Confirmed obligations outstanding at December 31, 2023
$50 $3 $3 $47 
Invoices confirmed during the period57 1 1 56 
Confirmed invoices paid during the period(31)(2)(2)(29)
Confirmed obligations outstanding at March 31, 2024
$76 $2 $2 $74 
Confirmed obligations outstanding at December 31, 2024
$13 $1 $1 $12 
Invoices confirmed during the period18 — — 18 
Confirmed invoices paid during the period(13)(1)(1)(12)
Confirmed obligations outstanding at March 31, 2025
$18 $— $— $18 
NEW ACCOUNTING STANDARDS
No new accounting standards were adopted by the Duke Energy Registrants in 2025.
v3.25.1
Dispositions
 3 Months Ended
Mar. 31, 2025
Discontinued Operations and Disposal Groups [Abstract]  
Dispositions DISPOSITIONS
Sale of Commercial Renewables Segment
In 2023, Duke Energy completed the sale of substantially all the assets in the Commercial Renewables business segment. Duke Energy closed on the transaction with Brookfield on October 25, 2023, for proceeds of $1.1 billion, with approximately half of the proceeds received at closing and the remainder due 18 months after closing. The balance of the remaining proceeds to be received of $558 million is included in Receivable from sales of Commercial Renewables Disposal Groups, as of March 31, 2025, and $551 million as of December 31, 2024, on Duke Energy's Condensed Consolidated Balance Sheets. On April 28, 2025, Duke Energy received the remaining sale proceeds from Brookfield.
In January 2025, a sale of the remaining Commercial Renewables business assets was completed and proceeds from that disposition were not material.
Assets Held For Sale and Discontinued Operations
The Commercial Renewables Disposal Groups were classified as held for sale and as discontinued operations in the fourth quarter of 2022. No interest from corporate level debt was allocated to discontinued operations. Unless otherwise noted, the notes to these condensed consolidated financial statements exclude amounts related to discontinued operations for all periods presented.
The following table presents the carrying values of the major classes of Assets held for sale and Liabilities associated with assets held for sale included in Duke Energy's Condensed Consolidated Balance Sheets.
(in millions)March 31, 2025December 31, 2024
Current Assets Held for Sale
Other$— $4 
Total current assets held for sale— 4 
Noncurrent Assets Held for Sale
Property, Plant and Equipment
Cost— 109 
Accumulated depreciation and amortization— (24)
Net property, plant and equipment— 85 
Operating lease right-of-use assets, net— 4 
Total other noncurrent assets held for sale— 4 
Total Assets Held for Sale$— $93 
Current Liabilities Associated with Assets Held for Sale
Accounts payable$18 $19 
Taxes accrued— 1 
Current maturities of long-term debt— 43 
Unrealized losses on commodity hedges
— 13 
Other— 4 
Total current liabilities associated with assets held for sale18 80 
Noncurrent Liabilities Associated with Assets Held for Sale
Operating lease liabilities— 5 
Asset retirement obligations— 5 
Unrealized losses on commodity hedges
— 66 
Other— 13 
Total other noncurrent liabilities associated with assets held for sale— 89 
Total Liabilities Associated with Assets Held for Sale$18 $169 
As of March 31, 2025, the remaining held for sale liability balance relates to Disposal Group assets previously sold and is expected to settle by December 31, 2025.
As of December 31, 2024, the noncontrolling interest balance is $18 million.
The following table presents the results of the Commercial Renewables Disposal Groups, which are included in Loss from Discontinued Operations, net of tax in Duke Energy's Condensed Consolidated Statements of Operations.
Three Months Ended
March 31,
(in millions)20252024
Operating revenues$4 $(6)
Operation, maintenance and other1 4
Interest expense— 2
Loss (Gain) on disposal
4 (10)
Loss before income taxes(1)(2)
Income tax (benefit) expense
(1)1 
Net loss from discontinued operations attributable to Duke Energy Corporation
$— $(3)
Duke Energy has elected not to separately disclose discontinued operations on Duke Energy's Condensed Consolidated Statements of Cash Flows. The following table summarizes Duke Energy's cash flows from discontinued operations related to the Commercial Renewables Disposal Groups.
Three Months Ended
March 31,
(in millions)20252024
Cash flows used in:
Operating activities$(3)$(3)
Other Sale-Related Matters
As part of the purchase and sale agreement for the distributed generation group, Duke Energy has agreed to retain certain guarantees, with expiration dates between 2029 through 2034, related to tax equity partners' assets and operations that will be disposed of via sale. Duke Energy has obtained certain guarantees from the buyers in regards to future performance obligations to assist in limiting Duke Energy's exposure under the retained guarantees. The fair value of the guarantees is immaterial as Duke Energy does not believe conditions are likely for performance under these guarantees.
v3.25.1
Business Segments
 3 Months Ended
Mar. 31, 2025
Segment Reporting [Abstract]  
Business Segments BUSINESS SEGMENTS
Duke Energy
Duke Energy's segment structure includes the following two segments: EU&I and GU&I.
The EU&I segment primarily includes Duke Energy's regulated electric utilities in the Carolinas, Florida and the Midwest. EU&I also includes Duke Energy's electric transmission infrastructure investments and the offshore wind contract for Carolina Long Bay.
The GU&I segment includes Piedmont, Duke Energy's natural gas local distribution companies in Ohio and Kentucky and Duke Energy's natural gas storage, midstream pipeline and renewable natural gas investments.
The remainder of Duke Energy’s operations is presented as Other, which is primarily comprised of interest expense on holding company debt, unallocated corporate costs, Duke Energy’s wholly owned captive insurance company, Bison, and Duke Energy's ownership interest in NMC.
Business segment information is presented in the following tables. Segment assets presented exclude intercompany assets.
Three Months Ended March 31, 2025
ElectricGasTotal
Utilities andUtilities andReportable
(in millions)InfrastructureInfrastructureSegmentsOtherEliminationsTotal
Unaffiliated revenues$7,125 $1,116 $8,241 $8 $— $8,249 
Intersegment revenues15 24 39 34 (73)— 
Total operating revenues
$7,140 $1,140 $8,280 $42 $(73)$8,249 
Less:
Fuel used in electric generation and purchased power$2,119 $— $2,119 $— $(20)$2,099 
Cost of natural gas— 374 374 — — 374 
Operation, maintenance and other1,424 125 1,549 2 (52)1,499 
Depreciation and amortization1,334 107 1,441 77 (6)1,512 
Property and other taxes378 47 425 3 — 428 
Interest expense530 65 595 318 (24)889 
Income tax expense (benefit)189 91 280 (87)— 193 
Other Segment Items— 
Noncontrolling interests(a)
25 — 25 — — 25 
Preferred dividends— — — 14 — 14 
Add: Equity in earnings of unconsolidated affiliates
— 5 5 6 — 11 
Add: Other(b)
135 13 148 19 (29)138 
Segment income (loss)
$1,276 $349 $1,625 $(260)$— $1,365 
Net income available to Duke Energy Corporation Common Stockholders
$1,365 
Add back: Net income attributable to noncontrolling interest
25 
Add back: Preferred dividends
14 
Net Income
$1,404 
Capital investments expenditures and acquisitions$2,814 $249 $3,063 $85 $— $3,148 
Segment assets
164,794 18,233 183,027 4,449 — 187,476 
Three Months Ended March 31, 2024
ElectricGasTotal
Utilities andUtilities andReportable
(in millions)InfrastructureInfrastructureSegmentsOtherEliminationsTotal
Unaffiliated revenues$6,785 $879 $7,664 $7 $— $7,671 
Intersegment revenues18 23 41 31 (72)— 
Total operating revenues
$6,803 $902 $7,705 $38 $(72)$7,671 
Less:
Fuel used in electric generation and purchased power$2,355 $— $2,355 $— $(20)$2,335 
Cost of natural gas— 232 232 — — 232 
Operation, maintenance and other1,317 129 1,446 (18)(48)1,380 
Depreciation and amortization1,225 98 1,323 71 (7)1,387 
Property and other taxes337 46 383 3 — 386 
Interest expense499 61 560 294 (37)817 
Income tax expense (benefit)173 69 242 (64)— 178 
Other Segment Items
Noncontrolling interests(a)
13 — 13 — — 13 
Preferred dividends— — — 39 — 39 
Add: Equity in earnings of unconsolidated affiliates
1 — 1 17 (1)17 
Add: Other(b)
136 17 153 67 (39)181 
Segment income (loss)
$1,021 $284 $1,305 $(203)$— $1,102 
Discontinued Operations
(3)
Net income available to Duke Energy Corporation Common Stockholders
$1,099 
Add back: Net Income available to noncontrolling interest
13 
Add back: Preferred dividends
39 
Net Income
$1,151 
Capital investments expenditures and acquisitions$2,746 $382 $3,128 $87 $— $3,215 
Segment assets
156,606 17,464 174,070 4,600 — 178,670 
(a)Net income attributable to NCI related to continuing operations.
(b)    Other for EU&I and GU&I includes Gains on sales of other assets and other, net, and Other income and expenses, net.
Duke Energy Carolinas
Duke Energy Carolinas has one reportable segment, EU&I. The remainder of Duke Energy Carolinas' operations is presented as Other.
Three Months Ended March 31, 2025
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$2,524 $— $2,524 
Less:
Fuel used in electric generation and purchased power$803 $— $803 
Operation, maintenance and other474 10 484 
Depreciation and amortization432 — 432 
Property and other taxes102 — 102 
Interest expense200 — 200 
Income tax expense (benefit)53 (2)51 
Add: Other segment items(a)
61 — 61 
Segment income (loss) / Net income$521 $(8)$513 
Capital expenditures$1,019 $— $1,019 
Segment assets55,035 377 55,412 
Three Months Ended March 31, 2024
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$2,407 $— $2,407 
Less:
Fuel used in electric generation and purchased power$860 $— $860 
Operation, maintenance and other441 11 452 
Depreciation and amortization397 — 397 
Property and other taxes94 — 94 
Interest expense180 — 180 
Income tax expense (benefit)58 (2)56 
Add: Other segment items(a)
62 — 62 
Segment income (loss) / Net income$439 $(9)$430 
Capital expenditures$952 $— $952 
Segment assets52,487 205 52,692 
(a)    Other segment items include Gains on sales of other assets and other, net, and Other income and expenses, net.
Progress Energy
Progress Energy has one reportable segment, EU&I. The remainder of Progress Energy's operations is presented as Other.
Three Months Ended March 31, 2025
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$3,462 $5 $3,467 
Less:
Fuel used in electric generation and purchased power$1,106 $— $1,106 
Operation, maintenance and other673 15 688 
Depreciation and amortization631 — 631 
Property and other taxes172 — 172 
Interest expense246 29 275 
Income tax expense (benefit)118 (8)110 
Add: Other segment items(a)
61 — 61 
Segment income (loss) / Net income$577 $(31)$546 
Capital expenditures$1,409 $— $1,409 
Segment assets68,341 5,004 73,345 
Three Months Ended March 31, 2024
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$3,224 $4 $3,228 
Less:
Fuel used in electric generation and purchased power$1,143 $— $1,143 
Operation, maintenance and other616 12 628 
Depreciation and amortization587 — 587 
Property and other taxes157 1 158 
Interest expense231 29 260 
Income tax expense (benefit)95 (9)86 
Add: Other segment items(a)
61 8 69 
Segment income (loss) / Net income$456 $(21)$435 
Capital expenditures$1,373 $— $1,373 
Segment assets63,861 3,861 67,722 
(a)    Other segment items include Gains on sales of other assets and other, net, and Other income and expenses, net.
Duke Energy Progress
Duke Energy Progress has one reportable segment, EU&I. The remainder of Duke Energy Progress' operations is presented as Other.
Three Months Ended March 31, 2025
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$2,018 $— $2,018 
Less:
Fuel used in electric generation and purchased power$725 $— $725 
Operation, maintenance and other391 7 398 
Depreciation and amortization357 — 357 
Property and other taxes60 — 60 
Interest expense128 — 128 
Income tax expense (benefit)58 (2)56 
Add: Other segment items(a)
39 (2)37 
Segment income (loss) / Net income$338 $(7)$331 
Capital expenditures$849 $— $849 
Segment assets39,788 1,089 40,877 
Three Months Ended March 31, 2024
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$1,788 $— $1,788 
Less:
Fuel used in electric generation and purchased power$620 $— $620 
Operation, maintenance and other369 6 375 
Depreciation and amortization339 — 339 
Property and other taxes51 — 51 
Interest expense120 — 120 
Income tax expense (benefit)50 (2)48 
Add: Other segment items(a)
36 1 37 
Segment income (loss) / Net income$275 $(3)$272 
Capital expenditures$704 $— $704 
Segment assets37,390 104 37,494 
(a)    Other segment items include Gains on sales of other assets and other, net, and Other income and expenses, net.
Duke Energy Florida
Duke Energy Florida has one reportable segment, EU&I. The remainder of Duke Energy Florida's operations is presented as Other.
Three Months Ended March 31, 2025
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$1,444 $— $1,444 
Less:
Fuel used in electric generation and purchased power$381 $— $381 
Operation, maintenance and other282 4 286 
Depreciation and amortization274 — 274 
Property and other taxes112 — 112 
Interest expense118 — 118 
Income tax expense (benefit)60 (2)58 
Add: Other segment items(a)
22 (3)19 
Segment income (loss) / Net income$239 $(5)$234 
Capital expenditures$559 $— $559 
Segment assets28,553 187 28,740 
Three Months Ended March 31, 2024
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$1,436 $— $1,436 
Less:
Fuel used in electric generation and purchased power$523 $— $523 
Operation, maintenance and other247 4 251 
Depreciation and amortization248 — 248 
Property and other taxes106 — 106 
Interest expense111 — 111 
Income tax expense (benefit)45 (2)43 
Add: Other segment items(a)
25 — 25 
Segment income (loss) / Net income$181 $(2)$179 
Capital expenditures$669 $— $669 
Segment assets26,471 27 26,498 
(a)    Other segment items include Gains on sales of other assets and other, net, and Other income and expenses, net.
Duke Energy Ohio
Duke Energy Ohio has two reportable segments, EU&I and GU&I. The remainder of Duke Energy Ohio's operations is presented as Other.
Three Months Ended March 31, 2025
ElectricGasTotal
Utilities andUtilities andReportable
Eliminations/
(in millions)InfrastructureInfrastructureSegmentsOtherTotal
Total operating revenues
$487 $279 $766 $— $766 
Less:
Fuel used in electric generation and purchased power$149 $— $149 $— $149 
Cost of natural gas— 101 101 — 101 
Operation, maintenance and other92 29 121 3 124 
Depreciation and amortization76 36 112 — 112 
Property and other taxes86 30 116 — 116 
Interest expense31 16 47 — 47 
Income tax expense (benefit)9 14 23 (1)22 
Add: Other segment items(a)
4 2 6 (1)5 
Segment income (loss) / Net income
$48 $55 $103 $(3)$100 
Capital expenditures$157 $67 $224 $— $224 
Segment assets8,303 4,524 12,827 53 12,880 
Three Months Ended March 31, 2024
ElectricGasTotal
Utilities andUtilities andReportable
Eliminations/
(in millions)InfrastructureInfrastructureSegmentsOtherTotal
Total operating revenues
$458 $220 $678 $— $678 
Less:
Fuel used in electric generation and purchased power$138 $— $138 — $138 
Cost of natural gas— 61 61 — 61 
Operation, maintenance and other93 32 125 1 126 
Depreciation and amortization66 33 99 — 99 
Property and other taxes71 31 102 — 102 
Interest expense29 15 44 1 45 
Income tax expense (benefit)10 9 19 — 19 
Add: Other segment items(a)
4 2 6 — 6 
Segment income (loss) / Net income
$55 $41 $96 $(2)$94 
Capital expenditures$137 $80 $217 $— $217 
Segment assets7,935 4,350 12,285 20 12,305 
(a)    Other segment items for EU&I and GU&I include Gains on sales of other assets and other, net, and Other income and expenses, net.
Duke Energy Indiana
Duke Energy Indiana has one reportable segment, EU&I. The remainder of Duke Energy Indiana's operations is presented as Other.
Three Months Ended March 31, 2025
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$858 $— $858 
Less:
Fuel used in electric generation and purchased power$260 $— $260 
Operation, maintenance and other193 2 195 
Depreciation and amortization192 — 192 
Property and other taxes18 — 18 
Interest expense60 (1)59 
Income tax expense (benefit)18 — 18 
Add: Other segment items(a)
10 — 10 
Segment income (loss) / Net income$127 $(1)$126 
Capital expenditures$234 $— $234 
Segment assets15,782 8 15,790 
Three Months Ended March 31, 2024
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$759 $— $759 
Less:
Fuel used in electric generation and purchased power$271 $— $271 
Operation, maintenance and other178 2 180 
Depreciation and amortization169 — 169 
Property and other taxes14 — 14 
Interest expense57 — 57 
Income tax expense (benefit)14 — 14 
Add: Other segment items(a)
13 — 13 
Segment income (loss) / Net income$69 $(2)$67 
Capital expenditures$275 $— $275 
Segment assets14,921 19 14,940 
(a)    Other segment items include Gains on sales of other assets and other, net, and Other income and expenses, net.
Piedmont
Piedmont has one reportable segment, GU&I. The remainder of Piedmont's operations is presented as Other.
Three Months Ended March 31, 2025
Gas
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$857 $— $857 
Less:
Cost of natural gas$272 $— $272 
Operation, maintenance and other94 2 96 
Depreciation and amortization70 — 70 
Property and other taxes18 — 18 
Interest expense47 — 47 
Income tax expense (benefit)76 — 76 
Other Segment Items
Add: Equity in earnings of unconsolidated affiliates— 2 2 
Add: Other(a)
11 — 11 
Segment income (loss) / Net income$291 $— $291 
Capital expenditures$182 $— $182 
Segment assets11,818 91 11,909 
Three Months Ended March 31, 2024
Gas
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$676 $— $676 
Less:
Cost of natural gas$170 $— $170 
Operation, maintenance and other95 — 95 
Depreciation and amortization62 — 62 
Property and other taxes15 — 15 
Interest expense45 — 45 
Income tax expense (benefit)59 1 60 
Other Segment Items
Add: Equity in earnings of unconsolidated affiliates— 2 2 
Add: Other(a)
15 — 15 
Segment income (loss) / Net income$245 $1 $246 
Capital expenditures$294 $— $294 
Segment assets11,099 93 11,192 
(a)    Other includes Gains on sales of other assets and other, net, and Other income and expenses, net.
v3.25.1
Regulatory Matters
 3 Months Ended
Mar. 31, 2025
Regulated Operations [Abstract]  
Regulatory Matters REGULATORY MATTERS
RATE-RELATED INFORMATION
The NCUC, PSCSC, FPSC, IURC, PUCO, TPUC and KPSC approve rates for retail electric and natural gas services within their states. The FERC approves rates for electric sales to wholesale customers served under cost-based rates (excluding Ohio and Indiana), as well as sales of transmission service. The FERC also regulates certification and siting of new interstate natural gas pipeline projects. For open regulatory matters, unless otherwise noted, the Subsidiary Registrants and Duke Energy Kentucky cannot predict the outcome or ultimate resolution of their respective matters.
Duke Energy Carolinas and Duke Energy Progress
Hurricanes Debby and Helene
In 2024, hurricanes Debby and Helene significantly impacted the Duke Energy Carolinas and Duke Energy Progress territories in North Carolina and South Carolina. As of March 31, 2025, the total cumulative operations and maintenance expense incurred for restoration and rebuilding of infrastructure associated with the hurricanes was approximately $764 million ($554 million and $210 million for Duke Energy Carolinas and Duke Energy Progress, respectively). The reduction in cumulative operations and maintenance expense compared to December 31, 2024, of $58 million for Duke Energy Carolinas and $38 million for Duke Energy Progress, was recorded as a reduction in Regulatory assets within Other Noncurrent Assets on the Condensed Consolidated Balance Sheets. In addition, through March 31, 2025, there have been cumulative capital investments of $556 million ($404 million and $152 million for Duke Energy Carolinas and Duke Energy Progress, respectively) associated with the hurricanes. Amounts are net of expected insurance recoveries and could change going forward as storm restoration and rebuild work is finalized. Additional estimated capital costs of approximately $100 million is expected to be incurred through the first half of 2026 to rebuild the systems from hurricane damage.
North Carolina Storm Cost Securitization
In December 2024, Duke Energy Carolinas and Duke Energy Progress filed their joint petition for review and approval of storm recovery costs (Phase 1) with the NCUC to securitize the North Carolina-retail allocable share of storm costs associated with hurricanes Helene, Debby and Ian, as well as Hurricane Zeta and Winter Storm Izzy, and the establishment of storm reserves for $200 million at Duke Energy Carolinas and $100 million at Duke Energy Progress. On February 3, 2025, Duke Energy Carolinas and Duke Energy Progress filed their joint petition for financing orders (Phase 2). In February 2025, Duke Energy Carolinas and Duke Energy Progress reached a settlement agreement with the North Carolina Public Staff and other intervening parties that resolved all issues between the parties in the Phase 1 proceeding and removed the establishment of storm reserves from the securitization proceeding. Further, the settlement outlined agreement on certain issues in the Phase 2 proceeding. The evidentiary hearing for Phase 1 was held on February 13, 2025.
On April 16, 2025, the NCUC issued its Phase 1 order approving the settlement and determining that approximately $584 million for Duke Energy Carolinas and $461 million for Duke Energy Progress in storm recovery costs are reasonable and prudent and eligible for securitization. The order authorizes the companies to proceed to Phase 2 of the securitization process. On April 15, 2025, Duke Energy Carolinas and Duke Energy Progress filed a settlement with the North Carolina Public Staff resolving all remaining issues in Phase 2. The evidentiary hearing for Phase 2 was held on April 21, 2025, and a Phase 2 order is expected in June 2025. Subject to NCUC approval of Phase 2, Duke Energy Carolinas and Duke Energy Progress expect to securitize the North Carolina-retail allocable share of storm costs by the end of 2025.
South Carolinas Storm Cost Securitization
On March 21, 2025, Duke Energy Carolinas filed a petition for storm securitization with the PSCSC for authorization to finance the estimated South Carolina-retail allocable share of storm costs of $604 million primarily related to Hurricane Helene storm recovery activities and inclusive of funding $25 million related to storm reserves. On April 7, 2025, the PSCSC issued a procedural schedule, scheduling an evidentiary hearing in June 2025 and the issuance of a financing order by August 1, 2025. The petition assumes a November 30, 2025 bond issuance. Subject to PSCSC approval, Duke Energy Carolinas expects to securitize its South Carolina-retail allocable share of storm costs by the end of 2025. Due to the relatively low level of storm costs incurred by Duke Energy Progress in South Carolina, Duke Energy Progress will not seek to pursue securitization of those costs and has offset those costs against established storm reserve balances.
Duke Energy Carolinas
Oconee Subsequent License Renewal
On June 7, 2021, Duke Energy Carolinas filed a subsequent license renewal (SLR) application for Oconee with the NRC to renew the operating licenses. On March 31, 2025, the NRC issued the subsequent renewed licenses for Oconee, allowing an additional 20 years of operation to 2053 (units 1 and 2) and 2054 (unit 3).
2023 North Carolina Rate Case
In January 2023, Duke Energy Carolinas filed a performance-based regulation (PBR) application with the NCUC to request an increase in base rate retail revenues. The PBR application included a multiyear rate plan (MYRP) to recover projected capital investments during the three-year MYRP period. In addition to the MYRP, the PBR application included an Earnings Sharing Mechanism, Residential Decoupling Mechanism and Performance Incentive Mechanisms (PIMS) as required by HB 951.
In August 2023, Duke Energy Carolinas filed with the NCUC a partial settlement with the North Carolina Public Staff in connection with its PBR application. The partial settlement included, among other things, agreement on a substantial portion of the North Carolina retail rate base for the historic base case of approximately $19.5 billion and all of the capital projects and related costs to be included in the three-year MYRP, including $4.6 billion (North Carolina retail allocation) projected to go in service over the MYRP period. Additionally, the partial settlement included agreement, with certain adjustments, on depreciation rates, the recovery of grid improvement plan costs and PIMs, Tracking Metrics and the Residential Decoupling Mechanism under the PBR application. On August 28, 2023, Duke Energy Carolinas filed with the NCUC a second partial settlement with the North Carolina Public Staff resolving additional issues, including the future treatment of nuclear PTCs related to the IRA, through a stand-alone rider that would provide the benefits to customers. This stand-alone rider was effective in rates beginning January 1, 2025.
On December 15, 2023, the NCUC issued an order approving Duke Energy Carolinas' PBR application, as modified by the partial settlements and the order, including an overall retail revenue increase of $436 million in Year 1, $174 million in Year 2 and $158 million in Year 3, for a combined total of $768 million. The order established an ROE of 10.1% based upon an equity ratio of 53% and approved, with certain adjustments, depreciation rates and the recovery of grid improvement plan costs and certain deferred COVID-related costs. Additionally, the Residential Decoupling Mechanism and PIMs were approved as requested under the PBR application and revised by the partial settlements. Duke Energy Carolinas implemented interim rates on September 1, 2023. New revised Year 1 rates and the residential decoupling were implemented on January 15, 2024.
In February 2024, a number of parties filed Notices of Appeal of the December 15, 2023, NCUC order. Notices of Appeal were filed by the Carolina Industrial Group for Fair Utility Rates (CIGFUR) III, a collection of electric membership cooperatives (collectively, the EMCs), and the North Carolina Attorney General’s Office (the AGO). CIGFUR III and the EMCs appealed the interclass subsidy reduction percentage and the Transmission Cost Allocation stipulation. In addition, CIGFUR III appealed the NCUC’s elimination of the equal percentage fuel cost allocation methodology. The AGO appealed several issues including the authorized ROE and certain rate design and accounting matters. On March 1, 2024, Carolina Utility Customers Association, Inc. appealed several issues, including the authorized ROE and certain rate design and accounting matters. In July 2024, the Supreme Court of North Carolina consolidated these appeals with the parallel appeals of the NCUC's order regarding the Duke Energy Progress PBR application. Briefing is complete and oral arguments occurred on February 13, 2025. Duke Energy Carolinas anticipates a decision to be issued no later than the fourth quarter of 2025.
Duke Energy Progress
2022 North Carolina Rate Case
In October 2022, Duke Energy Progress filed a PBR application with the NCUC to request an increase in base rate retail revenues. The rate request before the NCUC included an MYRP to recover projected capital investments during the three-year MYRP period. In addition to the MYRP, the PBR application included an Earnings Sharing Mechanism, Residential Decoupling Mechanism and PIMs as required by HB 951.
In April 2023, Duke Energy Progress filed with the NCUC a partial settlement with North Carolina Public Staff, which included agreement on many aspects of Duke Energy Progress' three-year MYRP proposal. In May 2023, CIGFUR II joined this partial settlement and North Carolina Public Staff and CIGFUR II filed a separate settlement reaching agreement on PIMs, Tracking Metrics and the Residential Decoupling Mechanism under the PBR application.
On August 18, 2023, the NCUC issued an order approving Duke Energy Progress' PBR application, as modified by the partial settlements and the order, including an overall retail revenue increase of $233 million in Year 1, $126 million in Year 2 and $135 million in Year 3, for a combined total of $494 million. Key aspects of the order include the approval of North Carolina retail rate base for the historic base case of approximately $12.2 billion and capital projects and related costs to be included in the three-year MYRP, including $3.5 billion (North Carolina retail allocation) projected to go in service over the MYRP period. The order established an ROE of 9.8% based upon an equity ratio of 53% and approved, with certain adjustments, depreciation rates and the recovery of grid improvement plan costs and certain deferred COVID-related costs. Additionally, the Residential Decoupling Mechanism and PIMs were approved as requested under the PBR application and revised by the partial settlements. Duke Energy Progress implemented interim rates on June 1, 2023, and implemented revised Year 1 rates and the residential decoupling on October 1, 2023.
In October 2023, CIGFUR II and Haywood Electric Membership Corporation each filed a Notice of Appeal of the August 18, 2023 NCUC order. Both parties are appealing certain matters that do not impact the overall revenue requirement in the rate case. Specifically, they appealed the interclass subsidy reduction percentage, and CIGFUR II also appealed the Customer Assistance Program and the equal percentage fuel cost allocation methodology. In November 2023, the AGO filed a Notice of Cross Appeal of the NCUC's determination regarding the exclusion of electric vehicle revenue from the residential decoupling mechanism. In November 2023, Duke Energy Progress, the North Carolina Public Staff, CIGFUR II, and a number of other parties reached a settlement pursuant to which CIGFUR II agreed not to pursue its appeal of the Customer Assistance Program. In July 2024, the Supreme Court of North Carolina consolidated these appeals with the parallel appeals of the NCUC's order regarding the Duke Energy Carolinas PBR application. Briefing is complete and oral arguments occurred in February 2025. Duke Energy Progress anticipates a decision to be issued no later than the fourth quarter of 2025.
Person County Combined Cycle CPCN
On February 7, 2025, Duke Energy Progress filed with the NCUC its application to construct and operate a second 1,360-MW hydrogen-capable, advanced-class CC unit in Person County at the Roxboro Plant. NCEMC has also notified Duke Energy Progress of NCEMC's intent to co-own approximately 225 MW of the second CC and Duke Energy Progress and NCEMC plan to begin negotiations on the contractual arrangement in the second quarter of 2025. NCEMC has the right to co-own the facility under its existing supply agreement with Duke Energy Progress. Pending regulatory approvals, construction of the second CC is planned to start in 2026 with the unit targeted to be placed in service by the end of 2029. As part of the application, Duke Energy Progress noted that the recovery of Construction Work in Progress during the construction period for the proposed facility may be pursued in a future rate case. The 2030 North Carolina retail revenue requirement for the proposed facility is estimated to be $113 million, representing an approximate average retail rate increase of 2.6% across all classes. The air permit issued by the NCDEQ in December 2024, also pertains to the second CC. An evidentiary hearing related to the CPCN is scheduled to begin on July 22, 2025. An order is expected by the end of 2025.
Robinson Subsequent License Renewal
On April 8, 2025, Duke Energy Progress filed an SLR application for Robinson with the NRC to renew Robinson’s operating license for an additional 20 years. The SLR would extend operations of the facility from 60 to 80 years. The current license expires in 2030.
Duke Energy Florida
Clean Energy Connection
In July 2020, Duke Energy Florida petitioned the FPSC for approval of a voluntary solar program consisting of 10 new solar generating facilities with combined capacity of 749 MW. The FPSC approved the program in January 2021, allowing participants to support cost-effective solar development in Florida by paying a subscription fee based on per kilowatt subscriptions and receiving a credit on their bill based on the actual generation associated with their portion of the solar portfolio. The 10 new solar generation facilities were completed and all of the remaining sites were in service by the end of 2024 at a cost of approximately $1.1 billion. These investments are included in base rates offset by the revenue from the subscription fees, with credits included in the fuel cost recovery clause.
In February 2021, the League of United Latin American Citizens (LULAC) filed a notice of appeal of the FPSC’s order approving the Clean Energy Connection to the Supreme Court of Florida. The Supreme Court of Florida heard oral arguments in the appeal in February 2022. On May 27, 2022, the Supreme Court of Florida issued an order remanding the case back to the FPSC so that the FPSC can amend its order to better address some of the arguments raised by LULAC. In September 2022, the FPSC issued a revised order and submitted it to the Supreme Court of Florida. The Supreme Court of Florida requested that the parties file supplemental briefs regarding the revised order, which were filed in February 2023. LULAC has filed a request for Oral Argument on the issues discussed in the supplemental briefs, but the court has yet to rule on that request. The FPSC approval order remains in effect pending the outcome of the appeal.
Storm Protection Plan
At least every three years, Duke Energy Florida must file a Storm Protection Plan (SPP) with the FPSC. Each plan covers a 10-year period and includes investments in transmission and distribution meant to strengthen infrastructure, reduce outage times associated with extreme weather events, reduce restoration costs and improve overall service reliability. In April 2022, Duke Energy Florida filed an SPP for approval with the FPSC for the 2023-2032 time frame. The plan reflected approximately $7 billion of capital investment in transmission and distribution. The evidentiary hearing began in August 2022. In October 2022, the FPSC approved Duke Energy Florida’s plan with one modification to remove the transmission loop radially fed program, representing a reduction of approximately $80 million over the 10-year period starting in 2025. In December 2022, the OPC filed a notice of appeal of this order to the Florida Supreme Court and briefs were filed by the OPC and Duke Energy Florida during 2023. On November 14, 2024, the Florida Supreme Court issued an order upholding the FPSC's approval of Duke Energy Florida's plan.
In January 2025, Duke Energy Florida filed an SPP for approval with the FPSC for the 2026-2035 time frame reflecting approximately $7 billion of capital investment in transmission and distribution. On March 12, 2025, the OPC filed testimony recommending that the pace of the proposed spend be reduced, as well as challenging three subprograms in Duke Energy Florida's SPP. Duke Energy Florida filed rebuttal testimony on April 2, 2025, requesting that the FPSC approve its SPP as filed. The FPSC must approve, with or without modification, or deny the plan no later than July 15, 2025. A hearing has been scheduled to begin May 20, 2025.
Hurricanes Debby, Helene and Milton
In 2024, Hurricane Debby (Category 1 storm), Hurricane Helene (Category 4 storm) and Hurricane Milton (Category 3 storm) made landfall in Florida and caused significant damage. Duke Energy Florida has certain existing storm reserve regulatory liability amounts, which are applied to the recovery of storm costs. The storm reserve amount was approximately $63 million as of July 31, 2024, prior to the damage resulting from hurricanes Debby, Helene and Milton. Duke Energy Florida is permitted to petition the FPSC for recovery of incremental operation and maintenance costs resulting from the storms and to replenish the retail customer storm reserve to approximately $132 million.
In December 2024, Duke Energy Florida filed its petition to recover the estimated costs incurred to respond to all three storms, including replenishment of the storm reserve, seeking recovery of approximately $1.1 billion over 12 months beginning with the first billing cycle in March 2025. Approximately $813 million and $936 million of the operation and maintenance expenses, net of storm reserves, are deferred in Regulatory assets within Current assets as of March 31, 2025, and December 31, 2024, respectively. Approximately $74 million of capital related to these storms will be sought for recovery in future base rate case filings. On February 4, 2025, the FPSC voted to approve Duke Energy Florida's request for recovery of these estimated storm costs as filed, subject to true-up after the actual costs are filed. New rates were effective March 1, 2025.
Duke Energy Ohio
Duke Energy Ohio Natural Gas Base Rate Case
In June 2022, Duke Energy Ohio filed a natural gas base rate case application with the PUCO. The drivers for this case were capital invested since Duke Energy Ohio's last natural gas base rate case in 2012. Duke Energy Ohio also sought to adjust the caps on its Capital Expenditure Program (CEP) rider. In April 2023, Duke Energy Ohio filed a stipulation with all parties to the case except the OCC. In the stipulation, the parties agreed to approximately $32 million in revenue increases with an equity ratio of 52.32% and an ROE of 9.6%, and adjustments to the CEP Rider caps. The stipulation was opposed by the OCC at an evidentiary hearing that concluded in May 2023. On November 1, 2023, PUCO issued an order approving the stipulation as filed and new rates went into effect November 1, 2023. In December 2023, the OCC filed an application for rehearing and the PUCO granted OCC's application for rehearing for further consideration of issues raised. As a result of a Supreme Court of Ohio decision regarding procedural issues related to applications for rehearing, PUCO denied OCC’s rehearing request. In October 2024, the OCC filed its Notice of Appeal with the Ohio Supreme Court. The case is fully briefed, and oral argument is expected to be scheduled to occur during the third quarter of 2025.
Duke Energy Ohio Electric Security Plan
In April 2024, Duke Energy Ohio filed with the PUCO a request for an Electric Security Plan (ESP). The ESP application proposed a three-year term from June 1, 2025, through May 31, 2028, and included continuation of market-based rates for generation supply through competitive procurement processes and continuation and expansion of existing rider mechanisms. Duke Energy Ohio proposed a new rider mechanism relating to electric distribution infrastructure modernization programs, which may be enabled by and partially funded through federal or state funding opportunities, as well as future battery storage projects and two electric vehicle programs. Additional proposals included new rider mechanisms related to solar for all investments for low-income and disadvantaged communities, low-income senior citizen bill assistance, and energy efficiency (EE) and demand-side management programs.
In November 2024, Duke Energy Ohio filed a stipulation that the majority of the intervenors signed as either signatory or non-opposing parties. The stipulation includes the continuation of market-based customer rates for generation supply through competitive procurement auctions and the continuation of all existing riders. It further establishes new caps for certain riders. Duke Energy Ohio also agreed to withdraw its proposals for an infrastructure modernization rider, battery storage projects and electric vehicle programs. The stipulation includes a residential EE program with provisions for low-income customers. The evidentiary hearing concluded in January 2025 and the case was fully briefed on March 14, 2025.
On April 30, 2025, Ohio Substitute House Bill 15 (HB 15) was passed and sent to the governor of Ohio. HB 15 will be effective 90 days after approval by the governor or the expiration of a 10-day review period if the governor takes no action. Duke Energy Ohio anticipates HB 15 will become law by August 10, 2025. HB 15 requires electric distribution utilities to file a base rate case every three years, commencing no later than December 31, 2029, and establishes an opportunity to apply for approval of a three-year rate plan with forward-looking test periods to mitigate regulatory lag. HB 15 eliminates ESPs and certain distribution-related riders, but permits ESPs approved as of the effective date of HB 15 to remain in place through the end of their authorized term. HB 15 also eliminates Duke Energy Ohio's Legacy Generation Rider (LGR) upon the effective date of HB 15 and prevents the PUCO from future reauthorization of similar arrangements. As a result of HB 15, any future losses related to Duke Energy Ohio's Inter-Company Power Agreement with OVEC will not be recoverable from retail customers. Additionally, regulatory assets related to OVEC at the time of HB 15 becoming effective may not be recoverable. Regulatory assets related to OVEC were $24 million and $30 million as of March 31, 2025, and December 31, 2024, respectively.
Duke Energy Kentucky 2022 Electric Base Rate Case
In December 2022, Duke Energy Kentucky filed a rate case with the KPSC driven by capital investments to strengthen the electricity generation and delivery systems along with adjusted depreciation rates for the East Bend and Woodsdale Combustion Turbine (CT) generation stations. Duke Energy Kentucky also requested approval for new programs and tariff updates, including a voluntary community-based renewable subscription program and two electric vehicle charging programs. The KPSC issued an order on October 12, 2023, including a $48 million increase in base revenues, an ROE of 9.75% for electric base rates and 9.65% for electric riders and an equity ratio of 52.145%. New rates went into effect October 13, 2023. Duke Energy Kentucky's request to align the depreciation rates of East Bend with a 2035 retirement date was denied and the KPSC ordered depreciation rates with a 2041 retirement date for the unit. The KPSC did approve the request to align the depreciation rates of Woodsdale CT with a 2040 retirement date and denied the voluntary community-based renewable subscription program and the two electric vehicle charging programs.
In November 2023, Duke Energy Kentucky filed for rehearing requesting certain matters be reconsidered by the KPSC and the KPSC granted in part and denied in part Duke Energy Kentucky's request for rehearing. On July 1, 2024, the KPSC issued its final order on rehearing, ruling in Duke Energy Kentucky's favor on nearly all issues. However, the KPSC ordered Duke Energy Kentucky to refund alleged over collections since the KPSC order on October 12, 2023. On July 10, 2024, the KPSC issued an order correcting the base fuel rate used to calculate new base rates in its July 1, 2024 order and its calculation of Duke Energy Kentucky's Street Lighting Rate. New rates were implemented in August 2024.
On December 14, 2023, Duke Energy Kentucky filed an appeal with the Franklin County Circuit Court on certain matters for which the KPSC denied rehearing, specifically as it relates to including decommissioning costs in depreciation rates for East Bend and Woodsdale. Duke Energy Kentucky and Appellee briefs were filed in 2024.
Duke Energy Kentucky 2024 Electric Base Rate Case
In December 2024, Duke Energy Kentucky filed a base rate case with the KPSC requesting an annualized increase in electric base rates of approximately $70 million and an ROE of 10.85% with an equity ratio of 52.728%. This is an overall increase of approximately 14.7%. The request for the rate increase is driven by capital investments to strengthen the electricity generation and delivery systems. New rates are anticipated to go into effect around July 2, 2025. An evidentiary hearing is scheduled to begin on May 21, 2025.
