CNA FINANCIAL CORP, 10-K filed on 2/7/2023
Annual Report
v3.22.4
Cover Page - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Feb. 03, 2023
Jun. 30, 2022
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2022    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 1-5823    
Entity Registrant Name CNA FINANCIAL CORPORATION    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 36-6169860    
Entity Address, Address Line One 151 N. Franklin    
Entity Address, Postal Zip Code 60606    
Entity Address, City or Town Chicago,    
Entity Address, State or Province IL    
City Area Code 312    
Local Phone Number 822-5000    
Title of 12(b) Security Common Stock, Par value $2.50    
Trading Symbol "CNA"    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
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    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding (in shares)   270,901,829  
Entity Public Float     $ 1,239
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the CNA Financial Corporation Proxy Statement prepared for the 2023 annual meeting of shareholders, pursuant to Regulation 14A, are incorporated by reference into Part III of this report.
   
Entity Central Index Key 0000021175    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Amendment Flag false    
New York Stock Exchange      
Entity Information [Line Items]      
Security Exchange Name NYSE    
Chicago Stock Exchange      
Entity Information [Line Items]      
Security Exchange Name CHX    
v3.22.4
Audit Information
12 Months Ended
Dec. 31, 2022
Audit Information [Abstract]  
Auditor Name DELOITTE & TOUCHE LLP
Auditor Location Chicago, Illinois
Auditor Firm ID 34
v3.22.4
Consolidated Statements of Operations - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Revenues      
Net earned premiums $ 8,667 $ 8,175 $ 7,649
Net investment income 1,805 2,159 1,935
Net investment (losses) gains (199) 120 (54)
Non-insurance warranty revenue 1,574 1,430 1,252
Other revenues 32 24 26
Total revenues 11,879 11,908 10,808
Claims, Benefits and Expenses      
Insurance claims and policyholders’ benefits 6,386 6,349 6,170
Amortization of deferred acquisition costs 1,490 1,443 1,410
Non-insurance warranty expense 1,471 1,328 1,159
Other operating expenses 1,339 1,191 1,126
Interest 112 113 122
Total claims, benefits and expenses 10,798 10,424 9,987
Income before income tax 1,081 1,484 821
Income tax expense (187) (282) (131)
Net income $ 894 $ 1,202 $ 690
Basic earnings per share      
Basic earnings per share (in usd per share) $ 3.29 $ 4.42 $ 2.54
Diluted earnings per share      
Diluted earnings per share (in usd per share) $ 3.28 $ 4.41 $ 2.53
Weighted Average Outstanding Common Stock and Common Stock Equivalents      
Basic (in shares) 271.6 271.8 271.6
Diluted (in shares) 272.5 272.8 272.4
v3.22.4
Consolidated Statements of Comprehensive (Loss) Income - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Net income $ 894 $ 1,202 $ 690
Other Comprehensive (Loss) Income, net of tax      
Net unrealized gains and losses on investments (3,782) (708) 720
Foreign currency translation adjustment (108) (19) 47
Pension and postretirement benefits 13 244 (15)
Other comprehensive (loss) income, net of tax (3,877) (483) 752
Total comprehensive (loss) income (2,983) 719 1,442
Investments      
Other Comprehensive (Loss) Income, net of tax      
Net unrealized gains and losses on investments (5) (2) 0
Net unrealized gains and losses on other investments      
Other Comprehensive (Loss) Income, net of tax      
Net unrealized gains and losses on investments $ (3,777) $ (706) $ 720
v3.22.4
Consolidated Balance Sheets - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Investments:    
Fixed maturity securities at fair value (amortized cost of $41,032 and $39,952, less allowance for credit loss of $1 and $18) $ 37,627 $ 44,380
Equity securities at fair value (cost of $703 and $964) 674 1,035
Limited partnership investments 1,926 1,859
Other invested assets 78 91
Mortgage loans (less allowance for uncollectible receivables of $24 and $16) 1,040 973
Short term investments 1,832 1,990
Total investments 43,177 50,328
Cash 475 536
Reinsurance receivables (less allowance for uncollectible receivables of $22 and $21) 5,416 5,463
Insurance receivables (less allowance for uncollectible receivables of $29 and $29) 3,158 2,945
Accrued investment income 402 377
Deferred acquisition costs 806 737
Deferred income taxes 1,178 142
Property and equipment at cost (less accumulated depreciation of $280 and $255) 226 226
Goodwill 144 148
Deferred non-insurance warranty acquisition expense 3,671 3,476
Other assets (includes $18 and $ - due from Loews Corporation) 2,274 2,261
Total assets 60,927 66,639
Insurance reserves:    
Claim and claim adjustment expenses 25,099 24,174
Unearned premiums 6,374 5,761
Future policy benefits 10,151 13,236
Short term debt 243 0
Long term debt 2,538 2,779
Deferred non-insurance warranty revenue 4,714 4,503
Other liabilities (includes $26 and $56 due to Loews Corporation) 2,983 3,377
Total liabilities 52,102 53,830
Commitments and contingencies (Notes B and F)  
Stockholders' Equity    
Common stock ($2.50 par value; 500,000,000 shares authorized; 273,040,243 shares issued; 270,895,902 and 271,363,999 shares outstanding) 683 683
Additional paid-in capital 2,220 2,215
Retained earnings 9,572 9,663
Accumulated other comprehensive (loss) income (3,557) 320
Treasury stock (2,144,341 and 1,676,244 shares), at cost (93) (72)
Total stockholders’ equity 8,825 12,809
Total liabilities and stockholders' equity $ 60,927 $ 66,639
v3.22.4
Consolidated Balance Sheets - (Parenthetical) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Statement of Financial Position [Abstract]    
Fixed maturities securities at amortized cost $ 41,032 $ 39,952
Marketable securities fixed maturities allowance for credit loss 1 18
Equity securities at cost 703 964
Mortgage loans on real estate commercial and consumer allowance for credit loss 24 16
Allowance for uncollectible reinsurance 22 21
Allowance for uncollectible insurance receivables 29 29
Accumulated depreciation on property and equipment 280 255
Due to related parties $ 26 $ 56
Common stock, par value (in usd per share) $ 2.50 $ 2.50
Common stock, shares authorized (in shares) 500,000,000 500,000,000
Common stock, shares issued (in shares) 273,040,243 273,040,243
Common stock, shares outstanding (in shares) 270,895,902 271,363,999
Treasury stock, shares (in shares) 2,144,341 1,676,244
v3.22.4
Consolidated Statements of Cash Flows - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cash Flows from Operating Activities      
Net income $ 894 $ 1,202 $ 690
Adjustments to reconcile net income to net cash flows provided by operating activities:      
Deferred income tax (benefit) expense (34) 47 (49)
Trading portfolio activity 6 20 (5)
Net investment losses (gains) 199 (120) 54
Equity method investees 250 (127) (8)
Net amortization of investments (129) (81) (67)
Depreciation and amortization 51 54 60
Changes in:      
Receivables, net (226) (1,358) (409)
Accrued investment income (29) 3 16
Deferred acquisition costs (79) (30) (43)
Insurance reserves 1,791 2,463 1,681
Other, net (192) (76) (145)
Net cash flows provided by operating activities 2,502 1,997 1,775
Dispositions:      
Fixed maturity securities - sales 5,909 3,816 5,904
Fixed maturity securities - maturities, calls and redemptions 2,358 4,464 3,760
Equity securities 509 316 355
Limited partnerships 138 246 373
Mortgage loans 125 190 74
Purchases:      
Fixed maturity securities (9,821) (9,307) (10,269)
Equity securities (294) (304) (452)
Limited partnerships (337) (440) (224)
Mortgage loans (200) (95) (172)
Change in other investments 8 (6) (8)
Change in short term investments 155 (83) (39)
Purchases of property and equipment (52) (26) (23)
Other, net (10) 1 16
Net cash flows used by investing activities (1,512) (1,228) (705)
Cash Flows from Financing Activities      
Dividends paid to common stockholders (982) (621) (950)
Proceeds from the issuance of debt 0 0 495
Repayment of debt 0 0 (419)
Purchase of treasury stock (39) (18) (18)
Other, net (11) (9) (10)
Net cash flows used by financing activities (1,032) (648) (902)
Effect of foreign exchange rate changes on cash (19) (4) 9
Net change in cash (61) 117 177
Cash, beginning of year 536 419 242
Cash, end of period $ 475 $ 536 $ 419
v3.22.4
Consolidated Statements of Stockholders' Equity - USD ($)
$ in Millions
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Retained Earnings
Cumulative effect adjustments from changes in accounting guidance, net of tax
Retained Earnings
Balance, beginning of year, as adjusted
Accumulated Other Comprehensive (Loss) Income
Treasury Stock
Total stockholder's equity at beginning of period at Dec. 31, 2019   $ 683 $ 2,203 $ 9,348 $ (5) $ 9,343 $ 51 $ (70)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Stock-based compensation     8         17
Dividends to common stockholders ($3.60, $2.27, and $3.48 per share)       (952)        
Net income $ 690     690        
Other comprehensive (loss) income 752           752  
Purchase of treasury stock               (18)
Total stockholder's equity at end of period at Dec. 31, 2020 12,707 683 2,211 9,081   9,081 803 (71)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Stock-based compensation     4         17
Dividends to common stockholders ($3.60, $2.27, and $3.48 per share)       (620)        
Net income 1,202     1,202        
Other comprehensive (loss) income (483)           (483)  
Purchase of treasury stock               (18)
Total stockholder's equity at end of period at Dec. 31, 2021 12,809 683 2,215 9,663   $ 9,663 320 (72)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Stock-based compensation     5         18
Dividends to common stockholders ($3.60, $2.27, and $3.48 per share)       (985)        
Net income 894     894        
Other comprehensive (loss) income (3,877)           (3,877)  
Purchase of treasury stock               (39)
Total stockholder's equity at end of period at Dec. 31, 2022 $ 8,825 $ 683 $ 2,220 $ 9,572     $ (3,557) $ (93)
v3.22.4
Consolidated Statements of Stockholders' Equity - (Parenthetical) - $ / shares
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]      
Dividends declared per share (usd per share) $ 3.60 $ 2.27 $ 3.48
v3.22.4
Summary of Significant Accounting Policies
12 Months Ended
Dec. 31, 2022
Accounting Policies [Abstract]  
Summary of Significant Accounting Policies Summary of Significant Accounting Policies
Basis of Presentation
The Consolidated Financial Statements include the accounts of CNA Financial Corporation (CNAF) and its subsidiaries. Collectively, CNAF and its subsidiaries are referred to as CNA or the Company. Loews Corporation (Loews) owned approximately 90% of the outstanding common stock of CNAF as of December 31, 2022.
The accompanying Consolidated Financial Statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP). Intercompany amounts have been eliminated. The preparation of Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the Consolidated Financial Statements and the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates.