Duke Energy Indiana
Indiana Coal Ash Recovery
In Duke Energy Indiana’s 2019 rate case, the IURC also opened a subdocket for post-2018 coal ash related expenditures. Duke Energy Indiana filed testimony in April 2020, in the coal ash subdocket requesting recovery for the post-2018 coal ash basin closure costs for plans that have been approved by the Indiana Department of Environmental Management (IDEM) as well as continuing deferral, with carrying costs, on the balance of such coal ash basin closure costs. On November 3, 2021, the IURC issued an order allowing recovery for post-2018 coal ash basin closure costs for the plans that have been approved by IDEM, as well as continuing deferral, with carrying costs, on the balance. The OUCC and the Duke Industrial Group appealed. The Indiana Court of Appeals issued its opinion on February 21, 2023, reversing the IURC's order to the extent that it allowed Duke Energy Indiana to recover federally mandated costs incurred prior to the IURC's November 3, 2021 order. In addition, the court found that any costs incurred pre-petition to determine federally mandated compliance options were not specifically authorized by the statute and should also be disallowed.
In 2023, Duke Energy Indiana filed its proposal to remove from rates certain costs incurred prior to the IURC's November 3, 2021 order date. On September 20, 2023, the IURC approved Duke Energy Indiana's proposal to remove the costs from its rates and assessed simple interest of the refunds of 4.71%, beginning from when the costs were initially recovered from customers. Duke Energy Indiana included a request to recover the pre-order costs denied by the Indiana Court of Appeals and certain future coal ash closure costs as part of depreciation costs in the 2024 Indiana Rate Case.
In 2023, Duke Energy Indiana filed a petition under the amended version of the federal mandate statute for additional post-2018 coal ash closure costs for the remaining basins not included in the Indiana coal ash recovery case from 2020. On May 8, 2024, the IURC issued a CPCN and approved these coal ash related compliance projects as federally mandated compliance projects. In June 2024, the Citizens Action Coalition of Indiana (CAC) filed a motion to appeal the IURC order granting the coal ash CPCN proceeding and approving the coal ash related compliance projects. Briefing was completed in January 2025, and Duke Energy Indiana is awaiting an opinion from the appellate court.
TDSIC 2.0
In November 2021, Duke Energy Indiana filed for approval of the Transmission, Distribution, Storage Improvement Charge 2.0 investment plan for 2023-2028 (TDSIC 2.0). On June 15, 2022, the IURC approved, without modification, TDSIC 2.0, which includes approximately $2 billion in transmission and distribution investments selected to improve customer reliability, harden and improve resiliency of the grid, enable expansion of renewable and distributed energy projects and encourage economic development. In July 2022, the OUCC filed a notice of appeal to the Indiana Court of Appeals in Duke Energy Indiana’s TDSIC 2.0 proceeding. The Indiana Court of Appeals issued its opinion on March 9, 2023, affirming the IURC’s order in its entirety. The Duke Industrial Group filed a petition to transfer to the Indiana Supreme Court. On December 19, 2024, the Indiana Supreme Court affirmed the Indiana Court of Appeals decision, concluding there was substantial evidence that the IURC's conclusion was reasonable and the TDSIC 2.0 plan met the statutory requirements. On January 21, 2025, the Duke Industrial Group filed a motion for rehearing. On March 4, 2025, the Indiana Supreme Court denied the Duke Industrial Group's petition for rehearing. There can be no further appeals on TDSIC 2.0 and this matter is now fully resolved.
2024 Indiana Rate Case
In April 2024, Duke Energy Indiana filed an application with the IURC for a rate increase of $492 million, representing an overall average bill increase of approximately 16.2%, which, if approved, would be added to retail customer bills in two steps, approximately 11.7% in 2025 and approximately 4.5% in 2026. Duke Energy Indiana requested an ROE of 10.5% with an equity ratio of 53%. The rate increase is driven by $1.6 billion in investments made since the last general rate case filed in 2019 in order to reliably serve customers, improve resiliency of the system, and advance environmental sustainability.
An order for the rate case was issued by the IURC on January 29, 2025, and revised February 3, 2025, which authorized an ROE of 9.75%, an equity ratio of 53% and an annual revenue increase of $296 million. Based on review of these orders, Duke Energy Indiana identified an inconsistency in the calculation of operating revenues before the effect of trackers. On February 7, 2025, Duke Energy Indiana made a compliance filing in accordance with the IURC's findings in its order and addressed the identified inconsistencies. The compliance filing also clarified the annual revenue increase was approximately $385 million. Additionally, on February 18, 2025, one industrial customer submitted a filing requesting the IURC to clarify its revenue allocation in these proceedings, which was denied by the Commission on April 16, 2025. On February 25, 2025, the IURC approved Duke Energy Indiana’s compliance filing and new rates were implemented February 27, 2025. The industrial customer filed a notice of appeal on February 28, 2025, regarding cost of service allocation. On April 9, 2025, the IURC issued an order correcting its January 29, 2025 order to apply a rate migration adjustment to industrial customers. An industrial customer appealed the IURC order to the Indiana Court of Appeals, but this appeal has been stayed.
Cayuga Combined Cycle CPCN
On February 13, 2025, Duke Energy Indiana filed for a CPCN seeking approval to construct two 1x1 CC natural gas-fired units with a combined winter rating of 1,476 MW. The Cayuga CC Project is proposed to be constructed on the same site as the retiring Cayuga coal-fired steam units with a winter rating of 1,005 MW. The Cayuga CC Project will result in an incremental 471 MW for the Duke Energy Indiana system and will allow Duke Energy Indiana to avoid expected maintenance and environmental compliance costs needed for the coal units to continue operating. The estimated cost of the Cayuga CC project is approximately $3 billion, plus AFUDC and project reserves. Duke Energy Indiana has proposed recovery of certain facility costs during construction, including AFUDC, through construction work in progress ratemaking via a proposed generation cost adjustment tracker mechanism. The estimated average retail rate impact during construction and initial in-service periods from April 2026 through May 2031 is approximately 5.4%. Duke Energy Indiana expects CC 1 to be placed in service in 2029 and CC 2 to be placed in service in 2030. A final air permit was issued by IDEM on March 5, 2025. An evidentiary hearing related to the CPCN is scheduled to begin on June 19, 2025. An order is expected by October 2025.
v3.25.1
Commitments and Contingencies
 3 Months Ended
Mar. 31, 2025
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies COMMITMENTS AND CONTINGENCIES
ENVIRONMENTAL
The Duke Energy Registrants are subject to federal, state and local regulations regarding air and water quality, hazardous and solid waste disposal, coal ash and other environmental matters. These regulations can be changed from time to time, imposing new obligations on the Duke Energy Registrants. The following environmental matters impact all Duke Energy Registrants.
Remediation Activities
In addition to Asset Retirement Obligations recorded as a result of various environmental regulations, the Duke Energy Registrants are responsible for environmental remediation at various sites. These include certain properties that are part of ongoing operations and sites formerly owned or used by Duke Energy entities. These sites are in various stages of investigation, remediation and monitoring. Managed in conjunction with relevant federal, state and local agencies, remediation activities vary based on site conditions and location, remediation requirements, complexity and sharing of responsibility. If remediation activities involve joint and several liability provisions, strict liability, or cost recovery or contribution actions, the Duke Energy Registrants could potentially be held responsible for environmental impacts caused by other potentially responsible parties and may also benefit from insurance policies or contractual indemnities that cover some or all cleanup costs. Liabilities are recorded when losses become probable and are reasonably estimable. The total costs that may be incurred cannot be estimated because the extent of environmental impact, allocation among potentially responsible parties, remediation alternatives and/or regulatory decisions have not yet been determined at all sites. Additional costs associated with remediation activities are likely to be incurred in the future and could be significant. Costs are typically expensed as Operation, maintenance and other on the Condensed Consolidated Statements of Operations unless regulatory recovery of the costs is deemed probable.
The following table contains information regarding reserves for probable and estimable costs related to the various environmental sites. These reserves are recorded in Accounts Payable within Other Current Liabilities and Other within Other Noncurrent Liabilities on the Condensed Consolidated Balance Sheets.
(in millions)March 31, 2025December 31, 2024
Reserves for Environmental Remediation
Duke Energy$68 $73 
Duke Energy Carolinas24 24 
Progress Energy19 19 
Duke Energy Progress9 9 
Duke Energy Florida10 10 
Duke Energy Ohio16 21 
Duke Energy Indiana2 2 
Piedmont6 7 
Additional losses in excess of recorded reserves that could be incurred for the stages of investigation, remediation and monitoring for environmental sites that have been evaluated at this time are not material.
LITIGATION
For open litigation, unless otherwise noted, Duke Energy and the Subsidiary Registrants cannot predict the outcome or ultimate resolution of their respective matters.
Duke Energy
Mooresville Coal Ash Class Action Litigation
On December 20, 2024, 15 plaintiffs filed a lawsuit in Iredell County, North Carolina, against Duke Energy (Parent), Duke Energy Carolinas and Duke Energy Progress (collectively “Duke Energy”) on behalf of a putative class alleging past and ongoing environmental contamination in the Mooresville area of North Carolina. The lawsuit alleges that Duke Energy disposed of and sold coal ash as structural fill resulting in the contamination of soil, groundwater and Lake Norman. Plaintiffs claim that Duke Energy failed to properly remediate the contamination and continues to pollute, and they assert that the contamination has negatively impacted property values and led to elevated cancer rates and other health issues. The complaint asserts claims for negligence, nuisance, violations of the North Carolina Unfair and Deceptive Trade Practices Act, strict liability for ultra-hazardous activities and trespass. Plaintiffs are seeking unspecified compensatory and punitive damages, injunctive relief to stop further contamination, remediation of contaminated areas and attorneys' fees and costs. Duke Energy filed its Motion to Dismiss on March 7, 2025.
Duke Energy Carolinas
NTE Carolinas II, LLC Litigation
In November 2017, Duke Energy Carolinas entered into a standard FERC large generator interconnection agreement (LGIA) with NTE Carolinas II, LLC (NTE), a company that proposed to build a combined-cycle natural gas plant in Rockingham County, North Carolina. In September 2019, Duke Energy Carolinas filed a lawsuit in Mecklenburg County Superior Court against NTE for breach of contract, alleging that NTE's failure to pay benchmark payments for Duke Energy Carolinas' transmission system upgrades required under the interconnection agreement constituted a termination of the interconnection agreement. Duke Energy Carolinas sought a monetary judgment against NTE because NTE failed to make multiple milestone payments. The lawsuit was moved to federal court in North Carolina. NTE filed a motion to dismiss Duke Energy Carolinas’ complaint and brought counterclaims alleging anti-competitive conduct and violations of state and federal statutes. Duke Energy Carolinas filed a motion to dismiss NTE's counterclaims. Both NTE's and Duke Energy Carolinas' motions to dismiss were subsequently denied by the court.
On May 21, 2020, in response to a NTE petition challenging Duke Energy Carolinas' termination of the LGIA, FERC issued a ruling that 1) it has exclusive jurisdiction to determine whether a transmission provider may terminate an LGIA; 2) FERC approval is required to terminate a conforming LGIA if objected to by the interconnection customer; and 3) Duke Energy may not announce the termination of a conforming LGIA unless FERC has approved the termination. FERC's Office of Enforcement also initiated an investigation of Duke Energy Carolinas into matters pertaining to the LGIA. In April 2023, Duke Energy Carolinas received notice from the FERC Office of Enforcement that they have closed their non-public investigation with no further action recommended.
Following completion of discovery, Duke Energy Carolinas filed a motion for summary judgment seeking a ruling in its favor as to some of its affirmative claims against NTE and to all of NTE’s counterclaims. On June 24, 2022, the court issued an order partially granting Duke Energy Carolinas' motion by dismissing NTE's counterclaims that Duke Energy Carolinas engaged in anti-competitive behavior in violation of state and federal statutes. In October 2022, the parties executed a settlement agreement with respect to the remaining breach of contract claims in the litigation and a Stipulation of Dismissal was filed with the court.
In November 2022, NTE filed its Notice of Appeal to the U.S. Court of Appeals for the Fourth Circuit as to the district court's summary judgment ruling in Duke Energy Carolinas' favor on NTE's antitrust and unfair competition claims. On August 5, 2024, the U.S. Court of Appeals for the Fourth Circuit reversed the district court's grant of summary judgment and remanded the case back to the district court for further proceedings. In August 2024, Duke Energy Carolinas filed a petition for rehearing, which was denied on November 26, 2024. On February 21, 2025, Duke Energy Carolinas filed a petition seeking review by the United States Supreme Court.
Asbestos-related Injuries and Damages Claims
Duke Energy Carolinas has experienced numerous claims for indemnification and medical cost reimbursement related to asbestos exposure. These claims relate to damages for bodily injuries alleged to have arisen from exposure to or use of asbestos in connection with construction and maintenance activities conducted on its electric generation plants prior to 1985.
Duke Energy Carolinas has recognized asbestos-related reserves of $387 million at March 31, 2025, and $396 million at December 31, 2024. These reserves are classified in Other within Other Noncurrent Liabilities and Other within Current Liabilities on the Condensed Consolidated Balance Sheets. These reserves are based on Duke Energy Carolinas' best estimate for current and future asbestos claims through 2044 and are recorded on an undiscounted basis. In light of the uncertainties inherent in a longer-term forecast, management does not believe they can reasonably estimate the indemnity and medical costs that might be incurred after 2044 related to such potential claims. It is possible Duke Energy Carolinas may incur asbestos liabilities in excess of the recorded reserves.
Duke Energy Carolinas has third-party insurance to cover certain losses related to asbestos-related injuries and damages above an aggregate self-insured retention. Receivables for insurance recoveries were $539 million at March 31, 2025, and December 31, 2024. These amounts are classified in Other within Other Noncurrent Assets and Receivables within Current Assets on the Condensed Consolidated Balance Sheets. Any future payments up to the policy limit will be reimbursed by the third-party insurance carrier. Duke Energy Carolinas is not aware of any uncertainties regarding the legal sufficiency of insurance claims. Duke Energy Carolinas believes the insurance recovery asset is probable of recovery as the insurance carrier continues to have a strong financial strength rating.
The reserve for credit losses for insurance receivables is $9 million as of March 31, 2025, and December 31, 2024, for both Duke Energy and Duke Energy Carolinas. The insurance receivable is evaluated based on the risk of default and the historical losses, current conditions and expected conditions around collectability. Management evaluates the risk of default annually based on payment history, credit rating and changes in the risk of default from credit agencies.
Duke Energy Indiana
Coal Ash Insurance Coverage Litigation
In June 2022, Duke Energy Indiana filed a civil action in Indiana Superior Court against various insurance companies seeking declaratory relief with respect to insurance coverage for coal combustion residuals-related expenses and liabilities covered by third-party liability insurance policies. The insurance policies cover the 1969-1972 and 1984-1985 periods and provide third-party liability insurance for claims and suits alleging property damage, bodily injury and personal injury (or a combination thereof). In June 2024, Duke Energy Indiana filed an amended complaint adding several additional insurance companies as defendants to the litigation. A trial date has not yet been set.
In 2023, Duke Energy Indiana and Associated Electric and Gas Insurance Services (AEGIS) reached a confidential settlement, the results of which were not material to Duke Energy, and as a result, AEGIS was dismissed from the litigation. Duke Energy Indiana has also reached confidential settlements with all the other various insurance companies, the results of which were not material to Duke Energy. The litigation will be dismissed once all remaining settlements are documented and paid, which is anticipated by the end of the second quarter of 2025. Duke Energy Indiana has proposed to credit retail customers with their proportionate share of coal ash insurance settlement proceeds, net of related expenses, over a two-year period anticipated to begin in the third quarter of 2025.
Other Litigation and Legal Proceedings
The Duke Energy Registrants are involved in other legal, tax and regulatory proceedings arising in the ordinary course of business, some of which involve significant amounts. The Duke Energy Registrants believe the final disposition of these proceedings will not have a material effect on their results of operations, cash flows or financial position. Reserves are classified on the Condensed Consolidated Balance Sheets in Other within Other Noncurrent Liabilities and Other within Current Liabilities.
OTHER COMMITMENTS AND CONTINGENCIES
General
As part of their normal business, the Duke Energy Registrants are party to various financial guarantees, performance guarantees and other contractual commitments to extend guarantees of credit and other assistance to various subsidiaries, investees and other third parties. These guarantees involve elements of performance and credit risk, which are not fully recognized on the Condensed Consolidated Balance Sheets and have uncapped maximum potential payments. However, the Duke Energy Registrants do not believe these guarantees will have a material effect on their results of operations, cash flows or financial position.
In addition, the Duke Energy Registrants enter into various fixed-price, noncancelable commitments to purchase or sell power or natural gas, take-or-pay arrangements, transportation, or throughput agreements and other contracts that may or may not be recognized on their respective Condensed Consolidated Balance Sheets. Some of these arrangements may be recognized at fair value on their respective Condensed Consolidated Balance Sheets if such contracts meet the definition of a derivative and the NPNS exception does not apply. In most cases, the Duke Energy Registrants’ purchase obligation contracts contain provisions for price adjustments, minimum purchase levels and other financial commitments.
v3.25.1
Debt and Credit Facilities
 3 Months Ended
Mar. 31, 2025
Debt Disclosure [Abstract]  
Debt and Credit Facilities DEBT AND CREDIT FACILITIES
SUMMARY OF SIGNIFICANT DEBT ISSUANCES
The following table summarizes significant debt issuances (in millions).
Three Months Ended March 31, 2025
DukeDuke
MaturityInterestDukeEnergyEnergy
Issuance DateDateRateEnergyCarolinasProgress
First Mortgage Bonds
January 2025(a)
March 2030
4.85 %$400 $400 $— 
January 2025(a)
March 2035
5.25 %700 700 — 
March 2025(b)
March 2027
4.35 %500 — 500 
March 2025(b)
March 2035
5.05 %850 — 850 
March 2025(b)
March 2055
5.55 %750 — 750 
Total issuances$3,200 $1,100 $2,100 
(a)Proceeds were used to pay off the $500 million DERF accounts receivable securitization facility due January 2025, to pay off short-term debt and for general company purposes.
(b)Proceeds were used to pay off the $400 million DEPR accounts receivable securitization facility due April 2025, to pay off short-term debt and for general company purposes.
CURRENT MATURITIES OF LONG-TERM DEBT
The following table shows the significant components of Current maturities of long-term debt on the Condensed Consolidated Balance Sheets. The Duke Energy Registrants currently anticipate satisfying these obligations with cash on hand and proceeds from additional borrowings.
(in millions)Maturity DateInterest RateMarch 31, 2025
Unsecured Debt
Duke Energy (Parent)April 20253.364 %$420 
Duke Energy (Parent)April 20253.950 %250 
Duke Energy OhioJune 20256.900 %150 
Duke Energy (Parent)September 20250.900 %650 
Piedmont
September 20253.600 %150 
Duke Energy Florida Term Loan Facility(a)
October 20255.068 %800 
Duke Energy Ohio(b)
October 20253.230 %95 
Duke Energy (Parent)December 20255.000 %500 
First Mortgage Bonds
Duke Energy Florida(a)(c)
October 2073
4.282 %200 
Duke Energy Florida(a)(c)
April 20744.282 %173 
Duke Energy ProgressAugust 20253.250 %500 
Other(d)
292 
Current maturities of long-term debt$4,180 
(a)Debt has a floating interest rate.
(b)Current maturity relates to Duke Energy Kentucky.
(c)These first mortgage bonds are classified as Current maturities of long-term debt on the Condensed Consolidated Balance Sheets based on terms of the indentures, which could require repayment in less than 12 months if exercised by the bondholders.
(d)Includes finance lease obligations, amortizing debt, tax-exempt bonds with mandatory put options and small bullet maturities.
AVAILABLE CREDIT FACILITIES
Master Credit Facility
In March 2025, Duke Energy extended the termination date of its existing Master Credit Facility to March 2030 and increased its capacity from $9 billion to $10 billion. The Duke Energy Registrants, excluding Progress Energy, have borrowing capacity under the Master Credit Facility up to a specified sublimit for each borrower. Duke Energy has the unilateral ability at any time to increase or decrease the borrowing sublimits of each borrower, subject to a maximum sublimit for each borrower. The amount available under the Master Credit Facility has been reduced to backstop issuances of commercial paper, certain letters of credit and variable-rate demand tax-exempt bonds that may be put to the Duke Energy Registrants at the option of the holder.
The table below includes the current borrowing sublimits and available capacity under these credit facilities.
March 31, 2025
DukeDukeDukeDukeDukeDuke
DukeEnergyEnergyEnergyEnergyEnergyEnergy
(in millions)Energy(Parent)CarolinasProgressFloridaOhioIndianaPiedmont
Facility size(a)
$10,000 $2,525 $1,300 $1,675 $1,425 $1,075 $950 $1,050 
Reduction to backstop issuances
Commercial paper(b)
(2,103)(1,381)(300)(150)— (52)(152)(68)
Outstanding letters of credit(10)(2)(4)(1)(3)— — — 
Tax-exempt bonds(81)— — — — — (81)— 
Available capacity under the Master Credit Facility$7,806 $1,142 $996 $1,524 $1,422 $1,023 $717 $982 
(a)Represents the sublimit of each borrower.
(b)Duke Energy issued $625 million of commercial paper and loaned the proceeds through the money pool to Duke Energy Carolinas, Duke Energy Progress, Duke Energy Ohio and Duke Energy Indiana. The balances are classified as Long-Term Debt Payable to Affiliated Companies on the Condensed Consolidated Balance Sheets.
Duke Energy Term Loan Facility
Duke Energy (Parent) had a $1 billion revolving credit facility, which was terminated in March 2022 (Three-Year Revolving Credit Facility). In March 2022, Duke Energy (Parent) entered into a Term Loan Credit Facility (facility) with commitments totaling $1.4 billion maturing March 2024. Borrowings under the facility were used to repay amounts drawn under the Three-Year Revolving Credit Facility prior to its termination and for general corporate purposes, including repayment of a portion of Duke Energy's outstanding commercial paper. In December 2022, Duke Energy (Parent) repaid $400 million of the facility. In January 2024, Duke Energy (Parent) repaid the remaining $1 billion outstanding on the facility.
Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida Term Loan Facilities
In November 2024, Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida entered into term loan facilities intended to meet incremental financing needs resulting from expenditures for the restoration of service and rebuilding of infrastructure related to hurricanes Debby, Helene and Milton as described in Note 4. Duke Energy Carolinas and Duke Energy Progress entered into two-year term loan facilities with commitments totaling $700 million and $250 million, respectively. Duke Energy Florida entered into a 364-day term loan facility with commitments totaling $800 million. Amounts may be drawn for six months from the Duke Energy Carolinas and Duke Energy Progress term loan facilities and for four months from the Duke Energy Florida term loan facility. Borrowings from the term loan facilities can be prepaid at any time and may be used to fund system restoration expenses and for general corporate purposes. Additionally, the Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida term loan facilities may be increased by $300 million, $150 million and $400 million, respectively.
In the fourth quarter of 2024, $455 million and $185 million were drawn under the term loan facilities for Duke Energy Carolinas and Duke Energy Progress, respectively, which were both classified as Long-Term Debt on the Consolidated Balance Sheets as of December 31, 2024. Through December 2024, $100 million was drawn under the term loan facility for Duke Energy Florida, which was classified as Current maturities of long-term debt on the Consolidated Balance Sheets as of December 31, 2024.
In the first quarter of 2025, an additional $145 million, $65 million and $700 million were drawn under the term loan facilities for Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, respectively. As of March 31, 2025, total borrowings of $600 million for Duke Energy Carolinas and $250 million for Duke Energy Progress were classified as Long-Term Debt and total borrowings of $800 million for Duke Energy Florida were classified as Current maturities of long-term debt on the Condensed Consolidated Balance Sheets.
In April 2025, Duke Energy Carolinas drew the remaining $100 million on its term loan facility.
v3.25.1
Goodwill
 3 Months Ended
Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill GOODWILL
Duke Energy
Duke Energy's Goodwill balance of $19.3 billion is allocated $17.4 billion to EU&I and $1.9 billion to GU&I on Duke Energy's Condensed Consolidated Balance Sheets at March 31, 2025, and December 31, 2024. There are no accumulated impairment charges.
Duke Energy Ohio
Duke Energy Ohio's Goodwill balance of $920 million, allocated $596 million to EU&I and $324 million to GU&I, is presented net of accumulated impairment charges of $216 million on the Condensed Consolidated Balance Sheets at March 31, 2025, and December 31, 2024.
Progress Energy
Progress Energy's Goodwill is included in the EU&I segment and there are no accumulated impairment charges.
Piedmont
Piedmont's Goodwill is included in the GU&I segment and there are no accumulated impairment charges.
v3.25.1
Related Party Transactions
 3 Months Ended
Mar. 31, 2025
Related Party Transactions [Abstract]  
Related Party Transactions RELATED PARTY TRANSACTIONS
The Subsidiary Registrants engage in related party transactions in accordance with applicable state and federal commission regulations. Refer to the Condensed Consolidated Balance Sheets of the Subsidiary Registrants for balances due to or due from related parties. Transactions with related parties included on the Condensed Consolidated Statements of Operations and Comprehensive Income are presented in the following table.
Three Months Ended March 31,
(in millions)20252024
Duke Energy Carolinas
Corporate governance and shared service expenses(a)
$178 $214 
Indemnification coverages(b)
13 11 
JDA revenue(c)
82 16 
JDA expense(c)
116 40 
Intercompany natural gas purchases(d)
2 4 
Progress Energy
Corporate governance and shared service expenses(a)
$150 $188 
Indemnification coverages(b)
16 14 
JDA revenue(c)
116 40 
JDA expense(c)
82 16 
Intercompany natural gas purchases(d)
19 19 
Duke Energy Progress
Corporate governance and shared service expenses(a)
$86 $114 
Indemnification coverages(b)
7 6 
JDA revenue(c)
116 40 
JDA expense(c)
82 16 
Intercompany natural gas purchases(d)
19 19 
Duke Energy Florida
Corporate governance and shared service expenses(a)
$64 $74 
Indemnification coverages(b)
9 8 
Duke Energy Ohio
Corporate governance and shared service expenses(a)
$64 $77 
Indemnification coverages(b)
1 2 
Duke Energy Indiana
Corporate governance and shared service expenses(a)
$71 $102 
Indemnification coverages(b)
2 2 
Piedmont
Corporate governance and shared service expenses(a)
$31 $41 
Indemnification coverages(b)
1 1 
Intercompany natural gas sales(d)
21 23 
Natural gas storage and transportation costs(e)
5 6 
(a)The Subsidiary Registrants are charged their proportionate share of corporate governance and other shared services costs, primarily related to human resources, employee benefits, information technology, legal and accounting fees, as well as other third-party costs. These amounts are primarily recorded in Operation, maintenance and other and Impairment of assets and other charges on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(b)The Subsidiary Registrants incur expenses related to certain indemnification coverages through Bison, Duke Energy’s wholly owned captive insurance subsidiary. These expenses are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(c)Duke Energy Carolinas and Duke Energy Progress participate in a JDA, which allows the collective dispatch of power plants between the service territories to reduce customer rates. Revenues from the sale of power and expenses from the purchase of power pursuant to the JDA are recorded in Operating Revenues and Fuel used in electric generation and purchased power, respectively, on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(d)Piedmont provides long-term natural gas delivery service to certain Duke Energy Carolinas and Duke Energy Progress natural gas-fired generation facilities. Piedmont records the sales in Operating Revenues, and Duke Energy Carolinas and Duke Energy Progress record the related purchases as a component of Fuel used in electric generation and purchased power on their respective Condensed Consolidated Statements of Operations and Comprehensive Income.
(e)Piedmont has related party transactions as a customer of its equity method investments in Pine Needle LNG Company, LLC, Hardy Storage Company, LLC and Cardinal Pipeline Company, LLC natural gas storage and transportation facilities. These expenses are included in Cost of natural gas on Piedmont's Condensed Consolidated Statements of Operations and Comprehensive Income.
In addition to the amounts presented above, the Subsidiary Registrants have other affiliate transactions, including rental of office space, participation in a money pool arrangement, other operational transactions and their proportionate share of certain charged expenses. These transactions of the Subsidiary Registrants are incurred in the ordinary course of business and are eliminated in consolidation.
As discussed in Note 12, certain trade receivables were previously sold by Duke Energy Ohio and Duke Energy Indiana to CRC, an affiliate formed by a subsidiary of Duke Energy. The proceeds obtained from the sales of receivables were largely cash but included a subordinated note from CRC for a portion of the purchase price. In March 2024, Duke Energy repaid all outstanding CRC borrowings and terminated the related CRC credit facility.
Intercompany Income Taxes
Duke Energy and the Subsidiary Registrants file a consolidated federal income tax return and other state and jurisdictional returns. The Subsidiary Registrants have a tax sharing agreement with Duke Energy for the allocation of consolidated tax liabilities and benefits. Income taxes recorded represent amounts the Subsidiary Registrants would incur as separate C-Corporations. The following table includes the balance of intercompany income tax receivables and payables for the Subsidiary Registrants.
DukeDukeDukeDukeDuke
EnergyProgressEnergyEnergyEnergyEnergy
(in millions)CarolinasEnergyProgressFloridaOhioIndianaPiedmont
March 31, 2025
Intercompany income tax payable$53 $55 $14 $40 $35 $31 $87 
December 31, 2024
Intercompany income tax receivable$— $— $— $154 $— $— $— 
Intercompany income tax payable419 169 315 — 43 110 43 
v3.25.1
Derivatives and Hedging
 3 Months Ended
Mar. 31, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivatives and Hedging DERIVATIVES AND HEDGING
The Duke Energy Registrants use commodity, interest rate and foreign currency contracts to manage commodity price risk, interest rate risk and foreign currency exchange rate risk. The primary use of commodity derivatives is to hedge the generation portfolio against changes in the prices of electricity and natural gas. Piedmont enters into natural gas supply contracts to provide diversification, reliability and natural gas cost benefits to its customers. Interest rate derivatives are used to manage interest rate risk associated with borrowings. Foreign currency derivatives are used to manage risk related to foreign currency exchange rates on certain issuances of debt.
All derivative instruments not identified as NPNS are recorded at fair value as assets or liabilities on the Condensed Consolidated Balance Sheets. Cash collateral related to derivative instruments executed under master netting arrangements is offset against the collateralized derivatives on the Condensed Consolidated Balance Sheets. The cash impacts of settled derivatives are recorded as operating activities on the Condensed Consolidated Statements of Cash Flows.
INTEREST RATE RISK
The Duke Energy Registrants are exposed to changes in interest rates as a result of their issuance or anticipated issuance of variable-rate and fixed-rate debt and commercial paper. Interest rate risk is managed by limiting variable-rate exposures to a percentage of total debt and by monitoring changes in interest rates. To manage risk associated with changes in interest rates, the Duke Energy Registrants may enter into interest rate swaps, U.S. Treasury lock agreements and other financial contracts. In anticipation of certain fixed-rate debt issuances, a series of forward-starting interest rate swaps or Treasury locks may be executed to lock in components of current market interest rates. These instruments are later terminated prior to or upon the issuance of the corresponding debt.
Cash Flow Hedges
For a derivative designated as hedging the exposure to variable cash flows of a future transaction, referred to as a cash flow hedge, the effective portion of the derivative's gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings once the future transaction impacts earnings. Amounts for interest rate contracts are reclassified to earnings as interest expense over the term of the related debt. Gains and losses reclassified out of accumulated other comprehensive income (loss) for the three months ended March 31, 2025, and 2024, were not material. Duke Energy's interest rate derivatives designated as hedges include forward-starting interest rate swaps not accounted for under regulatory accounting.
Undesignated Contracts
Undesignated contracts primarily include contracts not designated as a hedge because they are accounted for under regulatory accounting or contracts that do not qualify for hedge accounting.
Duke Energy’s interest rate swaps for its regulated operations employ regulatory accounting. With regulatory accounting, the mark-to-market gains or losses on the swaps are deferred as regulatory liabilities or regulatory assets, respectively. Regulatory assets and liabilities are amortized consistent with the treatment of the related costs in the ratemaking process. The accrual of interest on the swaps is recorded as Interest Expense on the Duke Energy Registrant's Condensed Consolidated Statements of Operations and Comprehensive Income.
The following tables show notional amounts of outstanding derivatives related to interest rate risk.
March 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaIndianaOhio
Cash flow hedges$2,975 $— $— $— $— $— $— 
Undesignated contracts3,527 1,425 1,625 500 1,125 450 27 
Total notional amount$6,502 $1,425 $1,625 $500 $1,125 $450 $27 
December 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaIndianaOhio
Cash flow hedges$2,825 $— $— $— $— $— $— 
Undesignated contracts3,202 1,150 1,775 1,125 650 250 27 
Total notional amount$6,027 $1,150 $1,775 $1,125 $650 $250 $27 
COMMODITY PRICE RISK
The Duke Energy Registrants are exposed to the impact of changes in the prices of electricity purchased and sold in bulk power markets and natural gas purchases, including Piedmont's natural gas supply contracts. Exposure to commodity price risk is influenced by a number of factors including the term of contracts, the liquidity of markets and delivery locations. To manage risk associated with commodity prices, the Duke Energy Registrants may enter into long-term power purchase or sales contracts and long-term natural gas supply agreements.
Undesignated Contracts
For the Subsidiary Registrants, bulk power electricity and natural gas purchases flow through fuel adjustment clauses, formula-based contracts or other cost-sharing mechanisms. Differences between the costs included in rates and the incurred costs, including undesignated derivative contracts, are largely deferred as regulatory assets or regulatory liabilities. Piedmont policies allow for the use of financial instruments to hedge commodity price risks. The strategy and objective of these hedging programs are to use the financial instruments to reduce natural gas cost volatility for customers.
Volumes
The tables below include volumes of outstanding commodity derivatives. Amounts disclosed represent the absolute value of notional volumes of commodity contracts excluding NPNS. The Duke Energy Registrants have netted contractual amounts where offsetting purchase and sale contracts exist with identical delivery locations and times of delivery. Where all commodity positions are perfectly offset, no quantities are shown.
March 31, 2025
DukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergy
EnergyCarolinasEnergyProgressOhioIndianaPiedmont
Electricity (GWh)4,679 — — — 518 4,161 — 
Natural gas (millions of dekatherms)780 288 250 250 — 26 216 
December 31, 2024
DukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergy
EnergyCarolinasEnergyProgressOhioIndianaPiedmont
Electricity (GWh)12,229 — — — 1,287 10,942 — 
Natural gas (millions of dekatherms)779 276 246 246 — 32 225 
FOREIGN CURRENCY RISK
Duke Energy may enter into foreign currency derivatives to hedge exposure to changes in foreign currency exchange rates, such as that arising from the issuance of debt denominated in a currency other than U.S. dollars.
Fair Value Hedges
Derivatives related to existing fixed-rate securities are accounted for as fair value hedges, where the derivatives’ fair value gains or losses and hedged items’ fair value gains or losses are both recorded directly to earnings on the same income statement line item, including foreign currency gains or losses arising from changes in the U.S. currency exchange rates. Duke Energy has elected to exclude the cross-currency basis spread from the assessment of effectiveness in the fair value hedges of its foreign currency risk and record any difference between the change in the fair value of the excluded components and the amounts recognized in earnings as a component of other comprehensive income or loss.
The following table shows Duke Energy's outstanding derivatives related to foreign currency risk at March 31, 2025.
Fair Value Gain (Loss)(a)
(in millions)
Pay NotionalReceive NotionalReceiveHedgeThree Months Ended March 31,
(in millions)Pay Rate(in millions)RateMaturity Date20252024
Fair value hedges
$645 4.75 %600 euros3.10 %June 2028$28 $2 
537 5.31 %500 euros3.85 %June 203423 2 
815 5.65 %750 
euros
3.75 %April 203135 — 
Total notional amount$1,997 1,850 euros$86 $4 
(a)    Amounts are recorded in Other Income and expenses, net on the Condensed Consolidated Statement of Operations, which offsets an equal translation adjustment of the foreign denominated debt. See the Condensed Consolidated Statements of Comprehensive Income for amounts excluded from the assessment of effectiveness for which the difference between changes in fair value and periodic amortization is recorded.
LOCATION AND FAIR VALUE OF DERIVATIVE ASSETS AND LIABILITIES RECOGNIZED IN THE CONDENSED CONSOLIDATED BALANCE SHEETS
The following tables show the fair value and balance sheet location of derivative instruments. Although derivatives subject to master netting arrangements are netted on the Condensed Consolidated Balance Sheets, the fair values presented below are shown gross and cash collateral on the derivatives have not been netted against the fair values shown.
Derivative AssetsMarch 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Commodity Contracts
Not Designated as Hedging Instruments
Current$210 $102 $86 $86 $— $1 $21 $— 
Noncurrent84 41 43 43 — — — — 
Total Derivative Assets – Commodity Contracts$294 $143 $129 $129 $— $1 $21 $— 
Interest Rate Contracts
Designated as Hedging Instruments
Current$74 $— $— $— $— $— $— $— 
Noncurrent27 — — — — — — — 
Not Designated as Hedging Instruments
Current36 — 4 — 4 — 32 — 
Noncurrent30 16 14 10 4 — — — 
Total Derivative Assets – Interest Rate Contracts$167 $16 $18 $10 $8 $— $32 $— 
Foreign Currency Contracts
Designated as Hedging Instruments
Noncurrent11 — — — — — — — 
Total Derivative Assets – Foreign Currency Contracts$11 $— $— $— $— $— $— $— 
Total Derivative Assets$472 $159 $147 $139 $8 $1 $53 $— 
Derivative LiabilitiesMarch 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Commodity Contracts
Not Designated as Hedging Instruments
Current$55 $32 $1 $1 $— $— $— $22 
Noncurrent130 25 19 19 — — — 86 
Total Derivative Liabilities – Commodity Contracts$185 $57 $20 $20 $— $— $— $108 
Interest Rate Contracts
Designated as Hedging Instruments
Current$7 $— $— $— $— $— $— $— 
Not Designated as Hedging Instruments
Current9 — 9 — 9 — — — 
Noncurrent18 7 8 5 4 1 3 — 
Total Derivative Liabilities – Interest Rate Contracts$34 $7 $17 $5 $13 $1 $3 $— 
Foreign Currency Contracts
Designated as Hedging Instruments
Current33 — — — — — — — 
Noncurrent20 — — — — — — — 
Total Derivative Liabilities – Foreign Currency Contracts$53 $— $— $— $— $— $— $— 
Total Derivative Liabilities$272 $64 $37 $25 $13 $1 $3 $108 
Derivative AssetsDecember 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Commodity Contracts
Not Designated as Hedging Instruments
Current$49 $20 $17 $17 $— $1 $8 $1 
Noncurrent60 29 32 32 — — — — 
Total Derivative Assets – Commodity Contracts$109 $49 $49 $49 $— $1 $8 $1 
Interest Rate Contracts
Designated as Hedging Instruments
Current108 — — — — — — — 
Noncurrent52 — — — — — — — 
Not Designated as Hedging Instruments
Current110 19 55 44 11 — 36 — 
Noncurrent50 26 23 16 7 — — — 
Total Derivative Assets – Interest Rate Contracts$320 $45 $78 $60 $18 $— $36 $— 
Foreign Currency Contracts
Designated as Hedging Instruments
Noncurrent5 — — — — — — — 
Total Derivative Assets – Foreign Currency Contracts
$5 $— $— $— $— $— $— $— 
Total Derivative Assets$434 $94 $127 $109 $18 $1 $44 $1 
Derivative LiabilitiesDecember 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Commodity Contracts
Not Designated as Hedging Instruments
Current$108 $57 $32 $32 $— $— $3 $16 
Noncurrent134 31 24 24 — — — 78 
Total Derivative Liabilities – Commodity Contracts$242 $88 $56 $56 $— $— $3 $94 
Interest Rate Contracts
Not Designated as Hedging Instruments
Current2 — 2 1 1 — — — 
Noncurrent1 — — — — 1 — — 
Total Derivative Liabilities – Interest Rate Contracts$3 $— $2 $1 $1 $1 $— $— 
Foreign Currency Contracts
Designated as Hedging Instruments
Current35 — — — — — — — 
Noncurrent39 — — — — — — — 
Total Derivative Liabilities – Foreign Currency Contracts
$74 $— $— $— $— $— $— $— 
Total Derivative Liabilities$319 $88 $58 $57 $1 $1 $3 $94 
OFFSETTING ASSETS AND LIABILITIES
The following tables present the line items on the Condensed Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. The amounts shown are calculated by counterparty. Accounts receivable or accounts payable may also be available to offset exposures in the event of bankruptcy. These amounts are not included in the tables below.
Derivative AssetsMarch 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Current
Gross amounts recognized$320 $102 $90 $86 $4 $1 $53 $— 
Offset
(1)(1)(1)(1)— — — — 
Cash collateral received
$(3)$(3)$— $— $— $— $— $— 
Net amounts presented in Current Assets: Other$316 $98 $89 $85 $4 $1 $53 $— 
Noncurrent
Gross amounts recognized$152 $57 $57 $53 $4 $— $— $— 
Offset
(36)(18)(18)(18)— — — — 
Cash collateral received
(2)(2)— — — — — — 
Net amounts presented in Other Noncurrent Assets: Other$114 $37 $39 $35 $4 $— $— $— 
Derivative LiabilitiesMarch 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Current
Gross amounts recognized$104 $32 $10 $1 $9 $— $— $22 
Offset
(1)(1)(1)(1)— — — — 
Net amounts presented in Current Liabilities: Other$103 $31 $9 $— $9 $— $— $22 
Noncurrent
Gross amounts recognized$168 $32 $27 $24 $4 $1 $3 $86 
Offset
(36)(18)(18)(18)— — — — 
Net amounts presented in Other Noncurrent Liabilities: Other$132 $14 $9 $6 $4 $1 $3 $86 
Derivative AssetsDecember 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Current
Gross amounts recognized$267 $39 $72 $61 $11 $1 $44 $1 
Offset
(29)(15)(14)(14)— — — — 
Net amounts presented in Current Assets: Other$238 $24 $58 $47 $11 $1 $44 $1 
Noncurrent
Gross amounts recognized$167 $55 $55 $48 $7 $— $— $— 
Offset
(37)(19)(17)(17)— — — — 
Net amounts presented in Other Noncurrent Assets: Other$130 $36 $38 $31 $7 $— $— $— 
Derivative LiabilitiesDecember 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Current
Gross amounts recognized$145 $57 $34 $33 $1 $— $3 $16 
Offset
(29)(15)(14)(14)— — — — 
Cash collateral posted
(3)(2)— — — — (1)— 
Net amounts presented in Current Liabilities: Other$113 $40 $20 $19 $1 $— $2 $16 
Noncurrent
Gross amounts recognized$174 $31 $24 $24 $— $1 $— $78 
Offset
(37)(19)(17)(17)— — — — 
Cash collateral posted
(4)(4)— — — — — — 
Net amounts presented in Other Noncurrent Liabilities: Other$133 $8 $7 $7 $— $1 $— $78 
OBJECTIVE CREDIT CONTINGENT FEATURES
Certain derivative contracts contain objective credit contingent features. These features include the requirement to post cash collateral or letters of credit if specific events occur, such as a credit rating downgrade below investment grade. The following tables show information with respect to derivative contracts that are in a net liability position and contain objective credit risk-related payment provisions.
March 31, 2025
DukeDuke
DukeEnergyProgressEnergy
(in millions)EnergyCarolinasEnergyProgress
Aggregate fair value of derivatives in a net liability position$31 $20 $11 $11 
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered$31 $20 $11 $11 
December 31, 2024
DukeDuke
DukeEnergyProgressEnergy
(in millions)EnergyCarolinasEnergyProgress
Aggregate fair value of derivatives in a net liability position$101 $52 $49 $49 
Fair value of collateral already posted6 6 — — 
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered$95 $46 $49 $49 
The Duke Energy Registrants have elected to offset cash collateral and fair values of derivatives. For amounts to be netted, the derivative and cash collateral must be executed with the same counterparty under the same master netting arrangement.
v3.25.1
Investments in Debt and Equity Securities
 3 Months Ended
Mar. 31, 2025
Investments, Debt and Equity Securities [Abstract]  
Investments In Debt and Equity Securities INVESTMENTS IN DEBT AND EQUITY SECURITIES
Duke Energy’s investments in debt and equity securities are primarily comprised of investments held in (i) the nuclear decommissioning trust funds (NDTF) at Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, (ii) the grantor trusts at Duke Energy Florida and Duke Energy Indiana related to OPEB plans and (iii) Bison. The Duke Energy Registrants classify investments in debt securities as Available for Sale (AFS) and investments in equity securities as fair value through net income (FV-NI).
For investments in debt securities classified as AFS, the unrealized gains and losses are included in other comprehensive income until realized, at which time they are reported through net income. For investments in equity securities classified as FV-NI, both realized and unrealized gains and losses are reported through net income. Substantially all of Duke Energy’s investments in debt and equity securities qualify for regulatory accounting, and accordingly, all associated realized and unrealized gains and losses on these investments are deferred as a regulatory asset or liability.
Duke Energy classifies the majority of investments in debt and equity securities as long term, unless otherwise noted.
Investment Trusts
The investments within the Investment Trusts are managed by independent investment managers with discretion to buy, sell and invest pursuant to the guidelines set forth by the investment manager agreements and trust agreements. The Duke Energy Registrants have limited oversight of the day-to-day management of these investments. As a result, the ability to hold investments in unrealized loss positions is outside the control of the Duke Energy Registrants. Accordingly, all unrealized losses associated with debt securities within the Investment Trusts are recognized immediately and deferred to regulatory accounts where appropriate.
Other AFS Securities
Unrealized gains and losses on all other AFS securities are included in other comprehensive income until realized, unless it is determined the carrying value of an investment has a credit loss. The Duke Energy Registrants analyze all investment holdings each reporting period to determine whether a decline in fair value is related to a credit loss. If a credit loss exists, the unrealized credit loss is included in earnings. There were no material credit losses as of March 31, 2025, and December 31, 2024.
Other Investments amounts are recorded in Other within Other Noncurrent Assets on the Condensed Consolidated Balance Sheets.
DUKE ENERGY
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
NDTF
Cash and cash equivalents$— $— $128 $— $— $139 
Equity securities5,430 85 7,828 5,753 61 8,233 
Corporate debt securities8 29 793 6 33 673 
Municipal bonds1 18 341 2 14 342 
U.S. government bonds15 55 1,904 3 84 1,806 
Other debt securities2 7 250 1 8 239 
Total NDTF Investments$5,456 $194 $11,244 $5,765 $200 $11,432 
Other Investments
Cash and cash equivalents$— $— $195 $— $— $47 
Equity securities36 3 113 39 4 160 
Corporate debt securities— 4 77 — 5 79 
Municipal bonds— 1 63 — 1 83 
U.S. government bonds— 4 57 — 5 59 
Other debt securities— 3 43 — 4 45 
Total Other Investments$36 $15 $548 $39 $19 $473 
Total Investments$5,492 $209 $11,792 $5,804 $219 $11,905 
Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2025, and 2024, were as follows.
Three Months Ended
(in millions)March 31, 2025March 31, 2024
FV-NI:
 Realized gains $126 $68 
 Realized losses41 18 
AFS:
 Realized gains10 10 
 Realized losses20 14 
DUKE ENERGY CAROLINAS
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
NDTF
Cash and cash equivalents$— $— $53 $— $— $62 
Equity securities3,185 40 4,512 3,386 33 4,751 
Corporate debt securities3 24 494 2 27 401 
Municipal bonds— 6 34 — 4 36 
U.S. government bonds8 32 1,049 — 50 991 
Other debt securities2 7 234 1 8 223 
Total NDTF Investments$3,198 $109 $6,376 $3,389 $122 $6,464 
Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2025, and 2024, were as follows.
Three Months Ended
(in millions)March 31, 2025March 31, 2024
FV-NI:
 Realized gains$82 $53 
 Realized losses 22 6 
AFS:
 Realized gains7 4 
 Realized losses14 6 
PROGRESS ENERGY
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
NDTF
Cash and cash equivalents$— $— $75 $— $— $77 
Equity securities2,245 45 3,316 2,367 28 3,482 
Corporate debt securities5 5 299 4 6 272 
Municipal bonds1 12 307 2 10 306 
U.S. government bonds7 23 855 3 34 815 
Other debt securities— — 16 — — 16 
Total NDTF Investments$2,258 $85 $4,868 $2,376 $78 $4,968 
Other Investments
Cash and cash equivalents$— $— $21 $— $— $23 
Municipal bonds— — 24 — — 24 
Total Other Investments$— $— $45 $— $— $47 
Total Investments$2,258 $85 $4,913 $2,376 $78 $5,015 
Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2025, and 2024, were as follows.
Three Months Ended
(in millions)March 31, 2025March 31, 2024
FV-NI:
 Realized gains$44 $15 
 Realized losses19 12 
AFS:
 Realized gains3 6 
 Realized losses6 8 
DUKE ENERGY PROGRESS
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
NDTF
Cash and cash equivalents$— $— $62 $— $— $54 
Equity securities2,139 45 3,201 2,256 28 3,362 
Corporate debt securities5 5 283 4 6 256 
Municipal bonds1 12 307 2 10 306 
U.S. government bonds7 17 696 3 26 645 
Other debt securities— — 14 — — 14 
Total NDTF Investments$2,152 $79 $4,563 $2,265 $70 $4,637 
Other Investments
Cash and cash equivalents$— $— $14 $— $— $16 
Total Other Investments$— $— $14 $— $— $16 
Total Investments$2,152 $79 $4,577 $2,265 $70 $4,653 
Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2025, and 2024, were as follows.
Three Months Ended
(in millions)March 31, 2025March 31, 2024
FV-NI:
 Realized gains$44 $15 
 Realized losses19 12 
AFS:
 Realized gains3 6 
 Realized losses6 8 
DUKE ENERGY FLORIDA
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
NDTF
Cash and cash equivalents$— $— $13 $— $— $23 
Equity securities106 — 115 111 — 120 
Corporate debt securities— — 16 — — 16 
U.S. government bonds— 6 159 — 8 170 
Other debt securities— — 2 — — 2 
Total NDTF Investments(a)
$106 $6 $305 $111 $8 $331 
Other Investments
Cash and cash equivalents$— $— $3 $— $— $3 
Municipal bonds— — 24 — — 24 
Total Other Investments$— $— $27 $— $— $27 
Total Investments$106 $6 $332 $111 $8 $358 
(a)During the three months ended March 31, 2025, and the year ended December 31, 2024, Duke Energy Florida received reimbursements from the NDTF for costs related to ongoing decommissioning activity of Crystal River Unit 3.
Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2025, and 2024, were immaterial.
DUKE ENERGY INDIANA
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are measured at FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
Investments
Cash and cash equivalents$— $— $2 $— $— $1 
Equity securities— 3 43 — 4 89 
Corporate debt securities— — 1 — — 6 
Municipal bonds— 1 23 — 1 43 
U.S. government bonds— — 2 — — 7 
Total Investments$— $4 $71 $— $5 $146 
Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2025, and 2024, were immaterial.
DEBT SECURITY MATURITIES
The table below summarizes the maturity date for debt securities.
March 31, 2025
DukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaIndiana
Due in one year or less$83 $5 $75 $19 $56 $1 
Due after one through five years921 441 414 334 80 8 
Due after five through 10 years610 286 273 258 15 7 
Due after 10 years1,914 1,079 739 689 50 10 
Total$3,528 $1,811 $1,501 $1,300 $201 $26 
v3.25.1
Fair Value Measurements
 3 Months Ended
Mar. 31, 2025
Fair Value Disclosures [Abstract]  
Fair Value Measurements FAIR VALUE MEASUREMENTS
Fair value is the exchange price to sell an asset or transfer a liability in an orderly transaction between market participants at the measurement date. The fair value definition focuses on an exit price versus the acquisition cost. Fair value measurements use market data or assumptions market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs may be readily observable, corroborated by market data or generally unobservable. Valuation techniques maximize the use of observable inputs and minimize the use of unobservable inputs. A midmarket pricing convention (the midpoint price between bid and ask prices) is permitted for use as a practical expedient.
Fair value measurements are classified in three levels based on the fair value hierarchy as defined by GAAP. Certain investments are not categorized within the fair value hierarchy. These investments are measured at fair value using the net asset value per share practical expedient. The net asset value is derived based on the investment cost, less any impairment, plus or minus changes resulting from observable price changes for an identical or similar investment of the same issuer.
Fair value accounting guidance permits entities to elect to measure certain financial instruments that are not required to be accounted for at fair value, such as equity method investments or the Company’s own debt, at fair value. The Duke Energy Registrants have not elected to record any of these items at fair value.
Valuation methods of the primary fair value measurements disclosed below are as follows.
Investments in equity securities
The majority of investments in equity securities are valued using Level 1 measurements. Investments in equity securities are typically valued at the closing price in the principal active market as of the last business day of the quarter. Principal active markets for equity prices include published exchanges such as the New York Stock Exchange and Nasdaq Stock Market. Foreign equity prices are translated from their trading currency using the currency exchange rate in effect at the close of the principal active market. There was no after-hours market activity that was required to be reflected in the reported fair value measurements.
Investments in debt securities
Most investments in debt securities are valued using Level 2 measurements because the valuations use interest rate curves and credit spreads applied to the terms of the debt instrument (maturity and coupon interest rate) and consider the counterparty credit rating. If the market for a particular fixed-income security is relatively inactive or illiquid, the measurement is Level 3.
Commodity derivatives
Commodity derivatives with clearinghouses are classified as Level 1. Commodity derivatives with observable forward curves are classified as Level 2. If forward price curves are not observable for the full term of the contract and the unobservable period had more than an insignificant impact on the valuation, the commodity derivative is classified as Level 3. In isolation, increases (decreases) in natural gas forward prices result in favorable (unfavorable) fair value adjustments for natural gas purchase contracts; and increases (decreases) in electricity forward prices result in unfavorable (favorable) fair value adjustments for electricity sales contracts. Duke Energy regularly evaluates and validates pricing inputs used to estimate the fair value of certain commodity contracts by a market participant price verification procedure. This procedure provides a comparison of internal forward commodity curves to market participant generated curves.
Interest rate derivatives
Most over-the-counter interest rate contract derivatives are valued using financial models that utilize observable inputs for similar instruments and are classified as Level 2. Inputs include forward interest rate curves, notional amounts, interest rates and credit quality of the counterparties.
Foreign currency derivatives
Most over-the-counter foreign currency derivatives are valued using financial models that utilize observable inputs for similar instruments and are classified as Level 2. Inputs include forward foreign currency rate curves, notional amounts, foreign currency rates and credit quality of the counterparties.
Other fair value considerations
See Note 12 in Duke Energy's Annual Report on Form 10-K for the year ended December 31, 2024, for a discussion of the valuation of goodwill and intangible assets.
DUKE ENERGY
The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. Derivative amounts in the tables below for all Duke Energy Registrants exclude cash collateral, which is disclosed in Note 9. See Note 10 for additional information related to investments by major security type for the Duke Energy Registrants.
March 31, 2025
(in millions)Total Fair ValueLevel 1Level 2Level 3Not Categorized
NDTF cash and cash equivalents$128 $128 $— $— $— 
NDTF equity securities7,828 7,800 2 — 26 
NDTF debt securities3,288 1,056 2,232 — — 
Other equity securities113 113 — — — 
Other debt securities240 55 185 — — 
Other cash and cash equivalents195 195 — — — 
Derivative assets472 19 450 3 — 
Total assets12,264 9,366 2,869 3 26 
Derivative liabilities(272)— (272)— — 
Net assets$11,992 $9,366 $2,597 $3 $26 
December 31, 2024
(in millions)Total Fair ValueLevel 1Level 2Level 3Not Categorized
NDTF cash and cash equivalents$139 $139 $— $— $— 
NDTF equity securities8,233 8,203 2 — 28 
NDTF debt securities3,060 1,022 2,038 — — 
Other equity securities160 160 — — — 
Other debt securities266 52 214 — — 
Other cash and cash equivalents47 47 — — — 
Derivative assets434 2 423 9 — 
Total assets12,339 9,625 2,677 9 28 
Derivative liabilities(319)(3)(316)— — 
Net assets$12,020 $9,622 $2,361 $9 $28 
The following table provides reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.
Derivatives (net)
Three Months Ended March 31,
(in millions) 20252024
Balance at beginning of period$9 $15 
Purchases, sales, issuances and settlements:
Settlements(6)(13)
Total gains included on the Condensed Consolidated Balance Sheet
— 4 
Balance at end of period$3 $6 
DUKE ENERGY CAROLINAS
The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
March 31, 2025
(in millions)Total Fair ValueLevel 1Level 2Not Categorized
NDTF cash and cash equivalents$53 $53 $— $— 
NDTF equity securities4,512 4,484 2 26 
NDTF debt securities1,811 525 1,286 — 
Derivative assets159 — 159 — 
Total assets6,535 5,062 1,447 26 
Derivative liabilities(64)— (64)— 
Net assets$6,471 $5,062 $1,383 $26 
December 31, 2024
(in millions)Total Fair ValueLevel 1Level 2Not Categorized
NDTF cash and cash equivalents$62 $62 $— $— 
NDTF equity securities4,751 4,721 2 28 
NDTF debt securities1,651 520 1,131 — 
Derivative assets94 — 94 — 
Total assets6,558 5,303 1,227 28 
Derivative liabilities(88)— (88)— 
Net assets$6,470 $5,303 $1,139 $28 
PROGRESS ENERGY
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
March 31, 2025December 31, 2024
(in millions)Total Fair ValueLevel 1Level 2Total Fair ValueLevel 1Level 2
NDTF cash and cash equivalents$75 $75 $— $77 $77 $— 
NDTF equity securities3,316 3,316 — 3,482 3,482 — 
NDTF debt securities1,477 531 946 1,409 502 907 
Other debt securities24 — 24 24 — 24 
Other cash and cash equivalents21 21 — 23 23 — 
Derivative assets147 — 147 127 — 127 
Total assets5,060 3,943 1,117 5,142 4,084 1,058 
Derivative liabilities(37)— (37)(58)— (58)
Net assets$5,023 $3,943 $1,080 $5,084 $4,084 $1,000 
DUKE ENERGY PROGRESS
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
March 31, 2025December 31, 2024
(in millions)Total Fair ValueLevel 1Level 2Total Fair ValueLevel 1Level 2
NDTF cash and cash equivalents$62 $62 $— $54 $54 $— 
NDTF equity securities3,201 3,201 — 3,362 3,362 — 
NDTF debt securities1,300 399 901 1,221 365 856 
Other cash and cash equivalents14 14 — 16 16 — 
Derivative assets139 — 139 109 — 109 
Total assets4,716 3,676 1,040 4,762 3,797 965 
Derivative liabilities(25)— (25)(57)— (57)
Net assets$4,691 $3,676 $1,015 $4,705 $3,797 $908 
DUKE ENERGY FLORIDA
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
March 31, 2025December 31, 2024
(in millions)Total Fair ValueLevel 1Level 2Total Fair ValueLevel 1Level 2
NDTF cash and cash equivalents$13 $13 $— $23 $23 $— 
NDTF equity securities115 115 — 120 120 — 
NDTF debt securities177 132 45 188 137 51 
Other debt securities24 — 24 24 — 24 
Other cash and cash equivalents3 3 — 3 3 — 
Derivative assets8 — 8 18 — 18 
Total assets340 263 77 376 283 93 
Derivative liabilities(13)— (13)(1)— (1)
Net assets$327 $263 $64 $375 $283 $92 
DUKE ENERGY OHIO
The recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets were not material at March 31, 2025, and December 31, 2024.
DUKE ENERGY INDIANA
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
March 31, 2025December 31, 2024
(in millions)Total Fair ValueLevel 1Level 2Level 3Total Fair ValueLevel 1Level 2Level 3
Other equity securities$43 $43 $— $— $89 $89 $— $— 
Other debt securities26 — 26 — 56 — 56 — 
Other cash and cash equivalents2 2 — — 1 1 — — 
Derivative assets53 19 32 2 44 — 36 8 
Total assets124 64 58 2 190 90 92 8 
Derivative liabilities(3)— (3)— (3)(3)— — 
Net assets$121 $64 $55 $2 $187 $87 $92 $8 
The following table provides a reconciliation of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.
Derivatives (net)
Three Months Ended March 31,
(in millions)20252024
Balance at beginning of period$8 $13 
Purchases, sales, issuances and settlements:
Settlements(6)(11)
Total gains included on the Condensed Consolidated Balance Sheet
— 3 
Balance at end of period$2 $5 
PIEDMONT
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
March 31, 2025December 31, 2024
(in millions)Total Fair ValueLevel 2Total Fair ValueLevel 1Level 2
Derivative assets$— $— $1 $1 $— 
Derivative liabilities(108)(108)(94)— (94)
Net (liabilities) assets$(108)$(108)$(93)$1 $(94)
QUANTITATIVE INFORMATION ABOUT UNOBSERVABLE INPUTS
The following tables include quantitative information about the Duke Energy Registrants' derivatives classified as Level 3.
March 31, 2025
Weighted
Fair ValueAverage
Investment Type(in millions)Valuation TechniqueUnobservable InputRangeRange
Duke Energy Ohio 
FTRs$1 RTO auction pricingFTR price – per MWh$0.36 -$1.42 $0.70 
Duke Energy Indiana 
FTRs2 RTO auction pricingFTR price – per MWh(0.48)-7.53 0.63 
Duke Energy
Total Level 3 derivatives$3 
December 31, 2024
Weighted
Fair ValueAverage
Investment Type(in millions)Valuation TechniqueUnobservable InputRangeRange
Duke Energy Ohio   
FTRs$1 RTO auction pricingFTR price – per MWh$— –$1.13 $0.48 
Duke Energy Indiana   
FTRs8 RTO auction pricingFTR price – per MWh(0.63)–9.24 0.94 
Duke Energy
Total Level 3 derivatives$9 
OTHER FAIR VALUE DISCLOSURES
The fair value and book value of long-term debt, including current maturities, is summarized in the following table. Estimates determined are not necessarily indicative of amounts that could have been settled in current markets. Fair value of long-term debt uses Level 2 measurements.
March 31, 2025December 31, 2024
(in millions)Book ValueFair ValueBook ValueFair Value
Duke Energy(a)
$83,880 $76,709 $80,689 $73,440 
Duke Energy Carolinas18,234 16,740 17,490 15,975 
Progress Energy26,883 24,925 24,496 22,548 
Duke Energy Progress14,220 12,716 12,504 11,009 
Duke Energy Florida11,018 10,423 10,348 9,752 
Duke Energy Ohio4,166 3,871 4,165 3,871 
Duke Energy Indiana4,798 4,329 4,798 4,329 
Piedmont4,004 3,642 4,003 3,584 
(a)Book value of long-term debt includes $1.0 billion at March 31, 2025, and December 31, 2024, of net unamortized debt discount and premium of purchase accounting adjustments related to the mergers with Progress Energy and Piedmont that are excluded from fair value of long-term debt.
At both March 31, 2025, and December 31, 2024, fair value of cash and cash equivalents, accounts and notes receivable, accounts payable, notes payable and commercial paper and nonrecourse notes payable of VIEs are not materially different from their carrying amounts because of the short-term nature of these instruments and/or because the stated rates approximate market rates.
v3.25.1
Variable Interest Entities
 3 Months Ended
Mar. 31, 2025
Variable Interest Entities [Abstract]  
Variable Interest Entities VARIABLE INTEREST ENTITIES
CONSOLIDATED VIEs
The obligations of the consolidated VIEs discussed in the following paragraphs are nonrecourse to the Duke Energy Registrants. The registrants have no requirement to provide liquidity to purchase assets of or guarantee performance of these VIEs unless noted in the following paragraphs.
No financial support was provided to any of the consolidated VIEs during the three months ended March 31, 2025, and the year ended December 31, 2024, or is expected to be provided in the future that was not previously contractually required.
Receivables Financing – DERF/DEPR/DEFR
DERF, DEPR and DEFR were bankruptcy remote, special purpose subsidiaries of Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, respectively. DERF, DEPR and DEFR were wholly owned LLCs with separate legal existence from their parent companies, and their assets were not generally available to creditors of their parent companies. On a revolving basis, DERF, DEPR and DEFR bought certain accounts receivable arising from the sale of electricity and related services from their parent companies.
DERF, DEPR and DEFR borrowed amounts under credit facilities to buy these receivables. Borrowing availability from the credit facilities was limited to the amount of qualified receivables purchased, which generally excluded receivables past due more than a predetermined number of days and reserves for expected past-due balances. The sole source of funds to satisfy the related debt obligations were cash collections from the receivables. Amounts borrowed under the DERF and DEPR credit facilities were reflected on the Condensed Consolidated Balance Sheets as Current maturities of long-term debt as of December 31, 2024.
The most significant activity that impacted the economic performance of DERF, DEPR and DEFR were the decisions made to manage delinquent receivables. Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida were considered the primary beneficiaries and consolidated DERF, DEPR and DEFR, respectively, as they made those decisions.
In April 2024, Duke Energy Florida repaid all outstanding DEFR borrowings totaling $325 million and terminated the related DEFR credit facility. Additionally, Duke Energy Florida's related restricted receivables outstanding at DEFR at the time of termination totaled $459 million and were transferred back to Duke Energy Florida to be collected and reported as Receivables on the Condensed Consolidated Balance Sheets.
In January 2025, Duke Energy Carolinas repaid all outstanding DERF borrowings totaling $500 million and terminated the related DERF credit facility. Additionally, Duke Energy Carolinas' related restricted receivables outstanding at DERF at the time of termination totaled $1,081 million and were transferred back to Duke Energy Carolinas to be collected and reported as Receivables on the Condensed Consolidated Balance Sheets.
In March 2025, Duke Energy Progress repaid all outstanding DEPR borrowings totaling $400 million and terminated the related DEPR credit facility. Additionally, Duke Energy Progress' related restricted receivables outstanding at DEPR at the time of termination totaled $943 million and were transferred back to Duke Energy Progress to be collected and reported as Receivables on the Condensed Consolidated Balance Sheets.
Receivables Financing – CRC
In March 2024, Duke Energy repaid all outstanding CRC borrowings totaling $350 million and terminated the related CRC credit facility. Additionally, Duke Energy's related restricted receivables outstanding at CRC at the time of termination totaled $682 million, consisting of $316 million and $366 million of restricted receivables that were transferred back to Duke Energy Indiana and Duke Energy Ohio, respectively, to be collected and reported as Receivables on the Condensed Consolidated Balance Sheets.
Receivables Financing – Credit Facilities
The following table summarizes the amounts and expiration dates of the credit facilities and associated restricted receivables described above.
Duke EnergyDuke Energy
CarolinasProgress
(in millions)DERFDEPR
Expiration date
(a)
(b)
Credit facility amount
(a)
(b)
Amounts borrowed at March 31, 2025— — 
Amounts borrowed at December 31, 2024500 400 
Restricted Receivables at March 31, 2025— — 
Restricted Receivables at December 31, 20241,054 835 
(a)    In January 2025, Duke Energy Carolinas repaid all outstanding DERF borrowings totaling $500 million and terminated the related DERF credit facility.
(b)    In March 2025, Duke Energy Progress repaid all outstanding DEPR borrowings totaling $400 million and terminated the related DEPR credit facility.
Nuclear Asset-Recovery Bonds
Duke Energy Florida Project Finance, LLC (DEFPF) is a bankruptcy remote, wholly owned special purpose subsidiary of Duke Energy Florida. DEFPF was formed in 2016 for the sole purpose of issuing nuclear asset-recovery bonds to finance Duke Energy Florida's unrecovered regulatory asset related to Crystal River Unit 3.
In 2016, DEFPF issued senior secured bonds and used the proceeds to acquire nuclear asset-recovery property from Duke Energy Florida. The nuclear asset-recovery property acquired includes the right to impose, bill, collect and adjust a non-bypassable nuclear asset-recovery charge from all Duke Energy Florida retail customers until the bonds are paid in full and all financing costs have been recovered. The nuclear asset-recovery bonds are secured by the nuclear asset-recovery property and cash collections from the nuclear asset-recovery charges are the sole source of funds to satisfy the debt obligation. The bondholders have no recourse to Duke Energy Florida.
DEFPF is considered a VIE primarily because the equity capitalization is insufficient to support its operations. Duke Energy Florida has the power to direct the significant activities of the VIE as described above and therefore Duke Energy Florida is considered the primary beneficiary and consolidates DEFPF.
The following table summarizes the impact of DEFPF on Duke Energy Florida's Condensed Consolidated Balance Sheets.
(in millions)March 31, 2025December 31, 2024
Regulatory Assets: Current61 61 
Current Assets: Other10 35 
Other Noncurrent Assets: Regulatory assets729 741 
Other Noncurrent Assets: Other
7 — 
Current Liabilities: Other2 8 
Current maturities of long-term debt60 59 
Long-Term Debt741 773 
Storm Recovery Bonds
Duke Energy Carolinas NC Storm Funding, LLC (DECNCSF), Duke Energy Progress NC Storm Funding, LLC (DEPNCSF) and Duke Energy Progress SC Storm Funding, LLC (DEPSCSF) are bankruptcy remote, wholly owned special purpose subsidiaries of Duke Energy Carolinas and Duke Energy Progress. DECNCSF and DEPNCSF were formed in 2021 while DEPSCSF was formed in 2024, all for the sole purpose of issuing storm recovery bonds to finance certain of Duke Energy Carolinas’ and Duke Energy Progress’ unrecovered regulatory assets related to storm costs incurred in North Carolina and South Carolina.
In 2021, DECNCSF and DEPNCSF issued senior secured bonds, and used the proceeds to acquire storm recovery property from Duke Energy Carolinas and Duke Energy Progress. The storm recovery property was created by state legislation and NCUC financing orders for the purpose of financing storm costs incurred in 2018 and 2019. In April 2024, DEPSCSF issued $177 million of senior secured bonds and used the proceeds to acquire storm recovery property from Duke Energy Progress. The storm recovery property was created by state legislation and a PSCSC financing order for the purpose of financing storm costs incurred from 2014 through 2022.
The storm recovery property acquired includes the right to impose, bill, collect and adjust a non-bypassable charge from all Duke Energy Carolinas’ and Duke Energy Progress’ North Carolina and South Carolina retail customers until the bonds are paid in full and all financing costs have been recovered. The storm recovery bonds are secured by the storm recovery property and cash collections from the storm recovery charges are the sole source of funds to satisfy the debt obligation. The bondholders have no recourse to Duke Energy Carolinas or Duke Energy Progress. These entities are considered VIEs primarily because their equity capitalization is insufficient to support their operations. Duke Energy Carolinas and Duke Energy Progress have the power to direct the significant activities of the VIEs as described above and therefore Duke Energy Carolinas and Duke Energy Progress are considered the primary beneficiaries. Duke Energy Carolinas consolidates DECNCSF and Duke Energy Progress consolidates DEPNCSF and DEPSCSF.
The following table summarizes the impact of these VIEs on Duke Energy Carolinas’ and Duke Energy Progress’ Consolidated Balance Sheets.
March 31, 2025December 31, 2024
Duke EnergyDuke EnergyDuke EnergyDuke Energy
CarolinasProgressCarolinasProgress
(in millions)DECNCSFDEPNCSFDEPSCSFDECNCSFDEPNCSFDEPSCSF
Regulatory Assets: Current$12 $39 $8 $12 $39 $8 
Current Assets: Other6 17 6 9 27 13 
Other Noncurrent Assets: Regulatory assets186 608 151 189 620 155 
Other Noncurrent Assets: Other1 4 1 1 4 1 
Current Liabilities: Other1 — — 2 10 7 
Current Maturities of Long-Term Debt
10 35 5 10 34 9 
Long-Term Debt193 629 160 198 646 163 
Procurement Company – Duke Energy Florida
Duke Energy Florida Purchasing Company, LLC (DEF ProCo) is a wholly owned special purpose subsidiary of Duke Energy Florida. DEF ProCo was formed in 2023 as the primary procurement agent for equipment, materials and supplies for Duke Energy Florida. DEF ProCo interacts with third-party suppliers on Duke Energy Florida’s behalf with credit and risk support provided by Duke Energy Florida. DEF ProCo is a qualified reseller under Florida tax law and conveys acquired assets to Duke Energy Florida through leases on each acquired asset.
This entity is considered a VIE primarily because the equity capitalization is insufficient to support their operations. Duke Energy Florida has the power to direct the significant activities of this VIE as described above and therefore Duke Energy Florida is considered the primary beneficiary and consolidates the procurement company.
The following table summarizes the impact of this VIE on Duke Energy Florida's Consolidated Balance Sheets.
(in millions)March 31, 2025
December 31, 2024
Inventory
$509 $494 
Accounts Payable
201 208 
NON-CONSOLIDATED VIEs
Natural Gas Investments
Duke Energy has investments in various joint ventures including pipeline and renewable natural gas projects. These entities are considered VIEs due to having insufficient equity to finance their own activities without subordinated financial support. Duke Energy does not have the power to direct the activities that most significantly impact the economic performance, the obligation to absorb losses or the right to receive benefits of these VIEs and therefore does not consolidate these entities.
Non-consolidated VIEs are immaterial on the Condensed Consolidated Balance Sheets and the Duke Energy Registrants are not aware of any situations where the maximum exposure to loss significantly exceeds the carrying values.
CRC
The following table shows sales and cash flows related to receivables sold and reflects CRC activity prior to its termination in March 2024.
Duke Energy Ohio
Duke Energy Indiana
Three Months EndedThree Months Ended
March 31,March 31,
(in millions)20242024
Sales
Receivables sold$474 $473 
Loss recognized on sale7 6 
Cash flows
Cash proceeds from receivables sold$478 $523 
Return received on retained interests4 4 
Cash flows from sales of receivables are reflected within Cash Flows from Operating Activities and Cash Flows from Investing Activities on Duke Energy Ohio’s and Duke Energy Indiana’s Condensed Consolidated Statements of Cash Flows.
v3.25.1
Revenue
 3 Months Ended
Mar. 31, 2025
Revenue from Contract with Customer [Abstract]  
Revenue REVENUE
Duke Energy earns substantially all of its revenues through its reportable segments, EU&I and GU&I.
Electric Utilities and Infrastructure
EU&I earns the majority of its revenues through retail and wholesale electric service through the generation, transmission, distribution and sale of electricity. Duke Energy generally provides retail and wholesale electric service customers with their full electric load requirements or with supplemental load requirements when the customer has other sources of electricity.
The majority of wholesale revenues are full requirements contracts where the customers purchase the substantial majority of their energy needs and do not have a fixed quantity of contractually required energy or capacity. As such, related forecasted revenues are considered optional purchases. Supplemental requirements contracts that include contracted blocks of energy and capacity at contractually fixed prices have the following estimated remaining performance obligations:
Remaining Performance Obligations
(in millions)20252026202720282029ThereafterTotal
Duke Energy Carolinas$9 $12 $12 $12 $— $— $45 
Progress Energy21 43 13 13 13 42 145 
Duke Energy Progress4 6 6 6 6 20 48 
Duke Energy Florida17 37 7 7 7 22 97 
Duke Energy Indiana13 17 15 5 — — 50 
Revenues for block sales are recognized monthly as energy is delivered and stand-ready service is provided, consistent with invoiced amounts and unbilled estimates.
Gas Utilities and Infrastructure
GU&I earns its revenue through retail and wholesale natural gas service through the transportation, distribution and sale of natural gas. Duke Energy generally provides retail and wholesale natural gas service customers with all natural gas load requirements. Additionally, while natural gas can be stored, substantially all natural gas provided by Duke Energy is consumed by customers simultaneously with receipt of delivery.
Fixed-capacity payments under long-term contracts for the GU&I segment include minimum margin contracts and supply arrangements with municipalities and power generation facilities. Revenues for related sales are recognized monthly as natural gas is delivered and stand-ready service is provided, consistent with invoiced amounts and unbilled estimates. Estimated remaining performance obligations are as follows:
Remaining Performance Obligations
(in millions)20252026202720282029ThereafterTotal
Piedmont$48 $51 $49 $46 $44 $151 $389 
Other
The remainder of Duke Energy’s operations is presented as Other, which does not include material revenues from contracts with customers.
Disaggregated Revenues
Disaggregated revenues are presented as follows:
Three Months Ended March 31, 2025
DukeDukeDukeDukeDuke
(in millions)DukeEnergyProgressEnergyEnergyEnergyEnergy
By market or type of customerEnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Electric Utilities and Infrastructure
   Residential$3,403 $1,127 $1,614 $820 $794 $282 $379 $— 
Commercial
1,921 701 845 415 430 142 233 — 
   Industrial823 334 267 193 74 33 187 — 
   Wholesale670 149 443 404 39 22 57 — 
   Other revenues236 180 239 163 76 18 (1)— 
Total Electric Utilities and Infrastructure revenue from contracts with customers$7,053 $2,491 $3,408 $1,995 $1,413 $497 $855 $— 
Gas Utilities and Infrastructure
   Residential$706 $— $— $— $— $186 $— $520 
   Commercial322 — — — — 70 — 252 
   Industrial55 — — — — 16 — 39 
   Power Generation— — — — — — — 24 
   Other revenues74 — — — — 6 — 53 
Total Gas Utilities and Infrastructure revenue from contracts with customers$1,157 $— $— $— $— $278 $— $888 
Other
Revenue from contracts with customers$8 $— $— $— $— $— $— $— 
Total Revenue from contracts with customers$8,218 $2,491 $3,408 $1,995 $1,413 $775 $855 $888 
Other revenue sources(a)
$31 $33 $59 $23 $31 $(9)$3 $(31)
Total operating revenues
$8,249 $2,524 $3,467 $2,018 $1,444 $766 $858 $857 
Three Months Ended March 31, 2024
DukeDukeDukeDukeDuke
(in millions)DukeEnergyProgressEnergyEnergyEnergyEnergy
By market or type of customerEnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Electric Utilities and Infrastructure
   Residential$3,115 $1,058 $1,517 $742 $775 $253 $287 $— 
Commercial
1,934 717 866 422 444 152 201 — 
   Industrial822 340 266 177 89 32 183 — 
   Wholesale554 138 355 326 29 14 48 — 
   Other revenues253 99 149 78 71 22 34 — 
Total Electric Utilities and Infrastructure revenue from contracts with customers$6,678 $2,352 $3,153 $1,745 $1,408 $473 $753 $— 
Gas Utilities and Infrastructure
   Residential$520 $— $— $— $— $147 $— $373 
   Commercial240 — — — — 57 — 183 
   Industrial47 — — — — 11 — 38 
   Power Generation— — — — — — — 8 
   Other revenues40 — — — — 5 — 35 
Total Gas Utilities and Infrastructure revenue from contracts with customers$847 $— $— $— $— $220 $— $637 
Other
Revenue from contracts with customers$7 $— $— $— $— $— $— $— 
Total Revenue from contracts with customers$7,532 $2,352 $3,153 $1,745 $1,408 $693 $753 $637 
Other revenue sources(a)
$139 $55 $75 $43 $28 $(15)$6 $39 
Total operating revenues
$7,671 $2,407 $3,228 $1,788 $1,436 $678 $759 $676 
(a)Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues
The following table presents the reserve for credit losses for trade and other receivables.