Accounting Standards Updates (ASU) Pending Adoption
In August 2018, the FASB issued ASU 2018-12, Financial Services-Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts. The updated accounting guidance requires changes to the measurement and disclosure of long-duration contracts. For the Company, this includes the long term care business. Entities will be required to review, and update if there is a change, cash flow assumptions (including morbidity and persistency) at least annually, and to update discount rate assumptions quarterly using an upper-medium grade fixed-income instrument yield. The effect of changes in cash flow assumptions will be recorded in the Company's results of operations and the effect of changes in discount rate assumptions will be recorded in Other comprehensive income. The guidance is effective for interim and annual periods beginning after December 15, 2022, with early adoption permitted, and may be applied using either a modified retrospective transition method or a full retrospective transition method. Financial statements for prior periods presented shall be adjusted to reflect the effects of applying the new accounting guidance.
The Company will adopt the new guidance effective January 1, 2023, using the modified retrospective method applied as of the transition date of January 1, 2021. The Company will use a published spot rate curve constructed from A+, A and A- rated U.S. dollar denominated corporate bonds matched to the duration of the corresponding insurance liabilities, to calculate discount rates. The Company will group its long-duration contracts into calendar year cohorts based on the contract issue date.
The most significant impact at the transition date will be the effect of updating the discount rate assumption to reflect an upper-medium grade fixed-income instrument yield, which will be partially offset by the de-recognition of Shadow Adjustments associated with long-duration contracts. The Company expects the net impact of these changes will be a decrease of approximately $2.3 billion in Accumulated other comprehensive income (AOCI) as of the transition date of January 1, 2021. There is a minimal transition impact expected to retained earnings.
The requirement to review, and update if there is a change, cash flow assumptions at least annually is expected to change the pattern of earnings being recognized. Adoption will also significantly expand the Company’s disclosures, and will impact systems, processes, and controls. While the requirements of the new guidance represent a material change from existing GAAP, the new guidance will not impact capital and surplus under statutory accounting practices, cash flows, or the underlying economics of the business.
In December 2022, the FASB issued ASU 2022-05, Financial Services-Insurance (Topic 944): Transition for Sold Contracts. This guidance permits companies to make an election to exclude from the scope of ASU 2018-12 any insurance contracts that have been de-recognized prior to the effective date of ASU 2018-12, assuming that the company has no significant continuing involvement with the de-recognized contracts. In the fourth quarter of 2022, the Company novated its block of legacy annuity business, which was fully-ceded prior
to novation. The Company plans to elect the ASU 2022-05 transition relief, and will exclude the novated legacy annuity business from the scope of ASU 2018-12.
The Company continues to make progress on its implementation activities and is in the process of reviewing restated results, and finalizing updates to internal controls associated with adoption of the new guidance.
Insurance Operations
Premiums: Insurance premiums on property and casualty insurance contracts are recognized in proportion to the underlying risk insured and are principally earned ratably over the term of the policies. Premiums on long term care contracts are earned ratably over the policy year in which they are due. The reserve for unearned premiums represents the portion of premiums written relating to the unexpired terms of coverage.
Property and casualty contracts that are retrospectively rated or subject to audit premiums contain provisions that result in an adjustment to the initial policy premium depending on the contract provisions. These provisions stipulate the adjustment due to loss experience of the insured during the coverage period, or changes in the level of exposure to insurance risk. For such contracts, the Company estimates the amount of ultimate premiums that the Company may earn upon completion of the coverage period and recognizes either an asset or a liability for the difference between the initial policy premium and the estimated ultimate premium. The Company either adjusts such estimated ultimate premium amounts during the course of the coverage period based on actual results to date, or by conducting premium audits after the policy has expired to determine the final exposure to insured risks. The resulting adjustment is recorded as either a reduction of or an increase to the earned premiums for the period.
Insurance receivables include balances due currently or in the future, including amounts due from insureds related to paid losses under high deductible policies, and are presented at unpaid balances, net of an allowance for uncollectible receivables. A loss rate methodology is used to determine expected credit losses for premium receivables. This methodology uses the Company’s historical annual credit losses relative to gross premium written to develop a range of credit loss rates for each dollar of gross written premium underwritten. Additionally, an expected credit loss for amounts due from insureds under high deductible and retrospectively rated policies is calculated on a pool basis, informed by historical default rate data obtained from major rating agencies. Changes in the allowance are presented as a component of Other operating expenses on the Consolidated Statements of Operations. Amounts are considered past due based on policy payment terms. Insurance receivables and any related allowance are written off after collection efforts are exhausted or a negotiated settlement is reached. See the Credit Losses section of this note for additional information on the Company’s allowances for expected credit losses.
Claim and claim adjustment expense reserves: Claim and claim adjustment expense reserves, except reserves for structured settlements not associated with asbestos and environmental pollution (A&EP), workers' compensation lifetime claims and long term care claims, are not discounted and are based on i) case basis estimates for losses reported on direct business, adjusted in the aggregate for ultimate loss expectations; ii) estimates of incurred but not reported (IBNR) losses; iii) estimates of losses on assumed reinsurance; iv) estimates of future expenses to be incurred in the settlement of claims; v) estimates of salvage and subrogation recoveries and vi) estimates of amounts due from insureds related to losses under high deductible policies. Management considers current conditions and trends as well as past Company and industry experience in establishing these estimates. The effects of inflation, which can be significant, are implicitly considered in the reserving process and are part of the recorded reserve balance. Ceded claim and claim adjustment expense reserves are reported as a component of Reinsurance receivables on the Consolidated Balance Sheets.
Claim and claim adjustment expense reserves are presented net of anticipated amounts due from insureds related to losses under deductible policies of $1.1 billion as of December 31, 2022 and 2021. A significant portion of these amounts are supported by collateral. The Company has an allowance for uncollectible deductible amounts, which is presented as a component of the allowance for doubtful accounts included in Insurance receivables on the Consolidated Balance Sheets.
Structured settlements have been negotiated for certain property and casualty insurance claims. Structured settlements are agreements to provide fixed periodic payments to claimants. The Company's obligations for structured settlements not funded by annuities are included in claim and claim adjustment expense reserves and
are discounted at a weighted average interest rate of 6.4% as of December 31, 2022 and 2021. As of December 31, 2022 and 2021, the discounted reserves for unfunded structured settlements were $485 million and $503 million, net of discount of $590 million and $621 million. For the years ended December 31, 2022, 2021 and 2020, the amount of interest recognized on the discounted reserves of unfunded structured settlements was $36 million, $36 million and $35 million, respectively. This interest accretion is presented as a component of Insurance claims and policyholders’ benefits on the Consolidated Statements of Operations, but is excluded from the Company’s disclosure of prior year loss reserve development.
Workers' compensation lifetime claim reserves are calculated using mortality assumptions determined through statutory regulation and economic factors. As of December 31, 2022 and 2021, workers' compensation lifetime claim reserves are discounted at a 3.5% interest rate. As of December 31, 2022 and 2021, the discounted reserves for workers’ compensation lifetime claim reserves were $211 million and $228 million, net of discount of $93 million and $97 million. For the years ended December 31, 2022, 2021 and 2020, the amount of interest accretion recognized on the discounted reserves of workers’ compensation lifetime claim reserves was $9 million, $12 million and $15 million, respectively. This interest accretion is presented as a component of Insurance claims and policyholders' benefits on the Consolidated Statements of Operations, but is excluded from the Company's disclosure of prior year loss reserve development.
Long term care claim reserves for policyholders that are currently receiving benefits are calculated using mortality and morbidity assumptions based on Company and industry experience. These long term care claim reserves are discounted at a weighted average interest rate of 5.9% and 5.8% as of December 31, 2022 and 2021. As of December 31, 2022 and 2021, such discounted reserves totaled $2.8 billion and $2.7 billion, net of discount of $450 million and $428 million.
Future policy benefit reserves: Future policy benefit reserves represent the active life reserves related to the Company's long term care policies for policyholders that are not currently receiving benefits and are computed using the net level premium method, which incorporates actuarial assumptions as to morbidity, persistency, inclusive of mortality, discount rate, future premium rate adjustments and expenses. Expense assumptions primarily relate to claim adjudication. These assumptions are locked in over the life of the policy; however if a premium deficiency emerges, the assumptions are unlocked and the future policy benefit reserves are increased. The September 30, 2022 gross premium valuation (GPV) indicated that recorded reserves included a margin of approximately $125 million. Long term care active life reserves for policy holders not currently receiving benefits are discounted at a weighted average interest rate of 5.3% as of December 31, 2022 and 2021.
In circumstances where the cash flow projections supporting future policy benefit reserves are expected to result in profits being recognized in early future years followed by losses in later future years, the future policy benefit reserves are increased by an amount necessary to offset losses that are projected to be recognized in later future years. The Company has not recorded additional future policy benefit reserves for profits followed by losses.
Insurance-related assessments: Liabilities for insurance-related assessments are accrued when an assessment is probable, when it can be reasonably estimated and when the event obligating the entity to pay an imposed or probable assessment has occurred. Liabilities for insurance-related assessments are not discounted and are included as part of Other liabilities on the Consolidated Balance Sheets. As of December 31, 2022 and 2021, the liability balances were $74 million and $79 million.
Reinsurance: Reinsurance accounting allows for contractual cash flows to be reflected as premiums and losses. To qualify for reinsurance accounting, reinsurance agreements must include risk transfer. To meet risk transfer requirements, a reinsurance contract must include both insurance risk, consisting of underwriting and timing risk, and a reasonable possibility of a significant loss for the assuming entity.
Reinsurance receivables related to paid losses are presented at unpaid balances. Reinsurance receivables related to unpaid losses are estimated in a manner consistent with claim and claim adjustment expense reserves or future policy benefit reserves. Reinsurance receivables are reported net of an allowance for uncollectible amounts on the Consolidated Balance Sheets. The cost of reinsurance is primarily accounted for over the life of the underlying reinsured policies using assumptions consistent with those used to account for the underlying policies or over the reinsurance contract period. The ceding of insurance does not discharge the primary liability of the Company.
The Company has established an allowance for uncollectible reinsurance receivables which relates to both amounts already billed on ceded paid losses as well as ceded reserves that will be billed when losses are paid in the future. For assessing expected credit losses, the Company separates reinsurance receivables into two pools: voluntary reinsurance receivables and involuntary receivables related to mandatory pools. The Company has not recorded an allowance for involuntary pools as there is no perceived credit risk. The principal credit quality indicator used in the valuation of the allowance on voluntary reinsurance receivables is the financial strength rating of the reinsurer sourced from major rating agencies. If the reinsurer is unrated, an internal financial strength rating is assigned based on the Company’s historical loss experience and the Company’s assessment of reinsurance counterparty risk profile, which generally corresponds with a B rating. Reinsurer financial strength ratings are updated and reviewed on an annual basis or sooner if the Company becomes aware of significant changes related to a reinsurer. The allowance for uncollectible reinsurance receivables is estimated on the basis of periodic evaluations of balances due from reinsurers, reinsurer financial strength rating and solvency, industry experience and current and forecast economic conditions. Because billed receivables generally approximate 5% or less of total reinsurance receivables, the age of the reinsurance receivables related to paid losses is not a significant input into the allowance analysis. Changes in the allowance for uncollectible reinsurance receivables are presented as a component of Insurance claims and policyholders' benefits on the Consolidated Statements of Operations. See the Credit Losses section of this note for additional information on the Company's allowances for expected credit losses.