Three Months Ended March 31, 2024 and 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Balance at December 31, 2023$205 $56 $74 $44 $31 $9 $5 $11 
Write-Offs(32)(12)(16)(7)(9)— — (1)
Credit Loss Expense10 7 9 4 5 1 2 2 
Other Adjustments21 11 6 6 — 31 9 — 
Balance at March 31, 2024$204 $62 $73 $47 $27 $41 $16 $12 
Balance at December 31, 2024$209 $69 $73 $44 $29 $43 $15 $10 
Write-Offs(29)(14)(15)(8)(7)— — — 
Credit Loss Expense14 5 8 5 3 1 — — 
Other Adjustments10 4 1 1 — 2 2 — 
Balance at March 31, 2025$204 $64 $67 $42 $25 $46 $17 $10 
Trade and other receivables are evaluated based on an estimate of the risk of loss over the life of the receivable and current and historical conditions using supportable assumptions. Management evaluates the risk of loss for trade and other receivables by comparing the historical write-off amounts to total revenue over a specified period. Historical loss rates are adjusted due to the impact of current conditions, as well as forecasted conditions over a reasonable time period. The calculated write-off rate can be applied to the receivable balance for which an established reserve does not already exist. Management reviews the assumptions and risk of loss periodically for trade and other receivables.
v3.25.1
Stockholders' Equity
 3 Months Ended
Mar. 31, 2025
Equity [Abstract]  
Stockholders' Equity STOCKHOLDERS' EQUITY
Basic EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the weighted average number of common shares outstanding during the period. Diluted EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the diluted weighted average number of common shares outstanding during the period. Diluted EPS reflects the potential dilution that could occur if securities or other agreements to issue common stock, such as equity forward sale agreements or convertible debt, were exercised or settled. Duke Energy applies the if-converted method for calculating any potential dilutive effect of the conversion of the outstanding convertible notes on diluted EPS, if applicable. Duke Energy’s participating securities are restricted stock units that are entitled to dividends declared on Duke Energy common stock during the restricted stock unit’s vesting periods. Dividends declared on preferred stock are recorded on the Condensed Consolidated Statements of Operations as a reduction of net income to arrive at net income available to Duke Energy common stockholders. Dividends accumulated on preferred stock are an adjustment to net income used in the calculation of basic and diluted EPS.
The following table presents Duke Energy’s basic and diluted EPS calculations, the weighted average number of common shares outstanding and common and preferred share dividends declared.
Three Months Ended March 31,
(in millions, except per share amounts)20252024
Net Income available to Duke Energy common stockholders
$1,365 $1,099 
Less: Loss from discontinued operations attributable to Duke Energy common stockholders
— (3)
Accumulated preferred stock dividends adjustment— 12 
Less: Impact of participating securities1 2 
Income from continuing operations available to Duke Energy common stockholders$1,364 $1,112 
Loss from discontinued operations, net of tax
$— $(3)
Add: Loss attributable to NCI
— — 
Loss from discontinued operations attributable to Duke Energy common stockholders
$— $(3)
Weighted average common shares outstanding – basic and diluted
777 771 
EPS from continuing operations available to Duke Energy common stockholders
Basic and diluted(a)
$1.76 $1.44 
Potentially dilutive items excluded from the calculation(b)
2 2 
Dividends declared per common share$1.045 $1.025 
Dividends declared on Series A preferred stock per depositary share(c)
$0.359 $0.359 
Dividends declared on Series B preferred stock per share(d)
$— $24.375 
(a)The convertible notes were excluded from the calculations of diluted EPS because the effect was antidilutive.
(b)Performance stock awards were not included in the dilutive securities calculation because the performance measures related to the awards had not been met.
(c)5.75% Series A Cumulative Redeemable Perpetual Preferred Stock dividends are payable quarterly in arrears on the 16th day of March, June, September and December. The preferred stock has a $25 liquidation preference per depositary share.
(d)4.875% Series B Fixed-Rate Reset Cumulative Redeemable Perpetual Preferred Stock dividends were payable semiannually in arrears on the 16th day of March and September. The preferred stock was redeemed on September 16, 2024.
Common Stock
In November 2022, Duke Energy filed a prospectus supplement and executed an Equity Distribution Agreement (EDA) under which it may sell up to $1.5 billion of its common stock through an at-the-market (ATM) offering program, including an equity forward sales component. Under the terms of the EDA, Duke Energy may issue and sell shares of common stock through September 2025.
The following table shows ATM equity issuances pursuant to forward contracts executed during the three months ended March 31, 2025.
Tranche
Shares Priced
Initial Forward Price
1
1,710,979$116.02 
2
1,262,618$117.94 
3
1,264,410$117.79 
Total
4,238,007
The equity forwards require Duke Energy to either physically settle the transactions by issuing shares in exchange for net proceeds at the then-applicable forward sale price specified by the agreements or net settle in whole or in part through the delivery or receipt of cash or shares. The settlement alternatives are at Duke Energy's election. No amounts have or will be recorded in Duke Energy's Condensed Consolidated Financial Statements with respect to the ATM offering until settlement of the equity forwards occurs, which is expected by December 31, 2025. The initial forward sale prices will be subject to adjustment on a daily basis based on a floating interest rate factor and will decrease by other fixed amounts specified in the relevant forward sale agreements. Until settlement of the equity forwards, earnings per share dilution resulting from the agreements, if any, will be determined under the treasury stock method.
v3.25.1
Employee Benefit Plans
 3 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
Employee Benefit Plans EMPLOYEE BENEFIT PLANS
DEFINED BENEFIT RETIREMENT PLANS
Duke Energy and certain subsidiaries maintain, and the Subsidiary Registrants participate in, qualified and non-qualified, non-contributory defined benefit retirement plans. Duke Energy's policy is to fund amounts on an actuarial basis to provide assets sufficient to meet benefit payments to be paid to plan participants.
QUALIFIED PENSION PLANS
The following tables include the components of net periodic pension costs for qualified pension plans.
Three Months Ended March 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Service cost$27 $9 $7 $5 $3 $— $1 $1 
Interest cost on projected benefit obligation82 19 26 11 14 4 7 3 
Expected return on plan assets(149)(38)(55)(24)(30)(5)(10)(5)
Amortization of actuarial loss15 4 5 2 2 1 1 1 
Amortization of prior service credit(3)— — — — — — (2)
Amortization of settlement charges6 3 2 1 1 — — 1 
Net periodic pension costs$(22)$(3)$(15)$(5)$(10)$— $(1)$(1)
Three Months Ended March 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Service cost$28 $9 $8 $5 $3 $1 $2 $1 
Interest cost on projected benefit obligation82 20 26 12 14 4 6 2 
Expected return on plan assets(154)(41)(54)(25)(29)(6)(10)(5)
Amortization of actuarial loss8 2 2 1 1 — 1 1 
Amortization of prior service credit(3)— — — — — — (2)
Amortization of settlement charges5 2 1 1 — — — 1 
Net periodic pension costs$(34)$(8)$(17)$(6)$(11)$(1)$(1)$(2)
NON-QUALIFIED PENSION PLANS
Net periodic pension costs for non-qualified pension plans were not material for the three months ended March 31, 2025, and 2024.
OTHER POST-RETIREMENT BENEFIT PLANS
Net periodic costs for OPEB plans were not material for the three months ended March 31, 2025, and 2024.
v3.25.1
Income Taxes
 3 Months Ended
Mar. 31, 2025
Income Tax Disclosure [Abstract]  
Income Taxes INCOME TAXES
The IRA established transferability markets for tax credits including nuclear PTCs, solar PTCs and ITCs. In April 2025, agreements were executed for the sale of approximately $643 million in net tax credits under the IRA. The sale primarily includes estimated nuclear PTCs of $478 million at Duke Energy Carolinas and $69 million at Duke Energy Progress, as well as estimated solar PTCs of $58 million at Duke Energy Florida to be earned through the end of 2025. Proceeds for the sale of the nuclear PTCs are expected to be received in November 2025.
EFFECTIVE TAX RATES
The ETRs from continuing operations for each of the Duke Energy Registrants are included in the following table.
Three Months Ended
March 31,
20252024
Duke Energy12.1 %13.4 %
Duke Energy Carolinas9.0 %11.5 %
Progress Energy16.8 %16.5 %
Duke Energy Progress14.5 %15.0 %
Duke Energy Florida19.9 %19.4 %
Duke Energy Ohio18.0 %16.8 %
Duke Energy Indiana12.5 %17.3 %
Piedmont20.7 %19.6 %
The decrease in the ETR for Duke Energy for the three months ended March 31, 2025, was primarily due to an increase in the amortization of income tax credits.
The decrease in the ETR for Duke Energy Carolinas for the three months ended March 31, 2025, was primarily due to an increase in the amortization of income tax credits.
The increase in the ETR for Duke Energy Ohio for the three months ending March 31, 2025, was primarily due to a decrease in the amortization of EDIT.
The decrease in the ETR for Duke Energy Indiana for the three months ended March 31, 2025, was primarily due to an increase in the amortization of EDIT.
The increase in the ETR for Piedmont for the three months ending March 31, 2025, was primarily due to a decrease in the amortization of EDIT.
v3.25.1
Pay vs Performance Disclosure - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Pay vs Performance Disclosure    
Net Income Attributable to Duke Energy Corporation $ 1,379 $ 1,138
v3.25.1
Insider Trading Arrangements
 3 Months Ended
Mar. 31, 2025
Trading Arrangements, by Individual  
Rule 10b5-1 Arrangement Adopted false
Non-Rule 10b5-1 Arrangement Adopted false
Rule 10b5-1 Arrangement Terminated false
Non-Rule 10b5-1 Arrangement Terminated false
v3.25.1
Organization and Basis of Presentation (Policy)
 3 Months Ended
Mar. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Basis of Presentation
BASIS OF PRESENTATION
These Condensed Consolidated Financial Statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Regulation S-X. Accordingly, these Condensed Consolidated Financial Statements do not include all information and notes required by GAAP for annual financial statements and should be read in conjunction with the Consolidated Financial Statements in Duke Energy's Annual Report on Form 10-K for the year ended December 31, 2024.
The information in these combined notes relates to each of the Duke Energy Registrants as noted in the Index to Combined Notes to Condensed Consolidated Financial Statements. However, none of the registrants make any representations as to information related solely to Duke Energy or the subsidiaries of Duke Energy other than itself.
These Condensed Consolidated Financial Statements, in the opinion of the respective companies’ management, reflect all normal recurring adjustments necessary to fairly present the financial position and results of operations of each of the Duke Energy Registrants. Amounts reported in Duke Energy’s interim Condensed Consolidated Statements of Operations and each of the Subsidiary Registrants’ interim Condensed Consolidated Statements of Operations and Comprehensive Income are not necessarily indicative of amounts expected for the respective annual periods due to effects of seasonal temperature variations on energy consumption, regulatory rulings, timing of maintenance on electric generating units, changes in mark-to-market valuations, changing commodity prices and other factors.
In preparing financial statements that conform to GAAP, management must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.
Basis of Consolidation and Noncontrolling Interest
BASIS OF CONSOLIDATION
These Condensed Consolidated Financial Statements include, after eliminating intercompany transactions and balances, the accounts of the Duke Energy Registrants and subsidiaries or VIEs where the respective Duke Energy Registrants have control. See Note 12 for additional information on VIEs. These Condensed Consolidated Financial Statements also reflect the Duke Energy Registrants’ proportionate share of certain jointly owned generation and transmission facilities.
Discontinued Operations
Discontinued Operations
Duke Energy has elected to present cash flows of discontinued operations combined with cash flows of continuing operations. Unless otherwise noted, the notes to these condensed consolidated financial statements exclude amounts related to discontinued operations for all periods presented. A portion of NCI on Duke Energy's Condensed Consolidated Balance Sheet as of December 31, 2024, relates to discontinued operations. See Note 2 for discussion of discontinued operations related to the Commercial Renewables Disposal Groups.
Cash, Cash Equivalents, and Restricted Cash
CASH, CASH EQUIVALENTS AND RESTRICTED CASH
Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress and Duke Energy Florida have restricted cash balances related primarily to collateral assets, escrow deposits and VIEs. See Notes 10 and 12 for additional information. Restricted cash amounts are included in Other within Current Assets and Other Noncurrent Assets on the Condensed Consolidated Balance Sheets.
New Accounting Standards
NEW ACCOUNTING STANDARDS
No new accounting standards were adopted by the Duke Energy Registrants in 2025.
Environmental Costs Liabilities are recorded when losses become probable and are reasonably estimable.Costs are typically expensed as Operation, maintenance and other on the Condensed Consolidated Statements of Operations unless regulatory recovery of the costs is deemed probable.
Derivatives
Duke Energy’s interest rate swaps for its regulated operations employ regulatory accounting. With regulatory accounting, the mark-to-market gains or losses on the swaps are deferred as regulatory liabilities or regulatory assets, respectively. Regulatory assets and liabilities are amortized consistent with the treatment of the related costs in the ratemaking process. The accrual of interest on the swaps is recorded as Interest Expense on the Duke Energy Registrant's Condensed Consolidated Statements of Operations and Comprehensive Income.
Undesignated Contracts
For the Subsidiary Registrants, bulk power electricity and natural gas purchases flow through fuel adjustment clauses, formula-based contracts or other cost-sharing mechanisms. Differences between the costs included in rates and the incurred costs, including undesignated derivative contracts, are largely deferred as regulatory assets or regulatory liabilities. Piedmont policies allow for the use of financial instruments to hedge commodity price risks. The strategy and objective of these hedging programs are to use the financial instruments to reduce natural gas cost volatility for customers.
Investments As a result, the ability to hold investments in unrealized loss positions is outside the control of the Duke Energy Registrants. Accordingly, all unrealized losses associated with debt securities within the Investment Trusts are recognized immediately and deferred to regulatory accounts where appropriate.Unrealized gains and losses on all other AFS securities are included in other comprehensive income until realized, unless it is determined the carrying value of an investment has a credit loss. The Duke Energy Registrants analyze all investment holdings each reporting period to determine whether a decline in fair value is related to a credit loss. If a credit loss exists, the unrealized credit loss is included in earnings.
Revenue from Contract with Customer Duke Energy earns substantially all of its revenues through its reportable segments, EU&I and GU&I.
Earnings Per Share
Basic EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the weighted average number of common shares outstanding during the period. Diluted EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the diluted weighted average number of common shares outstanding during the period. Diluted EPS reflects the potential dilution that could occur if securities or other agreements to issue common stock, such as equity forward sale agreements or convertible debt, were exercised or settled. Duke Energy applies the if-converted method for calculating any potential dilutive effect of the conversion of the outstanding convertible notes on diluted EPS, if applicable. Duke Energy’s participating securities are restricted stock units that are entitled to dividends declared on Duke Energy common stock during the restricted stock unit’s vesting periods. Dividends declared on preferred stock are recorded on the Condensed Consolidated Statements of Operations as a reduction of net income to arrive at net income available to Duke Energy common stockholders. Dividends accumulated on preferred stock are an adjustment to net income used in the calculation of basic and diluted EPS.
Accounts Payable
ACCOUNTS PAYABLE
Duke Energy has a voluntary supply chain finance program (the “program”) that allows Duke Energy suppliers, at their sole discretion, to sell their receivables from Duke Energy to a global financial institution at a rate that leverages Duke Energy’s credit rating and which may result in favorable terms compared to the rate available to the supplier on their own credit rating. Suppliers participating in the program determine at their sole discretion which invoices they will sell to the financial institution. Suppliers’ decisions on which invoices are sold do not impact Duke Energy’s payment terms which are based on commercial terms negotiated between Duke Energy and the supplier regardless of program participation. The commercial terms negotiated between Duke Energy and its suppliers are consistent regardless of whether the supplier elects to participate in the program. Duke Energy does not issue any guarantees with respect to the program and does not participate in negotiations between suppliers and the financial institution. Duke Energy does not have an economic interest in the supplier’s decision to participate in the program and receives no interest, fees or other benefit from the financial institution based on supplier participation in the program.
v3.25.1
Organization and Basis of Presentation (Tables)
 3 Months Ended
Mar. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Cash, Cash Equivalents and Restricted Cash The following table presents the components of cash, cash equivalents and restricted cash included in the Condensed Consolidated Balance Sheets.
March 31, 2025December 31, 2024
DukeDukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyDukeEnergyProgressEnergyEnergy
EnergyCarolinasEnergyProgressFlorida
Energy
CarolinasEnergyProgressFlorida
Current Assets
Cash and cash equivalents$475 $46 $87 $53 $16 $314 $6 $73 $24 $33 
Other39 6 34 23 10 84 9 76 40 35 
Other Noncurrent Assets
Other22 1 11 5 7 20 1 11 5 7 
Total cash, cash equivalents and restricted cash$536 $53 $132 $81 $33 $418 $16 $160 $69 $75 
Schedule of Utility Inventory The components of inventory are presented in the tables below.
 March 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions) EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Materials and supplies $3,413 $1,133 $1,677 $1,090 $586 $155 $399 $12 
Coal700 309 233 137 96 18 140 — 
Natural gas, oil and other fuel305 46 197 106 91 11 2 49 
Total inventory $4,418 $1,488 $2,107 $1,333 $773 $184 $541 $61 
 December 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions) EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Materials and supplies $3,387 $1,150 $1,649 $1,074 $576 $149 $389 $11 
Coal801 341 241 164 77 23 196 — 
Natural gas, oil and other fuel321 45 196 103 92 11 1 67 
Total inventory $4,509 $1,536 $2,086 $1,341 $745 $183 $586 $78 
Schedule of Accounts Payable Finance Programs
The following table presents the amounts included within Accounts payable on the Condensed Consolidated Balance Sheets sold to the financial institution by our suppliers and the supplier invoices sold to the financial institution under the program included within Net cash provided by operating activities on the Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2025, and 2024.
Three Months Ended March 31, 2024 and 2025
Duke
DukeProgressEnergy
(in millions)EnergyEnergyFloridaPiedmont
Confirmed obligations outstanding at December 31, 2023
$50 $3 $3 $47 
Invoices confirmed during the period57 1 1 56 
Confirmed invoices paid during the period(31)(2)(2)(29)
Confirmed obligations outstanding at March 31, 2024
$76 $2 $2 $74 
Confirmed obligations outstanding at December 31, 2024
$13 $1 $1 $12 
Invoices confirmed during the period18 — — 18 
Confirmed invoices paid during the period(13)(1)(1)(12)
Confirmed obligations outstanding at March 31, 2025
$18 $— $— $18 
v3.25.1
Dispositions (Tables)
 3 Months Ended
Mar. 31, 2025
Discontinued Operations and Disposal Groups [Abstract]  
Disposal Groups, Including Discontinued Operations
The following table presents the carrying values of the major classes of Assets held for sale and Liabilities associated with assets held for sale included in Duke Energy's Condensed Consolidated Balance Sheets.
(in millions)March 31, 2025December 31, 2024
Current Assets Held for Sale
Other$— $4 
Total current assets held for sale— 4 
Noncurrent Assets Held for Sale
Property, Plant and Equipment
Cost— 109 
Accumulated depreciation and amortization— (24)
Net property, plant and equipment— 85 
Operating lease right-of-use assets, net— 4 
Total other noncurrent assets held for sale— 4 
Total Assets Held for Sale$— $93 
Current Liabilities Associated with Assets Held for Sale
Accounts payable$18 $19 
Taxes accrued— 1 
Current maturities of long-term debt— 43 
Unrealized losses on commodity hedges
— 13 
Other— 4 
Total current liabilities associated with assets held for sale18 80 
Noncurrent Liabilities Associated with Assets Held for Sale
Operating lease liabilities— 5 
Asset retirement obligations— 5 
Unrealized losses on commodity hedges
— 66 
Other— 13 
Total other noncurrent liabilities associated with assets held for sale— 89 
Total Liabilities Associated with Assets Held for Sale$18 $169 
As of March 31, 2025, the remaining held for sale liability balance relates to Disposal Group assets previously sold and is expected to settle by December 31, 2025.
As of December 31, 2024, the noncontrolling interest balance is $18 million.
The following table presents the results of the Commercial Renewables Disposal Groups, which are included in Loss from Discontinued Operations, net of tax in Duke Energy's Condensed Consolidated Statements of Operations.
Three Months Ended
March 31,
(in millions)20252024
Operating revenues$4 $(6)
Operation, maintenance and other1 4
Interest expense— 2
Loss (Gain) on disposal
4 (10)
Loss before income taxes(1)(2)
Income tax (benefit) expense
(1)1 
Net loss from discontinued operations attributable to Duke Energy Corporation
$— $(3)
The following table summarizes Duke Energy's cash flows from discontinued operations related to the Commercial Renewables Disposal Groups.
Three Months Ended
March 31,
(in millions)20252024
Cash flows used in:
Operating activities$(3)$(3)
v3.25.1
Business Segments (Tables)
 3 Months Ended
Mar. 31, 2025
Segment
segment
Segment Reporting Information [Line Items]  
Business Segment Data
Business segment information is presented in the following tables. Segment assets presented exclude intercompany assets.
Three Months Ended March 31, 2025
ElectricGasTotal
Utilities andUtilities andReportable
(in millions)InfrastructureInfrastructureSegmentsOtherEliminationsTotal
Unaffiliated revenues$7,125 $1,116 $8,241 $8 $— $8,249 
Intersegment revenues15 24 39 34 (73)— 
Total operating revenues
$7,140 $1,140 $8,280 $42 $(73)$8,249 
Less:
Fuel used in electric generation and purchased power$2,119 $— $2,119 $— $(20)$2,099 
Cost of natural gas— 374 374 — — 374 
Operation, maintenance and other1,424 125 1,549 2 (52)1,499 
Depreciation and amortization1,334 107 1,441 77 (6)1,512 
Property and other taxes378 47 425 3 — 428 
Interest expense530 65 595 318 (24)889 
Income tax expense (benefit)189 91 280 (87)— 193 
Other Segment Items— 
Noncontrolling interests(a)
25 — 25 — — 25 
Preferred dividends— — — 14 — 14 
Add: Equity in earnings of unconsolidated affiliates
— 5 5 6 — 11 
Add: Other(b)
135 13 148 19 (29)138 
Segment income (loss)
$1,276 $349 $1,625 $(260)$— $1,365 
Net income available to Duke Energy Corporation Common Stockholders
$1,365 
Add back: Net income attributable to noncontrolling interest
25 
Add back: Preferred dividends
14 
Net Income
$1,404 
Capital investments expenditures and acquisitions$2,814 $249 $3,063 $85 $— $3,148 
Segment assets
164,794 18,233 183,027 4,449 — 187,476 
Three Months Ended March 31, 2024
ElectricGasTotal
Utilities andUtilities andReportable
(in millions)InfrastructureInfrastructureSegmentsOtherEliminationsTotal
Unaffiliated revenues$6,785 $879 $7,664 $7 $— $7,671 
Intersegment revenues18 23 41 31 (72)— 
Total operating revenues
$6,803 $902 $7,705 $38 $(72)$7,671 
Less:
Fuel used in electric generation and purchased power$2,355 $— $2,355 $— $(20)$2,335 
Cost of natural gas— 232 232 — — 232 
Operation, maintenance and other1,317 129 1,446 (18)(48)1,380 
Depreciation and amortization1,225 98 1,323 71 (7)1,387 
Property and other taxes337 46 383 3 — 386 
Interest expense499 61 560 294 (37)817 
Income tax expense (benefit)173 69 242 (64)— 178 
Other Segment Items
Noncontrolling interests(a)
13 — 13 — — 13 
Preferred dividends— — — 39 — 39 
Add: Equity in earnings of unconsolidated affiliates
1 — 1 17 (1)17 
Add: Other(b)
136 17 153 67 (39)181 
Segment income (loss)
$1,021 $284 $1,305 $(203)$— $1,102 
Discontinued Operations
(3)
Net income available to Duke Energy Corporation Common Stockholders
$1,099 
Add back: Net Income available to noncontrolling interest
13 
Add back: Preferred dividends
39 
Net Income
$1,151 
Capital investments expenditures and acquisitions$2,746 $382 $3,128 $87 $— $3,215 
Segment assets
156,606 17,464 174,070 4,600 — 178,670 
(a)Net income attributable to NCI related to continuing operations.
(b)    Other for EU&I and GU&I includes Gains on sales of other assets and other, net, and Other income and expenses, net.
Number of reportable segments 2
Duke Energy Ohio  
Segment Reporting Information [Line Items]  
Business Segment Data
Duke Energy Ohio has two reportable segments, EU&I and GU&I. The remainder of Duke Energy Ohio's operations is presented as Other.
Three Months Ended March 31, 2025
ElectricGasTotal
Utilities andUtilities andReportable
Eliminations/
(in millions)InfrastructureInfrastructureSegmentsOtherTotal
Total operating revenues
$487 $279 $766 $— $766 
Less:
Fuel used in electric generation and purchased power$149 $— $149 $— $149 
Cost of natural gas— 101 101 — 101 
Operation, maintenance and other92 29 121 3 124 
Depreciation and amortization76 36 112 — 112 
Property and other taxes86 30 116 — 116 
Interest expense31 16 47 — 47 
Income tax expense (benefit)9 14 23 (1)22 
Add: Other segment items(a)
4 2 6 (1)5 
Segment income (loss) / Net income
$48 $55 $103 $(3)$100 
Capital expenditures$157 $67 $224 $— $224 
Segment assets8,303 4,524 12,827 53 12,880 
Three Months Ended March 31, 2024
ElectricGasTotal
Utilities andUtilities andReportable
Eliminations/
(in millions)InfrastructureInfrastructureSegmentsOtherTotal
Total operating revenues
$458 $220 $678 $— $678 
Less:
Fuel used in electric generation and purchased power$138 $— $138 — $138 
Cost of natural gas— 61 61 — 61 
Operation, maintenance and other93 32 125 1 126 
Depreciation and amortization66 33 99 — 99 
Property and other taxes71 31 102 — 102 
Interest expense29 15 44 1 45 
Income tax expense (benefit)10 9 19 — 19 
Add: Other segment items(a)
4 2 6 — 6 
Segment income (loss) / Net income
$55 $41 $96 $(2)$94 
Capital expenditures$137 $80 $217 $— $217 
Segment assets7,935 4,350 12,285 20 12,305 
(a)    Other segment items for EU&I and GU&I include Gains on sales of other assets and other, net, and Other income and expenses, net.
Number of reportable segments | segment 2
Duke Energy Carolinas  
Segment Reporting Information [Line Items]  
Business Segment Data
Duke Energy Carolinas has one reportable segment, EU&I. The remainder of Duke Energy Carolinas' operations is presented as Other.
Three Months Ended March 31, 2025
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$2,524 $— $2,524 
Less:
Fuel used in electric generation and purchased power$803 $— $803 
Operation, maintenance and other474 10 484 
Depreciation and amortization432 — 432 
Property and other taxes102 — 102 
Interest expense200 — 200 
Income tax expense (benefit)53 (2)51 
Add: Other segment items(a)
61 — 61 
Segment income (loss) / Net income$521 $(8)$513 
Capital expenditures$1,019 $— $1,019 
Segment assets55,035 377 55,412 
Three Months Ended March 31, 2024
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$2,407 $— $2,407 
Less:
Fuel used in electric generation and purchased power$860 $— $860 
Operation, maintenance and other441 11 452 
Depreciation and amortization397 — 397 
Property and other taxes94 — 94 
Interest expense180 — 180 
Income tax expense (benefit)58 (2)56 
Add: Other segment items(a)
62 — 62 
Segment income (loss) / Net income$439 $(9)$430 
Capital expenditures$952 $— $952 
Segment assets52,487 205 52,692 
(a)    Other segment items include Gains on sales of other assets and other, net, and Other income and expenses, net.
Number of reportable segments 1
Progress Energy  
Segment Reporting Information [Line Items]  
Business Segment Data
Progress Energy has one reportable segment, EU&I. The remainder of Progress Energy's operations is presented as Other.
Three Months Ended March 31, 2025
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$3,462 $5 $3,467 
Less:
Fuel used in electric generation and purchased power$1,106 $— $1,106 
Operation, maintenance and other673 15 688 
Depreciation and amortization631 — 631 
Property and other taxes172 — 172 
Interest expense246 29 275 
Income tax expense (benefit)118 (8)110 
Add: Other segment items(a)
61 — 61 
Segment income (loss) / Net income$577 $(31)$546 
Capital expenditures$1,409 $— $1,409 
Segment assets68,341 5,004 73,345 
Three Months Ended March 31, 2024
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$3,224 $4 $3,228 
Less:
Fuel used in electric generation and purchased power$1,143 $— $1,143 
Operation, maintenance and other616 12 628 
Depreciation and amortization587 — 587 
Property and other taxes157 1 158 
Interest expense231 29 260 
Income tax expense (benefit)95 (9)86 
Add: Other segment items(a)
61 8 69 
Segment income (loss) / Net income$456 $(21)$435 
Capital expenditures$1,373 $— $1,373 
Segment assets63,861 3,861 67,722 
(a)    Other segment items include Gains on sales of other assets and other, net, and Other income and expenses, net.
Number of reportable segments 1
Duke Energy Progress  
Segment Reporting Information [Line Items]  
Business Segment Data
Duke Energy Progress has one reportable segment, EU&I. The remainder of Duke Energy Progress' operations is presented as Other.
Three Months Ended March 31, 2025
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$2,018 $— $2,018 
Less:
Fuel used in electric generation and purchased power$725 $— $725 
Operation, maintenance and other391 7 398 
Depreciation and amortization357 — 357 
Property and other taxes60 — 60 
Interest expense128 — 128 
Income tax expense (benefit)58 (2)56 
Add: Other segment items(a)
39 (2)37 
Segment income (loss) / Net income$338 $(7)$331 
Capital expenditures$849 $— $849 
Segment assets39,788 1,089 40,877 
Three Months Ended March 31, 2024
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$1,788 $— $1,788 
Less:
Fuel used in electric generation and purchased power$620 $— $620 
Operation, maintenance and other369 6 375 
Depreciation and amortization339 — 339 
Property and other taxes51 — 51 
Interest expense120 — 120 
Income tax expense (benefit)50 (2)48 
Add: Other segment items(a)
36 1 37 
Segment income (loss) / Net income$275 $(3)$272 
Capital expenditures$704 $— $704 
Segment assets37,390 104 37,494 
(a)    Other segment items include Gains on sales of other assets and other, net, and Other income and expenses, net.
Number of reportable segments 1
Duke Energy Florida  
Segment Reporting Information [Line Items]  
Business Segment Data
Duke Energy Florida has one reportable segment, EU&I. The remainder of Duke Energy Florida's operations is presented as Other.
Three Months Ended March 31, 2025
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$1,444 $— $1,444 
Less:
Fuel used in electric generation and purchased power$381 $— $381 
Operation, maintenance and other282 4 286 
Depreciation and amortization274 — 274 
Property and other taxes112 — 112 
Interest expense118 — 118 
Income tax expense (benefit)60 (2)58 
Add: Other segment items(a)
22 (3)19 
Segment income (loss) / Net income$239 $(5)$234 
Capital expenditures$559 $— $559 
Segment assets28,553 187 28,740 
Three Months Ended March 31, 2024
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$1,436 $— $1,436 
Less:
Fuel used in electric generation and purchased power$523 $— $523 
Operation, maintenance and other247 4 251 
Depreciation and amortization248 — 248 
Property and other taxes106 — 106 
Interest expense111 — 111 
Income tax expense (benefit)45 (2)43 
Add: Other segment items(a)
25 — 25 
Segment income (loss) / Net income$181 $(2)$179 
Capital expenditures$669 $— $669 
Segment assets26,471 27 26,498 
(a)    Other segment items include Gains on sales of other assets and other, net, and Other income and expenses, net.
Number of reportable segments 1
Duke Energy Indiana  
Segment Reporting Information [Line Items]  
Business Segment Data
Duke Energy Indiana has one reportable segment, EU&I. The remainder of Duke Energy Indiana's operations is presented as Other.
Three Months Ended March 31, 2025
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$858 $— $858 
Less:
Fuel used in electric generation and purchased power$260 $— $260 
Operation, maintenance and other193 2 195 
Depreciation and amortization192 — 192 
Property and other taxes18 — 18 
Interest expense60 (1)59 
Income tax expense (benefit)18 — 18 
Add: Other segment items(a)
10 — 10 
Segment income (loss) / Net income$127 $(1)$126 
Capital expenditures$234 $— $234 
Segment assets15,782 8 15,790 
Three Months Ended March 31, 2024
Electric
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$759 $— $759 
Less:
Fuel used in electric generation and purchased power$271 $— $271 
Operation, maintenance and other178 2 180 
Depreciation and amortization169 — 169 
Property and other taxes14 — 14 
Interest expense57 — 57 
Income tax expense (benefit)14 — 14 
Add: Other segment items(a)
13 — 13 
Segment income (loss) / Net income$69 $(2)$67 
Capital expenditures$275 $— $275 
Segment assets14,921 19 14,940 
(a)    Other segment items include Gains on sales of other assets and other, net, and Other income and expenses, net.
Number of reportable segments 1
Piedmont  
Segment Reporting Information [Line Items]  
Business Segment Data
Piedmont has one reportable segment, GU&I. The remainder of Piedmont's operations is presented as Other.
Three Months Ended March 31, 2025
Gas
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$857 $— $857 
Less:
Cost of natural gas$272 $— $272 
Operation, maintenance and other94 2 96 
Depreciation and amortization70 — 70 
Property and other taxes18 — 18 
Interest expense47 — 47 
Income tax expense (benefit)76 — 76 
Other Segment Items
Add: Equity in earnings of unconsolidated affiliates— 2 2 
Add: Other(a)
11 — 11 
Segment income (loss) / Net income$291 $— $291 
Capital expenditures$182 $— $182 
Segment assets11,818 91 11,909 
Three Months Ended March 31, 2024
Gas
Utilities andEliminations/
(in millions)InfrastructureOtherTotal
Total operating revenues
$676 $— $676 
Less:
Cost of natural gas$170 $— $170 
Operation, maintenance and other95 — 95 
Depreciation and amortization62 — 62 
Property and other taxes15 — 15 
Interest expense45 — 45 
Income tax expense (benefit)59 1 60 
Other Segment Items
Add: Equity in earnings of unconsolidated affiliates— 2 2 
Add: Other(a)
15 — 15 
Segment income (loss) / Net income$245 $1 $246 
Capital expenditures$294 $— $294 
Segment assets11,099 93 11,192 
(a)    Other includes Gains on sales of other assets and other, net, and Other income and expenses, net.
Number of reportable segments 1
v3.25.1
Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2025
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Reserves
The following table contains information regarding reserves for probable and estimable costs related to the various environmental sites. These reserves are recorded in Accounts Payable within Other Current Liabilities and Other within Other Noncurrent Liabilities on the Condensed Consolidated Balance Sheets.
(in millions)March 31, 2025December 31, 2024
Reserves for Environmental Remediation
Duke Energy$68 $73 
Duke Energy Carolinas24 24 
Progress Energy19 19 
Duke Energy Progress9 9 
Duke Energy Florida10 10 
Duke Energy Ohio16 21 
Duke Energy Indiana2 2 
Piedmont6 7 
v3.25.1
Debt and Credit Facilities (Tables)
 3 Months Ended
Mar. 31, 2025
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
The following table summarizes significant debt issuances (in millions).
Three Months Ended March 31, 2025
DukeDuke
MaturityInterestDukeEnergyEnergy
Issuance DateDateRateEnergyCarolinasProgress
First Mortgage Bonds
January 2025(a)
March 2030
4.85 %$400 $400 $— 
January 2025(a)
March 2035
5.25 %700 700 — 
March 2025(b)
March 2027
4.35 %500 — 500 
March 2025(b)
March 2035
5.05 %850 — 850 
March 2025(b)
March 2055
5.55 %750 — 750 
Total issuances$3,200 $1,100 $2,100 
(a)Proceeds were used to pay off the $500 million DERF accounts receivable securitization facility due January 2025, to pay off short-term debt and for general company purposes.
(b)Proceeds were used to pay off the $400 million DEPR accounts receivable securitization facility due April 2025, to pay off short-term debt and for general company purposes.
The following table shows the significant components of Current maturities of long-term debt on the Condensed Consolidated Balance Sheets. The Duke Energy Registrants currently anticipate satisfying these obligations with cash on hand and proceeds from additional borrowings.
(in millions)Maturity DateInterest RateMarch 31, 2025
Unsecured Debt
Duke Energy (Parent)April 20253.364 %$420 
Duke Energy (Parent)April 20253.950 %250 
Duke Energy OhioJune 20256.900 %150 
Duke Energy (Parent)September 20250.900 %650 
Piedmont
September 20253.600 %150 
Duke Energy Florida Term Loan Facility(a)
October 20255.068 %800 
Duke Energy Ohio(b)
October 20253.230 %95 
Duke Energy (Parent)December 20255.000 %500 
First Mortgage Bonds
Duke Energy Florida(a)(c)
October 2073
4.282 %200 
Duke Energy Florida(a)(c)
April 20744.282 %173 
Duke Energy ProgressAugust 20253.250 %500 
Other(d)
292 
Current maturities of long-term debt$4,180 
(a)Debt has a floating interest rate.
(b)Current maturity relates to Duke Energy Kentucky.
(c)These first mortgage bonds are classified as Current maturities of long-term debt on the Condensed Consolidated Balance Sheets based on terms of the indentures, which could require repayment in less than 12 months if exercised by the bondholders.
(d)Includes finance lease obligations, amortizing debt, tax-exempt bonds with mandatory put options and small bullet maturities.
Schedule of Line of Credit Facilities
The table below includes the current borrowing sublimits and available capacity under these credit facilities.
March 31, 2025
DukeDukeDukeDukeDukeDuke
DukeEnergyEnergyEnergyEnergyEnergyEnergy
(in millions)Energy(Parent)CarolinasProgressFloridaOhioIndianaPiedmont
Facility size(a)
$10,000 $2,525 $1,300 $1,675 $1,425 $1,075 $950 $1,050 
Reduction to backstop issuances
Commercial paper(b)
(2,103)(1,381)(300)(150)— (52)(152)(68)
Outstanding letters of credit(10)(2)(4)(1)(3)— — — 
Tax-exempt bonds(81)— — — — — (81)— 
Available capacity under the Master Credit Facility$7,806 $1,142 $996 $1,524 $1,422 $1,023 $717 $982 
(a)Represents the sublimit of each borrower.
(b)Duke Energy issued $625 million of commercial paper and loaned the proceeds through the money pool to Duke Energy Carolinas, Duke Energy Progress, Duke Energy Ohio and Duke Energy Indiana. The balances are classified as Long-Term Debt Payable to Affiliated Companies on the Condensed Consolidated Balance Sheets.
v3.25.1
Related Party Transactions (Tables)
 3 Months Ended
Mar. 31, 2025
Related Party Transactions [Abstract]  
Schedule of Related Party Transactions, Other Revenue and Expense Transactions with related parties included on the Condensed Consolidated Statements of Operations and Comprehensive Income are presented in the following table.
Three Months Ended March 31,
(in millions)20252024
Duke Energy Carolinas
Corporate governance and shared service expenses(a)
$178 $214 
Indemnification coverages(b)
13 11 
JDA revenue(c)
82 16 
JDA expense(c)
116 40 
Intercompany natural gas purchases(d)
2 4 
Progress Energy
Corporate governance and shared service expenses(a)
$150 $188 
Indemnification coverages(b)
16 14 
JDA revenue(c)
116 40 
JDA expense(c)
82 16 
Intercompany natural gas purchases(d)
19 19 
Duke Energy Progress
Corporate governance and shared service expenses(a)
$86 $114 
Indemnification coverages(b)
7 6 
JDA revenue(c)
116 40 
JDA expense(c)
82 16 
Intercompany natural gas purchases(d)
19 19 
Duke Energy Florida
Corporate governance and shared service expenses(a)
$64 $74 
Indemnification coverages(b)
9 8 
Duke Energy Ohio
Corporate governance and shared service expenses(a)
$64 $77 
Indemnification coverages(b)
1 2 
Duke Energy Indiana
Corporate governance and shared service expenses(a)
$71 $102 
Indemnification coverages(b)
2 2 
Piedmont
Corporate governance and shared service expenses(a)
$31 $41 
Indemnification coverages(b)
1 1 
Intercompany natural gas sales(d)
21 23 
Natural gas storage and transportation costs(e)
5 6 
(a)The Subsidiary Registrants are charged their proportionate share of corporate governance and other shared services costs, primarily related to human resources, employee benefits, information technology, legal and accounting fees, as well as other third-party costs. These amounts are primarily recorded in Operation, maintenance and other and Impairment of assets and other charges on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(b)The Subsidiary Registrants incur expenses related to certain indemnification coverages through Bison, Duke Energy’s wholly owned captive insurance subsidiary. These expenses are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(c)Duke Energy Carolinas and Duke Energy Progress participate in a JDA, which allows the collective dispatch of power plants between the service territories to reduce customer rates. Revenues from the sale of power and expenses from the purchase of power pursuant to the JDA are recorded in Operating Revenues and Fuel used in electric generation and purchased power, respectively, on the Condensed Consolidated Statements of Operations and Comprehensive Income.