Amounts are considered past due based on the reinsurance contract terms. Reinsurance receivables related to paid losses and any related allowance are written off after collection efforts have been exhausted or a negotiated settlement is reached with the reinsurer. Reinsurance receivables from insolvent insurers related to paid losses are written off when the settlement due from the estate can be reasonably estimated. At the time reinsurance receivables related to paid losses are written off, any required adjustment to reinsurance receivables related to unpaid losses is recorded as a component of Insurance claims and policyholders' benefits on the Consolidated Statements of Operations.
A loss portfolio transfer is a retroactive reinsurance contract. If the cumulative claim and allocated claim adjustment expenses ceded under a loss portfolio transfer exceed the consideration paid, the resulting gain from such excess is deferred and amortized into earnings in future periods in proportion to actual recoveries under the loss portfolio transfer. In any period in which there is a revised estimate of claim and allocated claim adjustment expenses and the loss portfolio transfer is in a gain position, the deferred gain is recalculated as if the revised estimate was available at the inception date of the loss portfolio transfer and the change in the deferred gain is recognized in earnings.
Deferred acquisition costs: Deferrable acquisition costs include commissions, premium taxes and certain underwriting and policy issuance costs which are incremental direct costs of successful contract acquisitions. Acquisition costs related to property and casualty business are deferred and amortized ratably over the period the related premiums are earned. Deferred acquisition costs are presented net of ceding commissions and other ceded acquisition costs.
The Company evaluates deferred acquisition costs for recoverability. Anticipated investment income is considered in the determination of the recoverability of deferred acquisition costs. Adjustments, if necessary, are recorded in current period results of operations.
Policyholder dividends: Policyholder dividends are paid to participating policyholders within the workers' compensation and surety lines of business. Net written premiums for participating dividend policies were approximately 2%, 1% and 1% of total net written premiums for each of the years ended December 31, 2022, 2021 and 2020. Dividends to policyholders are accrued according to the Company's best estimate of the amount to be paid in accordance with contractual provisions and applicable state laws. Dividends to policyholders are presented as a component of Insurance claims & policyholders' benefits on the Consolidated Statements of Operations and Other liabilities on the Consolidated Balance Sheets.
Investments
The Company classifies its fixed maturity securities as either available-for-sale or trading, and as such, they are carried at fair value. Changes in fair value of trading securities are reported within Net investment income on
the Consolidated Statements of Operations. Changes in fair value related to available-for-sale securities are reported as a component of Other comprehensive income.
The cost of fixed maturity securities classified as available-for-sale is adjusted for amortization of premiums and accretion of discounts, which are included in Net investment income on the Consolidated Statements of Operations. The amortization of premium and accretion of discount for fixed maturity securities takes into consideration call and maturity dates that produce the lowest yield.
For asset-backed securities included in fixed maturity securities, the Company recognizes income using an effective yield based on anticipated prepayments and the estimated economic life of the securities. When estimates of prepayments change, the effective yield is recalculated to reflect actual payments to date and anticipated future payments predominantly using the retrospective method.
To the extent that unrealized gains on fixed maturity securities supporting long term care reserves would result in a premium deficiency if realized, a related increase in Insurance reserves is recorded, net of tax, as a reduction of net unrealized gains (losses), through Other comprehensive income (loss). To the extent that unrealized gains or losses on fixed maturity securities supporting structured settlements not funded by annuities would impact the reserve balance if realized, a related increase or decrease in Insurance reserves is recorded, net of tax, as a reduction or increase of net unrealized gains (losses), through Other comprehensive income (Shadow Adjustments). Shadow Adjustments, net of tax, decreased $2,416 million and $296 million for the years ended December 31, 2022 and 2021, respectively. As of December 31, 2022 and 2021, net unrealized gains on investments included in AOCI were correspondingly reduced by Shadow Adjustments of $61 million and $2,477 million, respectively.
Equity securities are carried at fair value. The Company's non-redeemable preferred stock contain characteristics of debt securities, are priced similarly to bonds and are held primarily for income generation through periodic dividends. While recognition of gains and losses on these securities is not discretionary, management does not consider the changes in fair value of non-redeemable preferred stock to be reflective of our primary operations. As such, the changes in the fair value of these securities are recorded through Net investment gains (losses) on the Consolidated Statements of Operations. The Company owns certain common stock with the intention of holding the securities primarily for market appreciation and as such, the changes in the fair value of these securities are recorded through Net investment income.
The Company's carrying value of investments in limited partnerships is its share of the net asset value of each partnership, as determined by the general partner. Certain partnerships for which results are not available on a timely basis are reported on a lag, primarily three months or less. Changes in net asset values are accounted for under the equity method and recorded within Net investment income on the Consolidated Statements of Operations.
Mortgage loans are commercial in nature, are carried at unpaid principal balance, net of unamortized fees and an allowance for expected credit losses, and are recorded once funded. The allowance for expected credit losses is developed by assessing the credit quality of pools of mortgage loans in good standing using debt service coverage ratios (DSCR) and loan-to-value ratios (LTV). The DSCR compares a property’s net operating income to its debt service payments, including principal and interest. The LTV ratio compares the current unpaid principal balance of the loan to the estimated fair value of the underlying property collateralizing the loan. The pools developed to measure the credit loss allowance use increments of DSCR and LTV to draw distinctions between risk levels. The Company applies expected credit loss rates by pool to the outstanding receivable balances. Changes in the allowance for mortgage loans are presented as a component of Net investment gains (losses) on the Consolidated Statements of Operations. See the Credit Losses section of this note for additional information on the Company’s allowances for expected credit losses. Interest income from mortgage loans is recognized on an accrual basis using the effective yield method.
Other invested assets include overseas deposits. Overseas deposits are valued using the net asset value per share (or equivalent) practical expedient. They are primarily short-term government securities, agency securities and corporate bonds held in trusts that are managed by Lloyd's of London. These funds are required of Lloyd's syndicates to protect policyholders in overseas markets and may be denominated in local currency.
Short term investments are carried at fair value, with the exception of cash accounts earning interest, which are carried at cost and approximate fair value. Changes in fair value are reported as a component of Other comprehensive income.
Purchases and sales of all securities are recorded on the trade date, except for private placement securities, including bank loan participations, which are recorded once funded. Net investment gains and losses are determined on the basis of the cost or amortized cost of the specific securities sold.
In the normal course of investing activities, the Company enters into relationships with variable interest entities (VIEs), as both an investor in limited partnerships and asset-backed securities issued by third-party VIEs. The Company is not the primary beneficiary of these VIEs, and therefore does not consolidate them. The Company determines whether it is the primary beneficiary of a VIE based on a qualitative assessment of the relative power and benefits of the Company and the other participants in the VIE. The Company’s maximum exposure to loss with respect to these investments is limited to the investment carrying values included in the Company’s Consolidated Balance Sheets and any unfunded commitments.
An available-for-sale security is impaired if the fair value of the security is less than its cost adjusted for accretion, amortization and allowance for credit losses. When a security is impaired, it is evaluated to determine whether the Company intends to sell the security before recovery of amortized cost or whether a credit loss exists. Losses on securities that the Company intends to sell are recognized as impairment losses within Net investment gains (losses) on the Consolidated Statements of Operations. If a credit loss exists, an allowance is established and the corresponding amount is recognized as an impairment loss within Net investment gains (losses) on the Consolidated Statements of Operations. The allowance for credit losses related to available-for-sale fixed maturity securities is the difference between the present value of cash flows expected to be collected and the amortized cost basis, limited by the amount that the fair value is less than the amortized cost basis. In subsequent periods, the allowance is reviewed, with any changes in the allowance presented as a component of Net investment gains (losses) on the Consolidated Statements of Operations. Changes in the difference between the amortized cost basis, net of the allowance, and the fair value, are recognized in Other comprehensive income.
Significant judgment is required in the determination of whether an impairment loss has occurred for a security. The Company follows a consistent and systematic process for determining and recording an impairment loss, including the evaluation of securities in an unrealized loss position and securities with an allowance for credit losses on at least a quarterly basis.
The Company’s assessment of whether an impairment loss has occurred incorporates both quantitative and qualitative information. A credit loss exists if the present value of cash flows expected to be collected is less than the amortized cost basis. Significant assumptions enter into these cash flow projections including delinquency rates, probable risk of default, loss severity upon a default, over collateralization and interest coverage triggers and credit support from lower level tranches. The Company considers all available evidence when determining whether an investment requires a credit loss write-down or allowance to be recorded. Examples of such evidence may include the financial condition and near-term and long-term prospects of the issuer, whether the issuer is current with interest and principal payments, credit ratings on the security or changes in ratings over time, general market conditions and industry, sector or other specific factors and whether it is likely that the Company will recover its amortized cost through the collection of cash flows. See the Credit Losses section of this note for additional information on the Company’s allowances for expected credit losses.
Credit Losses
The allowances for credit losses on fixed maturity securities, mortgage loans, reinsurance receivables and insurance receivables are valuation accounts that are reported as a reduction of a financial asset’s cost basis and are measured on a pool basis when similar risk characteristics exist. Management estimates the allowance using relevant available information from both internal and external sources. Historical credit loss experience provides the basis for the estimation of expected credit losses and adjustments may be made to reflect current conditions and reasonable and supportable forecasts. Adjustments to historical loss information are made for any additional factors that come to the Company’s attention. This could include significant shifts in
counterparty financial strength ratings, aging of past due receivables, amounts sent to collection agencies, or other underlying portfolio changes. Amounts are considered past due when payments have not been received according to contractual terms. The Company also considers current and forecast economic conditions, using a variety of economic metrics and forecast indices. The sensitivity of expected credit losses relative to changes to these forecast economic conditions can vary by financial asset class. The Company considers a reasonable and supportable forecast period to be up to 24 months from the balance sheet date. After the forecast period, the Company reverts to historical credit experience. The Company uses collateral arrangements such as letters of credit and amounts held in beneficiary trusts to mitigate credit risk, which are considered in the estimate of net amount expected to be collected. Amounts are written off against the allowance when determined to be uncollectible.