(d)Piedmont provides long-term natural gas delivery service to certain Duke Energy Carolinas and Duke Energy Progress natural gas-fired generation facilities. Piedmont records the sales in Operating Revenues, and Duke Energy Carolinas and Duke Energy Progress record the related purchases as a component of Fuel used in electric generation and purchased power on their respective Condensed Consolidated Statements of Operations and Comprehensive Income.
(e)Piedmont has related party transactions as a customer of its equity method investments in Pine Needle LNG Company, LLC, Hardy Storage Company, LLC and Cardinal Pipeline Company, LLC natural gas storage and transportation facilities. These expenses are included in Cost of natural gas on Piedmont's Condensed Consolidated Statements of Operations and Comprehensive Income.The following table includes the balance of intercompany income tax receivables and payables for the Subsidiary Registrants.
DukeDukeDukeDukeDuke
EnergyProgressEnergyEnergyEnergyEnergy
(in millions)CarolinasEnergyProgressFloridaOhioIndianaPiedmont
March 31, 2025
Intercompany income tax payable$53 $55 $14 $40 $35 $31 $87 
December 31, 2024
Intercompany income tax receivable$— $— $— $154 $— $— $— 
Intercompany income tax payable419 169 315 — 43 110 43 
v3.25.1
Derivatives and Hedging (Tables)
 3 Months Ended
Mar. 31, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Notional Amounts of Outstanding Derivative Positions
The following tables show notional amounts of outstanding derivatives related to interest rate risk.
March 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaIndianaOhio
Cash flow hedges$2,975 $— $— $— $— $— $— 
Undesignated contracts3,527 1,425 1,625 500 1,125 450 27 
Total notional amount$6,502 $1,425 $1,625 $500 $1,125 $450 $27 
December 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaIndianaOhio
Cash flow hedges$2,825 $— $— $— $— $— $— 
Undesignated contracts3,202 1,150 1,775 1,125 650 250 27 
Total notional amount$6,027 $1,150 $1,775 $1,125 $650 $250 $27 
The tables below include volumes of outstanding commodity derivatives. Amounts disclosed represent the absolute value of notional volumes of commodity contracts excluding NPNS. The Duke Energy Registrants have netted contractual amounts where offsetting purchase and sale contracts exist with identical delivery locations and times of delivery. Where all commodity positions are perfectly offset, no quantities are shown.
March 31, 2025
DukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergy
EnergyCarolinasEnergyProgressOhioIndianaPiedmont
Electricity (GWh)4,679 — — — 518 4,161 — 
Natural gas (millions of dekatherms)780 288 250 250 — 26 216 
December 31, 2024
DukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergy
EnergyCarolinasEnergyProgressOhioIndianaPiedmont
Electricity (GWh)12,229 — — — 1,287 10,942 — 
Natural gas (millions of dekatherms)779 276 246 246 — 32 225 
The following table shows Duke Energy's outstanding derivatives related to foreign currency risk at March 31, 2025.
Fair Value Gain (Loss)(a)
(in millions)
Pay NotionalReceive NotionalReceiveHedgeThree Months Ended March 31,
(in millions)Pay Rate(in millions)RateMaturity Date20252024
Fair value hedges
$645 4.75 %600 euros3.10 %June 2028$28 $2 
537 5.31 %500 euros3.85 %June 203423 2 
815 5.65 %750 
euros
3.75 %April 203135 — 
Total notional amount$1,997 1,850 euros$86 $4 
(a)    Amounts are recorded in Other Income and expenses, net on the Condensed Consolidated Statement of Operations, which offsets an equal translation adjustment of the foreign denominated debt. See the Condensed Consolidated Statements of Comprehensive Income for amounts excluded from the assessment of effectiveness for which the difference between changes in fair value and periodic amortization is recorded
Location and Fair Value of Derivatives Recognized in the Condensed Consolidated Balance Sheets
The following tables show the fair value and balance sheet location of derivative instruments. Although derivatives subject to master netting arrangements are netted on the Condensed Consolidated Balance Sheets, the fair values presented below are shown gross and cash collateral on the derivatives have not been netted against the fair values shown.
Derivative AssetsMarch 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Commodity Contracts
Not Designated as Hedging Instruments
Current$210 $102 $86 $86 $— $1 $21 $— 
Noncurrent84 41 43 43 — — — — 
Total Derivative Assets – Commodity Contracts$294 $143 $129 $129 $— $1 $21 $— 
Interest Rate Contracts
Designated as Hedging Instruments
Current$74 $— $— $— $— $— $— $— 
Noncurrent27 — — — — — — — 
Not Designated as Hedging Instruments
Current36 — 4 — 4 — 32 — 
Noncurrent30 16 14 10 4 — — — 
Total Derivative Assets – Interest Rate Contracts$167 $16 $18 $10 $8 $— $32 $— 
Foreign Currency Contracts
Designated as Hedging Instruments
Noncurrent11 — — — — — — — 
Total Derivative Assets – Foreign Currency Contracts$11 $— $— $— $— $— $— $— 
Total Derivative Assets$472 $159 $147 $139 $8 $1 $53 $— 
Derivative LiabilitiesMarch 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Commodity Contracts
Not Designated as Hedging Instruments
Current$55 $32 $1 $1 $— $— $— $22 
Noncurrent130 25 19 19 — — — 86 
Total Derivative Liabilities – Commodity Contracts$185 $57 $20 $20 $— $— $— $108 
Interest Rate Contracts
Designated as Hedging Instruments
Current$7 $— $— $— $— $— $— $— 
Not Designated as Hedging Instruments
Current9 — 9 — 9 — — — 
Noncurrent18 7 8 5 4 1 3 — 
Total Derivative Liabilities – Interest Rate Contracts$34 $7 $17 $5 $13 $1 $3 $— 
Foreign Currency Contracts
Designated as Hedging Instruments
Current33 — — — — — — — 
Noncurrent20 — — — — — — — 
Total Derivative Liabilities – Foreign Currency Contracts$53 $— $— $— $— $— $— $— 
Total Derivative Liabilities$272 $64 $37 $25 $13 $1 $3 $108 
Derivative AssetsDecember 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Commodity Contracts
Not Designated as Hedging Instruments
Current$49 $20 $17 $17 $— $1 $8 $1 
Noncurrent60 29 32 32 — — — — 
Total Derivative Assets – Commodity Contracts$109 $49 $49 $49 $— $1 $8 $1 
Interest Rate Contracts
Designated as Hedging Instruments
Current108 — — — — — — — 
Noncurrent52 — — — — — — — 
Not Designated as Hedging Instruments
Current110 19 55 44 11 — 36 — 
Noncurrent50 26 23 16 7 — — — 
Total Derivative Assets – Interest Rate Contracts$320 $45 $78 $60 $18 $— $36 $— 
Foreign Currency Contracts
Designated as Hedging Instruments
Noncurrent5 — — — — — — — 
Total Derivative Assets – Foreign Currency Contracts
$5 $— $— $— $— $— $— $— 
Total Derivative Assets$434 $94 $127 $109 $18 $1 $44 $1 
Derivative LiabilitiesDecember 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Commodity Contracts
Not Designated as Hedging Instruments
Current$108 $57 $32 $32 $— $— $3 $16 
Noncurrent134 31 24 24 — — — 78 
Total Derivative Liabilities – Commodity Contracts$242 $88 $56 $56 $— $— $3 $94 
Interest Rate Contracts
Not Designated as Hedging Instruments
Current2 — 2 1 1 — — — 
Noncurrent1 — — — — 1 — — 
Total Derivative Liabilities – Interest Rate Contracts$3 $— $2 $1 $1 $1 $— $— 
Foreign Currency Contracts
Designated as Hedging Instruments
Current35 — — — — — — — 
Noncurrent39 — — — — — — — 
Total Derivative Liabilities – Foreign Currency Contracts
$74 $— $— $— $— $— $— $— 
Total Derivative Liabilities$319 $88 $58 $57 $1 $1 $3 $94 
Offsetting Assets
The following tables present the line items on the Condensed Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. The amounts shown are calculated by counterparty. Accounts receivable or accounts payable may also be available to offset exposures in the event of bankruptcy. These amounts are not included in the tables below.
Derivative AssetsMarch 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Current
Gross amounts recognized$320 $102 $90 $86 $4 $1 $53 $— 
Offset
(1)(1)(1)(1)— — — — 
Cash collateral received
$(3)$(3)$— $— $— $— $— $— 
Net amounts presented in Current Assets: Other$316 $98 $89 $85 $4 $1 $53 $— 
Noncurrent
Gross amounts recognized$152 $57 $57 $53 $4 $— $— $— 
Offset
(36)(18)(18)(18)— — — — 
Cash collateral received
(2)(2)— — — — — — 
Net amounts presented in Other Noncurrent Assets: Other$114 $37 $39 $35 $4 $— $— $— 
Derivative LiabilitiesMarch 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Current
Gross amounts recognized$104 $32 $10 $1 $9 $— $— $22 
Offset
(1)(1)(1)(1)— — — — 
Net amounts presented in Current Liabilities: Other$103 $31 $9 $— $9 $— $— $22 
Noncurrent
Gross amounts recognized$168 $32 $27 $24 $4 $1 $3 $86 
Offset
(36)(18)(18)(18)— — — — 
Net amounts presented in Other Noncurrent Liabilities: Other$132 $14 $9 $6 $4 $1 $3 $86 
Derivative AssetsDecember 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Current
Gross amounts recognized$267 $39 $72 $61 $11 $1 $44 $1 
Offset
(29)(15)(14)(14)— — — — 
Net amounts presented in Current Assets: Other$238 $24 $58 $47 $11 $1 $44 $1 
Noncurrent
Gross amounts recognized$167 $55 $55 $48 $7 $— $— $— 
Offset
(37)(19)(17)(17)— — — — 
Net amounts presented in Other Noncurrent Assets: Other$130 $36 $38 $31 $7 $— $— $— 
Derivative LiabilitiesDecember 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Current
Gross amounts recognized$145 $57 $34 $33 $1 $— $3 $16 
Offset
(29)(15)(14)(14)— — — — 
Cash collateral posted
(3)(2)— — — — (1)— 
Net amounts presented in Current Liabilities: Other$113 $40 $20 $19 $1 $— $2 $16 
Noncurrent
Gross amounts recognized$174 $31 $24 $24 $— $1 $— $78 
Offset
(37)(19)(17)(17)— — — — 
Cash collateral posted
(4)(4)— — — — — — 
Net amounts presented in Other Noncurrent Liabilities: Other$133 $8 $7 $7 $— $1 $— $78 
Offsetting Liabilities
The following tables present the line items on the Condensed Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. The amounts shown are calculated by counterparty. Accounts receivable or accounts payable may also be available to offset exposures in the event of bankruptcy. These amounts are not included in the tables below.
Derivative AssetsMarch 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Current
Gross amounts recognized$320 $102 $90 $86 $4 $1 $53 $— 
Offset
(1)(1)(1)(1)— — — — 
Cash collateral received
$(3)$(3)$— $— $— $— $— $— 
Net amounts presented in Current Assets: Other$316 $98 $89 $85 $4 $1 $53 $— 
Noncurrent
Gross amounts recognized$152 $57 $57 $53 $4 $— $— $— 
Offset
(36)(18)(18)(18)— — — — 
Cash collateral received
(2)(2)— — — — — — 
Net amounts presented in Other Noncurrent Assets: Other$114 $37 $39 $35 $4 $— $— $— 
Derivative LiabilitiesMarch 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Current
Gross amounts recognized$104 $32 $10 $1 $9 $— $— $22 
Offset
(1)(1)(1)(1)— — — — 
Net amounts presented in Current Liabilities: Other$103 $31 $9 $— $9 $— $— $22 
Noncurrent
Gross amounts recognized$168 $32 $27 $24 $4 $1 $3 $86 
Offset
(36)(18)(18)(18)— — — — 
Net amounts presented in Other Noncurrent Liabilities: Other$132 $14 $9 $6 $4 $1 $3 $86 
Derivative AssetsDecember 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Current
Gross amounts recognized$267 $39 $72 $61 $11 $1 $44 $1 
Offset
(29)(15)(14)(14)— — — — 
Net amounts presented in Current Assets: Other$238 $24 $58 $47 $11 $1 $44 $1 
Noncurrent
Gross amounts recognized$167 $55 $55 $48 $7 $— $— $— 
Offset
(37)(19)(17)(17)— — — — 
Net amounts presented in Other Noncurrent Assets: Other$130 $36 $38 $31 $7 $— $— $— 
Derivative LiabilitiesDecember 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Current
Gross amounts recognized$145 $57 $34 $33 $1 $— $3 $16 
Offset
(29)(15)(14)(14)— — — — 
Cash collateral posted
(3)(2)— — — — (1)— 
Net amounts presented in Current Liabilities: Other$113 $40 $20 $19 $1 $— $2 $16 
Noncurrent
Gross amounts recognized$174 $31 $24 $24 $— $1 $— $78 
Offset
(37)(19)(17)(17)— — — — 
Cash collateral posted
(4)(4)— — — — — — 
Net amounts presented in Other Noncurrent Liabilities: Other$133 $8 $7 $7 $— $1 $— $78 
Derivative Contracts with Contingent Credit Features The following tables show information with respect to derivative contracts that are in a net liability position and contain objective credit risk-related payment provisions.
March 31, 2025
DukeDuke
DukeEnergyProgressEnergy
(in millions)EnergyCarolinasEnergyProgress
Aggregate fair value of derivatives in a net liability position$31 $20 $11 $11 
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered$31 $20 $11 $11 
December 31, 2024
DukeDuke
DukeEnergyProgressEnergy
(in millions)EnergyCarolinasEnergyProgress
Aggregate fair value of derivatives in a net liability position$101 $52 $49 $49 
Fair value of collateral already posted6 6 — — 
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered$95 $46 $49 $49 
v3.25.1
Investments in Debt and Equity Securities (Tables)
 3 Months Ended
Mar. 31, 2025
Debt Securities, Available-for-sale [Line Items]  
Debt Securities, Trading, and Equity Securities, FV-NI
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
NDTF
Cash and cash equivalents$— $— $128 $— $— $139 
Equity securities5,430 85 7,828 5,753 61 8,233 
Corporate debt securities8 29 793 6 33 673 
Municipal bonds1 18 341 2 14 342 
U.S. government bonds15 55 1,904 3 84 1,806 
Other debt securities2 7 250 1 8 239 
Total NDTF Investments$5,456 $194 $11,244 $5,765 $200 $11,432 
Other Investments
Cash and cash equivalents$— $— $195 $— $— $47 
Equity securities36 3 113 39 4 160 
Corporate debt securities— 4 77 — 5 79 
Municipal bonds— 1 63 — 1 83 
U.S. government bonds— 4 57 — 5 59 
Other debt securities— 3 43 — 4 45 
Total Other Investments$36 $15 $548 $39 $19 $473 
Total Investments$5,492 $209 $11,792 $5,804 $219 $11,905 
Debt Securities, Available-for-sale
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
NDTF
Cash and cash equivalents$— $— $128 $— $— $139 
Equity securities5,430 85 7,828 5,753 61 8,233 
Corporate debt securities8 29 793 6 33 673 
Municipal bonds1 18 341 2 14 342 
U.S. government bonds15 55 1,904 3 84 1,806 
Other debt securities2 7 250 1 8 239 
Total NDTF Investments$5,456 $194 $11,244 $5,765 $200 $11,432 
Other Investments
Cash and cash equivalents$— $— $195 $— $— $47 
Equity securities36 3 113 39 4 160 
Corporate debt securities— 4 77 — 5 79 
Municipal bonds— 1 63 — 1 83 
U.S. government bonds— 4 57 — 5 59 
Other debt securities— 3 43 — 4 45 
Total Other Investments$36 $15 $548 $39 $19 $473 
Total Investments$5,492 $209 $11,792 $5,804 $219 $11,905 
Schedule of Realized Gain (Loss)
Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2025, and 2024, were as follows.
Three Months Ended
(in millions)March 31, 2025March 31, 2024
FV-NI:
 Realized gains $126 $68 
 Realized losses41 18 
AFS:
 Realized gains10 10 
 Realized losses20 14 
Investments Classified by Contractual Maturity Date
The table below summarizes the maturity date for debt securities.
March 31, 2025
DukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaIndiana
Due in one year or less$83 $5 $75 $19 $56 $1 
Due after one through five years921 441 414 334 80 8 
Due after five through 10 years610 286 273 258 15 7 
Due after 10 years1,914 1,079 739 689 50 10 
Total$3,528 $1,811 $1,501 $1,300 $201 $26 
Duke Energy Carolinas  
Debt Securities, Available-for-sale [Line Items]  
Debt Securities, Trading, and Equity Securities, FV-NI
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
NDTF
Cash and cash equivalents$— $— $53 $— $— $62 
Equity securities3,185 40 4,512 3,386 33 4,751 
Corporate debt securities3 24 494 2 27 401 
Municipal bonds— 6 34 — 4 36 
U.S. government bonds8 32 1,049 — 50 991 
Other debt securities2 7 234 1 8 223 
Total NDTF Investments$3,198 $109 $6,376 $3,389 $122 $6,464 
Debt Securities, Available-for-sale
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
NDTF
Cash and cash equivalents$— $— $53 $— $— $62 
Equity securities3,185 40 4,512 3,386 33 4,751 
Corporate debt securities3 24 494 2 27 401 
Municipal bonds— 6 34 — 4 36 
U.S. government bonds8 32 1,049 — 50 991 
Other debt securities2 7 234 1 8 223 
Total NDTF Investments$3,198 $109 $6,376 $3,389 $122 $6,464 
Schedule of Realized Gain (Loss)
Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2025, and 2024, were as follows.
Three Months Ended
(in millions)March 31, 2025March 31, 2024
FV-NI:
 Realized gains$82 $53 
 Realized losses 22 6 
AFS:
 Realized gains7 4 
 Realized losses14 6 
Progress Energy  
Debt Securities, Available-for-sale [Line Items]  
Debt Securities, Trading, and Equity Securities, FV-NI
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
NDTF
Cash and cash equivalents$— $— $75 $— $— $77 
Equity securities2,245 45 3,316 2,367 28 3,482 
Corporate debt securities5 5 299 4 6 272 
Municipal bonds1 12 307 2 10 306 
U.S. government bonds7 23 855 3 34 815 
Other debt securities— — 16 — — 16 
Total NDTF Investments$2,258 $85 $4,868 $2,376 $78 $4,968 
Other Investments
Cash and cash equivalents$— $— $21 $— $— $23 
Municipal bonds— — 24 — — 24 
Total Other Investments$— $— $45 $— $— $47 
Total Investments$2,258 $85 $4,913 $2,376 $78 $5,015 
Debt Securities, Available-for-sale
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
NDTF
Cash and cash equivalents$— $— $75 $— $— $77 
Equity securities2,245 45 3,316 2,367 28 3,482 
Corporate debt securities5 5 299 4 6 272 
Municipal bonds1 12 307 2 10 306 
U.S. government bonds7 23 855 3 34 815 
Other debt securities— — 16 — — 16 
Total NDTF Investments$2,258 $85 $4,868 $2,376 $78 $4,968 
Other Investments
Cash and cash equivalents$— $— $21 $— $— $23 
Municipal bonds— — 24 — — 24 
Total Other Investments$— $— $45 $— $— $47 
Total Investments$2,258 $85 $4,913 $2,376 $78 $5,015 
Schedule of Realized Gain (Loss)
Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2025, and 2024, were as follows.
Three Months Ended
(in millions)March 31, 2025March 31, 2024
FV-NI:
 Realized gains$44 $15 
 Realized losses19 12 
AFS:
 Realized gains3 6 
 Realized losses6 8 
Duke Energy Progress  
Debt Securities, Available-for-sale [Line Items]  
Debt Securities, Trading, and Equity Securities, FV-NI
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
NDTF
Cash and cash equivalents$— $— $62 $— $— $54 
Equity securities2,139 45 3,201 2,256 28 3,362 
Corporate debt securities5 5 283 4 6 256 
Municipal bonds1 12 307 2 10 306 
U.S. government bonds7 17 696 3 26 645 
Other debt securities— — 14 — — 14 
Total NDTF Investments$2,152 $79 $4,563 $2,265 $70 $4,637 
Other Investments
Cash and cash equivalents$— $— $14 $— $— $16 
Total Other Investments$— $— $14 $— $— $16 
Total Investments$2,152 $79 $4,577 $2,265 $70 $4,653 
Debt Securities, Available-for-sale
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
NDTF
Cash and cash equivalents$— $— $62 $— $— $54 
Equity securities2,139 45 3,201 2,256 28 3,362 
Corporate debt securities5 5 283 4 6 256 
Municipal bonds1 12 307 2 10 306 
U.S. government bonds7 17 696 3 26 645 
Other debt securities— — 14 — — 14 
Total NDTF Investments$2,152 $79 $4,563 $2,265 $70 $4,637 
Other Investments
Cash and cash equivalents$— $— $14 $— $— $16 
Total Other Investments$— $— $14 $— $— $16 
Total Investments$2,152 $79 $4,577 $2,265 $70 $4,653 
Schedule of Realized Gain (Loss)
Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three months ended March 31, 2025, and 2024, were as follows.
Three Months Ended
(in millions)March 31, 2025March 31, 2024
FV-NI:
 Realized gains$44 $15 
 Realized losses19 12 
AFS:
 Realized gains3 6 
 Realized losses6 8 
Duke Energy Florida  
Debt Securities, Available-for-sale [Line Items]  
Debt Securities, Trading, and Equity Securities, FV-NI
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
NDTF
Cash and cash equivalents$— $— $13 $— $— $23 
Equity securities106 — 115 111 — 120 
Corporate debt securities— — 16 — — 16 
U.S. government bonds— 6 159 — 8 170 
Other debt securities— — 2 — — 2 
Total NDTF Investments(a)
$106 $6 $305 $111 $8 $331 
Other Investments
Cash and cash equivalents$— $— $3 $— $— $3 
Municipal bonds— — 24 — — 24 
Total Other Investments$— $— $27 $— $— $27 
Total Investments$106 $6 $332 $111 $8 $358 
(a)During the three months ended March 31, 2025, and the year ended December 31, 2024, Duke Energy Florida received reimbursements from the NDTF for costs related to ongoing decommissioning activity of Crystal River Unit 3.
Debt Securities, Available-for-sale
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
NDTF
Cash and cash equivalents$— $— $13 $— $— $23 
Equity securities106 — 115 111 — 120 
Corporate debt securities— — 16 — — 16 
U.S. government bonds— 6 159 — 8 170 
Other debt securities— — 2 — — 2 
Total NDTF Investments(a)
$106 $6 $305 $111 $8 $331 
Other Investments
Cash and cash equivalents$— $— $3 $— $— $3 
Municipal bonds— — 24 — — 24 
Total Other Investments$— $— $27 $— $— $27 
Total Investments$106 $6 $332 $111 $8 $358 
(a)During the three months ended March 31, 2025, and the year ended December 31, 2024, Duke Energy Florida received reimbursements from the NDTF for costs related to ongoing decommissioning activity of Crystal River Unit 3.
Duke Energy Indiana  
Debt Securities, Available-for-sale [Line Items]  
Debt Securities, Trading, and Equity Securities, FV-NI
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are measured at FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
Investments
Cash and cash equivalents$— $— $2 $— $— $1 
Equity securities— 3 43 — 4 89 
Corporate debt securities— — 1 — — 6 
Municipal bonds— 1 23 — 1 43 
U.S. government bonds— — 2 — — 7 
Total Investments$— $4 $71 $— $5 $146 
Debt Securities, Available-for-sale
The following table presents the estimated fair value of investments in debt and equity securities; equity investments are measured at FV-NI and debt investments are classified as AFS.
March 31, 2025December 31, 2024
GrossGrossGrossGross
UnrealizedUnrealizedEstimatedUnrealizedUnrealizedEstimated
HoldingHoldingFairHoldingHoldingFair
(in millions)GainsLossesValueGainsLossesValue
Investments
Cash and cash equivalents$— $— $2 $— $— $1 
Equity securities— 3 43 — 4 89 
Corporate debt securities— — 1 — — 6 
Municipal bonds— 1 23 — 1 43 
U.S. government bonds— — 2 — — 7 
Total Investments$— $4 $71 $— $5 $146 
v3.25.1
Fair Value Measurements (Tables)
 3 Months Ended
Mar. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair Value Measurement amounts for Assets and Liabilities
The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. Derivative amounts in the tables below for all Duke Energy Registrants exclude cash collateral, which is disclosed in Note 9. See Note 10 for additional information related to investments by major security type for the Duke Energy Registrants.
March 31, 2025
(in millions)Total Fair ValueLevel 1Level 2Level 3Not Categorized
NDTF cash and cash equivalents$128 $128 $— $— $— 
NDTF equity securities7,828 7,800 2 — 26 
NDTF debt securities3,288 1,056 2,232 — — 
Other equity securities113 113 — — — 
Other debt securities240 55 185 — — 
Other cash and cash equivalents195 195 — — — 
Derivative assets472 19 450 3 — 
Total assets12,264 9,366 2,869 3 26 
Derivative liabilities(272)— (272)— — 
Net assets$11,992 $9,366 $2,597 $3 $26 
December 31, 2024
(in millions)Total Fair ValueLevel 1Level 2Level 3Not Categorized
NDTF cash and cash equivalents$139 $139 $— $— $— 
NDTF equity securities8,233 8,203 2 — 28 
NDTF debt securities3,060 1,022 2,038 — — 
Other equity securities160 160 — — — 
Other debt securities266 52 214 — — 
Other cash and cash equivalents47 47 — — — 
Derivative assets434 2 423 9 — 
Total assets12,339 9,625 2,677 9 28 
Derivative liabilities(319)(3)(316)— — 
Net assets$12,020 $9,622 $2,361 $9 $28 
Reconciliation of Assets and Liabilities Measured At Fair Value on a Recurring Basis Using Unobservable Inputs
The following table provides reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.
Derivatives (net)
Three Months Ended March 31,
(in millions) 20252024
Balance at beginning of period$9 $15 
Purchases, sales, issuances and settlements:
Settlements(6)(13)
Total gains included on the Condensed Consolidated Balance Sheet
— 4 
Balance at end of period$3 $6 
Quantitative Information Table - Level 3
The following tables include quantitative information about the Duke Energy Registrants' derivatives classified as Level 3.
March 31, 2025
Weighted
Fair ValueAverage
Investment Type(in millions)Valuation TechniqueUnobservable InputRangeRange
Duke Energy Ohio 
FTRs$1 RTO auction pricingFTR price – per MWh$0.36 -$1.42 $0.70 
Duke Energy Indiana 
FTRs2 RTO auction pricingFTR price – per MWh(0.48)-7.53 0.63 
Duke Energy
Total Level 3 derivatives$3 
December 31, 2024
Weighted
Fair ValueAverage
Investment Type(in millions)Valuation TechniqueUnobservable InputRangeRange
Duke Energy Ohio   
FTRs$1 RTO auction pricingFTR price – per MWh$— –$1.13 $0.48 
Duke Energy Indiana   
FTRs8 RTO auction pricingFTR price – per MWh(0.63)–9.24 0.94 
Duke Energy
Total Level 3 derivatives$9 
Schedule of Long Term Debt Fair Value
The fair value and book value of long-term debt, including current maturities, is summarized in the following table. Estimates determined are not necessarily indicative of amounts that could have been settled in current markets. Fair value of long-term debt uses Level 2 measurements.
March 31, 2025December 31, 2024
(in millions)Book ValueFair ValueBook ValueFair Value
Duke Energy(a)
$83,880 $76,709 $80,689 $73,440 
Duke Energy Carolinas18,234 16,740 17,490 15,975 
Progress Energy26,883 24,925 24,496 22,548 
Duke Energy Progress14,220 12,716 12,504 11,009 
Duke Energy Florida11,018 10,423 10,348 9,752 
Duke Energy Ohio4,166 3,871 4,165 3,871 
Duke Energy Indiana4,798 4,329 4,798 4,329 
Piedmont4,004 3,642 4,003 3,584 
(a)Book value of long-term debt includes $1.0 billion at March 31, 2025, and December 31, 2024, of net unamortized debt discount and premium of purchase accounting adjustments related to the mergers with Progress Energy and Piedmont that are excluded from fair value of long-term debt.
Duke Energy Carolinas  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair Value Measurement amounts for Assets and Liabilities
The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
March 31, 2025
(in millions)Total Fair ValueLevel 1Level 2Not Categorized
NDTF cash and cash equivalents$53 $53 $— $— 
NDTF equity securities4,512 4,484 2 26 
NDTF debt securities1,811 525 1,286 — 
Derivative assets159 — 159 — 
Total assets6,535 5,062 1,447 26 
Derivative liabilities(64)— (64)— 
Net assets$6,471 $5,062 $1,383 $26 
December 31, 2024
(in millions)Total Fair ValueLevel 1Level 2Not Categorized
NDTF cash and cash equivalents$62 $62 $— $— 
NDTF equity securities4,751 4,721 2 28 
NDTF debt securities1,651 520 1,131 — 
Derivative assets94 — 94 — 
Total assets6,558 5,303 1,227 28 
Derivative liabilities(88)— (88)— 
Net assets$6,470 $5,303 $1,139 $28 
Progress Energy  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair Value Measurement amounts for Assets and Liabilities
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
March 31, 2025December 31, 2024
(in millions)Total Fair ValueLevel 1Level 2Total Fair ValueLevel 1Level 2
NDTF cash and cash equivalents$75 $75 $— $77 $77 $— 
NDTF equity securities3,316 3,316 — 3,482 3,482 — 
NDTF debt securities1,477 531 946 1,409 502 907 
Other debt securities24 — 24 24 — 24 
Other cash and cash equivalents21 21 — 23 23 — 
Derivative assets147 — 147 127 — 127 
Total assets5,060 3,943 1,117 5,142 4,084 1,058 
Derivative liabilities(37)— (37)(58)— (58)
Net assets$5,023 $3,943 $1,080 $5,084 $4,084 $1,000 
Duke Energy Progress  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair Value Measurement amounts for Assets and Liabilities
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
March 31, 2025December 31, 2024
(in millions)Total Fair ValueLevel 1Level 2Total Fair ValueLevel 1Level 2
NDTF cash and cash equivalents$62 $62 $— $54 $54 $— 
NDTF equity securities3,201 3,201 — 3,362 3,362 — 
NDTF debt securities1,300 399 901 1,221 365 856 
Other cash and cash equivalents14 14 — 16 16 — 
Derivative assets139 — 139 109 — 109 
Total assets4,716 3,676 1,040 4,762 3,797 965 
Derivative liabilities(25)— (25)(57)— (57)
Net assets$4,691 $3,676 $1,015 $4,705 $3,797 $908 
Duke Energy Florida  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair Value Measurement amounts for Assets and Liabilities
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
March 31, 2025December 31, 2024
(in millions)Total Fair ValueLevel 1Level 2Total Fair ValueLevel 1Level 2
NDTF cash and cash equivalents$13 $13 $— $23 $23 $— 
NDTF equity securities115 115 — 120 120 — 
NDTF debt securities177 132 45 188 137 51 
Other debt securities24 — 24 24 — 24 
Other cash and cash equivalents3 3 — 3 3 — 
Derivative assets8 — 8 18 — 18 
Total assets340 263 77 376 283 93 
Derivative liabilities(13)— (13)(1)— (1)
Net assets$327 $263 $64 $375 $283 $92 
Duke Energy Indiana  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair Value Measurement amounts for Assets and Liabilities
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
March 31, 2025December 31, 2024
(in millions)Total Fair ValueLevel 1Level 2Level 3Total Fair ValueLevel 1Level 2Level 3
Other equity securities$43 $43 $— $— $89 $89 $— $— 
Other debt securities26 — 26 — 56 — 56 — 
Other cash and cash equivalents2 2 — — 1 1 — — 
Derivative assets53 19 32 2 44 — 36 8 
Total assets124 64 58 2 190 90 92 8 
Derivative liabilities(3)— (3)— (3)(3)— — 
Net assets$121 $64 $55 $2 $187 $87 $92 $8 
Reconciliation of Assets and Liabilities Measured At Fair Value on a Recurring Basis Using Unobservable Inputs
The following table provides a reconciliation of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.
Derivatives (net)
Three Months Ended March 31,
(in millions)20252024
Balance at beginning of period$8 $13 
Purchases, sales, issuances and settlements:
Settlements(6)(11)
Total gains included on the Condensed Consolidated Balance Sheet
— 3 
Balance at end of period$2 $5 
Piedmont  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair Value Measurement amounts for Assets and Liabilities
The following table provides recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets.
March 31, 2025December 31, 2024
(in millions)Total Fair ValueLevel 2Total Fair ValueLevel 1Level 2
Derivative assets$— $— $1 $1 $— 
Derivative liabilities(108)(108)(94)— (94)
Net (liabilities) assets$(108)$(108)$(93)$1 $(94)
v3.25.1
Variable Interest Entities (Tables)
 3 Months Ended
Mar. 31, 2025
VIE primary beneficiary  
Variable Interest Entities [Line Items]  
Schedule of Variable Interest Entities
The following table summarizes the amounts and expiration dates of the credit facilities and associated restricted receivables described above.
Duke EnergyDuke Energy
CarolinasProgress
(in millions)DERFDEPR
Expiration date
(a)
(b)
Credit facility amount
(a)
(b)
Amounts borrowed at March 31, 2025— — 
Amounts borrowed at December 31, 2024500 400 
Restricted Receivables at March 31, 2025— — 
Restricted Receivables at December 31, 20241,054 835 
(a)    In January 2025, Duke Energy Carolinas repaid all outstanding DERF borrowings totaling $500 million and terminated the related DERF credit facility.
(b)    In March 2025, Duke Energy Progress repaid all outstanding DEPR borrowings totaling $400 million and terminated the related DEPR credit facility.
DEFPF | VIE primary beneficiary  
Variable Interest Entities [Line Items]  
Schedule of Variable Interest Entities
The following table summarizes the impact of DEFPF on Duke Energy Florida's Condensed Consolidated Balance Sheets.
(in millions)March 31, 2025December 31, 2024
Regulatory Assets: Current61 61 
Current Assets: Other10 35 
Other Noncurrent Assets: Regulatory assets729 741 
Other Noncurrent Assets: Other
7 — 
Current Liabilities: Other2 8 
Current maturities of long-term debt60 59 
Long-Term Debt741 773 
DECNCSF and DEPNCSF | VIE primary beneficiary  
Variable Interest Entities [Line Items]  
Schedule of Variable Interest Entities
The following table summarizes the impact of these VIEs on Duke Energy Carolinas’ and Duke Energy Progress’ Consolidated Balance Sheets.
March 31, 2025December 31, 2024
Duke EnergyDuke EnergyDuke EnergyDuke Energy
CarolinasProgressCarolinasProgress
(in millions)DECNCSFDEPNCSFDEPSCSFDECNCSFDEPNCSFDEPSCSF
Regulatory Assets: Current$12 $39 $8 $12 $39 $8 
Current Assets: Other6 17 6 9 27 13 
Other Noncurrent Assets: Regulatory assets186 608 151 189 620 155 
Other Noncurrent Assets: Other1 4 1 1 4 1 
Current Liabilities: Other1 — — 2 10 7 
Current Maturities of Long-Term Debt
10 35 5 10 34 9 
Long-Term Debt193 629 160 198 646 163 
CRC | VIE not primary beneficiary  
Variable Interest Entities [Line Items]  
Schedule of Variable Interest Entities
The following table shows sales and cash flows related to receivables sold and reflects CRC activity prior to its termination in March 2024.
Duke Energy Ohio
Duke Energy Indiana
Three Months EndedThree Months Ended
March 31,March 31,
(in millions)20242024
Sales
Receivables sold$474 $473 
Loss recognized on sale7 6 
Cash flows
Cash proceeds from receivables sold$478 $523 
Return received on retained interests4 4 
DEF ProCo | VIE primary beneficiary  
Variable Interest Entities [Line Items]  
Schedule of Variable Interest Entities
The following table summarizes the impact of this VIE on Duke Energy Florida's Consolidated Balance Sheets.
(in millions)March 31, 2025
December 31, 2024
Inventory
$509 $494 
Accounts Payable
201 208 
v3.25.1
Revenue (Tables)
 3 Months Ended
Mar. 31, 2025
Revenue from Contract with Customer [Abstract]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction Supplemental requirements contracts that include contracted blocks of energy and capacity at contractually fixed prices have the following estimated remaining performance obligations:
Remaining Performance Obligations
(in millions)20252026202720282029ThereafterTotal
Duke Energy Carolinas$9 $12 $12 $12 $— $— $45 
Progress Energy21 43 13 13 13 42 145 
Duke Energy Progress4 6 6 6 6 20 48 
Duke Energy Florida17 37 7 7 7 22 97 
Duke Energy Indiana13 17 15 5 — — 50 
Estimated remaining performance obligations are as follows:
Remaining Performance Obligations
(in millions)20252026202720282029ThereafterTotal
Piedmont$48 $51 $49 $46 $44 $151 $389 
Disaggregation of Revenue
Disaggregated revenues are presented as follows:
Three Months Ended March 31, 2025
DukeDukeDukeDukeDuke
(in millions)DukeEnergyProgressEnergyEnergyEnergyEnergy
By market or type of customerEnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Electric Utilities and Infrastructure
   Residential$3,403 $1,127 $1,614 $820 $794 $282 $379 $— 
Commercial
1,921 701 845 415 430 142 233 — 
   Industrial823 334 267 193 74 33 187 — 
   Wholesale670 149 443 404 39 22 57 — 
   Other revenues236 180 239 163 76 18 (1)— 
Total Electric Utilities and Infrastructure revenue from contracts with customers$7,053 $2,491 $3,408 $1,995 $1,413 $497 $855 $— 
Gas Utilities and Infrastructure
   Residential$706 $— $— $— $— $186 $— $520 
   Commercial322 — — — — 70 — 252 
   Industrial55 — — — — 16 — 39 
   Power Generation— — — — — — — 24 
   Other revenues74 — — — — 6 — 53 
Total Gas Utilities and Infrastructure revenue from contracts with customers$1,157 $— $— $— $— $278 $— $888 
Other
Revenue from contracts with customers$8 $— $— $— $— $— $— $— 
Total Revenue from contracts with customers$8,218 $2,491 $3,408 $1,995 $1,413 $775 $855 $888 
Other revenue sources(a)
$31 $33 $59 $23 $31 $(9)$3 $(31)
Total operating revenues
$8,249 $2,524 $3,467 $2,018 $1,444 $766 $858 $857 
Three Months Ended March 31, 2024
DukeDukeDukeDukeDuke
(in millions)DukeEnergyProgressEnergyEnergyEnergyEnergy
By market or type of customerEnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Electric Utilities and Infrastructure
   Residential$3,115 $1,058 $1,517 $742 $775 $253 $287 $— 
Commercial
1,934 717 866 422 444 152 201 — 
   Industrial822 340 266 177 89 32 183 — 
   Wholesale554 138 355 326 29 14 48 — 
   Other revenues253 99 149 78 71 22 34 — 
Total Electric Utilities and Infrastructure revenue from contracts with customers$6,678 $2,352 $3,153 $1,745 $1,408 $473 $753 $— 
Gas Utilities and Infrastructure
   Residential$520 $— $— $— $— $147 $— $373 
   Commercial240 — — — — 57 — 183 
   Industrial47 — — — — 11 — 38 
   Power Generation— — — — — — — 8 
   Other revenues40 — — — — 5 — 35 
Total Gas Utilities and Infrastructure revenue from contracts with customers$847 $— $— $— $— $220 $— $637 
Other
Revenue from contracts with customers$7 $— $— $— $— $— $— $— 
Total Revenue from contracts with customers$7,532 $2,352 $3,153 $1,745 $1,408 $693 $753 $637 
Other revenue sources(a)
$139 $55 $75 $43 $28 $(15)$6 $39 
Total operating revenues
$7,671 $2,407 $3,228 $1,788 $1,436 $678 $759 $676 
(a)Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues.
Reserve for Credit Losses for Trade and Other Receivables
The following table presents the reserve for credit losses for trade and other receivables.