The Company has made a policy election to present accrued interest balances separately from the amortized cost basis of assets and has elected the practical expedient to exclude the accrued interest from the tabular disclosures for mortgage loans and available-for-sale securities. The Company has elected not to estimate an allowance for credit losses on accrued interest receivable. The accrual of interest income is discontinued and the asset is placed on nonaccrual status within 90 days of the interest becoming delinquent. Interest accrued but not received for assets on nonaccrual status is reversed through investment income. Interest received for assets that are on nonaccrual status is recognized as payment is received. The asset is returned to accrual status when the principal and interest amounts contractually due are brought current and future payments are expected. Interest receivable is presented as a component of accrued investment income on the Consolidated Balance Sheet.
Deferred Non-Insurance Warranty Revenue and Acquisition Expense
Non-insurance warranty revenue is primarily generated from separately-priced service contracts that provide mechanical breakdown and other coverages to vehicle or consumer goods owners. The warranty contracts generally provide coverage from 1 month to 10 years. For warranty products where the Company acts as the principal in the transaction, Non-insurance warranty revenue is reported on a gross basis, with amounts paid by customers reported as Non-insurance warranty revenue and commissions paid to agents reported as Non-insurance warranty expense.
Non-insurance warranty revenue is reported net of any premiums related to contractual liability coverage issued by the Company's insurance operations. Additionally, the Company provides warranty administration services for dealer and manufacturer obligor warranty products, which include limited warranties and guaranteed asset protection waivers. The Company recognizes Non-insurance warranty revenue over the service period in proportion to the actuarially determined expected claims emergence pattern. Customers predominantly pay in full at the inception of the warranty contract. The liability for deferred revenue represents the unearned portion of revenue in advance of the Company's performance. The deferred revenue balance includes amounts which are refundable on a pro rata basis upon cancellation.
Dealers, retailers and agents earn commission for assisting the Company in obtaining non-insurance warranty contracts. Additionally, the Company utilizes third-parties to perform warranty administrator services for its consumer goods warranties. These costs, which are deferred and recorded as Deferred non-insurance warranty acquisition expense, are amortized to Non-insurance warranty expense consistent with how the related revenue is recognized. The Company evaluates deferred costs for recoverability including consideration of anticipated investment income. Adjustments to deferred costs, if necessary, are recorded in the current period results of operations.
Income Taxes
The Company and its eligible subsidiaries (CNA Tax Group) are included in the consolidated federal income tax return of Loews and its eligible subsidiaries. The Company accounts for income taxes under the asset and liability method. Under the asset and liability method, deferred income taxes are recognized for temporary differences between the financial statement and tax return bases of assets and liabilities, based on enacted tax rates and other provisions of the tax law. The effect of a change in tax laws or rates on deferred tax assets and liabilities is recognized in income in the period in which such change is enacted. Future tax benefits are recognized to the extent that realization of such benefits is more likely than not, and a valuation allowance is
established for any portion of a deferred tax asset that management believes will not be realized. The Company releases tax effects from AOCI utilizing the security-by-security approach for Net unrealized gains (losses) on investments with an allowance for credit losses and Net unrealized gains (losses) on other investments. For Pension and postretirement benefits, tax effects from AOCI are released at enacted tax rates based on the pre-tax adjustments to pension liabilities or assets recognized within Other comprehensive income.
Pension and Postretirement Benefits
The Company recognizes the overfunded or underfunded status of its defined benefit plans in Other assets or Other liabilities on the Consolidated Balance Sheets. Changes in funded status related to prior service costs and credits, and actuarial gains and losses arising from differences between actual experience and actuarial assumptions, are recognized in the year in which the changes occur through Other comprehensive income. Unrecognized actuarial gains and losses in excess of 10% of the greater of the beginning of the year projected benefit obligation or fair value of plan assets (the corridor) are amortized as a component of net periodic pension cost (benefit) over the average remaining life expectancy of the plan participants. Annual service cost, interest cost, expected return on plan assets, amortization of prior service costs and credits and amortization of actuarial gains and losses are recognized on the Consolidated Statements of Operations.
The vested benefit obligation for the CNA Retirement Plan is determined based on eligible compensation and accrued service for previously entitled employees. Effective June 30, 2015, future benefit accruals under the CNA Retirement Plan were eliminated and the benefit obligations were frozen.
Stock-Based Compensation
The Company records compensation expense using the fair value method for all awards it grants, modifies or cancels primarily on a straight-line basis over the requisite service period, generally three years.
Foreign Currency
The Company's foreign subsidiaries' balance sheet accounts are translated at the exchange rates in effect at each reporting date and income statement accounts are either translated at the exchange rates on the date of the transaction or at average exchange rates. Foreign currency translation gains and losses are reflected in Stockholders' equity as a component of AOCI. Foreign currency transaction gains (losses) of $(22) million, less than $(1) million and $13 million were included in determining Net income for the years ended December 31, 2022, 2021 and 2020, respectively.
Leases
A lease provides the lessee the right to control the use of an identified asset for a period of time in exchange for consideration. Operating lease right-of-use (ROU) assets and lease liabilities are included in Other assets and Other liabilities on the Company's Consolidated Balance Sheets.
ROU assets represent the Company's right to use an underlying asset for the lease term and operating lease liabilities represent the Company's obligation to make lease payments arising from the lease. The Company determines if an arrangement is a lease at inception. Operating lease ROU assets and liabilities are recognized at the lease commencement date based on the present value of lease payments over the lease term. Most operating leases contain renewal options that provide for rent increases based on prevailing market conditions. Certain leases contain options to terminate before maturity. The lease term used to calculate the ROU asset includes any renewal options or lease termination options that the Company expects to exercise. The discount rate used to determine the commencement date present value of lease payments is typically the Company’s secured borrowing rate, as most of the Company’s leases do not provide an implicit rate. ROU assets include any lease payments required to be made prior to commencement and exclude lease incentives. The Company has elected to account for its lease and non-lease components as a single lease component. The Company’s non-lease components consist of variable lease costs not based on an index or rate and are excluded from the measurement of ROU assets and lease liabilities. Variable lease costs not based on an index or rate are treated as period costs, and represent charges for services provided by the landlord and the Company's reimbursement to the landlord for costs such as real estate taxes and insurance.
The Company occupies office facilities under lease agreements that expire at various dates. The Company's lease agreements do not contain significant residual value guarantees, restrictions or covenants. The Company does not have any significant finance leases.
Property and Equipment
Property and equipment are carried at cost less accumulated depreciation. Depreciation is based on the estimated useful lives of the various classes of property and equipment and is determined principally on the straight-line method. Furniture and fixtures are depreciated over seven years. Office equipment is depreciated over five years. The estimated lives for data processing equipment and software generally range from three to five years, but can be as long as ten years. Leasehold improvements are depreciated over the corresponding lease terms not to exceed the underlying asset life.
Goodwill
Goodwill represents the excess of purchase price over the fair value of the net assets of acquired entities and businesses. Goodwill in the International segment may change from period to period as a result of foreign currency translation.
Goodwill is tested for impairment annually or when certain triggering events require such tests. As a result of reviews completed for the year ended December 31, 2022, the Company determined that the estimated fair value of the reporting units were in excess of their carrying value including Goodwill. Changes in future periods in assumptions about the level of economic capital, business growth, earnings projections or the weighted average cost of capital could result in goodwill impairment.
Other Intangible Assets
Other intangible assets are reported within Other assets on the Consolidated Balance Sheets. Finite-lived intangible assets are amortized over their estimated useful lives. Indefinite-lived other intangible assets are tested for impairment annually or when certain triggering events require such tests.
Earnings (Loss) Per Share Data
Earnings (loss) per share is based on weighted average number of outstanding common shares. Basic earnings (loss) per share excludes the impact of dilutive securities and is computed by dividing Net income (loss) by the weighted average number of common shares outstanding for the period. Diluted earnings (loss) per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock.
For each of the years ended December 31, 2022, 2021 and 2020, approximately 1 million potential shares attributable to exercises or conversions into common stock under stock-based employee compensation plans were included in the calculation of diluted earnings per share. Excluded from the calculation of diluted earnings (loss) per share is the impact of potential shares attributable to exercises or conversions into common stock under stock-based employee compensation plans that would have been antidilutive during the respective periods.
Supplementary Cash Flow Information
Cash payments made for interest were $109 million, $110 million and $124 million for the years ended December 31, 2022, 2021 and 2020. Cash payments made for income taxes were $277 million, $278 million and $108 million for the years ended December 31, 2022, 2021 and 2020.
v3.22.4
Investments
12 Months Ended
Dec. 31, 2022
Investments [Abstract]  
Investments Investments
The significant components of Net investment income are presented in the following table.
Years ended December 31
(In millions)202220212020
Fixed maturity securities$1,787 $1,707 $1,728 
Equity securities23 83 65 
Limited partnership investments(12)362 121 
Mortgage loans54 61 57 
Short term investments16 
Trading portfolio18 
Other— 
Gross investment income1,877 2,223 1,999 
Investment expense(72)(64)(64)
Net investment income$1,805 $2,159 $1,935 
Net investment income (loss) recognized due to the change in fair value of common stock held as of December 31, 2022, 2021 and 2020$47 $28 $34 
As of December 31, 2022 and 2021, the Company held $0 and less than $1 million of non-income producing fixed maturity securities. As of December 31, 2022 and 2021, the Company held $7 million of non-income producing mortgage loans. As of December 31, 2022 and 2021, no investments in a single issuer exceeded 10% of stockholders' equity, other than investments in securities issued by the U.S. Treasury and obligations of government-sponsored enterprises.
Net investment gains (losses) are presented in the following table.
Years ended December 31
(In millions)202220212020
Net investment gains (losses):
Fixed maturity securities:
Gross gains$120 $186 $220 
Gross losses(261)(90)(220)
Net investment gains (losses) on fixed maturity securities(141)96 — 
Equity securities(116)(3)
Derivatives64 (10)
Mortgage loans(8)10 (21)
Short term investments and other(20)
Net investment gains (losses)$(199)$120 $(54)
Net investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock held as of December 31, 2022, 2021 and 2020$(75)$$(3)
Net investment gains (losses) for the year ended December 31, 2022 in the table above include an $18 million net gain related to the novation of a coinsurance agreement on the Company’s legacy annuity business, which was transacted on a funds withheld basis and gave rise to an embedded derivative. The net gain of $18 million is comprised of a $62 million gain on the associated embedded derivative partially offset by a $44 million loss on fixed maturity securities supporting the funds withheld liability, transferred with the novation, to recognize unrealized losses which had been included in AOCI since the inception of the coinsurance agreement. Taken together, this net gain is the final recognition of changes in the valuation of the funds held assets and offsets previously recognized net investment losses on the associated embedded derivative.
Short term investments and other included a $20 million loss for the year ended December 31, 2020 related to the redemption of the Company's $400 million senior notes due August 2021.