Three Months Ended March 31, 2024 and 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Balance at December 31, 2023$205 $56 $74 $44 $31 $9 $5 $11 
Write-Offs(32)(12)(16)(7)(9)— — (1)
Credit Loss Expense10 7 9 4 5 1 2 2 
Other Adjustments21 11 6 6 — 31 9 — 
Balance at March 31, 2024$204 $62 $73 $47 $27 $41 $16 $12 
Balance at December 31, 2024$209 $69 $73 $44 $29 $43 $15 $10 
Write-Offs(29)(14)(15)(8)(7)— — — 
Credit Loss Expense14 5 8 5 3 1 — — 
Other Adjustments10 4 1 1 — 2 2 — 
Balance at March 31, 2025$204 $64 $67 $42 $25 $46 $17 $10 
v3.25.1
Stockholders' Equity (Tables)
 3 Months Ended
Mar. 31, 2025
Equity [Abstract]  
Schedule of Earnings Per Share
The following table presents Duke Energy’s basic and diluted EPS calculations, the weighted average number of common shares outstanding and common and preferred share dividends declared.
Three Months Ended March 31,
(in millions, except per share amounts)20252024
Net Income available to Duke Energy common stockholders
$1,365 $1,099 
Less: Loss from discontinued operations attributable to Duke Energy common stockholders
— (3)
Accumulated preferred stock dividends adjustment— 12 
Less: Impact of participating securities1 2 
Income from continuing operations available to Duke Energy common stockholders$1,364 $1,112 
Loss from discontinued operations, net of tax
$— $(3)
Add: Loss attributable to NCI
— — 
Loss from discontinued operations attributable to Duke Energy common stockholders
$— $(3)
Weighted average common shares outstanding – basic and diluted
777 771 
EPS from continuing operations available to Duke Energy common stockholders
Basic and diluted(a)
$1.76 $1.44 
Potentially dilutive items excluded from the calculation(b)
2 2 
Dividends declared per common share$1.045 $1.025 
Dividends declared on Series A preferred stock per depositary share(c)
$0.359 $0.359 
Dividends declared on Series B preferred stock per share(d)
$— $24.375 
(a)The convertible notes were excluded from the calculations of diluted EPS because the effect was antidilutive.
(b)Performance stock awards were not included in the dilutive securities calculation because the performance measures related to the awards had not been met.
(c)5.75% Series A Cumulative Redeemable Perpetual Preferred Stock dividends are payable quarterly in arrears on the 16th day of March, June, September and December. The preferred stock has a $25 liquidation preference per depositary share.
(d)4.875% Series B Fixed-Rate Reset Cumulative Redeemable Perpetual Preferred Stock dividends were payable semiannually in arrears on the 16th day of March and September. The preferred stock was redeemed on September 16, 2024.
Equity Issuances Pursuant to Forward Contracts
The following table shows ATM equity issuances pursuant to forward contracts executed during the three months ended March 31, 2025.
Tranche
Shares Priced
Initial Forward Price
1
1,710,979$116.02 
2
1,262,618$117.94 
3
1,264,410$117.79 
Total
4,238,007
v3.25.1
Employee Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2025
Qualified Pension Plans  
Defined Benefit Plan Disclosure [Line Items]  
Components of Net Periodic Pension Costs
The following tables include the components of net periodic pension costs for qualified pension plans.
Three Months Ended March 31, 2025
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Service cost$27 $9 $7 $5 $3 $— $1 $1 
Interest cost on projected benefit obligation82 19 26 11 14 4 7 3 
Expected return on plan assets(149)(38)(55)(24)(30)(5)(10)(5)
Amortization of actuarial loss15 4 5 2 2 1 1 1 
Amortization of prior service credit(3)— — — — — — (2)
Amortization of settlement charges6 3 2 1 1 — — 1 
Net periodic pension costs$(22)$(3)$(15)$(5)$(10)$— $(1)$(1)
Three Months Ended March 31, 2024
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Service cost$28 $9 $8 $5 $3 $1 $2 $1 
Interest cost on projected benefit obligation82 20 26 12 14 4 6 2 
Expected return on plan assets(154)(41)(54)(25)(29)(6)(10)(5)
Amortization of actuarial loss8 2 2 1 1 — 1 1 
Amortization of prior service credit(3)— — — — — — (2)
Amortization of settlement charges5 2 1 1 — — — 1 
Net periodic pension costs$(34)$(8)$(17)$(6)$(11)$(1)$(1)$(2)
v3.25.1
Income Taxes (Tables)
 3 Months Ended
Mar. 31, 2025
Income Tax Disclosure [Abstract]  
Summary of Effective Tax Rates
The ETRs from continuing operations for each of the Duke Energy Registrants are included in the following table.
Three Months Ended
March 31,
20252024
Duke Energy12.1 %13.4 %
Duke Energy Carolinas9.0 %11.5 %
Progress Energy16.8 %16.5 %
Duke Energy Progress14.5 %15.0 %
Duke Energy Florida19.9 %19.4 %
Duke Energy Ohio18.0 %16.8 %
Duke Energy Indiana12.5 %17.3 %
Piedmont20.7 %19.6 %
v3.25.1
Organization and Basis of Presentation (Schedule of Cash and Cash Equivalents) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Dec. 31, 2023
Current Assets        
Cash and cash equivalents $ 475 $ 314    
Other Noncurrent Assets        
Total cash, cash equivalents and restricted cash 536 421 $ 518 $ 357
Duke Energy (Parent)        
Current Assets        
Cash and cash equivalents 475 314    
Other 39 84    
Other Noncurrent Assets        
Other 22 20    
Total cash, cash equivalents and restricted cash 536 418    
Duke Energy Carolinas        
Current Assets        
Cash and cash equivalents 46 6    
Other 6 9    
Other Noncurrent Assets        
Other 1 1    
Total cash, cash equivalents and restricted cash 53 16 12 19
Progress Energy        
Current Assets        
Cash and cash equivalents 87 73    
Other 34 76    
Other Noncurrent Assets        
Other 11 11    
Total cash, cash equivalents and restricted cash 132 160 86 135
Duke Energy Progress        
Current Assets        
Cash and cash equivalents 53 24    
Other 23 40    
Other Noncurrent Assets        
Other 5 5    
Total cash, cash equivalents and restricted cash 81 69 49 51
Duke Energy Florida        
Current Assets        
Cash and cash equivalents 16 33    
Other 10 35    
Other Noncurrent Assets        
Other 7 7    
Total cash, cash equivalents and restricted cash $ 33 $ 75 $ 20 $ 67
v3.25.1
Organization and Basis of Presentation (Schedule of Inventory) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Public Utilities, Inventory [Line Items]    
Total inventory $ 4,418 $ 4,509
Duke Energy (Parent)    
Public Utilities, Inventory [Line Items]    
Materials and supplies 3,413 3,387
Coal 700 801
Natural gas, oil and other fuel 305 321
Total inventory 4,418 4,509
Duke Energy Carolinas    
Public Utilities, Inventory [Line Items]    
Materials and supplies 1,133 1,150
Coal 309 341
Natural gas, oil and other fuel 46 45
Total inventory 1,488 1,536
Progress Energy    
Public Utilities, Inventory [Line Items]    
Materials and supplies 1,677 1,649
Coal 233 241
Natural gas, oil and other fuel 197 196
Total inventory 2,107 2,086
Duke Energy Progress    
Public Utilities, Inventory [Line Items]    
Materials and supplies 1,090 1,074
Coal 137 164
Natural gas, oil and other fuel 106 103
Total inventory 1,333 1,341
Duke Energy Florida    
Public Utilities, Inventory [Line Items]    
Materials and supplies 586 576
Coal 96 77
Natural gas, oil and other fuel 91 92
Total inventory 773 745
Duke Energy Ohio    
Public Utilities, Inventory [Line Items]    
Materials and supplies 155 149
Coal 18 23
Natural gas, oil and other fuel 11 11
Total inventory 184 183
Duke Energy Indiana    
Public Utilities, Inventory [Line Items]    
Materials and supplies 399 389
Coal 140 196
Natural gas, oil and other fuel 2 1
Total inventory 541 586
Piedmont    
Public Utilities, Inventory [Line Items]    
Materials and supplies 12 11
Coal 0 0
Natural gas, oil and other fuel 49 67
Total inventory $ 61 $ 78
v3.25.1
Organization and Basis of Presentation (Other Noncurrent Assets) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Regulatory Asset [Line Items]    
Other $ 3,502 $ 3,509
Offshore Wind Arrangement    
Regulatory Asset [Line Items]    
Other $ 150 $ 150
v3.25.1
Organization and Basis of Presentation (Confirmed Obligations) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Duke Energy (Parent)    
Contractual Obligations [Roll Forward]    
Confirmed obligations at beginning of period $ 13 $ 50
Invoices confirmed during the period 18 57
Confirmed invoices paid during the period (13) (31)
Confirmed obligations at end of period 18 76
Progress Energy    
Contractual Obligations [Roll Forward]    
Confirmed obligations at beginning of period 1 3
Invoices confirmed during the period 0 1
Confirmed invoices paid during the period (1) (2)
Confirmed obligations at end of period 0 2
Duke Energy Florida    
Contractual Obligations [Roll Forward]    
Confirmed obligations at beginning of period 1 3
Invoices confirmed during the period 0 1
Confirmed invoices paid during the period (1) (2)
Confirmed obligations at end of period 0 2
Piedmont    
Contractual Obligations [Roll Forward]    
Confirmed obligations at beginning of period 12 47
Invoices confirmed during the period 18 56
Confirmed invoices paid during the period (12) (29)
Confirmed obligations at end of period $ 18 $ 74
v3.25.1
Dispositions (Narrative) (Details) - Commercial Renewables - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Oct. 25, 2023
Discontinued Operations, Disposed of by Sale      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Consideration to be received     $ 1,100
Consideration period     18 months
Discontinued Operations, Disposed of by Sale | Receivables      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Consideration to be received $ 558    
Discontinued Operations, Disposed of by Sale | Noncurrent assets      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Consideration to be received   $ 551  
Discontinued Operations, Held-for-sale      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Noncontrolling interest balance   $ 18  
v3.25.1
Dispositions (Balance Sheet) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Current Assets Held for Sale    
Total current assets held for sale $ 0 $ 4
Noncurrent Assets Held for Sale    
Total other noncurrent assets held for sale 0 89
Current Liabilities Associated with Assets Held for Sale    
Total current liabilities associated with assets held for sale 18 80
Noncurrent Liabilities Associated with Assets Held for Sale    
Total other noncurrent liabilities associated with assets held for sale 0 89
Discontinued Operations, Held-for-sale | Commercial Renewables    
Current Assets Held for Sale    
Other 0 4
Total current assets held for sale 0 4
Noncurrent Assets Held for Sale    
Cost 0 109
Accumulated depreciation and amortization 0 (24)
Net property, plant and equipment 0 85
Operating lease right-of-use assets, net 0 4
Total other noncurrent assets held for sale 0 4
Total Assets Held for Sale 0 93
Current Liabilities Associated with Assets Held for Sale    
Accounts payable 18 19
Taxes accrued 0 1
Current maturities of long-term debt 0 43
Unrealized losses on commodity hedges 0 13
Other 0 4
Total current liabilities associated with assets held for sale 18 80
Noncurrent Liabilities Associated with Assets Held for Sale    
Operating lease liabilities 0 5
Asset retirement obligations 0 5
Unrealized losses on commodity hedges 0 66
Other 0 13
Total other noncurrent liabilities associated with assets held for sale 0 89
Total Liabilities Associated with Assets Held for Sale $ 18 $ 169
v3.25.1
Dispositions (Income Statement) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Net loss from discontinued operations attributable to Duke Energy Corporation   $ (3)
Discontinued Operations, Held-for-sale | Commercial Renewables    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Operating revenues $ 4 (6)
Operation, maintenance and other 1 4
Interest expense 0 2
Loss (Gain) on disposal 4 (10)
Loss before income taxes (1) (2)
Income tax (benefit) expense (1) 1
Net loss from discontinued operations attributable to Duke Energy Corporation $ 0 $ (3)
v3.25.1
Dispositions (Cash Flow Statement) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Commercial Renewables | Discontinued Operations, Held-for-sale    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Operating activities $ (3) $ (3)
v3.25.1
Business Segments (Narrative) (Details)
 3 Months Ended
Mar. 31, 2025
Segment
segment
Segment Reporting Information [Line Items]  
Number of reportable segments | Segment 2
Duke Energy Ohio  
Segment Reporting Information [Line Items]  
Number of reportable segments | segment 2
v3.25.1
Business Segments (Business Segment Data) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues $ 8,249 $ 7,671  
Less:      
Operation, maintenance and other 1,499 1,380  
Depreciation and amortization 1,512 1,387  
Property and other taxes 428 386  
Interest expense 889 817  
Income Tax Expense 193 178  
Noncontrolling interests 25 13  
Preferred dividends 14 39  
Equity in earnings of unconsolidated affiliates 11 17  
Add: Other 138 181  
Segment income (loss) 1,365 1,102  
Loss From Discontinued Operations, net of tax   (3)  
Net Income Available to Duke Energy Corporation Common Stockholders 1,365 1,099  
Income (loss) attributable to noncontrolling interest 25 13  
Net income 1,404 1,151  
Capital expenditures 3,148 3,215  
Total Assets 187,476 178,670 $ 186,343
Fuel used in electric generation and purchased power      
Less:      
Cost of sales 2,099 2,335  
Cost of natural gas      
Less:      
Cost of sales 374 232  
Duke Energy Indiana      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 858 759  
Less:      
Cost of sales 260 271  
Operation, maintenance and other 195 180  
Depreciation and amortization 192 169  
Property and other taxes 18 14  
Interest expense 59 57  
Income Tax Expense 18 14  
Add: Other 10 13  
Segment income (loss) 126 67  
Net income 126 67  
Capital expenditures 234 275  
Total Assets 15,790 14,940 15,727
Duke Energy Indiana | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 260 271  
Duke Energy Ohio      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 766 678  
Less:      
Operation, maintenance and other 124 126  
Depreciation and amortization 112 99  
Property and other taxes 116 102  
Interest expense 47 45  
Income Tax Expense 22 19  
Add: Other 5 6  
Segment income (loss) 100 94  
Net income 100 94  
Capital expenditures 224 217  
Total Assets 12,880 12,305 12,768
Duke Energy Ohio | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 149 138  
Duke Energy Ohio | Cost of natural gas      
Less:      
Cost of sales 101 61  
Duke Energy Carolinas      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 2,524 2,407  
Less:      
Cost of sales 803 860  
Operation, maintenance and other 484 452  
Depreciation and amortization 432 397  
Property and other taxes 102 94  
Interest expense 200 180  
Income Tax Expense 51 56  
Add: Other 61 62  
Segment income (loss) 513 430  
Net income 513 430  
Capital expenditures 1,019 952  
Total Assets 55,412 52,692 55,005
Duke Energy Carolinas | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 803 860  
Progress Energy      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 3,467 3,228  
Less:      
Cost of sales 1,106 1,143  
Operation, maintenance and other 688 628  
Depreciation and amortization 631 587  
Property and other taxes 172 158  
Interest expense 275 260  
Income Tax Expense 110 86  
Add: Other 61 69  
Segment income (loss) 546 435  
Net income 546 435  
Capital expenditures 1,409 1,373  
Total Assets 73,345 67,722 71,636
Progress Energy | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 1,106 1,143  
Duke Energy Progress      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 2,018 1,788  
Less:      
Cost of sales 725 620  
Operation, maintenance and other 398 375  
Depreciation and amortization 357 339  
Property and other taxes 60 51  
Interest expense 128 120  
Income Tax Expense 56 48  
Add: Other 37 37  
Segment income (loss) 331 272  
Net income 331 272  
Capital expenditures 849 704  
Total Assets 40,877 37,494 39,493
Duke Energy Progress | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 725 620  
Duke Energy Florida      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 1,444 1,436  
Less:      
Cost of sales 381 523  
Operation, maintenance and other 286 251  
Depreciation and amortization 274 248  
Property and other taxes 112 106  
Interest expense 118 111  
Income Tax Expense 58 43  
Add: Other 19 25  
Segment income (loss) 234 179  
Net income 234 179  
Capital expenditures 559 669  
Total Assets 28,740 26,498 28,569
Duke Energy Florida | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 381 523  
Piedmont      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 857 676  
Less:      
Cost of sales 272 170  
Operation, maintenance and other 96 95  
Depreciation and amortization 70 62  
Property and other taxes 18 15  
Interest expense 47 45  
Income Tax Expense 76 60  
Equity in earnings of unconsolidated affiliates 2 2  
Add: Other 11 15  
Segment income (loss) 291 246  
Net income 291 246  
Capital expenditures 182 294  
Total Assets 11,909 11,192 $ 11,799
Piedmont | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 272 170  
Other      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 8 7  
Eliminations      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues (73) (72)  
Less:      
Operation, maintenance and other (52) (48)  
Depreciation and amortization (6) (7)  
Property and other taxes 0 0  
Interest expense (24) (37)  
Income Tax Expense 0 0  
Noncontrolling interests 0 0  
Equity in earnings of unconsolidated affiliates   (1)  
Add: Other (29) (39)  
Eliminations | Fuel used in electric generation and purchased power      
Less:      
Cost of sales (20) (20)  
Eliminations | Duke Energy Indiana      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 0 0  
Less:      
Operation, maintenance and other 2 2  
Depreciation and amortization 0 0  
Property and other taxes 0 0  
Interest expense (1) 0  
Income Tax Expense 0 0  
Add: Other 0 0  
Segment income (loss) (1) (2)  
Capital expenditures 0 0  
Total Assets 8 19  
Eliminations | Duke Energy Indiana | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 0 0  
Eliminations | Duke Energy Ohio      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 0 0  
Less:      
Operation, maintenance and other 3 1  
Depreciation and amortization 0 0  
Property and other taxes 0 0  
Interest expense 0 1  
Income Tax Expense (1) 0  
Add: Other (1) 0  
Segment income (loss) (3) (2)  
Capital expenditures 0 0  
Total Assets 53 20  
Eliminations | Duke Energy Ohio | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 0 0  
Eliminations | Duke Energy Ohio | Cost of natural gas      
Less:      
Cost of sales 0 0  
Eliminations | Duke Energy Carolinas      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 0 0  
Less:      
Operation, maintenance and other 10 11  
Depreciation and amortization 0 0  
Property and other taxes 0 0  
Interest expense 0 0  
Income Tax Expense (2) (2)  
Add: Other 0 0  
Segment income (loss) (8) (9)  
Capital expenditures 0 0  
Total Assets 377 205  
Eliminations | Duke Energy Carolinas | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 0 0  
Eliminations | Progress Energy      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 5 4  
Less:      
Operation, maintenance and other 15 12  
Depreciation and amortization 0 0  
Property and other taxes 0 1  
Interest expense 29 29  
Income Tax Expense (8) (9)  
Add: Other 0 8  
Segment income (loss) (31) (21)  
Capital expenditures 0 0  
Total Assets 5,004 3,861  
Eliminations | Progress Energy | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 0 0  
Eliminations | Duke Energy Progress      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 0 0  
Less:      
Operation, maintenance and other 7 6  
Depreciation and amortization 0 0  
Property and other taxes 0 0  
Interest expense 0 0  
Income Tax Expense (2) (2)  
Add: Other (2) 1  
Segment income (loss) (7) (3)  
Capital expenditures 0 0  
Total Assets 1,089 104  
Eliminations | Duke Energy Progress | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 0 0  
Eliminations | Duke Energy Florida      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 0 0  
Less:      
Operation, maintenance and other 4 4  
Depreciation and amortization 0 0  
Property and other taxes 0 0  
Interest expense 0 0  
Income Tax Expense (2) (2)  
Add: Other (3) 0  
Segment income (loss) (5) (2)  
Capital expenditures 0 0  
Total Assets 187 27  
Eliminations | Duke Energy Florida | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 0 0  
Eliminations | Piedmont      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 0 0  
Less:      
Operation, maintenance and other 2 0  
Depreciation and amortization 0 0  
Property and other taxes 0 0  
Interest expense 0 0  
Income Tax Expense 0 1  
Equity in earnings of unconsolidated affiliates 2 2  
Add: Other 0 0  
Segment income (loss) 0 1  
Capital expenditures 0 0  
Total Assets 91 93  
Eliminations | Piedmont | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 0 0  
Total Reportable Segments      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 8,241 7,664  
Total Reportable Segments | Operating Segments      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 8,280 7,705  
Less:      
Operation, maintenance and other 1,549 1,446  
Depreciation and amortization 1,441 1,323  
Property and other taxes 425 383  
Interest expense 595 560  
Income Tax Expense 280 242  
Noncontrolling interests 25 13  
Preferred dividends 0 0  
Equity in earnings of unconsolidated affiliates 5 1  
Add: Other 148 153  
Segment income (loss) 1,625 1,305  
Capital expenditures 3,063 3,128  
Total Assets 183,027 174,070  
Total Reportable Segments | Operating Segments | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 2,119 2,355  
Total Reportable Segments | Operating Segments | Cost of natural gas      
Less:      
Cost of sales 374 232  
Total Reportable Segments | Operating Segments | Duke Energy Ohio      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 766 678  
Less:      
Operation, maintenance and other 121 125  
Depreciation and amortization 112 99  
Property and other taxes 116 102  
Interest expense 47 44  
Income Tax Expense 23 19  
Add: Other 6 6  
Segment income (loss) 103 96  
Capital expenditures 224 217  
Total Assets 12,827 12,285  
Total Reportable Segments | Operating Segments | Duke Energy Ohio | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 149 138  
Total Reportable Segments | Operating Segments | Duke Energy Ohio | Cost of natural gas      
Less:      
Cost of sales 101 61  
Total Reportable Segments | Eliminations      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 39 41  
Electric Utilities and Infrastructure      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 7,125 6,785  
Electric Utilities and Infrastructure | Operating Segments      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 7,140 6,803  
Less:      
Operation, maintenance and other 1,424 1,317  
Depreciation and amortization 1,334 1,225  
Property and other taxes 378 337  
Interest expense 530 499  
Income Tax Expense 189 173  
Noncontrolling interests 25 13  
Equity in earnings of unconsolidated affiliates   1  
Add: Other 135 136  
Segment income (loss) 1,276 1,021  
Capital expenditures 2,814 2,746  
Total Assets 164,794 156,606  
Electric Utilities and Infrastructure | Operating Segments | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 2,119 2,355  
Electric Utilities and Infrastructure | Operating Segments | Cost of natural gas      
Less:      
Cost of sales 0 0  
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Indiana      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 858 759  
Less:      
Operation, maintenance and other 193 178  
Depreciation and amortization 192 169  
Property and other taxes 18 14  
Interest expense 60 57  
Income Tax Expense 18 14  
Add: Other 10 13  
Segment income (loss) 127 69  
Capital expenditures 234 275  
Total Assets 15,782 14,921  
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Indiana | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 260 271  
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Ohio      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 487 458  
Less:      
Operation, maintenance and other 92 93  
Depreciation and amortization 76 66  
Property and other taxes 86 71  
Interest expense 31 29  
Income Tax Expense 9 10  
Add: Other 4 4  
Segment income (loss) 48 55  
Capital expenditures 157 137  
Total Assets 8,303 7,935  
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Ohio | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 149 138  
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Ohio | Cost of natural gas      
Less:      
Cost of sales 0 0  
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Carolinas      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 2,524 2,407  
Less:      
Operation, maintenance and other 474 441  
Depreciation and amortization 432 397  
Property and other taxes 102 94  
Interest expense 200 180  
Income Tax Expense 53 58  
Add: Other 61 62  
Segment income (loss) 521 439  
Capital expenditures 1,019 952  
Total Assets 55,035 52,487  
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Carolinas | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 803 860  
Electric Utilities and Infrastructure | Operating Segments | Progress Energy      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 3,462 3,224  
Less:      
Operation, maintenance and other 673 616  
Depreciation and amortization 631 587  
Property and other taxes 172 157  
Interest expense 246 231  
Income Tax Expense 118 95  
Add: Other 61 61  
Segment income (loss) 577 456  
Capital expenditures 1,409 1,373  
Total Assets 68,341 63,861  
Electric Utilities and Infrastructure | Operating Segments | Progress Energy | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 1,106 1,143  
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Progress      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 2,018 1,788  
Less:      
Operation, maintenance and other 391 369  
Depreciation and amortization 357 339  
Property and other taxes 60 51  
Interest expense 128 120  
Income Tax Expense 58 50  
Add: Other 39 36  
Segment income (loss) 338 275  
Capital expenditures 849 704  
Total Assets 39,788 37,390  
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Progress | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 725 620  
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Florida      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 1,444 1,436  
Less:      
Operation, maintenance and other 282 247  
Depreciation and amortization 274 248  
Property and other taxes 112 106  
Interest expense 118 111  
Income Tax Expense 60 45  
Add: Other 22 25  
Segment income (loss) 239 181  
Capital expenditures 559 669  
Total Assets 28,553 26,471  
Electric Utilities and Infrastructure | Operating Segments | Duke Energy Florida | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 381 523  
Electric Utilities and Infrastructure | Eliminations      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 15 18  
Gas Utilities and Infrastructure      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 1,116 879  
Gas Utilities and Infrastructure | Operating Segments      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 1,140 902  
Less:      
Operation, maintenance and other 125 129  
Depreciation and amortization 107 98  
Property and other taxes 47 46  
Interest expense 65 61  
Income Tax Expense 91 69  
Noncontrolling interests 0 0  
Equity in earnings of unconsolidated affiliates 5    
Add: Other 13 17  
Segment income (loss) 349 284  
Capital expenditures 249 382  
Total Assets 18,233 17,464  
Gas Utilities and Infrastructure | Operating Segments | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 0 0  
Gas Utilities and Infrastructure | Operating Segments | Cost of natural gas      
Less:      
Cost of sales 374 232  
Gas Utilities and Infrastructure | Operating Segments | Duke Energy Ohio      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 279 220  
Less:      
Operation, maintenance and other 29 32  
Depreciation and amortization 36 33  
Property and other taxes 30 31  
Interest expense 16 15  
Income Tax Expense 14 9  
Add: Other 2 2  
Segment income (loss) 55 41  
Capital expenditures 67 80  
Total Assets 4,524 4,350  
Gas Utilities and Infrastructure | Operating Segments | Duke Energy Ohio | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 0 0  
Gas Utilities and Infrastructure | Operating Segments | Duke Energy Ohio | Cost of natural gas      
Less:      
Cost of sales 101 61  
Gas Utilities and Infrastructure | Operating Segments | Piedmont      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 857 676  
Less:      
Operation, maintenance and other 94 95  
Depreciation and amortization 70 62  
Property and other taxes 18 15  
Interest expense 47 45  
Income Tax Expense 76 59  
Equity in earnings of unconsolidated affiliates 0 0  
Add: Other 11 15  
Segment income (loss) 291 245  
Capital expenditures 182 294  
Total Assets 11,818 11,099  
Gas Utilities and Infrastructure | Operating Segments | Piedmont | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 272 170  
Gas Utilities and Infrastructure | Eliminations      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 24 23  
Other | Other      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues 42 38  
Other | Corporate And Eliminations      
Less:      
Operation, maintenance and other 2 (18)  
Depreciation and amortization 77 71  
Property and other taxes 3 3  
Interest expense 318 294  
Income Tax Expense (87) (64)  
Noncontrolling interests 0 0  
Preferred dividends 14 39  
Equity in earnings of unconsolidated affiliates 6 17  
Add: Other 19 67  
Segment income (loss) (260) (203)  
Capital expenditures 85 87  
Total Assets 4,449 4,600  
Other | Corporate And Eliminations | Fuel used in electric generation and purchased power      
Less:      
Cost of sales 0 0  
Other | Corporate And Eliminations | Cost of natural gas      
Less:      
Cost of sales 0 0  
Other | Eliminations      
Segment Reporting Information, Profit (Loss) [Abstract]      
Operating Revenues $ 34 $ 31  
v3.25.1
Regulatory Matters (Regulatory Matters Narrative - Duke Energy Carolinas and Duke Energy Progress) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 21, 2025
Jun. 07, 2021
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Apr. 16, 2025
Public Utilities, General Disclosures [Line Items]            
Capital expenditures     $ 3,148 $ 3,215    
Regulatory assets     14,200   $ 14,254  
Duke Energy Carolinas            
Public Utilities, General Disclosures [Line Items]            
Capital expenditures     1,019 952    
Regulatory assets     4,149   4,199  
Duke Energy Carolinas | Hurricanes Debby and Helene            
Public Utilities, General Disclosures [Line Items]            
Reduction in regulatory liabilities     58      
Duke Energy Carolinas | Hurricanes Debby and Helene | Minimum            
Public Utilities, General Disclosures [Line Items]            
Storm restoration costs incurred     554      
Capital expenditures     404      
Duke Energy Progress            
Public Utilities, General Disclosures [Line Items]            
Capital expenditures     849 704    
Regulatory assets     4,573   4,555  
Duke Energy Progress | Hurricanes Debby and Helene            
Public Utilities, General Disclosures [Line Items]            
Reduction in regulatory liabilities     38      
Duke Energy Progress | Hurricanes Debby and Helene | Minimum            
Public Utilities, General Disclosures [Line Items]            
Storm restoration costs incurred     210      
Capital expenditures     152      
Duke Energy Florida            
Public Utilities, General Disclosures [Line Items]            
Capital expenditures     559 $ 669    
Regulatory assets     2,068   2,064  
Duke Energy Florida | Hurricane Ian            
Public Utilities, General Disclosures [Line Items]            
Capital expenditures         74  
Regulatory assets     813   936  
Duke Energy Carolinas and Duke Energy Progress | Hurricanes Debby and Helene            
Public Utilities, General Disclosures [Line Items]            
Total expense incurred     100      
Duke Energy Carolinas and Duke Energy Progress | Hurricanes Debby and Helene | Minimum            
Public Utilities, General Disclosures [Line Items]            
Storm restoration costs incurred     764      
Capital expenditures     $ 556      
Nuclear Regulatory Commission            
Public Utilities, General Disclosures [Line Items]            
Operating license extension (in years)     20 years      
PSCSC | Duke Energy Carolinas | Hurricane Helene            
Public Utilities, General Disclosures [Line Items]            
Total storm restoration costs $ 604          
Storm reserves $ 25          
Oconee Nuclear Station Subsequent License Renewal | Oconee Nuclear Station | Nuclear Regulatory Commission | Duke Energy Carolinas            
Public Utilities, General Disclosures [Line Items]            
Operating license extension (in years)   20 years        
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Carolinas | Hurricane Ian            
Public Utilities, General Disclosures [Line Items]            
Storm reserves         200  
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Carolinas | Hurricane Ian | Subsequent event            
Public Utilities, General Disclosures [Line Items]            
Storm reserves           $ 584
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Progress | Hurricane Ian            
Public Utilities, General Disclosures [Line Items]            
Storm reserves         $ 100  
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Progress | Hurricane Ian | Subsequent event            
Public Utilities, General Disclosures [Line Items]            
Storm reserves           $ 461
v3.25.1
Regulatory Matters (Regulatory Matters Narrative - Duke Energy Carolinas) (Details) - USD ($)
$ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 15, 2023
Jan. 19, 2023
Jun. 07, 2021
Aug. 31, 2023
Mar. 31, 2025
Mar. 31, 2024
Dec. 14, 2027
Dec. 14, 2026
Dec. 14, 2025
Dec. 14, 2024
Public Utilities, General Disclosures [Line Items]                    
Operation, maintenance and other         $ 1,499 $ 1,380        
Interest Expense         (889) (817)        
Duke Energy Carolinas                    
Public Utilities, General Disclosures [Line Items]                    
Operation, maintenance and other         484 452        
Interest Expense         $ (200) $ (180)        
Nuclear Regulatory Commission                    
Public Utilities, General Disclosures [Line Items]                    
Operating license extension (in years)         20 years          
2023 North Carolina Rate Case | NCUC | Duke Energy Carolinas                    
Public Utilities, General Disclosures [Line Items]                    
Proposed rate period (in years)   3 years                
Settlement rate, amount       $ 19,500            
Settlement rate, period (in years)       3 years            
Approved rate increase (decrease), amount                   $ 436
Approved return on equity percentage (as a percent) 10.10%                  
Public utilities, approved equity capital structure, percentage (as a percent) 53.00%                  
2023 North Carolina Rate Case | NCUC | Duke Energy Carolinas | Forecast                    
Public Utilities, General Disclosures [Line Items]                    
Approved rate increase (decrease), amount             $ 768 $ 158 $ 174  
2023 North Carolina Rate Case, Retail Allocated | NCUC | Duke Energy Carolinas                    
Public Utilities, General Disclosures [Line Items]                    
Settlement rate, amount       $ 4,600            
Oconee Nuclear Station Subsequent License Renewal | Nuclear Regulatory Commission | Duke Energy Carolinas | Oconee Nuclear Station                    
Public Utilities, General Disclosures [Line Items]                    
Operating license extension (in years)     20 years              
v3.25.1
Regulatory Matters (Regulatory Matters Narrative - Duke Energy Progress) (Details)
 1 Months Ended 3 Months Ended 12 Months Ended
Apr. 08, 2025
Apr. 07, 2025
Feb. 07, 2025
USD ($)
MW
Aug. 18, 2023
USD ($)
Apr. 30, 2023
Oct. 31, 2022
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Aug. 17, 2027
USD ($)
Aug. 17, 2026
USD ($)
Aug. 17, 2025
USD ($)
Aug. 17, 2024
USD ($)
Public Utilities, General Disclosures [Line Items]                        
Operation, maintenance and other             $ 1,499,000,000 $ 1,380,000,000        
Debt issuances             3,200,000,000          
Duke Energy Progress                        
Public Utilities, General Disclosures [Line Items]                        
Operation, maintenance and other             398,000,000 $ 375,000,000        
Debt issuances             $ 2,100,000,000          
Nuclear Regulatory Commission                        
Public Utilities, General Disclosures [Line Items]                        
Operating license extension (in years)             20 years          
2022 North Carolina Rate Case | NCUC | Duke Energy Progress                        
Public Utilities, General Disclosures [Line Items]                        
Proposed rate period (in years)         3 years              
Settlement rate, amount       $ 12,200,000,000                
Settlement rate, period (in years)       3 years   3 years            
Approved return on equity percentage (as a percent)       9.80%                
Public utilities, approved equity capital structure, percentage (as a percent)       53.00%                
Approved rate increase (decrease), amount                       $ 233,000,000
2022 North Carolina Rate Case | NCUC | Duke Energy Progress | Forecast                        
Public Utilities, General Disclosures [Line Items]                        
Approved rate increase (decrease), amount                 $ 494,000,000 $ 135,000,000 $ 126,000,000  
2022 North Carolina Rate Case, Retail Allocated | NCUC | Duke Energy Progress                        
Public Utilities, General Disclosures [Line Items]                        
Settlement rate, amount       $ 3,500,000,000                
Person County Cycle CPCN Proceeding | NCUC | Duke Energy Progress                        
Public Utilities, General Disclosures [Line Items]                        
Requested rate increase (decrease), amount     $ 113,000,000                  
Generation capacity (MW) | MW     1,360                  
Generation capacity, co-owned (MW) | MW     225                  
Requested rate increase (decrease) (as a percent)     2.60%                  
Robinson Subsequent License Renewal | Nuclear Regulatory Commission | Duke Energy Progress | Subsequent event                        
Public Utilities, General Disclosures [Line Items]                        
Operating license extension (in years) 20 years                      
Operating license (in years) 80 years 60 years                    
v3.25.1
Regulatory Matters (Regulatory Matters Narrative - Duke Energy Florida) (Details)
$ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Oct. 31, 2022
USD ($)
Jul. 31, 2020
USD ($)
plant
MW
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2024
USD ($)
Jan. 31, 2025
USD ($)
Aug. 01, 2024
USD ($)
Jul. 31, 2024
USD ($)
Apr. 30, 2022
USD ($)
Public Utilities, General Disclosures [Line Items]                  
Capital expenditures     $ 3,148 $ 3,215          
Regulatory assets     14,200   $ 14,254        
Duke Energy Florida                  
Public Utilities, General Disclosures [Line Items]                  
Capital expenditures     559 $ 669          
Regulatory assets     2,068   2,064        
Duke Energy Florida | Hurricane Ian                  
Public Utilities, General Disclosures [Line Items]                  
Capital expenditures         74        
Regulatory assets     $ 813   936        
Duke Energy Florida | Solar Project                  
Public Utilities, General Disclosures [Line Items]                  
Estimated cost of facilities   $ 1,100              
FPSC | Duke Energy Florida                  
Public Utilities, General Disclosures [Line Items]                  
Number of solar plants | plant   10              
Generation capacity (MW) | MW   749              
Storm Protection Plan | FPSC | Duke Energy Florida                  
Public Utilities, General Disclosures [Line Items]                  
Investment in transmission and distribution           $ 7,000     $ 7,000
Cost reduction to transmission loop $ 80                
Cost reduction period (in years) 10 years                
Hurricane Ian | FPSC | Duke Energy Florida | Hurricane Ian                  
Public Utilities, General Disclosures [Line Items]                  
Storm reserves         $ 1,100   $ 132 $ 63  
v3.25.1
Regulatory Matters (Regulatory Matters Narrative - Duke Energy Ohio) (Details) - USD ($)
$ in Millions
 1 Months Ended
Apr. 30, 2025
Oct. 12, 2023
Dec. 31, 2024
Apr. 30, 2024
Apr. 30, 2023
Mar. 31, 2025
Duke Energy Ohio Gas Base Rate Case | PUCO | Duke Energy Ohio            
Public Utilities, General Disclosures [Line Items]            
Requested rate increase (decrease), amount         $ 32  
Requested return on equity (as a percent)         9.60%  
Duke Energy Ohio Gas Base Rate Case | PUCO | Duke Energy Ohio | Maximum            
Public Utilities, General Disclosures [Line Items]            
Equity ratio (as a percent)         52.32%  
Duke Energy Kentucky Electric Base Rate Case | KPSC | Duke Energy Ohio            
Public Utilities, General Disclosures [Line Items]            
Approved rate increase (decrease), amount   $ 48        
Duke Energy Kentucky Electric Base Rate Case | KPSC | Duke Energy Ohio | Maximum            
Public Utilities, General Disclosures [Line Items]            
Equity ratio (as a percent)   52.145%        
Duke Energy Kentucky Electric Base Rate Case, Electric Riders | KPSC | Duke Energy Ohio            
Public Utilities, General Disclosures [Line Items]            
Approved return on equity percentage (as a percent)   9.65%        
Duke Energy Kentucky Electric Base Rate Case, Electric Base Rates | KPSC | Duke Energy Ohio            
Public Utilities, General Disclosures [Line Items]            
Approved return on equity percentage (as a percent)   9.75%        
Duke Energy Ohio Energy Security Plan | PUCO | Duke Energy Ohio            
Public Utilities, General Disclosures [Line Items]            
Settlement rate, period (in years)       3 years    
Regulatory assets     $ 30     $ 24
Duke Energy Ohio Energy Security Plan | PUCO | Duke Energy Ohio | Subsequent event            
Public Utilities, General Disclosures [Line Items]            
Settlement rate, period (in years) 3 years          
Review period 10 days          
Approval period 90 days          
Duke Energy Kentucky 2024 Electric Base Rate Case | KPSC | Duke Energy Kentucky            
Public Utilities, General Disclosures [Line Items]            
Requested rate increase (decrease), amount     $ 70      
Requested return on equity (as a percent)     10.85%      
Equity ratio (as a percent)     52.728%      
Requested rate increase, percentage, net of tax     14.70%      
v3.25.1
Regulatory Matters (Regulatory Matters Narrative - Duke Energy Indiana) (Details)
$ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Feb. 13, 2025
USD ($)
MW
Feb. 07, 2025
USD ($)
Jan. 29, 2025
USD ($)
Apr. 30, 2024
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2026
Dec. 31, 2025
Sep. 20, 2023
Jun. 15, 2022
USD ($)
Public Utilities, General Disclosures [Line Items]                    
Operating Revenues         $ 8,249 $ 7,671        
Duke Energy Indiana                    
Public Utilities, General Disclosures [Line Items]                    
Operating Revenues         $ 858 $ 759        
Indiana Coal Ash Recovery | IURC | Duke Energy Indiana                    
Public Utilities, General Disclosures [Line Items]                    
Interest rate on refunds (as a percent)                 4.71%  
TDSIG 2.0 | IURC | Duke Energy Indiana                    
Public Utilities, General Disclosures [Line Items]                    
Future investment in infrastructure                   $ 2,000
2024 Indiana Rate Case | IURC | Duke Energy Indiana                    
Public Utilities, General Disclosures [Line Items]                    
Future investment in infrastructure       $ 1,600            
Requested rate increase (decrease), amount   $ 385 $ 296 $ 492            
Requested rate increase, percentage, net of tax       16.20%            
Requested return on equity (as a percent)     9.75% 10.50%            
Equity ratio (as a percent)     53.00% 53.00%            
2024 Indiana Rate Case | IURC | Duke Energy Indiana | Forecast                    
Public Utilities, General Disclosures [Line Items]                    
Requested rate increase, percentage, net of tax             4.50% 11.70%    
Cayuga Combined Cycle CPCN, Gas-Fired | IURC | Duke Energy Indiana                    
Public Utilities, General Disclosures [Line Items]                    
New combustion turbines (in megawatts) | MW 1,476                  
Cayuga Combined Cycle CPCN, Coal-Fired | IURC | Duke Energy Indiana                    
Public Utilities, General Disclosures [Line Items]                    
New combustion turbines (in megawatts) | MW 1,005                  
Cayuga Combined Cycle CPCN | IURC | Duke Energy Indiana                    
Public Utilities, General Disclosures [Line Items]                    
Requested rate increase, percentage, net of tax 5.40%                  
New combustion turbines (in megawatts) | MW 471                  
Estimated cost of facilities $ 3,000                  
v3.25.1
Commitments and Contingencies (Schedule of Environmental Loss Contingencies) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation $ 68 $ 73
Duke Energy Carolinas    
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation 24 24
Progress Energy    
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation 19 19
Duke Energy Progress    
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation 9 9
Duke Energy Florida    
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation 10 10
Duke Energy Ohio    
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation 16 21
Duke Energy Indiana    
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation 2 2
Piedmont    
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation $ 6 $ 7
v3.25.1
Commitments and Contingencies (Narrative) (Details)
$ in Millions
Dec. 20, 2024
Plaintiff
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
Mooresville Coal Ash Class Action Litigation        
Loss Contingencies [Line Items]        
Number of plaintiffs | Plaintiff 15      
Duke Energy Carolinas | Asbestos-related Injuries and Damages Claims        
Loss Contingencies [Line Items]        
Asbestos-related injuries and damages reserves   $ 387 $ 396  
Probable insurance recoveries   539 539  
Duke Energy and Duke Energy Carolinas | ASU 2016-13        
Loss Contingencies [Line Items]        
Reserve for credit losses for insurance receivables   $ 9 $ 9  
Duke Energy Indiana        
Loss Contingencies [Line Items]        
Settlement disbursement period       2 years
v3.25.1
Debt and Credit Facilities (Summary of Debt Issuances) (Details) - USD ($)
 1 Months Ended
Mar. 31, 2025
Jan. 31, 2025
Apr. 30, 2024
Debt Instrument [Line Items]      
Debt issuances $ 3,200,000,000    
4.85% January 2025 Notes Due March 2030 | First Mortgage Bonds      
Debt Instrument [Line Items]      
Interest rate (as a percent) 4.85%    
Debt issuances $ 400,000,000    
5.25% January 2025 Notes Due March 2035 | First Mortgage Bonds      
Debt Instrument [Line Items]      
Interest rate (as a percent) 5.25%    
Debt issuances $ 700,000,000    
4.35% March 2025 Notes Due March 2027 | First Mortgage Bonds      
Debt Instrument [Line Items]      
Interest rate (as a percent) 4.35%    
Debt issuances $ 500,000,000    
5.05% March 2025 Notes Due March 2035 | First Mortgage Bonds      
Debt Instrument [Line Items]      
Interest rate (as a percent) 5.05%    
Debt issuances $ 850,000,000    
5.55% March 2025 Notes Due March 2055 | First Mortgage Bonds      
Debt Instrument [Line Items]      
Interest rate (as a percent) 5.55%    
Debt issuances $ 750,000,000    
Duke Energy Carolinas      
Debt Instrument [Line Items]      
Debt issuances 1,100,000,000    
Duke Energy Carolinas | 4.85% January 2025 Notes Due March 2030 | First Mortgage Bonds      
Debt Instrument [Line Items]      
Debt issuances 400,000,000    
Duke Energy Carolinas | 5.25% January 2025 Notes Due March 2035 | First Mortgage Bonds      
Debt Instrument [Line Items]      
Debt issuances 700,000,000    
Duke Energy Carolinas | 4.35% March 2025 Notes Due March 2027 | First Mortgage Bonds      
Debt Instrument [Line Items]      
Debt issuances 0    
Duke Energy Carolinas | 5.05% March 2025 Notes Due March 2035 | First Mortgage Bonds      
Debt Instrument [Line Items]      
Debt issuances 0    
Duke Energy Carolinas | 5.55% March 2025 Notes Due March 2055 | First Mortgage Bonds      
Debt Instrument [Line Items]      
Debt issuances 0    
Duke Energy Carolinas | DEFR Accounts Receivable Securitization Facility Maturing April 2024 | Secured Debt | VIE primary beneficiary      