The components of available-for-sale impairment losses (gains) recognized in earnings by asset type are presented in the following table. The table includes losses (gains) on securities with an intention to sell and changes in the allowance for credit losses on securities since acquisition date.
Years ended December 31
(In millions)202220212020
Fixed maturity securities available-for-sale:
Corporate and other bonds$62 $11 $87 
Asset-backed— 20 24 
Impairment losses (gains) recognized in earnings$62 $31 $111 
For the years ended December 31, 2022, 2021, and 2020 the Company also recognized $8 million of losses,$10 million of gains and $21 million of losses related to mortgage loans primarily due to changes in expected credit losses.
The net change in unrealized gains on fixed maturity securities was $(7,850) million, $(1,272) million and $1,637 million for the years ended December 31, 2022, 2021 and 2020.
The following tables present a summary of fixed maturity securities.
December 31, 2022Cost or
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Allowance for Credit LossesEstimated
Fair
Value
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds$23,137 $301 $2,009 $— $21,429 
States, municipalities and political subdivisions8,918 338 939 — 8,317 
Asset-backed:
Residential mortgage-backed3,073 447 — 2,631 
Commercial mortgage-backed1,886 255 — 1,635 
Other asset-backed3,287 361 2,927 
Total asset-backed8,246 11 1,063 7,193 
U.S. Treasury and obligations of government-sponsored enterprises111 — 110 
Foreign government617 43 — 575 
   Redeemable preferred stock— — — 
Total fixed maturity securities available-for-sale41,032 652 4,056 37,627 
Total fixed maturity securities trading— — — — — 
Total fixed maturity securities$41,032 $652 $4,056 $$37,627 
December 31, 2021Cost or
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Allowance for Credit LossesEstimated
Fair
Value
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds$21,444 $2,755 $56 $11 $24,132 
States, municipalities and political subdivisions10,358 1,599 14 — 11,943 
Asset-backed:
Residential mortgage-backed2,893 71 — 2,956 
Commercial mortgage-backed1,987 63 19 — 2,031 
Other asset-backed2,561 54 10 2,598 
Total asset-backed7,441 188 37 7,585 
U.S. Treasury and obligations of government-sponsored enterprises132 — 130 
Foreign government570 15 — 583 
Redeemable preferred stock— — — — — 
Total fixed maturity securities available-for-sale39,945 4,558 112 18 44,373 
Total fixed maturity securities trading— — — 
Total fixed maturity securities$39,952 $4,558 $112 $18 $44,380 
The following tables present the estimated fair value and gross unrealized losses of fixed maturity securities in a gross unrealized loss position for which an allowance for credit loss has not been recorded, by the length of time in which the securities have continuously been in that position.
Less than 12 Months12 Months or LongerTotal
December 31, 2022Estimated
Fair Value
Gross
Unrealized
Losses
Estimated
Fair Value
Gross
Unrealized
Losses
Estimated
Fair Value
Gross
Unrealized
Losses
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds$15,946 $1,585 $1,634 $424 $17,580 $2,009 
States, municipalities and political subdivisions4,079 769 456 170 4,535 939 
Asset-backed:
Residential mortgage-backed1,406 144 1,143 303 2,549 447 
Commercial mortgage-backed1,167 159 408 96 1,575 255 
Other asset-backed2,087 262 542 99 2,629 361 
Total asset-backed4,660 565 2,093 498 6,753 1,063 
U.S. Treasury and obligations of government-sponsored enterprises76 16 92 
Foreign government473 26 78 17 551 43 
Total$25,234 $2,946 $4,277 $1,110 $29,511 $4,056 
Less than 12 Months12 Months or LongerTotal
December 31, 2021Estimated
Fair Value
Gross
Unrealized
Losses
Estimated
Fair Value
Gross
Unrealized
Losses
Estimated
Fair Value
Gross
Unrealized
Losses
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds$2,389 $48 $136 $$2,525 $56 
States, municipalities and political subdivisions730 14 — — 730 14 
Asset-backed:
Residential mortgage-backed1,043 — — 1,043 
Commercial mortgage-backed527 167 12 694 19 
Other asset-backed840 10 62 — 902 10 
Total asset-backed2,410 25 229 12 2,639 37 
U.S. Treasury and obligations of government-sponsored enterprises69 — 74 
   Foreign government97 — — 97 
Total$5,695 $92 $370 $20 $6,065 $112 
The following table presents the estimated fair value and gross unrealized losses of fixed maturity securities in a gross unrealized loss position for which an allowance for credit loss has not been recorded, by ratings distribution.
December 31, 2022December 31, 2021

(In millions)
Estimated Fair ValueGross Unrealized LossesEstimated Fair ValueGross Unrealized Losses
U.S. Government, Government agencies and Government-sponsored enterprises$2,355 $337 $898 $
AAA1,559 298 368 
AA 4,327 817 875 17 
A6,615 749 1,516 23 
BBB13,226 1,621 1,812 42 
Non-investment grade1,429 234 596 16 
Total$29,511 $4,056 $6,065 $112 
Based on current facts and circumstances, the Company believes the unrealized losses presented in the December 31, 2022 securities in a gross unrealized loss position tables above are not indicative of the ultimate collectibility of the current amortized cost of the securities, but rather are primarily attributable to changes in risk-free interest rates and a general market widening of credit spreads. In reaching this determination, the Company considered the recent volatility in risk-free rates and credit spreads as well as the fact that its unrealized losses are concentrated in investment grade issuers. Additionally, the Company has no current intent to sell securities with unrealized losses, nor is it more likely than not that it will be required to sell prior to recovery of amortized cost; accordingly, the Company has determined that there are no additional impairment losses to be recorded as of December 31, 2022.
The following tables present the activity related to the allowance on available-for-sale securities with credit impairments and purchased credit-deteriorated (PCD) assets. Accrued interest receivable on available-for-sale fixed maturity securities totaled $394 million and $369 million as of December 31, 2022 and 2021 and is excluded from the estimate of expected credit losses and the amortized cost basis in the table included within this Note.
(In millions)Corporate and other bondsAsset-backedTotal
Allowance for credit losses:
Balance as of January 1, 2022$11 $$18 
Additions to the allowance for credit losses:
Securities for which credit losses were not previously recorded— — — 
Available-for-sale securities accounted for as PCD assets— 
Reductions to the allowance for credit losses:
Securities sold during the period (realized)— — — 
Write-offs charged against the allowance12 — 12 
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period(9)(8)
Balance as of December 31, 2022
$— $$
(In millions)Corporate and other bondsAsset-backedTotal
Allowance for credit losses:
Balance as of January 1, 2021$23 $17 $40 
Additions to the allowance for credit losses:
Securities for which credit losses were not previously recorded14 — 14 
Available-for-sale securities accounted for as PCD assets11 
Reductions to the allowance for credit losses:
Securities sold during the period (realized)17 24 
Write-offs charged against the allowance16 — 16 
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period(8)(7)
Balance as of December 31, 2021
$11 $$18 
Contractual Maturity
The following table presents available-for-sale fixed maturity securities by contractual maturity.
December 3120222021
(In millions)Cost or
Amortized
Cost
Estimated
Fair
Value
Cost or
Amortized
Cost
Estimated
Fair
Value
Due in one year or less$1,012 $1,001 $1,603 $1,624 
Due after one year through five years9,880 9,399 10,637 11,229 
Due after five years through ten years13,788 12,453 13,294 14,338 
Due after ten years16,352 14,774 14,411 17,182 
Total$41,032 $37,627 $39,945 $44,373 
Actual maturities may differ from contractual maturities because certain securities may be called or prepaid. Securities not due at a single date are allocated based on weighted average life.
Limited Partnerships
The carrying value of limited partnerships as of December 31, 2022 and 2021 was $1,926 million and $1,859 million, which includes net undistributed earnings of $176 million and $266 million. Limited partnerships comprising 26% of the total carrying value are reported on a current basis through December 31, 2022 with no reporting lag, 5% are reported on a one month lag and the remainder are reported on more than a one month lag. The number of limited partnerships held and the strategies employed provide diversification to the limited partnership portfolio and the overall invested asset portfolio.
Limited partnerships comprising 76% and 68% of the carrying value as of December 31, 2022 and 2021 were invested in private debt and equity. Limited partnerships comprising 24% and 32% of the carrying value as of December 31, 2022 and 2021 employ hedge fund strategies. Private debt and equity funds cover a broad range of investment strategies including buyout, co-investment, private credit, growth capital, distressed investing and real estate. Hedge fund strategies include both long and short positions in fixed income, equity and derivative instruments.
The ten largest limited partnership positions held totaled $633 million and $665 million as of December 31, 2022 and 2021. Based on the most recent information available regarding the Company’s percentage ownership of the individual limited partnerships, the carrying value reflected on the Consolidated Balance Sheets represents approximately 1% of the aggregate partnership equity as of December 31, 2022 and 2021, and the related income reflected on the Consolidated Statements of Operations represents approximately 2% of the changes in aggregate partnership equity for the years ended December 31, 2022, 2021 and 2020.
There are risks inherent in limited partnership investments which may result in losses due to short-selling, derivatives or other speculative investment practices. The use of leverage increases volatility generated by the underlying investment strategies.
The Company’s private debt, private equity and other non-hedge fund limited partnership investments generally do not permit voluntary withdrawals. The Company’s hedge fund limited partnership investments contain withdrawal provisions that generally limit liquidity for a period of thirty days up to one year or longer. Typically, hedge fund withdrawals require advance written notice of up to 90 days.
Derivative Financial Instruments
The Company may use derivatives in the normal course of business, primarily in an attempt to reduce its exposure to market risk (principally interest rate risk and foreign currency risk) stemming from various assets and liabilities. The Company's principal objective under such strategies is to achieve the desired reduction in economic risk, even if the position does not receive hedge accounting treatment.
The Company may enter into interest rate swaps, futures and forward commitments to purchase securities to manage interest rate risk. The Company may use foreign currency forward contracts to manage foreign currency risk.
Credit exposure associated with non-performance by the counterparties to derivative instruments is generally limited to the uncollateralized fair value of the asset related to the instruments recognized on the Consolidated Balance Sheets. The Company generally requires that all over-the-counter derivative contracts be governed by an International Swaps and Derivatives Association Master Agreement, and exchanges collateral under the terms of these agreements with its derivative investment counterparties depending on the amount of the exposure and the credit rating of the counterparty. Gross estimated fair values of derivative positions are presented in Other invested assets and Other liabilities on the Consolidated Balance Sheets. The Company does not offset derivative positions against the fair value of collateral provided or positions subject to netting arrangements. There would be no significant difference in the balance included in such accounts if the estimated fair values were presented net as of December 31, 2022 and 2021.
There was less than $1 million of cash collateral provided by the Company and no cash collateral received from counterparties as of December 31, 2022. There was no cash collateral provided by the Company or cash collateral received from counterparties as of December 31, 2021.