Debt Instrument [Line Items]      
Repayments of debt   $ 500,000,000  
Duke Energy Carolinas | DERF | Secured Debt | VIE primary beneficiary      
Debt Instrument [Line Items]      
Repayments of debt   $ 500,000,000  
Duke Energy Progress      
Debt Instrument [Line Items]      
Debt issuances 2,100,000,000    
Duke Energy Progress | 4.85% January 2025 Notes Due March 2030 | First Mortgage Bonds      
Debt Instrument [Line Items]      
Debt issuances 0    
Duke Energy Progress | 5.25% January 2025 Notes Due March 2035 | First Mortgage Bonds      
Debt Instrument [Line Items]      
Debt issuances 0    
Duke Energy Progress | 4.35% March 2025 Notes Due March 2027 | First Mortgage Bonds      
Debt Instrument [Line Items]      
Debt issuances 500,000,000    
Duke Energy Progress | 5.05% March 2025 Notes Due March 2035 | First Mortgage Bonds      
Debt Instrument [Line Items]      
Debt issuances 850,000,000    
Duke Energy Progress | 5.55% March 2025 Notes Due March 2055 | First Mortgage Bonds      
Debt Instrument [Line Items]      
Debt issuances 750,000,000    
Duke Energy Progress | DEFR Accounts Receivable Securitization Facility Maturing April 2024 | Secured Debt | VIE primary beneficiary      
Debt Instrument [Line Items]      
Repayments of debt $ 400,000,000    
Duke Energy Florida | DEFR Accounts Receivable Securitization Facility Maturing April 2024 | Secured Debt | VIE primary beneficiary      
Debt Instrument [Line Items]      
Repayments of debt     $ 325,000,000
v3.25.1
Debt and Credit Facilities (Narrative) (Details) - USD ($)
 1 Months Ended 2 Months Ended
Nov. 07, 2024
Apr. 30, 2025
Jan. 31, 2024
Dec. 31, 2022
Mar. 31, 2022
Feb. 28, 2025
Dec. 31, 2024
Mar. 31, 2025
Mar. 30, 2025
Mar. 30, 2022
Master Credit Facility                    
Debt Instrument [Line Items]                    
Facility size               $ 10,000,000,000 $ 9,000,000,000  
June 2017 Three Year Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Facility term (in years)         3 years          
Duke Energy Florida | Master Credit Facility                    
Debt Instrument [Line Items]                    
Facility size               1,425,000,000    
Duke Energy Progress | Master Credit Facility                    
Debt Instrument [Line Items]                    
Facility size               1,675,000,000    
Duke Energy Carolinas | Master Credit Facility                    
Debt Instrument [Line Items]                    
Facility size               1,300,000,000    
Term Loan Facility | Duke Energy Term Loan Facility                    
Debt Instrument [Line Items]                    
Facility term (in years) 2 years                  
Term Loan Facility | Duke Energy (Parent) | Master Credit Facility                    
Debt Instrument [Line Items]                    
Facility size         $ 1,400,000,000         $ 1,000,000,000
Repayments of debt     $ 1,000,000,000 $ 400,000,000            
Term Loan Facility | Duke Energy Florida | Duke Energy Term Loan Facility                    
Debt Instrument [Line Items]                    
Facility size $ 800,000,000             800,000,000    
Facility term (in years) 364 days                  
Extension period (in years) 4 months                  
Borrowing amount           $ 700,000,000 $ 100,000,000      
Increase in term loan facility $ 400,000,000                  
Term Loan Facility | Duke Energy Progress | Duke Energy Term Loan Facility                    
Debt Instrument [Line Items]                    
Facility size $ 250,000,000             250,000,000    
Extension period (in years) 6 months                  
Borrowing amount           65,000,000 185,000,000      
Increase in term loan facility $ 150,000,000                  
Term Loan Facility | Duke Energy Carolinas | Duke Energy Term Loan Facility                    
Debt Instrument [Line Items]                    
Facility size $ 700,000,000             $ 600,000,000    
Extension period (in years) 6 months                  
Borrowing amount           $ 145,000,000 $ 455,000,000      
Increase in term loan facility $ 300,000,000                  
Term Loan Facility | Duke Energy Carolinas | Duke Energy Term Loan Facility | Subsequent event                    
Debt Instrument [Line Items]                    
Borrowing amount   $ 100,000,000                
v3.25.1
Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Current maturities of long-term debt $ 4,180 $ 4,349
Other debt securities    
Debt Instrument [Line Items]    
Current maturities of long-term debt $ 292  
Duke Energy (Parent) | Debt Maturing April 2025, 3.364% Coupon | Unsecured Debt    
Debt Instrument [Line Items]    
Interest rate (as a percent) 3.364%  
Current maturities of long-term debt $ 420  
Duke Energy (Parent) | Debt Maturing April 2025, 3.950% Coupon | Unsecured Debt    
Debt Instrument [Line Items]    
Interest rate (as a percent) 3.95%  
Current maturities of long-term debt $ 250  
Duke Energy (Parent) | Debt Maturing September 2025, 0.900% Coupon | Unsecured Debt    
Debt Instrument [Line Items]    
Interest rate (as a percent) 0.90%  
Current maturities of long-term debt $ 650  
Duke Energy (Parent) | Debt Maturing December 2025, 5.000% Coupon | Unsecured Debt    
Debt Instrument [Line Items]    
Interest rate (as a percent) 5.00%  
Current maturities of long-term debt $ 500  
Duke Energy Ohio    
Debt Instrument [Line Items]    
Current maturities of long-term debt $ 290 245
Duke Energy Ohio | Debt Maturing June 2025, 6.900% Coupon | Unsecured Debt    
Debt Instrument [Line Items]    
Interest rate (as a percent) 6.90%  
Current maturities of long-term debt $ 150  
Duke Energy Ohio | Debt Maturing October 2025, 3.230% Coupon | Unsecured Debt    
Debt Instrument [Line Items]    
Interest rate (as a percent) 3.23%  
Current maturities of long-term debt $ 95  
Piedmont    
Debt Instrument [Line Items]    
Current maturities of long-term debt $ 205 205
Piedmont | Debt Maturing September 2025, 3.600% Coupon | Unsecured Debt    
Debt Instrument [Line Items]    
Interest rate (as a percent) 3.60%  
Current maturities of long-term debt $ 150  
Duke Energy Carolinas    
Debt Instrument [Line Items]    
Current maturities of long-term debt 23 521
Duke Energy Progress    
Debt Instrument [Line Items]    
Current maturities of long-term debt $ 581 983
Duke Energy Progress | 3.250% Notes Due August 2025 | First Mortgage Bonds    
Debt Instrument [Line Items]    
Interest rate (as a percent) 3.25%  
Current maturities of long-term debt $ 500  
Duke Energy Florida    
Debt Instrument [Line Items]    
Current maturities of long-term debt $ 1,235 $ 534
Duke Energy Florida | Debt Maturing October 2025, 5.303% Coupon | Unsecured Debt    
Debt Instrument [Line Items]    
Interest rate (as a percent) 5.068%  
Current maturities of long-term debt $ 800  
Duke Energy Florida | 4.998% Notes Due October 2073 | First Mortgage Bonds    
Debt Instrument [Line Items]    
Interest rate (as a percent) 4.282%  
Current maturities of long-term debt $ 200  
Duke Energy Florida | 4.970% Notes Due April 2074 | First Mortgage Bonds    
Debt Instrument [Line Items]    
Interest rate (as a percent) 4.282%  
Current maturities of long-term debt $ 173  
Duke Energy Florida | 4.998% Notes Due October 2073 And 4.970% Notes Due April 2074 | First Mortgage Bonds    
Debt Instrument [Line Items]    
Facility term (in years) 12 months  
v3.25.1
Debt and Credit Facilities (Schedule of Line of Credit Facilities) (Details) - Master Credit Facility - USD ($)
Mar. 31, 2025
Mar. 30, 2025
Line of Credit Facility [Line Items]    
Facility size $ 10,000,000,000 $ 9,000,000,000
Commercial paper (2,103,000,000)  
Outstanding letters of credit (10,000,000)  
Tax-exempt bonds (81,000,000)  
Available capacity under the Master Credit Facility 7,806,000,000  
Duke Energy Carolinas    
Line of Credit Facility [Line Items]    
Facility size 1,300,000,000  
Commercial paper (300,000,000)  
Outstanding letters of credit (4,000,000)  
Tax-exempt bonds 0  
Available capacity under the Master Credit Facility 996,000,000  
Duke Energy Progress    
Line of Credit Facility [Line Items]    
Facility size 1,675,000,000  
Commercial paper (150,000,000)  
Outstanding letters of credit (1,000,000)  
Tax-exempt bonds 0  
Available capacity under the Master Credit Facility 1,524,000,000  
Duke Energy Florida    
Line of Credit Facility [Line Items]    
Facility size 1,425,000,000  
Commercial paper 0  
Outstanding letters of credit (3,000,000)  
Tax-exempt bonds 0  
Available capacity under the Master Credit Facility 1,422,000,000  
Duke Energy Ohio    
Line of Credit Facility [Line Items]    
Facility size 1,075,000,000  
Commercial paper (52,000,000)  
Outstanding letters of credit 0  
Tax-exempt bonds 0  
Available capacity under the Master Credit Facility 1,023,000,000  
Duke Energy Indiana    
Line of Credit Facility [Line Items]    
Facility size 950,000,000  
Commercial paper (152,000,000)  
Outstanding letters of credit 0  
Tax-exempt bonds (81,000,000)  
Available capacity under the Master Credit Facility 717,000,000  
Piedmont    
Line of Credit Facility [Line Items]    
Facility size 1,050,000,000  
Commercial paper (68,000,000)  
Outstanding letters of credit 0  
Tax-exempt bonds 0  
Available capacity under the Master Credit Facility 982,000,000  
Duke Energy (Parent) | Proceeds loaned to subsidiary registrants    
Line of Credit Facility [Line Items]    
Commercial paper (625,000,000)  
Duke Energy (Parent) | Duke Energy (Parent)    
Line of Credit Facility [Line Items]    
Facility size 2,525,000,000  
Commercial paper (1,381,000,000)  
Outstanding letters of credit (2,000,000)  
Tax-exempt bonds 0  
Available capacity under the Master Credit Facility $ 1,142,000,000  
v3.25.1
Goodwill (Details) - USD ($)
Mar. 31, 2025
Dec. 31, 2024
Goodwill [Line Items]    
Goodwill $ 19,303,000,000 $ 19,303,000,000
Accumulated impairment charges 0 0
Duke Energy Ohio    
Goodwill [Line Items]    
Goodwill 920,000,000 920,000,000
Accumulated impairment charges 216,000,000 216,000,000
Progress Energy    
Goodwill [Line Items]    
Goodwill 3,655,000,000 3,655,000,000
Piedmont    
Goodwill [Line Items]    
Goodwill 49,000,000 49,000,000
Electric Utilities and Infrastructure    
Goodwill [Line Items]    
Goodwill 17,400,000,000 17,400,000,000
Electric Utilities and Infrastructure | Duke Energy Ohio    
Goodwill [Line Items]    
Goodwill 596,000,000 596,000,000
Electric Utilities and Infrastructure | Progress Energy    
Goodwill [Line Items]    
Accumulated impairment charges 0 0
Gas Utilities and Infrastructure    
Goodwill [Line Items]    
Goodwill 1,900,000,000 1,900,000,000
Gas Utilities and Infrastructure | Duke Energy Ohio    
Goodwill [Line Items]    
Goodwill 324,000,000 324,000,000
Gas Utilities and Infrastructure | Piedmont    
Goodwill [Line Items]    
Accumulated impairment charges $ 0 $ 0
v3.25.1
Related Party Transactions (Other Revenue and Expense) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party $ 5,912 $ 5,720
Duke Energy Carolinas    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 1,821 1,803
Duke Energy Carolinas | Corporate governance and shared service expenses | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 178 214
Duke Energy Carolinas | Indemnification coverages | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 13 11
Duke Energy Carolinas | JDA | Duke Energy Progress    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 116 40
Related party transaction, other revenues from transactions with related party 82 16
Duke Energy Carolinas | Intercompany natural gas purchases and sales | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 2 4
Progress Energy    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 2,597 2,516
Progress Energy | Corporate governance and shared service expenses | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 150 188
Progress Energy | Indemnification coverages | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 16 14
Progress Energy | JDA | Duke Energy Carolinas    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 82 16
Related party transaction, other revenues from transactions with related party 116 40
Progress Energy | Intercompany natural gas purchases and sales | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 19 19
Duke Energy Progress    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 1,540 1,385
Duke Energy Progress | Corporate governance and shared service expenses | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 86 114
Duke Energy Progress | Indemnification coverages | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 7 6
Duke Energy Progress | JDA | Duke Energy Carolinas    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 82 16
Related party transaction, other revenues from transactions with related party 116 40
Duke Energy Progress | Intercompany natural gas purchases and sales | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 19 19
Duke Energy Florida    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 1,053 1,128
Duke Energy Florida | Corporate governance and shared service expenses | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 64 74
Duke Energy Florida | Indemnification coverages | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 9 8
Duke Energy Ohio    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 602 526
Duke Energy Ohio | Corporate governance and shared service expenses | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 64 77
Duke Energy Ohio | Indemnification coverages | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 1 2
Duke Energy Indiana    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 665 634
Duke Energy Indiana | Corporate governance and shared service expenses | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 71 102
Duke Energy Indiana | Indemnification coverages | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 2 2
Piedmont    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 456 342
Piedmont | Corporate governance and shared service expenses | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 31 41
Piedmont | Indemnification coverages | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party 1 1
Piedmont | Intercompany natural gas purchases and sales | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, other revenues from transactions with related party 21 23
Piedmont | Natural gas storage and transportation costs | Related Party    
Related Party Transaction [Line Items]    
Related party transaction, expenses from transactions with related party $ 5 $ 6
v3.25.1
Related Party Transactions (Intercompany Income Taxes) (Details) - Related Party - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Duke Energy Carolinas    
Related Party Transaction [Line Items]    
Intercompany income tax receivable   $ 0
Intercompany income tax payable $ 53 419
Progress Energy    
Related Party Transaction [Line Items]    
Intercompany income tax receivable   0
Intercompany income tax payable 55 169
Duke Energy Progress    
Related Party Transaction [Line Items]    
Intercompany income tax receivable   0
Intercompany income tax payable 14 315
Duke Energy Florida    
Related Party Transaction [Line Items]    
Intercompany income tax receivable   154
Intercompany income tax payable 40 0
Duke Energy Ohio    
Related Party Transaction [Line Items]    
Intercompany income tax receivable   0
Intercompany income tax payable 35 43
Duke Energy Indiana    
Related Party Transaction [Line Items]    
Intercompany income tax receivable   0
Intercompany income tax payable 31 110
Piedmont    
Related Party Transaction [Line Items]    
Intercompany income tax receivable   0
Intercompany income tax payable $ 87 $ 43
v3.25.1
Derivatives and Hedging (Notional Amounts of Derivative Instruments) (Details)
Mcf in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Mar. 31, 2025
USD ($)
GWh
Mcf
Jun. 30, 2024
GWh
Mcf
Dec. 31, 2024
USD ($)
Interest Rate Contracts      
Derivative [Line Items]      
Notional amount $ 6,502   $ 6,027
Commodity contracts | Electricity (GWh)      
Derivative [Line Items]      
Notional amount, energy measure (in gigawatt-hours) | GWh 4,679 12,229  
Commodity contracts | Natural gas (millions of dekatherms)      
Derivative [Line Items]      
Notional amount, volume (in millions of dekatherms) | Mcf 780 779  
Designated contracts | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount $ 2,975   2,825
Undesignated contracts | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount 3,527   3,202
Duke Energy Carolinas | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount $ 1,425   1,150
Duke Energy Carolinas | Commodity contracts | Electricity (GWh)      
Derivative [Line Items]      
Notional amount, energy measure (in gigawatt-hours) | GWh 0 0  
Duke Energy Carolinas | Commodity contracts | Natural gas (millions of dekatherms)      
Derivative [Line Items]      
Notional amount, volume (in millions of dekatherms) | Mcf 288 276  
Duke Energy Carolinas | Designated contracts | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount $ 0   0
Duke Energy Carolinas | Undesignated contracts | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount 1,425   1,150
Progress Energy | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount $ 1,625   1,775
Progress Energy | Commodity contracts | Electricity (GWh)      
Derivative [Line Items]      
Notional amount, energy measure (in gigawatt-hours) | GWh 0 0  
Progress Energy | Commodity contracts | Natural gas (millions of dekatherms)      
Derivative [Line Items]      
Notional amount, volume (in millions of dekatherms) | Mcf 250 246  
Progress Energy | Designated contracts | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount $ 0   0
Progress Energy | Undesignated contracts | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount 1,625   1,775
Duke Energy Progress | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount $ 500   1,125
Duke Energy Progress | Commodity contracts | Electricity (GWh)      
Derivative [Line Items]      
Notional amount, energy measure (in gigawatt-hours) | GWh 0 0  
Duke Energy Progress | Commodity contracts | Natural gas (millions of dekatherms)      
Derivative [Line Items]      
Notional amount, volume (in millions of dekatherms) | Mcf 250 246  
Duke Energy Progress | Designated contracts | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount $ 0   0
Duke Energy Progress | Undesignated contracts | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount 500   1,125
Duke Energy Florida | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount 1,125   650
Duke Energy Florida | Designated contracts | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount 0   0
Duke Energy Florida | Undesignated contracts | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount 1,125   650
Duke Energy Indiana | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount $ 450   250
Duke Energy Indiana | Commodity contracts | Electricity (GWh)      
Derivative [Line Items]      
Notional amount, energy measure (in gigawatt-hours) | GWh 4,161 10,942  
Duke Energy Indiana | Commodity contracts | Natural gas (millions of dekatherms)      
Derivative [Line Items]      
Notional amount, volume (in millions of dekatherms) | Mcf 26 32  
Duke Energy Indiana | Designated contracts | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount $ 0   0
Duke Energy Indiana | Undesignated contracts | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount 450   250
Duke Energy Ohio | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount $ 27   27
Duke Energy Ohio | Commodity contracts | Electricity (GWh)      
Derivative [Line Items]      
Notional amount, energy measure (in gigawatt-hours) | GWh 518 1,287  
Duke Energy Ohio | Commodity contracts | Natural gas (millions of dekatherms)      
Derivative [Line Items]      
Notional amount, volume (in millions of dekatherms) | Mcf 0 0  
Duke Energy Ohio | Designated contracts | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount $ 0   0
Duke Energy Ohio | Undesignated contracts | Interest Rate Contracts      
Derivative [Line Items]      
Notional amount $ 27   $ 27
Piedmont | Commodity contracts | Electricity (GWh)      
Derivative [Line Items]      
Notional amount, energy measure (in gigawatt-hours) | GWh 0 0  
Piedmont | Commodity contracts | Natural gas (millions of dekatherms)      
Derivative [Line Items]      
Notional amount, volume (in millions of dekatherms) | Mcf 216 225  
v3.25.1
Derivatives and Hedging (Foreign Exchange Risk) (Details) - Foreign Currency Contracts - Designated contracts
€ in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Mar. 31, 2025
EUR (€)
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Notional amount $ 1,997    
Receive notional | €     € 1,850
Fair value gain (loss) 86 $ 4  
Senior Notes, 3.10% Due June 2028      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Notional amount $ 645    
Pay Rate 4.75%   4.75%
Receive notional | €     € 600
Rate 0.0310   0.0310
Fair value gain (loss) $ 28 2  
Senior Notes, 3.85% Due June 2034      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Notional amount $ 537    
Pay Rate 5.31%   5.31%
Receive notional | €     € 500
Rate 0.0385   0.0385
Fair value gain (loss) $ 23 2  
Senior Notes, 3.75% Due April 2031      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Notional amount $ 815    
Pay Rate 5.65%   5.65%
Receive notional | €     € 750
Rate 0.0375   0.0375
Fair value gain (loss) $ 35 $ 0  
v3.25.1
Derivatives and Hedging (Location and Fair Value Amounts of Derivatives Reflected in the Condensed Consolidated Balance Sheets) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) $ 472 $ 434
Location and fair value amounts of derivatives (Liability) 272 319
Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 320 267
Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 152 167
Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 104 145
Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 168 174
Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 294 109
Location and fair value amounts of derivatives (Liability) 185 242
Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 167 320
Location and fair value amounts of derivatives (Liability) 34 3
Foreign Currency Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 11 5
Location and fair value amounts of derivatives (Liability) 53 74
Not Designated as Hedging Instruments | Commodity Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 210 49
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 84 60
Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 55 108
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 130 134
Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 36 110
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 30 50
Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 9 2
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 18 1
Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 74  
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 27  
Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   108
Location and fair value amounts of derivatives (Liability) 7  
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   52
Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 11  
Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 33 35
Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   5
Location and fair value amounts of derivatives (Liability) 20 39
Duke Energy Carolinas    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 159 94
Location and fair value amounts of derivatives (Liability) 64 88
Duke Energy Carolinas | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 102 39
Duke Energy Carolinas | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 57 55
Duke Energy Carolinas | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 32 57
Duke Energy Carolinas | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 32 31
Duke Energy Carolinas | Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 143 49
Location and fair value amounts of derivatives (Liability) 57 88
Duke Energy Carolinas | Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 16 45
Location and fair value amounts of derivatives (Liability) 7 0
Duke Energy Carolinas | Foreign Currency Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 102 20
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 41 29
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 32 57
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 25 31
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   19
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 16 26
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 7 0
Duke Energy Carolinas | Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Duke Energy Carolinas | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Duke Energy Carolinas | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Location and fair value amounts of derivatives (Liability) 0  
Duke Energy Carolinas | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Duke Energy Carolinas | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Duke Energy Carolinas | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Carolinas | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Location and fair value amounts of derivatives (Liability) 0  
Progress Energy    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 147 127
Location and fair value amounts of derivatives (Liability) 37 58
Progress Energy | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 90 72
Progress Energy | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 57 55
Progress Energy | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 10 34
Progress Energy | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 27 24
Progress Energy | Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 129 49
Location and fair value amounts of derivatives (Liability) 20 56
Progress Energy | Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 18 78
Location and fair value amounts of derivatives (Liability) 17 2
Progress Energy | Foreign Currency Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Location and fair value amounts of derivatives (Liability) 0 0
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 86 17
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 43 32
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 1 32
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 19 24
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 4 55
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 14 23
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 9 2
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 8 0
Progress Energy | Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Progress Energy | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Progress Energy | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Location and fair value amounts of derivatives (Liability) 0  
Progress Energy | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Progress Energy | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Progress Energy | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Progress Energy | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Location and fair value amounts of derivatives (Liability) 0  
Duke Energy Progress    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 139 109
Location and fair value amounts of derivatives (Liability) 25 57
Duke Energy Progress | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 86 61
Duke Energy Progress | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 53 48
Duke Energy Progress | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 1 33
Duke Energy Progress | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 24 24
Duke Energy Progress | Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 129 49
Location and fair value amounts of derivatives (Liability) 20 56
Duke Energy Progress | Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 10 60
Location and fair value amounts of derivatives (Liability) 5 1
Duke Energy Progress | Foreign Currency Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 86 17
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 43 32
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 1 32
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 19 24
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   44
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 10 16
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability)   1
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 5 0
Duke Energy Progress | Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Duke Energy Progress | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Duke Energy Progress | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Location and fair value amounts of derivatives (Liability) 0  
Duke Energy Progress | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Duke Energy Progress | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Duke Energy Progress | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Progress | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Location and fair value amounts of derivatives (Liability) 0  
Duke Energy Florida    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 8 18
Location and fair value amounts of derivatives (Liability) 13 1
Duke Energy Florida | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 4 11
Duke Energy Florida | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 4 7
Duke Energy Florida | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 9 1
Duke Energy Florida | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 4 0
Duke Energy Florida | Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Florida | Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 8 18
Location and fair value amounts of derivatives (Liability) 13 1
Duke Energy Florida | Foreign Currency Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 4 11
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 4 7
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 9 1
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 4 0
Duke Energy Florida | Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Duke Energy Florida | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Duke Energy Florida | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Location and fair value amounts of derivatives (Liability) 0  
Duke Energy Florida | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Duke Energy Florida | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Duke Energy Florida | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Florida | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Location and fair value amounts of derivatives (Liability) 0  
Duke Energy Ohio    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 1 1
Location and fair value amounts of derivatives (Liability) 1 1
Duke Energy Ohio | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 1 1
Duke Energy Ohio | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Duke Energy Ohio | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Ohio | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 1 1
Duke Energy Ohio | Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 1 1
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Ohio | Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Location and fair value amounts of derivatives (Liability) 1 1
Duke Energy Ohio | Foreign Currency Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 1 1
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 1 1
Duke Energy Ohio | Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Duke Energy Ohio | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Duke Energy Ohio | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Location and fair value amounts of derivatives (Liability) 0  
Duke Energy Ohio | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Duke Energy Ohio | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Duke Energy Ohio | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Ohio | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Location and fair value amounts of derivatives (Liability) 0  
Duke Energy Indiana    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 53 44
Location and fair value amounts of derivatives (Liability) 3 3
Duke Energy Indiana | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 53 44
Duke Energy Indiana | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Duke Energy Indiana | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 3
Duke Energy Indiana | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 3 0
Duke Energy Indiana | Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 21 8
Location and fair value amounts of derivatives (Liability) 0 3
Duke Energy Indiana | Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 32 36
Location and fair value amounts of derivatives (Liability) 3 0
Duke Energy Indiana | Foreign Currency Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 21 8
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 3
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 32 36
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 3 0
Duke Energy Indiana | Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Duke Energy Indiana | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Duke Energy Indiana | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Location and fair value amounts of derivatives (Liability) 0  
Duke Energy Indiana | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Duke Energy Indiana | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Duke Energy Indiana | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Duke Energy Indiana | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Location and fair value amounts of derivatives (Liability) 0  
Piedmont    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 1
Location and fair value amounts of derivatives (Liability) 108 94
Piedmont | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 1
Piedmont | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Piedmont | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 22 16
Piedmont | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 86 78
Piedmont | Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 1
Location and fair value amounts of derivatives (Liability) 108 94
Piedmont | Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Location and fair value amounts of derivatives (Liability) 0 0
Piedmont | Foreign Currency Contracts    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Location and fair value amounts of derivatives (Liability) 0 0
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 1
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 22 16
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 86 78
Piedmont | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Piedmont | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0 0
Piedmont | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Piedmont | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Piedmont | Designated as Hedging Instruments | Interest Rate Contracts | Current assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Piedmont | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Piedmont | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Location and fair value amounts of derivatives (Liability) 0  
Piedmont | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   0
Piedmont | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset) 0  
Piedmont | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Liability) 0 0
Piedmont | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Location and fair value amounts of derivatives (Asset)   $ 0
Location and fair value amounts of derivatives (Liability) $ 0  
v3.25.1
Derivatives and Hedging (Schedule of Offsetting Assets) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized $ 472 $ 434
Derivative Asset, Current 316 238
Net amounts presented in Current Assets: Other 114 130
Current assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 320 267
Offset (1) $ (29)
Cash collateral received $ (3)  
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration] Current Assets: Other Current Assets: Other
Noncurrent assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized $ 152 $ 167
Offset (36) $ (37)
Cash collateral received $ (2)  
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other Other
Duke Energy Carolinas    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized $ 159 $ 94
Derivative Asset, Current 98 24
Net amounts presented in Current Assets: Other 37 36
Duke Energy Carolinas | Current assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 102 39
Offset (1) (15)
Cash collateral received (3)  
Duke Energy Carolinas | Noncurrent assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 57 55
Offset (18) (19)
Cash collateral received (2)  
Progress Energy    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 147 127
Derivative Asset, Current 89 58
Net amounts presented in Current Assets: Other 39 38
Progress Energy | Current assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 90 72
Offset (1) (14)
Progress Energy | Noncurrent assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 57 55
Offset (18) (17)
Duke Energy Progress    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 139 109
Derivative Asset, Current 85 47
Net amounts presented in Current Assets: Other 35 31
Duke Energy Progress | Current assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 86 61
Offset (1) (14)
Duke Energy Progress | Noncurrent assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 53 48
Offset (18) (17)
Duke Energy Florida    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 8 18
Derivative Asset, Current 4 11
Net amounts presented in Current Assets: Other 4 7
Duke Energy Florida | Current assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 4 11
Offset 0 0
Duke Energy Florida | Noncurrent assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 4 7
Offset 0 0
Duke Energy Ohio    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 1 1
Derivative Asset, Current 1 1
Net amounts presented in Current Assets: Other 0 0
Duke Energy Ohio | Current assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 1 1
Offset 0 0
Duke Energy Ohio | Noncurrent assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 0 0
Offset 0 0
Duke Energy Indiana    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 53 44
Derivative Asset, Current 53 44
Net amounts presented in Current Assets: Other 0 0
Duke Energy Indiana | Current assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 53 44
Offset 0 0
Duke Energy Indiana | Noncurrent assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 0 0
Offset 0 0
Piedmont    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 0 1
Derivative Asset, Current 0 1
Net amounts presented in Current Assets: Other 0 0
Piedmont | Current assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 0 1
Offset 0 0
Piedmont | Noncurrent assets    
Offsetting Derivative Assets [Abstract]    
Gross amounts recognized 0 0
Offset $ 0 $ 0
v3.25.1
Derivatives and Hedging (Schedule of Offsetting Liabilities) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized $ 272 $ 319
Net amounts presented in Current Liabilities: Other 103 113
Net amounts presented in Other Noncurrent Liabilities: Other 132 133
Current liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 104 145
Offset $ (1) (29)
Cash collateral posted   $ (3)
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Current Liabilities: Other Current Liabilities: Other
Noncurrent liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized $ 168 $ 174
Offset $ (36) (37)
Cash collateral posted   $ (4)
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other Other
Duke Energy Carolinas    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized $ 64 $ 88
Net amounts presented in Current Liabilities: Other 31 40
Net amounts presented in Other Noncurrent Liabilities: Other 14 8
Duke Energy Carolinas | Current liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 32 57
Offset (1) (15)
Cash collateral posted   (2)
Duke Energy Carolinas | Noncurrent liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 32 31
Offset (18) (19)
Cash collateral posted   (4)
Progress Energy    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 37 58
Net amounts presented in Current Liabilities: Other 9 20
Net amounts presented in Other Noncurrent Liabilities: Other 9 7
Progress Energy | Current liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 10 34
Offset (1) (14)
Cash collateral posted   0
Progress Energy | Noncurrent liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 27 24
Offset (18) (17)
Cash collateral posted   0
Duke Energy Progress    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 25 57
Net amounts presented in Current Liabilities: Other 0 19
Net amounts presented in Other Noncurrent Liabilities: Other 6 7
Duke Energy Progress | Current liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 1 33
Offset (1) (14)
Cash collateral posted   0
Duke Energy Progress | Noncurrent liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 24 24
Offset (18) (17)
Cash collateral posted   0
Duke Energy Florida    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 13 1
Net amounts presented in Current Liabilities: Other 9 1
Net amounts presented in Other Noncurrent Liabilities: Other 4 0
Duke Energy Florida | Current liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 9 1
Offset 0 0
Cash collateral posted   0
Duke Energy Florida | Noncurrent liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 4 0
Offset 0 0
Cash collateral posted   0
Duke Energy Ohio    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 1 1
Net amounts presented in Current Liabilities: Other 0 0
Net amounts presented in Other Noncurrent Liabilities: Other 1 1
Duke Energy Ohio | Current liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 0 0
Offset 0 0
Cash collateral posted   0
Duke Energy Ohio | Noncurrent liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 1 1
Offset 0 0
Cash collateral posted   0
Duke Energy Indiana    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 3 3
Net amounts presented in Current Liabilities: Other 0 2
Net amounts presented in Other Noncurrent Liabilities: Other 3 0
Duke Energy Indiana | Current liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 0 3
Offset 0 0
Cash collateral posted   (1)
Duke Energy Indiana | Noncurrent liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 3 0
Offset 0 0
Cash collateral posted   0
Piedmont    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 108 94
Net amounts presented in Current Liabilities: Other 22 16
Net amounts presented in Other Noncurrent Liabilities: Other 86 78
Piedmont | Current liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 22 16
Offset 0 0
Cash collateral posted   0
Piedmont | Noncurrent liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 86 78
Offset $ 0 0
Cash collateral posted   $ 0
v3.25.1
Derivatives and Hedging (Derivative Instruments with Credit-Risk Related Contingent Features and Cash Collateral) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features    
Aggregate fair value of derivatives in a net liability position $ 31 $ 101
Fair value of collateral already posted   6
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered 31 95
Duke Energy Carolinas    
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features    
Aggregate fair value of derivatives in a net liability position 20 52
Fair value of collateral already posted   6
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered 20 46
Progress Energy    
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features    
Aggregate fair value of derivatives in a net liability position 11 49
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered 11 49
Duke Energy Progress    
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features    
Aggregate fair value of derivatives in a net liability position 11 49
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered $ 11 $ 49
v3.25.1
Investments in Debt and Equity Securities (Estimated Fair Value of Investments in Debt and Equity Securities) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale    
Estimated Fair Value $ 3,528  
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]    
Unrealized Holding Gains 5,492 $ 5,804
Unrealized Holding Losses 209 219
Estimated Fair Value 11,792 11,905
NDTF    
Cash and Cash Equivalents    
Estimated Fair Value 128 139
Equity Securities, FV-NI    
Gross Unrealized Holding Gains 5,430 5,753
Gross Unrealized Holding Losses 85 61
Estimated Fair Value 7,828 8,233
Debt Securities, Available-for-sale    
Estimated Fair Value 3,288 3,060
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]    
Unrealized Holding Gains 5,456 5,765
Unrealized Holding Losses 194 200
Estimated Fair Value 11,244 11,432
Other Investments    
Cash and Cash Equivalents    
Estimated Fair Value 195 47
Equity Securities, FV-NI    
Gross Unrealized Holding Gains 36 39
Gross Unrealized Holding Losses 3 4
Estimated Fair Value 113 160
Debt Securities, Available-for-sale    
Estimated Fair Value 240 266
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]    
Unrealized Holding Gains 36 39
Unrealized Holding Losses 15 19
Estimated Fair Value 548 473
Duke Energy Carolinas    
Debt Securities, Available-for-sale    
Estimated Fair Value 1,811  
Duke Energy Carolinas | NDTF    
Cash and Cash Equivalents    
Estimated Fair Value 53 62
Equity Securities, FV-NI    
Gross Unrealized Holding Gains 3,185 3,386
Gross Unrealized Holding Losses 40 33
Estimated Fair Value 4,512 4,751
Debt Securities, Available-for-sale    
Estimated Fair Value 1,811 1,651
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]    
Unrealized Holding Gains 3,198 3,389
Unrealized Holding Losses 109 122
Estimated Fair Value 6,376 6,464
Progress Energy    
Debt Securities, Available-for-sale    
Estimated Fair Value 1,501  
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]    
Unrealized Holding Gains 2,258 2,376
Unrealized Holding Losses 85 78
Estimated Fair Value 4,913 5,015
Progress Energy | NDTF    
Cash and Cash Equivalents    
Estimated Fair Value 75 77
Equity Securities, FV-NI    
Gross Unrealized Holding Gains 2,245 2,367
Gross Unrealized Holding Losses 45 28
Estimated Fair Value 3,316 3,482
Debt Securities, Available-for-sale    
Estimated Fair Value 1,477 1,409
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]    
Unrealized Holding Gains 2,258 2,376
Unrealized Holding Losses 85 78
Estimated Fair Value 4,868 4,968
Progress Energy | Other Investments    
Cash and Cash Equivalents    
Estimated Fair Value 21 23
Debt Securities, Available-for-sale    
Estimated Fair Value 24 24
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]    
Unrealized Holding Gains 0 0
Unrealized Holding Losses 0 0
Estimated Fair Value 45 47
Duke Energy Progress    
Debt Securities, Available-for-sale    
Estimated Fair Value 1,300  
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]    
Unrealized Holding Gains 2,152 2,265
Unrealized Holding Losses 79 70
Estimated Fair Value 4,577 4,653
Duke Energy Progress | NDTF    
Cash and Cash Equivalents    
Estimated Fair Value 62 54
Equity Securities, FV-NI    
Gross Unrealized Holding Gains 2,139 2,256
Gross Unrealized Holding Losses 45 28
Estimated Fair Value 3,201 3,362
Debt Securities, Available-for-sale    
Estimated Fair Value 1,300 1,221
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]    
Unrealized Holding Gains 2,152 2,265
Unrealized Holding Losses 79 70
Estimated Fair Value 4,563 4,637
Duke Energy Progress | Other Investments    
Cash and Cash Equivalents    
Estimated Fair Value 14 16
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]    
Unrealized Holding Gains 0 0
Unrealized Holding Losses 0 0
Estimated Fair Value 14 16
Duke Energy Florida    
Debt Securities, Available-for-sale    
Estimated Fair Value 201  
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]    
Unrealized Holding Gains 106 111
Unrealized Holding Losses 6 8
Estimated Fair Value 332 358
Duke Energy Florida | NDTF    
Cash and Cash Equivalents    
Estimated Fair Value 13 23
Equity Securities, FV-NI    
Gross Unrealized Holding Gains 106 111
Gross Unrealized Holding Losses 0 0
Estimated Fair Value 115 120
Debt Securities, Available-for-sale    
Estimated Fair Value 177 188
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]    
Unrealized Holding Gains 106 111
Unrealized Holding Losses 6 8
Estimated Fair Value 305 331
Duke Energy Florida | Other Investments    
Cash and Cash Equivalents    
Estimated Fair Value 3 3
Debt Securities, Available-for-sale    
Estimated Fair Value 24 24
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]    
Unrealized Holding Gains 0 0
Unrealized Holding Losses 0 0
Estimated Fair Value 27 27
Duke Energy Indiana    
Debt Securities, Available-for-sale    
Estimated Fair Value 26  
Duke Energy Indiana | Other Investments    
Cash and Cash Equivalents    
Estimated Fair Value 2 1
Equity Securities, FV-NI    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 3 4
Estimated Fair Value 43 89
Debt Securities, Available-for-sale    
Estimated Fair Value 26 56
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]    
Unrealized Holding Gains 0 0
Unrealized Holding Losses 4 5
Estimated Fair Value 71 146
Corporate debt securities | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 8 6
Gross Unrealized Holding Losses 29 33
Estimated Fair Value 793 673
Corporate debt securities | Other Investments    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 4 5
Estimated Fair Value 77 79
Corporate debt securities | Duke Energy Carolinas | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 3 2
Gross Unrealized Holding Losses 24 27
Estimated Fair Value 494 401
Corporate debt securities | Progress Energy | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 5 4
Gross Unrealized Holding Losses 5 6
Estimated Fair Value 299 272
Corporate debt securities | Duke Energy Progress | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 5 4
Gross Unrealized Holding Losses 5 6
Estimated Fair Value 283 256
Corporate debt securities | Duke Energy Florida | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 0 0
Estimated Fair Value 16 16
Corporate debt securities | Duke Energy Indiana | Other Investments    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 0 0
Estimated Fair Value 1 6
Municipal bonds | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 1 2
Gross Unrealized Holding Losses 18 14
Estimated Fair Value 341 342
Municipal bonds | Other Investments    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 1 1
Estimated Fair Value 63 83
Municipal bonds | Duke Energy Carolinas | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 6 4
Estimated Fair Value 34 36
Municipal bonds | Progress Energy | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 1 2
Gross Unrealized Holding Losses 12 10
Estimated Fair Value 307 306
Municipal bonds | Progress Energy | Other Investments    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 0 0
Estimated Fair Value 24 24
Municipal bonds | Duke Energy Progress | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 1 2
Gross Unrealized Holding Losses 12 10
Estimated Fair Value 307 306
Municipal bonds | Duke Energy Florida | Other Investments    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 0 0
Estimated Fair Value 24 24
Municipal bonds | Duke Energy Indiana | Other Investments    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 1 1
Estimated Fair Value 23 43
U.S. government bonds | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 15 3
Gross Unrealized Holding Losses 55 84
Estimated Fair Value 1,904 1,806
U.S. government bonds | Other Investments    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 4 5
Estimated Fair Value 57 59
U.S. government bonds | Duke Energy Carolinas | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 8 0
Gross Unrealized Holding Losses 32 50
Estimated Fair Value 1,049 991
U.S. government bonds | Progress Energy | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 7 3
Gross Unrealized Holding Losses 23 34
Estimated Fair Value 855 815
U.S. government bonds | Duke Energy Progress | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 7 3
Gross Unrealized Holding Losses 17 26
Estimated Fair Value 696 645
U.S. government bonds | Duke Energy Florida | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 6 8
Estimated Fair Value 159 170
U.S. government bonds | Duke Energy Indiana | Other Investments    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 0 0
Estimated Fair Value 2 7
Other debt securities | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 2 1
Gross Unrealized Holding Losses 7 8
Estimated Fair Value 250 239
Other debt securities | Other Investments    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 3 4
Estimated Fair Value 43 45
Other debt securities | Duke Energy Carolinas | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 2 1
Gross Unrealized Holding Losses 7 8
Estimated Fair Value 234 223
Other debt securities | Progress Energy | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 0 0
Estimated Fair Value 16 16
Other debt securities | Duke Energy Progress | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 0 0
Estimated Fair Value 14 14
Other debt securities | Duke Energy Florida | NDTF    
Debt Securities, Available-for-sale    
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses 0 0
Estimated Fair Value $ 2 $ 2
v3.25.1
Investments in Debt and Equity Securities (Realized Gains and Losses) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
FV-NI:    
Realized gains $ 126 $ 68
Realized losses 41 18
AFS:    
Realized gains 10 10
Realized losses 20 14
Duke Energy Carolinas    
FV-NI:    
Realized gains 82 53
Realized losses 22 6
AFS:    
Realized gains 7 4
Realized losses 14 6
Progress Energy    
FV-NI:    
Realized gains 44 15
Realized losses 19 12
AFS:    
Realized gains 3 6
Realized losses 6 8
Duke Energy Progress    
FV-NI:    
Realized gains 44 15
Realized losses 19 12
AFS:    
Realized gains 3 6
Realized losses $ 6 $ 8
v3.25.1
Investments in Debt and Equity Securities (Maturities) (Details)
$ in Millions
Mar. 31, 2025
USD ($)
Debt Securities, Available-for-sale [Line Items]  
Due in one year or less $ 83
Due after one through five years 921
Due after five through 10 years 610
Due after 10 years 1,914
Total 3,528
Duke Energy Carolinas  
Debt Securities, Available-for-sale [Line Items]  
Due in one year or less 5
Due after one through five years 441
Due after five through 10 years 286
Due after 10 years 1,079
Total 1,811
Progress Energy  
Debt Securities, Available-for-sale [Line Items]  
Due in one year or less 75
Due after one through five years 414
Due after five through 10 years 273
Due after 10 years 739
Total 1,501
Duke Energy Progress  
Debt Securities, Available-for-sale [Line Items]  
Due in one year or less 19
Due after one through five years 334
Due after five through 10 years 258
Due after 10 years 689
Total 1,300
Duke Energy Florida  
Debt Securities, Available-for-sale [Line Items]  
Due in one year or less 56
Due after one through five years 80
Due after five through 10 years 15
Due after 10 years 50
Total 201
Duke Energy Indiana  
Debt Securities, Available-for-sale [Line Items]  
Due in one year or less 1
Due after one through five years 8
Due after five through 10 years 7
Due after 10 years 10
Total $ 26
v3.25.1
Fair Value Measurements (Fair Value Measurement Amounts for Assets and Liabilities) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt securities, available-for-sale $ 3,528  
Derivative assets 472 $ 434
Total assets 12,264 12,339
Derivative liabilities (272) (319)
Net assets (liabilities) 11,992 12,020
NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 128 139
Estimated Fair Value 7,828 8,233
Debt securities, available-for-sale 3,288 3,060
NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 7,828 8,233
Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 195 47
Estimated Fair Value 113 160
Debt securities, available-for-sale 240 266
Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 19 2
Total assets 9,366 9,625
Derivative liabilities 0 (3)
Net assets (liabilities) 9,366 9,622
Level 1 | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 128 139
Debt securities, available-for-sale 1,056 1,022
Level 1 | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 7,800 8,203
Level 1 | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 195 47
Estimated Fair Value 113 160
Debt securities, available-for-sale 55 52
Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 450 423
Total assets 2,869 2,677
Derivative liabilities (272) (316)
Net assets (liabilities) 2,597 2,361
Level 2 | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Debt securities, available-for-sale 2,232 2,038
Level 2 | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 2 2
Level 2 | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Estimated Fair Value 0 0
Debt securities, available-for-sale 185 214
Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 3 9
Total assets 3 9
Derivative liabilities 0 0
Net assets (liabilities) 3 9
Level 3 | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Debt securities, available-for-sale 0 0
Level 3 | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 0 0
Level 3 | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Estimated Fair Value 0 0
Debt securities, available-for-sale 0 0
Not Categorized    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 0 0
Total assets 26 28
Derivative liabilities 0 0
Net assets (liabilities) 26 28
Not Categorized | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Debt securities, available-for-sale 0 0
Not Categorized | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 26 28
Not Categorized | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Estimated Fair Value 0 0
Debt securities, available-for-sale 0 0
Duke Energy Carolinas    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt securities, available-for-sale 1,811  
Derivative assets 159 94
Total assets 6,535 6,558
Derivative liabilities (64) (88)
Net assets (liabilities) 6,471 6,470
Duke Energy Carolinas | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 53 62
Estimated Fair Value 4,512 4,751
Debt securities, available-for-sale 1,811 1,651
Duke Energy Carolinas | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 4,512 4,751
Duke Energy Carolinas | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 0 0
Total assets 5,062 5,303
Derivative liabilities 0 0
Net assets (liabilities) 5,062 5,303
Duke Energy Carolinas | Level 1 | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 53 62
Debt securities, available-for-sale 525 520
Duke Energy Carolinas | Level 1 | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 4,484 4,721
Duke Energy Carolinas | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 159 94
Total assets 1,447 1,227
Derivative liabilities (64) (88)
Net assets (liabilities) 1,383 1,139
Duke Energy Carolinas | Level 2 | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Debt securities, available-for-sale 1,286 1,131
Duke Energy Carolinas | Level 2 | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 2 2
Duke Energy Carolinas | Not Categorized    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 0 0
Total assets 26 28
Derivative liabilities 0 0
Net assets (liabilities) 26 28
Duke Energy Carolinas | Not Categorized | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Debt securities, available-for-sale 0 0
Duke Energy Carolinas | Not Categorized | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 26 28
Progress Energy    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt securities, available-for-sale 1,501  
Derivative assets 147 127
Total assets 5,060 5,142
Derivative liabilities (37) (58)
Net assets (liabilities) 5,023 5,084
Progress Energy | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 75 77
Estimated Fair Value 3,316 3,482
Debt securities, available-for-sale 1,477 1,409
Progress Energy | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 3,316 3,482
Progress Energy | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 21 23
Debt securities, available-for-sale 24 24
Progress Energy | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 0 0
Total assets 3,943 4,084
Derivative liabilities 0 0
Net assets (liabilities) 3,943 4,084
Progress Energy | Level 1 | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 75 77
Debt securities, available-for-sale 531 502
Progress Energy | Level 1 | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 3,316 3,482
Progress Energy | Level 1 | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 21 23
Debt securities, available-for-sale 0 0
Progress Energy | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 147 127
Total assets 1,117 1,058
Derivative liabilities (37) (58)
Net assets (liabilities) 1,080 1,000
Progress Energy | Level 2 | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Debt securities, available-for-sale 946 907
Progress Energy | Level 2 | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 0 0
Progress Energy | Level 2 | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Debt securities, available-for-sale 24 24
Duke Energy Progress    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt securities, available-for-sale 1,300  
Derivative assets 139 109
Total assets 4,716 4,762
Derivative liabilities (25) (57)
Net assets (liabilities) 4,691 4,705
Duke Energy Progress | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 62 54
Estimated Fair Value 3,201 3,362
Debt securities, available-for-sale 1,300 1,221
Duke Energy Progress | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 3,201 3,362
Duke Energy Progress | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 14 16
Duke Energy Progress | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 0 0
Total assets 3,676 3,797
Derivative liabilities 0 0
Net assets (liabilities) 3,676 3,797
Duke Energy Progress | Level 1 | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 62 54
Debt securities, available-for-sale 399 365
Duke Energy Progress | Level 1 | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 3,201 3,362
Duke Energy Progress | Level 1 | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 14 16
Duke Energy Progress | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 139 109
Total assets 1,040 965
Derivative liabilities (25) (57)
Net assets (liabilities) 1,015 908
Duke Energy Progress | Level 2 | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Debt securities, available-for-sale 901 856
Duke Energy Progress | Level 2 | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 0 0
Duke Energy Progress | Level 2 | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Duke Energy Florida    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt securities, available-for-sale 201  
Derivative assets 8 18
Total assets 340 376
Derivative liabilities (13) (1)
Net assets (liabilities) 327 375
Duke Energy Florida | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 13 23
Estimated Fair Value 115 120
Debt securities, available-for-sale 177 188
Duke Energy Florida | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 115 120
Duke Energy Florida | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 3 3
Debt securities, available-for-sale 24 24
Duke Energy Florida | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 0 0
Total assets 263 283
Derivative liabilities 0 0
Net assets (liabilities) 263 283
Duke Energy Florida | Level 1 | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 13 23
Debt securities, available-for-sale 132 137
Duke Energy Florida | Level 1 | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 115 120
Duke Energy Florida | Level 1 | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 3 3
Debt securities, available-for-sale 0 0
Duke Energy Florida | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 8 18
Total assets 77 93
Derivative liabilities (13) (1)
Net assets (liabilities) 64 92
Duke Energy Florida | Level 2 | NDTF    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Debt securities, available-for-sale 45 51
Duke Energy Florida | Level 2 | NDTF equity securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated Fair Value 0 0
Duke Energy Florida | Level 2 | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Debt securities, available-for-sale 24 24
Duke Energy Indiana    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt securities, available-for-sale 26  
Derivative assets 53 44
Total assets 124 190
Derivative liabilities (3) (3)
Net assets (liabilities) 121 187
Duke Energy Indiana | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 2 1
Estimated Fair Value 43 89
Debt securities, available-for-sale 26 56
Duke Energy Indiana | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 19 0
Total assets 64 90
Derivative liabilities 0 (3)
Net assets (liabilities) 64 87
Duke Energy Indiana | Level 1 | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 2 1
Estimated Fair Value 43 89
Debt securities, available-for-sale 0 0
Duke Energy Indiana | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 32 36
Total assets 58 92
Derivative liabilities (3) 0
Net assets (liabilities) 55 92
Duke Energy Indiana | Level 2 | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Estimated Fair Value 0 0
Debt securities, available-for-sale 26 56
Duke Energy Indiana | Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 2 8
Total assets 2 8
Derivative liabilities 0 0
Net assets (liabilities) 2 8
Duke Energy Indiana | Level 3 | Other Investments    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Estimated Fair Value 0 0
Debt securities, available-for-sale 0 0
Piedmont    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 0 1
Derivative liabilities (108) (94)
Net assets (liabilities) (108) (93)
Piedmont | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets   1
Derivative liabilities   0
Net assets (liabilities)   1
Piedmont | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 0 0
Derivative liabilities (108) (94)
Net assets (liabilities) $ (108) $ (94)
v3.25.1
Fair Value Measurements (Reconciliation of Assets and Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Derivatives (net)    
Balance at beginning of period $ 9 $ 15
Purchases, sales, issuances and settlements:    
Settlements (6) (13)
Total gains included on the Condensed Consolidated Balance Sheet 0 4
Balance at end of period 3 6
Duke Energy Indiana    
Derivatives (net)    
Balance at beginning of period 8 13
Purchases, sales, issuances and settlements:    
Settlements (6) (11)
Total gains included on the Condensed Consolidated Balance Sheet 0 3
Balance at end of period $ 2 $ 5
v3.25.1
Fair Value Measurements (Quantitative Level 3 Fair Value Disclosures) (Details)
$ in Millions
Mar. 31, 2025
USD ($)
$ / MWh
Dec. 31, 2024
USD ($)
$ / MWh
Mar. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Fair Value Measurement Inputs and Valuation Techniques        
Net derivative asset (liability) | $ $ 3 $ 9 $ 6 $ 15
Duke Energy Ohio | FTRs | RTO auction pricing        
Fair Value Measurement Inputs and Valuation Techniques        
Net derivative asset (liability) | $ $ 1 $ 1    
Duke Energy Ohio | FTRs | RTO auction pricing | Minimum        
Fair Value Measurement Inputs and Valuation Techniques        
Input measurements (in usd per MWh and usd per MMBtu) 0.36      
Duke Energy Ohio | FTRs | RTO auction pricing | Maximum        
Fair Value Measurement Inputs and Valuation Techniques        
Input measurements (in usd per MWh and usd per MMBtu) 1.42 1.13    
Duke Energy Ohio | FTRs | RTO auction pricing | Weighted Average        
Fair Value Measurement Inputs and Valuation Techniques        
Input measurements (in usd per MWh and usd per MMBtu) 0.70 0.48    
Duke Energy Indiana        
Fair Value Measurement Inputs and Valuation Techniques        
Net derivative asset (liability) | $ $ 2 $ 8 $ 5 $ 13
Duke Energy Indiana | FTRs | RTO auction pricing        
Fair Value Measurement Inputs and Valuation Techniques        
Net derivative asset (liability) | $ $ 2 $ 8    
Duke Energy Indiana | FTRs | RTO auction pricing | Minimum        
Fair Value Measurement Inputs and Valuation Techniques        
Input measurements (in usd per MWh and usd per MMBtu) (0.48) (0.63)    
Duke Energy Indiana | FTRs | RTO auction pricing | Maximum        
Fair Value Measurement Inputs and Valuation Techniques        
Input measurements (in usd per MWh and usd per MMBtu) 7.53 9.24    
Duke Energy Indiana | FTRs | RTO auction pricing | Weighted Average        
Fair Value Measurement Inputs and Valuation Techniques        
Input measurements (in usd per MWh and usd per MMBtu) 0.63 0.94    
v3.25.1
Fair Value Measurements (Other Fair Value Disclosure) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt $ 83,880 $ 80,689
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 76,709 73,440
Piedmont Natural Gas and Progress Energy    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Unamortized debt discount (premium), net 1,000 1,000
Duke Energy Carolinas | Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 18,234 17,490
Duke Energy Carolinas | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 16,740 15,975
Progress Energy | Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 26,883 24,496
Progress Energy | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 24,925 22,548
Duke Energy Progress | Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 14,220 12,504
Duke Energy Progress | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 12,716 11,009
Duke Energy Florida | Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 11,018 10,348
Duke Energy Florida | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 10,423 9,752
Duke Energy Ohio | Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 4,166 4,165
Duke Energy Ohio | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 3,871 3,871
Duke Energy Indiana | Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 4,798 4,798
Duke Energy Indiana | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 4,329 4,329
Piedmont | Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 4,004 4,003
Piedmont | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt $ 3,642 $ 3,584
v3.25.1
Variable Interest Entities (Narrative) (Details) - VIE primary beneficiary - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2025
Jan. 31, 2025
Apr. 30, 2024
Mar. 31, 2024
Mar. 31, 2025
Jun. 30, 2024
Dec. 31, 2024
Apr. 01, 2024
Feb. 29, 2024
Variable Interest Entities [Line Items]                  
Variable interest entity, financial or other support, amount         $ 0 $ 0      
Duke Energy Florida | DEFR Accounts Receivable Securitization Facility Maturing April 2024 | Secured Debt                  
Variable Interest Entities [Line Items]                  
Repayments of debt     $ 325,000,000            
Duke Energy Carolinas | DEFR Accounts Receivable Securitization Facility Maturing April 2024 | Secured Debt                  
Variable Interest Entities [Line Items]                  
Repayments of debt   $ 500,000,000              
Duke Energy Progress | DEFR Accounts Receivable Securitization Facility Maturing April 2024 | Secured Debt                  
Variable Interest Entities [Line Items]                  
Repayments of debt $ 400,000,000                
CRC                  
Variable Interest Entities [Line Items]                  
Repayments of debt       $ 350,000,000          
Accounts receivable from securitization                 $ 682,000,000
CRC | Duke Energy Indiana                  
Variable Interest Entities [Line Items]                  
Accounts receivable from securitization                 316,000,000
CRC | Duke Energy Ohio                  
Variable Interest Entities [Line Items]                  
Accounts receivable from securitization                 $ 366,000,000
DEFR | Duke Energy Florida                  
Variable Interest Entities [Line Items]                  
Accounts receivable from securitization               $ 459,000,000  
DEFR | Duke Energy Carolinas                  
Variable Interest Entities [Line Items]                  
Accounts receivable from securitization   $ 1,081,000,000              
DEPSCSF | Duke Energy Progress                  
Variable Interest Entities [Line Items]                  
Proceeds from issuance of senior secured bonds     $ 177,000,000            
DEPR | Duke Energy Progress                  
Variable Interest Entities [Line Items]                  
Accounts receivable from securitization 0       0   $ 835,000,000    
DEPR | Duke Energy (Parent)                  
Variable Interest Entities [Line Items]                  
Accounts receivable from securitization $ 943,000,000       $ 943,000,000        
v3.25.1
Variable Interest Entities (Schedule of Accounts Receivable Securitizations) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Jan. 31, 2025
Dec. 31, 2024
Apr. 01, 2024
Feb. 29, 2024
Variable Interest Entities [Line Items]          
Long-Term Debt $ 79,700   $ 76,340    
Duke Energy Carolinas          
Variable Interest Entities [Line Items]          
Long-Term Debt 17,911   16,669    
Duke Energy Progress          
Variable Interest Entities [Line Items]          
Long-Term Debt 13,489   11,371    
Duke Energy Florida          
Variable Interest Entities [Line Items]          
Long-Term Debt 9,783   9,814    
CRC | VIE primary beneficiary          
Variable Interest Entities [Line Items]          
Accounts receivable from securitization         $ 682
DERF | Duke Energy Carolinas | VIE primary beneficiary          
Variable Interest Entities [Line Items]          
Long-Term Debt 0   500    
Accounts receivable from securitization 0   1,054    
DEPR | Duke Energy Progress | VIE primary beneficiary          
Variable Interest Entities [Line Items]          
Long-Term Debt 0   400    
Accounts receivable from securitization $ 0   $ 835    
DEFR | Duke Energy Carolinas | VIE primary beneficiary          
Variable Interest Entities [Line Items]          
Accounts receivable from securitization   $ 1,081      
DEFR | Duke Energy Florida | VIE primary beneficiary          
Variable Interest Entities [Line Items]          
Accounts receivable from securitization       $ 459  
v3.25.1
Variable Interest Entities (Schedule of Consolidated VIEs) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Variable Interest Entities [Line Items]    
Regulatory Assets: Current $ 2,538 $ 2,756
Current Assets: Other 780 695
Other Noncurrent Assets: Regulatory assets 14,200 14,254
Other 3,502 3,509
Current Liabilities: Other 1,861 2,084
Current maturities of long-term debt 4,180 4,349
Long-Term Debt 79,700 76,340
Inventory 4,418 4,509
Accounts payable 4,442 5,479
Duke Energy Carolinas    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 613 685
Current Assets: Other 169 52
Other Noncurrent Assets: Regulatory assets 4,149 4,199
Other 1,141 1,127
Current Liabilities: Other 485 541
Current maturities of long-term debt 23 521
Long-Term Debt 17,911 16,669
Inventory 1,488 1,536
Accounts payable 1,378 1,809
Duke Energy Progress    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 616 626
Current Assets: Other 151 104
Other Noncurrent Assets: Regulatory assets 4,573 4,555
Other 752 724
Current Liabilities: Other 359 427
Current maturities of long-term debt 581 983
Long-Term Debt 13,489 11,371
Inventory 1,333 1,341
Accounts payable 603 749
Duke Energy Florida    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 921 1,022
Current Assets: Other 56 227
Other Noncurrent Assets: Regulatory assets 2,068 2,064
Other 479 465
Current Liabilities: Other 336 342
Current maturities of long-term debt 1,235 534
Long-Term Debt 9,783 9,814
Inventory 773 745
Accounts payable 1,087 1,418
DECNCSF | Duke Energy Carolinas | VIE primary beneficiary    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 12 12
Current Assets: Other 6 9
Other Noncurrent Assets: Regulatory assets 186 189
Other 1 1
Current Liabilities: Other 1 2
Current maturities of long-term debt 10 10
Long-Term Debt 193 198
DEPNCSF | Duke Energy Progress | VIE primary beneficiary    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 39 39
Current Assets: Other 17 27
Other Noncurrent Assets: Regulatory assets 608 620
Other 4 4
Current Liabilities: Other   10
Current maturities of long-term debt 35 34
Long-Term Debt 629 646
DEPSCSF | Duke Energy Progress | VIE primary beneficiary    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 8 8
Current Assets: Other 6 13
Other Noncurrent Assets: Regulatory assets 151 155
Other 1 1
Current Liabilities: Other   7
Current maturities of long-term debt 5 9
Long-Term Debt 160 163
DEFPF | Duke Energy Florida | VIE primary beneficiary    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 61 61
Current Assets: Other 10 35
Other Noncurrent Assets: Regulatory assets 729 741
Other 7  
Current Liabilities: Other 2 8
Current maturities of long-term debt 60 59
Long-Term Debt 741 773
DEF ProCo | Duke Energy Florida | VIE primary beneficiary    
Variable Interest Entities [Line Items]    
Inventory 509 494
Accounts payable $ 201 $ 208
v3.25.1
Variable Interest Entities (Sales and Cash Flows) (Details) - VIE not primary beneficiary - CRC
$ in Millions
 3 Months Ended
Mar. 31, 2024
USD ($)
Duke Energy Ohio  
Sales  
Receivables sold $ 474
Loss recognized on sale 7
Cash flows  
Cash proceeds from receivables sold 478
Return received on retained interests 4
Duke Energy Indiana  
Sales  
Receivables sold 473
Loss recognized on sale 6
Cash flows  
Cash proceeds from receivables sold 523
Return received on retained interests $ 4
v3.25.1
Revenue (Remaining Performance Obligations) (Details)
$ in Millions
Mar. 31, 2025
USD ($)
Duke Energy Carolinas  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, amount $ 45
Duke Energy Carolinas | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 9 months
Revenue, remaining performance obligation, amount $ 9
Duke Energy Carolinas | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 12
Duke Energy Carolinas | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 12
Duke Energy Carolinas | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 12
Duke Energy Carolinas | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 0
Duke Energy Carolinas | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount $ 0
Progress Energy  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, amount $ 145
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 9 months
Revenue, remaining performance obligation, amount $ 21
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 43
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 13
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 13
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 13
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount $ 42
Duke Energy Progress  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, amount $ 48
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 9 months
Revenue, remaining performance obligation, amount $ 4
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 6
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 6
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 6
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 6
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount $ 20
Duke Energy Florida  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, amount $ 97
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 9 months
Revenue, remaining performance obligation, amount $ 17
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 37
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 7
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 7
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 7
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount $ 22
Duke Energy Indiana  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, amount $ 50
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 9 months
Revenue, remaining performance obligation, amount $ 13
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 17
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 15
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 5
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 0
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount $ 0
Piedmont  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, amount $ 389
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 9 months
Revenue, remaining performance obligation, amount $ 48
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 51
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 49
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 46
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, remaining performance obligation, amount $ 44
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount $ 151
v3.25.1
Revenue (Disaggregation of Revenue) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers $ 8,218 $ 7,532
Revenue from sources other than contracts with customers 31 139
Total operating revenues 8,249 7,671
Electric Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 7,053 6,678
Total operating revenues 7,125 6,785
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 3,403 3,115
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 1,921 1,934
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 823 822
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 670 554
Electric Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 236 253
Gas Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 1,157 847
Total operating revenues 1,116 879
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 706 520
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 322 240
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 55 47
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Gas Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 74 40
Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 8  
Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers   7
Duke Energy Carolinas    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 2,491 2,352
Revenue from sources other than contracts with customers 33 55
Total operating revenues 2,524 2,407
Duke Energy Carolinas | Electric Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 2,491 2,352
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 1,127 1,058
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 701 717
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 334 340
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 149 138
Duke Energy Carolinas | Electric Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 180 99
Duke Energy Carolinas | Gas Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Carolinas | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Carolinas | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Carolinas | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Carolinas | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Carolinas | Gas Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Carolinas | Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0  
Duke Energy Carolinas | Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers   0
Progress Energy    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 3,408 3,153
Revenue from sources other than contracts with customers 59 75
Total operating revenues 3,467 3,228
Progress Energy | Electric Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 3,408 3,153
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 1,614 1,517
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 845 866
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 267 266
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 443 355
Progress Energy | Electric Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 239 149
Progress Energy | Gas Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Progress Energy | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Progress Energy | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Progress Energy | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Progress Energy | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Progress Energy | Gas Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Progress Energy | Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0  
Progress Energy | Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers   0
Duke Energy Progress    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 1,995 1,745
Revenue from sources other than contracts with customers 23 43
Total operating revenues 2,018 1,788
Duke Energy Progress | Electric Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 1,995 1,745
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 820 742
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 415 422
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 193 177
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 404 326
Duke Energy Progress | Electric Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 163 78
Duke Energy Progress | Gas Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Progress | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Progress | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Progress | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Progress | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Progress | Gas Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Progress | Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0  
Duke Energy Progress | Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers   0
Duke Energy Florida    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 1,413 1,408
Revenue from sources other than contracts with customers 31 28
Total operating revenues 1,444 1,436
Duke Energy Florida | Electric Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 1,413 1,408
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 794 775
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 430 444
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 74 89
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 39 29
Duke Energy Florida | Electric Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 76 71
Duke Energy Florida | Gas Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Florida | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Florida | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Florida | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Florida | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Florida | Gas Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Florida | Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0  
Duke Energy Florida | Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers   0
Duke Energy Ohio    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 775 693
Revenue from sources other than contracts with customers (9) (15)
Total operating revenues 766 678
Duke Energy Ohio | Electric Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 497 473
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 282 253
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 142 152
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 33 32
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 22 14
Duke Energy Ohio | Electric Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 18 22
Duke Energy Ohio | Gas Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 278 220
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 186 147
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 70 57
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 16 11
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Ohio | Gas Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 6 5
Duke Energy Ohio | Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0  
Duke Energy Ohio | Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers   0
Duke Energy Indiana    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 855 753
Revenue from sources other than contracts with customers 3 6
Total operating revenues 858 759
Duke Energy Indiana | Electric Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 855 753
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 379 287
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 233 201
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 187 183
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 57 48
Duke Energy Indiana | Electric Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers (1) 34
Duke Energy Indiana | Gas Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Indiana | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Indiana | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Indiana | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Indiana | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Indiana | Gas Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Duke Energy Indiana | Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0  
Duke Energy Indiana | Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers   0
Piedmont    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 888 637
Revenue from sources other than contracts with customers (31) 39
Total operating revenues 857 676
Piedmont | Electric Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Piedmont | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Piedmont | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Piedmont | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Piedmont | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Piedmont | Electric Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 0 0
Piedmont | Gas Utilities and Infrastructure    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 888 637
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 520 373
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 252 183
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 39 38
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 24 8
Piedmont | Gas Utilities and Infrastructure | Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 53 35
Piedmont | Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers $ 0  
Piedmont | Other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers   $ 0
v3.25.1
Revenue (Reserve for Credit Losses for Trade and Other Receivables) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning balance $ 209 $ 205
Write-Offs (29) (32)
Credit Loss Expense 14 10
Other Adjustments 10 21
Ending balance 204 204
Duke Energy Carolinas    
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning balance 69 56
Write-Offs (14) (12)
Credit Loss Expense 5 7
Other Adjustments 4 11
Ending balance 64 62
Progress Energy    
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning balance 73 74
Write-Offs (15) (16)
Credit Loss Expense 8 9
Other Adjustments 1 6
Ending balance 67 73
Duke Energy Progress    
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning balance 44 44
Write-Offs (8) (7)
Credit Loss Expense 5 4
Other Adjustments 1 6
Ending balance 42 47
Duke Energy Florida    
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning balance 29 31
Write-Offs (7) (9)
Credit Loss Expense 3 5
Other Adjustments 0 0
Ending balance 25 27
Duke Energy Ohio    
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning balance 43 9
Write-Offs 0 0
Credit Loss Expense 1 1
Other Adjustments 2 31
Ending balance 46 41
Duke Energy Indiana    
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning balance 15 5
Write-Offs 0 0
Credit Loss Expense 0 2
Other Adjustments 2 9
Ending balance 17 16
Piedmont    
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning balance 10 11
Write-Offs 0 (1)
Credit Loss Expense 0 2
Other Adjustments 0 0
Ending balance $ 10 $ 12
v3.25.1
Stockholders' Equity (Earnings Per Share Data) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Class of Stock [Line Items]    
Net Income Available to Duke Energy Corporation Common Stockholders $ 1,365 $ 1,099
Loss From Discontinued Operations, net of tax   (3)
Accumulated preferred stock dividends adjustment 0 12
Less: Impact of participating securities 1 2
Income from continuing operations available to Duke Energy common stockholders 1,364 1,112
Loss from discontinued operations, net of tax 0 $ (3)
Add: Net (income) loss attributable to noncontrolling interest included in discontinued operations $ 0  
Weighted average common shares outstanding – basic (in shares) 777 771
Weighted average common shares outstanding – diluted (in shares) 777 771
Basic (in usd per share) $ 1.76 $ 1.44
Diluted (in usd per share) $ 1.76 $ 1.44
EPS from continuing operations available to Duke Energy common stockholders    
Potentially dilutive items excluded from the calculation (in shares) 2 2
Dividends declared per common share (in usd per share) $ 1.045 $ 1.025
Preferred stock, Series A    
EPS from continuing operations available to Duke Energy common stockholders    
Dividends declared on preferred stock per depositary share (in usd per share) $ 0.359 0.359
Cumulative dividend rate per annum 5.75%  
Liquidation preference per share (in usd per share) $ 25  
Preferred stock, Series B    
EPS from continuing operations available to Duke Energy common stockholders    
Dividends declared on preferred stock per depositary share (in usd per share)   $ 24.375
Cumulative dividend rate per annum 4.875%  
v3.25.1
Stockholders' Equity - Narrative (Details)
$ in Billions
 1 Months Ended
Nov. 30, 2022
USD ($)
Class of Stock [Line Items]  
Maximum value of shares to be issued under ATM program $ 1.5
v3.25.1
Stockholders' Equity - Equity Issuances Pursuant to Forward Contracts (Details) - If net share settlement was elected
 3 Months Ended
Mar. 31, 2025
$ / shares
shares
Forward Contract Indexed to Issuer's Equity [Line Items]  
Shares Priced (shares) 4,238,007
Equity Forwards, First Tranche  
Forward Contract Indexed to Issuer's Equity [Line Items]  
Shares Priced (shares) 1,710,979
Forward contract indexed to issuer's equity, forward rate per share (in dollars per share) | $ / shares $ 116.02
Equity Forwards, Second Tranche  
Forward Contract Indexed to Issuer's Equity [Line Items]  
Shares Priced (shares) 1,262,618
Forward contract indexed to issuer's equity, forward rate per share (in dollars per share) | $ / shares $ 117.94
Equity Forwards, Third Tranche  
Forward Contract Indexed to Issuer's Equity [Line Items]  
Shares Priced (shares) 1,264,410
Forward contract indexed to issuer's equity, forward rate per share (in dollars per share) | $ / shares $ 117.79
v3.25.1
Employee Benefit Plans (Components of Net Periodic Pension Costs) (Details) - Qualified Pension Plans - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]    
Service cost $ 27 $ 28
Interest cost on projected benefit obligation 82 82
Expected return on plan assets (149) (154)
Amortization of actuarial loss 15 8
Amortization of prior service credit (3) (3)
Amortization of settlement charges 6 5
Net periodic pension costs (22) (34)
Duke Energy Carolinas    
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]    
Service cost 9 9
Interest cost on projected benefit obligation 19 20
Expected return on plan assets (38) (41)
Amortization of actuarial loss 4 2
Amortization of prior service credit 0 0
Amortization of settlement charges 3 2
Net periodic pension costs (3) (8)
Progress Energy    
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]    
Service cost 7 8
Interest cost on projected benefit obligation 26 26
Expected return on plan assets (55) (54)
Amortization of actuarial loss 5 2
Amortization of prior service credit 0 0
Amortization of settlement charges 2 1
Net periodic pension costs (15) (17)
Duke Energy Progress    
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]    
Service cost 5 5
Interest cost on projected benefit obligation 11 12
Expected return on plan assets (24) (25)
Amortization of actuarial loss 2 1
Amortization of prior service credit 0 0
Amortization of settlement charges 1 1
Net periodic pension costs (5) (6)
Duke Energy Florida    
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]    
Service cost 3 3
Interest cost on projected benefit obligation 14 14
Expected return on plan assets (30) (29)
Amortization of actuarial loss 2 1
Amortization of prior service credit 0 0
Amortization of settlement charges 1 0
Net periodic pension costs (10) (11)
Duke Energy Ohio    
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]    
Service cost 0 1
Interest cost on projected benefit obligation 4 4
Expected return on plan assets (5) (6)
Amortization of actuarial loss 1 0
Amortization of prior service credit 0 0
Amortization of settlement charges 0 0
Net periodic pension costs 0 (1)
Duke Energy Indiana    
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]    
Service cost 1 2
Interest cost on projected benefit obligation 7 6
Expected return on plan assets (10) (10)
Amortization of actuarial loss 1 1
Amortization of prior service credit 0 0
Amortization of settlement charges 0 0
Net periodic pension costs (1) (1)
Piedmont    
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]    
Service cost 1 1
Interest cost on projected benefit obligation 3 2
Expected return on plan assets (5) (5)
Amortization of actuarial loss 1 1
Amortization of prior service credit (2) (2)
Amortization of settlement charges 1 1
Net periodic pension costs $ (1) $ (2)
v3.25.1
Income Taxes (Narrative) (Details) - Subsequent event
$ in Millions
 1 Months Ended
Apr. 30, 2025
USD ($)
Tax Credit Carryforward [Line Items]  
Tax credits $ 643
Duke Energy Carolinas | Sale of Nuclear Power PTCs  
Tax Credit Carryforward [Line Items]  
Decrease in deferred tax asset 478
Duke Energy Progress | Sale of Nuclear Power PTCs  
Tax Credit Carryforward [Line Items]  
Decrease in deferred tax asset 69
Duke Energy Florida | Sale of Nuclear Power PTCs  
Tax Credit Carryforward [Line Items]  
Decrease in deferred tax asset $ 58
v3.25.1
Income Taxes (Effective Tax Rates) (Details)
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 12.10% 13.40%
Duke Energy Carolinas    
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 9.00% 11.50%
Progress Energy    
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 16.80% 16.50%
Duke Energy Progress    
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 14.50% 15.00%
Duke Energy Florida    
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 19.90% 19.40%
Duke Energy Ohio    
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 18.00% 16.80%
Duke Energy Indiana    
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 12.50% 17.30%
Piedmont    
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 20.70% 19.60%