As of December 31, 2021, the Company held an embedded derivative on a funds withheld liability related to a coinsurance agreement on its legacy annuity business. The embedded derivative had a notional value of $270 million and a fair value of $(12) million as of December 31, 2021 and was accounted for separately and reported with the funds withheld liability in Other liabilities on the Consolidated Balance Sheets. During the year ended December 31, 2022, the Company novated the coinsurance agreement resulting in the transfer of $224 million of fixed maturity securities, $4 million of short term investments and $2 million of accrued investment income in settlement of the $216 million funds withheld liability and associated $14 million embedded derivative.
Investment Commitments
As part of its overall investment strategy, the Company invests in various assets which require future purchase, sale or funding commitments. These investments are recorded once funded, and the related commitments may include future capital calls from various third-party limited partnerships, signed and accepted mortgage loan applications, and obligations related to private placement securities. As of December 31, 2022, the Company had commitments to purchase or fund approximately $1,455 million and sell approximately $60 million under the terms of these investments.
Investments on Deposit
Cash and securities with carrying values of approximately $2.8 billion and $3.0 billion were deposited by the Company’s insurance subsidiaries under requirements of regulatory authorities and others as of December 31, 2022 and 2021.
Cash and securities with carrying values of approximately $0.9 billion and $1.2 billion were deposited with financial institutions in trust accounts or as collateral for letters of credit to secure obligations with various third parties as of December 31, 2022 and 2021.
Mortgage Loans
The following table presents the amortized cost basis of mortgage loans for each credit quality indicator by year of origination.
December 31, 2022
Mortgage Loans Amortized Cost Basis by Origination Year (1)
(In millions)20222021202020192018PriorTotal
DSCR ≥1.6x
LTV less than 55%$$13 $112 $41 $53 $255 $483 
LTV 55% to 65%13 — — — — — 13
LTV greater than 65%18 11 — — — — 29
DSCR 1.2x - 1.6x
LTV less than 55%49 18 43 10 37 162
LTV 55% to 65%86 — 20 — — 114
LTV greater than 65%15 — — — — — 15
DSCR ≤1.2
LTV less than 55%35 — — 57 — — 92
LTV 55% to 65%41 21 — 38 — — 100
LTV greater than 65%27 — — 22 — 56
Total$249 $94 $150 $201 $63 $307 $1,064 
(1) The values in the table above reflect DSCR on a standardized amortization period and LTV based on the most recent appraised values trended forward using changes in a commercial real estate price index.

As of December 31, 2022, accrued interest receivable on mortgage loans totaled $4 million and is excluded from the amortized cost basis disclosed in the table above and the estimate of expected credit losses.
v3.22.4
Fair Value
12 Months Ended
Dec. 31, 2022
Fair Value Disclosures [Abstract]  
Fair Value Fair Value
Fair value is the price that would be received upon sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The following fair value hierarchy is used in selecting inputs, with the highest priority given to Level 1, as these are the most transparent or reliable.
Level 1 - Quoted prices for identical instruments in active markets.
Level 2 - Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs are observable in active markets.
Level 3 - Valuations derived from valuation techniques in which one or more significant inputs are not observable.
Prices may fall within Level 1, 2 or 3 depending upon the methodology and inputs used to estimate fair value for each specific security. In general, the Company seeks to price securities using third-party pricing services. Securities not priced by pricing services are submitted to independent brokers for valuation and, if those are not available, internally developed pricing models are used to value assets using a methodology and inputs the Company believes market participants would use to value the assets. Prices obtained from third-party pricing services or brokers are not adjusted by the Company.
The Company performs control procedures over information obtained from pricing services and brokers to ensure prices received represent a reasonable estimate of fair value and to confirm representations regarding whether inputs are observable or unobservable. Procedures may include i) the review of pricing service methodologies or broker pricing qualifications, ii) back-testing, where past fair value estimates are compared to actual transactions executed in the market on similar dates, iii) exception reporting, where period-over-period changes in price are reviewed and challenged with the pricing service or broker based on exception criteria, and iv) deep dives, where the Company performs an independent analysis of the inputs and assumptions used to price individual securities.
Assets and Liabilities Measured at Fair Value
Assets and liabilities measured at fair value on a recurring basis are presented in the following tables. Corporate bonds and other includes obligations of the U.S. Treasury, government-sponsored enterprises, foreign governments and redeemable preferred stock.
December 31, 2022   Total
Assets/Liabilities
at Fair Value
(In millions)Level 1Level 2Level 3
Assets    
Fixed maturity securities:    
Corporate bonds and other$120 $21,187 $810 $22,117 
States, municipalities and political subdivisions— 8,274 43 8,317 
Asset-backed— 6,405 788 7,193 
Total fixed maturity securities 120 35,866 1,641 37,627 
Equity securities:
Common stock150 — 35 185 
Non-redeemable preferred stock54 435 — 489 
Total equity securities204 435 35 674 
Short term and other1,608 71 — 1,679 
Total assets$1,932 $36,372 $1,676 $39,980 
Liabilities
Other liabilities$— $$— $
Total liabilities$— $$— $

December 31, 2021   Total
Assets/Liabilities
at Fair Value
(In millions)Level 1Level 2Level 3
Assets    
Fixed maturity securities:    
Corporate bonds and other$140 $23,775 $937 $24,852 
States, municipalities and political subdivisions— 11,887 56 11,943 
Asset-backed— 7,029 556 7,585 
Total fixed maturity securities 140 42,691 1,549 44,380 
Equity securities:
Common stock220 — 13 233 
Non-redeemable preferred stock65 721 16 802 
Total equity securities285 721 29 1,035 
Short term and other1,798 74 — 1,872 
Total assets$2,223 $43,486 $1,578 $47,287 
Liabilities  
Other liabilities$— $12 $— $12 
Total liabilities$— $12 $— $12 
The tables below present a reconciliation for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3).
Level 3
(In millions)
Corporate bonds and otherStates, municipalities and political subdivisionsAsset-backedEquity securitiesTotal
Balance as of January 1, 2022$937 $56 $556 $29 $1,578 
Total realized and unrealized investment gains (losses):
Reported in Net investment gains (losses)(2)— (6)
Reported in Net investment income— 16 (3)14 
Reported in Other comprehensive income (loss)(184)(13)(126)— (323)
Total realized and unrealized investment gains (losses)(185)(13)(101)(9)(308)
Purchases137 — 424 19 580 
Sales(5)— (2)(3)(10)
Settlements(84)— (70)(145)
Transfers into Level 310 — 75 — 85 
Transfers out of Level 3— — (94)(10)(104)
Balance as of December 31, 2022$810 $43 $788 $35 $1,676 
Unrealized gains (losses) on Level 3 assets and liabilities held as of December 31, 2022 recognized in Net income (loss) in the period$— $— $— $(4)$(4)
Unrealized gains (losses) on Level 3 assets and liabilities held as of December 31, 2022 recognized in Other comprehensive income (loss) in the period(183)(13)(125)— (321)

Level 3
(In millions)
Corporate bonds and otherStates, municipalities and political subdivisionsAsset-backedEquity securitiesTotal
Balance as of January 1, 2021$770 $46 $308 $27 $1,151 
Total realized and unrealized investment gains (losses):
Reported in Net investment gains (losses)(10)— — (2)(12)
Reported in Net investment income— — 
Reported in Other comprehensive income (loss)(32)(1)(10)— (43)
Total realized and unrealized investment gains (losses)(42)(1)(3)— (46)
Purchases312 12 287 612 
Sales(3)— (9)(20)(32)
Settlements(68)(1)(61)— (130)
Transfers into Level 320 — 109 21 150 
Transfers out of Level 3(52)— (75)— (127)
Balance as of December 31, 2021$937 $56 $556 $29 $1,578 
Unrealized gains (losses) on Level 3 assets and liabilities held as of December 31, 2021 recognized in Net income (loss) in the period$— $— $— $(2)$(2)
Unrealized gains (losses) on Level 3 assets and liabilities held as of December 31, 2021 recognized in Other comprehensive income (loss) in the period(32)(1)(11)— (44)
Securities may be transferred in or out of levels within the fair value hierarchy based on the availability of observable market information and quoted prices used to determine the fair value of the security. The availability of observable market information and quoted prices varies based on market conditions and trading volume.
Valuation Methodologies and Inputs
The following section describes the valuation methodologies and relevant inputs used to measure different financial instruments at fair value, including an indication of the level in the fair value hierarchy in which the instruments are generally classified.
Fixed Maturity Securities
Level 1 securities include highly liquid government securities and exchange traded bonds, valued using quoted market prices. Level 2 securities include most other fixed maturity securities as the significant inputs are observable in the marketplace. All classes of Level 2 fixed maturity securities are valued using a methodology based on information generated by market transactions involving identical or comparable assets, a discounted cash flow methodology, or a combination of both when necessary. Common inputs for all classes of fixed maturity securities include prices from recently executed transactions of similar securities, marketplace quotes, benchmark yields, spreads off benchmark yields, interest rates and U.S. Treasury or swap curves. Specifically for asset-backed securities, key inputs include prepayment and default projections based on past performance of the underlying collateral and current market data. Fixed maturity securities are primarily assigned to Level 3 in cases where broker/dealer quotes are significant inputs to the valuation and there is a lack of transparency as to whether these quotes are based on information that is observable in the marketplace. Level 3 securities also include private placement debt securities whose fair value is determined using internal models with some inputs that are not market observable.
Equity Securities
Level 1 equity securities include publicly traded securities valued using quoted market prices. Level 2 securities are primarily valued using pricing for similar securities, recently executed transactions and other pricing models utilizing market observable inputs. Level 3 securities are primarily priced using broker/dealer quotes and internal models with some inputs that are not market observable.
Short Term and Other Invested Assets
Securities that are actively traded or have quoted prices are classified as Level 1. These securities include money market funds and treasury bills. Level 2 primarily includes non-U.S. government securities for which all inputs are market observable. Fixed maturity securities purchased within one year of maturity are classified consistent with fixed maturity securities discussed above. Short term investments as presented in the tables above differ from the amounts presented on the Consolidated Balance Sheets because certain short term investments, such as time deposits, are not measured at fair value.
As of December 31, 2022 and December 31, 2021, there were $72 million and $74 million of overseas deposits within Other invested assets, which can be redeemed at net asset value in 90 days or less. Overseas deposits are excluded from the fair value hierarchy because their fair value is recorded using the net asset value per share (or equivalent) practical expedient.
Other Liabilities
Level 2 securities include currency forwards valued using observable market forward rates. As of December 31, 2021, Level 2 also included the embedded derivative on funds withheld liability which was valued based on the unrealized gain or loss position of the assets supporting the funds withheld liability, which were fixed maturity securities primarily valued with observable inputs.
Significant Unobservable Inputs
The following tables present quantitative information about the significant unobservable inputs utilized by the Company in the fair value measurements of Level 3 assets. Valuations for assets and liabilities not presented in the tables below are primarily based on broker/dealer quotes for which there is a lack of transparency as to inputs used to develop the valuations. The quantitative detail of these unobservable inputs is neither provided nor reasonably available to the Company. The weighted average rate is calculated based on fair value.
December 31, 2022Estimated Fair Value
(In millions)
Valuation Technique(s)Unobservable Input(s)Range
 (Weighted Average)
Fixed maturity securities$1,177 Discounted cash flowCredit spread
1% - 8% (2%)
December 31, 2021Estimated Fair Value
(In millions)
Valuation Technique(s)Unobservable Input(s)Range
 (Weighted Average)
Fixed maturity securities$1,225 Discounted cash flowCredit spread
1% - 7% (2%)
For fixed maturity securities, an increase to the credit spread assumptions would result in a lower fair value measurement.
Financial Assets and Liabilities Not Measured at Fair Value
The carrying amount and estimated fair value of the Company's financial assets and liabilities which are not measured at fair value on the Consolidated Balance Sheets are presented in the following tables.
December 31, 2022Carrying
Amount
Estimated Fair Value
(In millions)Level 1Level 2Level 3Total
Assets
Mortgage loans$1,040 $— $— $973 $973 
Liabilities
Short term debt$243 $— $248 $— $248 
Long term debt2,538 — 2,349 — 2,349 
December 31, 2021Carrying
Amount
Estimated Fair Value
(In millions)Level 1Level 2Level 3Total
Assets
Mortgage loans$973 $— $— $1,018 $1,018 
Liabilities
Short term debt$— $— $— $— $— 
Long term debt2,779 — 2,978 — 2,978 
The carrying amounts reported on the Consolidated Balance Sheets for Cash, Short term investments not carried at fair value, Accrued investment income and certain Other assets and Other liabilities approximate fair value due to the short term nature of these items. These assets and liabilities are not listed in the tables above.
v3.22.4
Income Taxes
12 Months Ended
Dec. 31, 2022
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
The CNA Tax Group is included in the consolidated federal income tax return of Loews and its eligible subsidiaries. Loews and the Company have agreed that for each taxable year, the Company will 1) be paid by Loews the amount, if any, by which the Loews consolidated federal income tax liability is reduced by virtue of the inclusion of the CNA Tax Group in the Loews consolidated federal income tax return, or 2) pay to Loews an amount, if any, equal to the federal income tax that would have been payable by the CNA Tax Group filing a separate consolidated tax return. In the event that Loews should have a net operating loss in the future computed on the basis of filing a separate consolidated tax return without the CNA Tax Group, the Company may be required to repay tax recoveries previously received from Loews. This agreement may be canceled by either party upon 30 days written notice.
For the years ended December 31, 2022, 2021 and 2020, the Company paid $254 million, $238 million and $65 million to Loews related to federal income taxes.
For 2020 through 2022, Loews and the Company participate in the Internal Revenue Service (IRS) Compliance Assurance Process (CAP), which is a voluntary program for large corporations. Under CAP, the IRS conducts a real-time audit and works contemporaneously with the Company to resolve any issues prior to the filing of the tax return. For 2020 and 2021, the Company was selected to participate in the phase of CAP reserved for taxpayers whose risk of noncompliance does not warrant use of IRS resources. The Company believes that this approach should reduce tax-related uncertainties, if any.
As of December 31, 2022 and 2021, there were no unrecognized tax benefits.
The Company recognizes interest accrued related to unrecognized tax benefits and tax refund claims in Income tax (expense) benefit on the Consolidated Statements of Operations. The Company recognizes penalties (if any) in Income tax (expense) benefit on the Consolidated Statements of Operations. During 2022, 2021 and 2020 the Company recognized no interest and no penalties. There were no amounts accrued for interest or penalties as of December 31, 2022 or 2021.
The following table presents a reconciliation between the Company's income tax expense at statutory rates and the recorded income tax expense.
Years ended December 31
(In millions)202220212020
Income tax expense at statutory rates$(227)$(312)$(172)
Tax benefit from tax exempt income41 51 52 
Foreign taxes and credits15 (3)
State income tax expense(10)(13)(6)
Other tax expense(6)(5)(7)
Income tax expense$(187)$(282)$(131)
As of December 31, 2022, no deferred taxes are required on the undistributed earnings of subsidiaries subject to tax.
The following table presents the current and deferred components of the Company's income tax expense.
Years ended December 31
(In millions)202220212020
Current tax expense$(221)$(235)$(180)
Deferred tax benefit (expense) 34 (47)49 
Total income tax expense$(187)$(282)$(131)
Total income tax presented above includes foreign tax expense of approximately $1 million, $18 million and $16 million related to pretax income from foreign operations of approximately $141 million, $124 million and $45 million for the years ended December 31, 2022, 2021 and 2020. Foreign tax expense for the year ended December 31, 2022 includes a $10 million tax benefit for the revaluation of net deferred tax assets related to a United Kingdom (U.K.) tax rate change.
The deferred tax effects of the significant components of the Company's deferred tax assets and liabilities are presented in the following table.
December 31
(In millions)20222021
Deferred Tax Assets:
Insurance reserves:
Property and casualty claim and claim adjustment expense reserves$188 $173 
Unearned premium reserves190 193 
Deferred Revenue64 64 
Employee benefits35 46 
Deferred retroactive reinsurance benefit89 90 
Net unrealized losses706 — 
Other assets116 88 
Gross deferred tax assets1,388 654 
Deferred Tax Liabilities:
Investment valuation differences59 93 
Deferred acquisition costs113 99 
Net unrealized gains— 272 
Software and hardware21 27 
Other liabilities17 21 
Gross deferred tax liabilities210 512 
Net deferred tax asset$1,178 $142 
As of December 31, 2022, the CNA Tax Group had no loss carryforwards and no tax credit carryforward. The foreign operations had loss carryforwards of $205 million, which have no expiration. The foreign operations had a tax credit carryforward of $6 million, which has no expiration.
Although realization of deferred tax assets is not assured, management believes it is more likely than not that the recognized net deferred tax asset will be realized through recoupment of ordinary and capital taxes paid in prior carryback years and through future earnings, reversal of existing temporary differences and available tax planning strategies. As a result, no valuation allowance was recorded as of December 31, 2022 or 2021.
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves
12 Months Ended
Dec. 31, 2022
Liability for Claims and Claims Adjustment Expense [Abstract]  
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves
Property and casualty insurance claim and claim adjustment expense reserves represent the estimated amounts necessary to resolve all outstanding claims, including IBNR claims as of the reporting date. The Company's reserve projections are based primarily on detailed analysis of the facts in each case, the Company's experience with similar cases and various historical development patterns. Consideration is given to historical patterns such as claim reserving trends and settlement practices, loss payments, pending levels of unpaid claims and product mix, as well as court decisions and economic conditions, including inflation, social inflation and public attitudes. All of these factors can affect the estimation of claim and claim adjustment expense reserves.
Establishing claim and claim adjustment expense reserves, including claim and claim adjustment expense reserves for catastrophic events that have occurred, is an estimation process. Many factors can ultimately affect the final settlement of a claim and, therefore, the necessary reserve. Changes in the law, results of litigation, medical costs, the cost of repair materials and labor rates can affect ultimate claim costs. In addition, time can be a critical part of reserving determinations since the longer the span between the incidence of a loss and the payment or settlement of the claim, the more variable the ultimate settlement amount can be. Accordingly, short-tail claims, such as property damage claims, tend to be more reasonably estimable than long-tail claims, such as long term care, workers' compensation, general liability and professional liability claims. Adjustments to prior year reserve estimates, if necessary, are reflected in the results of operations in the period that the need for such adjustments is determined. There can be no assurance that the Company's ultimate cost for insurance losses will not exceed current estimates.
Liability for Unpaid Claim and Claim Adjustment Expenses
The table below reconciles the net liability for unpaid claim and claim adjustment expenses to the amount presented on the Consolidated Balance Sheets.
As of December 31
(In millions)2022
Net liability for unpaid claim and claim adjustment expenses:
Specialty$5,563 
Commercial8,430 
International2,003 
Life & Group (1)
3,573 
Corporate & Other339 
Total net claim and claim adjustment expenses19,908 
Reinsurance receivables: (2)
Specialty1,315 
Commercial965 
International400 
Life & Group101 
Corporate & Other (3)
2,410 
Total reinsurance receivables5,191 
Total gross liability for unpaid claim and claim adjustment expenses$25,099 
(1) The Life & Group segment amounts are primarily related to long term care claim reserves for policyholders on claim, but also include amounts related to unfunded structured settlements arising from short-duration contracts. Long term care policies are long-duration contracts.
(2) Reinsurance receivables presented are gross of the allowance for uncollectible reinsurance and do not include reinsurance receivables related to paid losses.
(3) The Corporate & Other Reinsurance receivables are primarily related to A&EP claims covered under the Loss Portfolio Transfer (LPT).
The following table presents a reconciliation between beginning and ending claim and claim adjustment expense reserves, including claim and claim adjustment expense reserves of the Life & Group segment.
As of or for the years ended December 31
(In millions)202220212020
Reserves, beginning of year:
Gross$24,174 $22,706 $21,720 
Ceded4,969 4,005 3,835 
Net reserves, beginning of year19,205 18,701 17,885 
Reduction of net reserves due to Excess Workers' Compensation Loss Portfolio Transfer— (632)— 
Net incurred claim and claim adjustment expenses:
Provision for insured events of current year6,243 5,970 5,793 
Increase (decrease) in provision for insured events of prior years(187)(104)(119)
Amortization of discount170 174 183 
Total net incurred (1)
6,226 6,040 5,857 
Net payments attributable to:
Current year events(913)(1,014)(948)
Prior year events(4,348)(3,830)(4,216)
Total net payments(5,261)(4,844)(5,164)
Foreign currency translation adjustment and other(262)(60)123 
Net reserves, end of year19,908 19,205 18,701 
Ceded reserves, end of year5,191 4,969 4,005 
Gross reserves, end of year$25,099 $24,174 $22,706 
(1) Total net incurred above does not agree to Insurance claims and policyholders' benefits as reflected on the Consolidated Statements of Operations due to amounts related to retroactive reinsurance deferred gain accounting, the loss on the Excess Workers' Compensation LPT, uncollectible reinsurance and benefit expenses related to future policy benefits, which are not reflected in the table above.
Reserving Methodology
In developing claim and claim adjustment expense (loss or losses) reserve estimates, the Company's actuaries perform detailed reserve analyses that are staggered throughout the year. The data is organized at a reserve group level. Every reserve group is reviewed at least once during the year, but most are reviewed more frequently. The analyses generally review losses gross of ceded reinsurance and apply the ceded reinsurance terms to the gross estimates to establish estimates net of reinsurance. Factors considered include, but are not limited to, the historical pattern and volatility of the actuarial indications, the sensitivity of the actuarial indications to changes in paid and incurred loss patterns, the consistency of claims handling processes, the consistency of case reserving practices, changes in the Company's pricing and underwriting, pricing and underwriting trends in the insurance market and legal, judicial, social and economic trends. In addition to the detailed analyses, the Company reviews actual loss emergence for all products each quarter.
In developing the loss reserve estimates for property and casualty contracts, the Company generally projects ultimate losses using several common actuarial methods as listed below. The Company reviews the various indications from the various methods and applies judgment to select an actuarial point estimate. The carried reserve may differ from the actuarial point estimate as a result of the Company's consideration of the factors noted above as well as the potential volatility of the projections associated with the specific product being analyzed and other factors affecting claims costs that may not be quantifiable through traditional actuarial analysis. The indicated required reserve is the difference between the selected ultimate loss and the inception-to-date paid losses. The difference between the selected ultimate loss and the case incurred or reported loss is IBNR. IBNR includes a provision for development on known cases as well as a provision for late reported incurred claims.
The most frequently utilized methods to project ultimate losses include the following:
Paid development: The paid development method estimates ultimate losses by reviewing paid loss patterns and applying them to accident years with further expected changes in paid loss.
Incurred development: The incurred development method is similar to the paid development method, but it uses case incurred losses instead of paid losses.
Loss ratio: The loss ratio method multiplies premiums by an expected loss ratio to produce ultimate loss estimates for each accident year.
Bornhuetter-Ferguson paid loss: The Bornhuetter-Ferguson paid loss method is a combination of the paid development approach and the loss ratio approach. This method normally determines expected loss ratios similar to the approach used to estimate the expected loss ratio for the loss ratio method.
Bornhuetter-Ferguson incurred loss: The Bornhuetter-Ferguson incurred loss method is similar to the Bornhuetter-Ferguson using premiums and paid loss method except that it uses case incurred losses.
Frequency times severity: The frequency times severity method multiplies a projected number of ultimate claims by an estimated ultimate average loss for each accident year to produce ultimate loss estimates.
Stochastic modeling: The stochastic modeling produces a range of possible outcomes based on varying assumptions related to the particular product being modeled.
For many exposures, especially those that can be considered long-tail, a particular accident or policy year may not have a sufficient volume of paid losses to produce a statistically reliable estimate of ultimate losses. In such a case, the Company's actuaries typically assign more weight to the incurred development method than to the paid development method. As claims continue to settle and the volume of paid loss increases, the actuaries may assign additional weight to the paid development method. For most of the Company's products, even the incurred losses for accident or policy years that are early in the claim settlement process will not be of sufficient volume to produce a reliable estimate of ultimate losses. In these cases, the Company may not assign much, if any weight to the paid and incurred development methods. The Company may use the loss ratio, Bornhuetter-Ferguson and/or frequency times severity methods. For short-tail exposures, the paid and incurred development methods can often be relied on sooner, primarily because the Company's history includes a sufficient number of years to cover the entire period over which paid and incurred losses are expected to change. However, the
Company may also use the loss ratio, Bornhuetter-Ferguson and/or frequency times severity methods for short-tail exposures. For other more complex reserve groups where the above methods may not produce reliable indications, the Company uses additional methods tailored to the characteristics of the specific situation.
The Company's reserving methodologies for mass tort and A&EP are similar as both are based on detailed reviews of large accounts with estimates of ultimate payments based on the facts in each case and the Company's view of applicable law and coverage litigation.
Gross and Net Carried Reserves
The following tables present the gross and net carried reserves.
December 31, 2022 Specialty CommercialInternationalLife & GroupCorporate & OtherTotal
(In millions)
Gross Case Reserves$1,529 $3,156 $817 $3,457 $1,428 $10,387 
Gross IBNR Reserves5,349 6,239 1,586 217 1,321 14,712 
Total Gross Carried Claim and Claim Adjustment Expense Reserves$6,878 $9,395 $2,403 $3,674 $2,749 $25,099 
Net Case Reserves$1,310 $2,809 $686 $3,377 $137 $8,319 
Net IBNR Reserves4,253 5,621 1,317 196 202 11,589 
Total Net Carried Claim and Claim Adjustment Expense Reserves$5,563 $8,430 $2,003 $3,573 $339 $19,908 
December 31, 2021 Specialty CommercialInternationalLife & GroupCorporate & OtherTotal
(In millions)
Gross Case Reserves$1,578 $3,184 $859 $3,383 $1,551 $10,555 
Gross IBNR Reserves4,855 5,706 1,421 371 1,266 13,619 
Total Gross Carried Claim and Claim Adjustment Expense Reserves$6,433 $8,890 $2,280 $3,754 $2,817 $24,174 
Net Case Reserves$1,338 $2,850 $744 $3,291 $146 $8,369 
Net IBNR Reserves3,927 5,215 1,196 350 148 10,836 
Total Net Carried Claim and Claim Adjustment Expense Reserves$5,265 $8,065 $1,940 $3,641 $294 $19,205 
Net Prior Year Development
Changes in estimates of claim and claim adjustment expense reserves, net of reinsurance, for prior years are defined as net prior year loss reserve development (development). These changes can be favorable or unfavorable. The following table presents development recorded for the Specialty, Commercial, International and Corporate & Other segments.
Years ended December 31
(In millions)202220212020
Pretax (favorable) unfavorable development:
Specialty$(40)$(45)$(61)
Commercial(43)(6)(7)
International(13)(2)
Corporate & Other64 6050 
Total pretax (favorable) unfavorable development$(32)$11 $(20)
Unfavorable development of $64 million was recorded within the Corporate & Other segment for the year ended December 31, 2022 largely associated with legacy mass tort abuse claims, including the Diocese of Rochester proposed settlement. Unfavorable development of $60 million and $50 million was recorded within the Corporate & Other segment for the years ended December 31, 2021 and 2020 due to legacy mass tort exposures, primarily related to abuse.
Segment Development Tables
For the Specialty, Commercial and International segments, the following tables present further detail and commentary on the development reflected in the financial statements for each of the periods presented. Also presented are loss reserve development tables that illustrate the change over time of reserves established for claim and allocated claim adjustment expenses arising from short-duration insurance contracts for certain lines of business within each of these segments. Not all lines of business or segments are presented based on their context to the Company's overall loss reserves, calendar year reserve development, or calendar year net earned premiums. Insurance contracts are considered to be short-duration contracts when the contracts are not expected to remain in force for an extended period of time.
The Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses tables, reading across, show the cumulative net incurred claim and allocated claim adjustment expenses relating to each accident year at the end of the stated calendar year. Changes in the cumulative amount across time are the result of the Company's expanded awareness of additional facts and circumstances that pertain to the unsettled claims. The Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses tables, reading across, show the cumulative amount paid for claims in each accident year as of the end of the stated calendar year. The Net Strengthening or (Releases) of Prior Accident Year Reserves tables, reading across, show the net increase or decrease in the cumulative net incurred accident year claim and allocated claim adjustment expenses during each stated calendar year and indicates whether the reserves for that accident year were strengthened or released.
The information in the tables is reported on a net basis after reinsurance and does not include the effects of discounting. The information contained in calendar years 2021 and prior is unaudited. Information contained in the tables pertaining to the Company's International segment has been presented at the year-end 2022 foreign currency exchange rates for all periods presented to remove the effects of foreign currency exchange rate changes between calendar years. The Company has presented development information for the Hardy business prospectively from the date of acquisition and is presented as a separate table within the Company's International segment. To the extent the Company enters into a commutation, the transaction is reported on a prospective basis. To the extent that the Company enters into a disposition, the effects of the disposition are reported on a retrospective basis by removing the balances associated with the disposed of business.
The amounts reported for the cumulative number of reported claims include direct and assumed open and closed claims by accident year at the claimant level. The number excludes claim counts for claims within a policy deductible where the insured is responsible for payment of losses in the deductible layer. Claim count data for certain assumed reinsurance contracts is unavailable.
IBNR includes reserves for incurred but not reported losses and expected development on case reserves. The Company does not establish case reserves for allocated loss adjusted expenses (ALAE), therefore ALAE reserves are also included in the estimate of IBNR.
Specialty
The following table presents further detail of the development recorded for the Specialty segment.
Years ended December 31
(In millions)202220212020
Pretax (favorable) unfavorable development:
Medical Professional Liability$18 $23 $35 
Other Professional Liability and Management Liability50 24 (15)
Surety(83)(73)(69)
Warranty(21)(14)(7)
Other(4)(5)(5)
Total pretax (favorable) unfavorable development$(40)$(45)$(61)
2022
Unfavorable development in medical professional liability was due to higher than expected large loss activity in multiple accident years.
Unfavorable development in other professional liability and management liability was due to higher than expected claim severity and frequency in the Company’s cyber and professional errors and omissions (E&O) businesses in multiple accident years.
Favorable development in surety was primarily due to lower than expected frequency and lack of systemic activity in recent accident years.
Favorable development in warranty was due to lower than expected loss emergence in a recent accident year.
2021
Unfavorable development in medical professional liability was due to higher than expected large loss activity in recent accident years.
Unfavorable development in other professional liability and management liability was due to higher than expected frequency of large losses in multiple accident years, and higher than expected claim severity and frequency in the Company’s cyber business in recent accident years.
Favorable development in surety was primarily due to lower than expected frequency and lack of systemic activity in recent accident years.
Favorable development in warranty was due to lower than expected loss emergence in a recent accident year.
2020
Unfavorable development in medical professional liability was primarily due to higher than expected frequency of large losses in recent accident years and unfavorable outcomes on specific claims in older accident years.
Favorable development in other professional liability and management liability was primarily due to lower than expected loss emergence in accident year 2017 and accident years prior to 2010.
Favorable development in surety was due to lower than expected frequency and lack of systemic loss activity for accident years 2019 and prior
Specialty - Line of Business Composition
The table below provides the line of business composition of the net liability for unpaid claim and claim adjustment expenses for the Specialty segment.
As of December 31
(In millions)2022
Net liability for unpaid claim and claim adjustment expenses:
Medical Professional Liability$1,526 
Other Professional Liability and Management Liability3,514 
Surety396 
Warranty50 
Other77 
Total net liability for unpaid claim and claim adjustment expenses$5,563 
Specialty - Medical Professional Liability
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$462 $479 $500 $513 $525 $535 $545 $531 $530 $530 $19,587 
2014450 489 537 530 535 529 527 524 527 12 19,818 
2015433 499 510 494 488 510 501 498 22 18,203 
2016427 487 485 499 508 510 508 12 16,136 
2017412 449 458 460 455 460 30 15,288 
2018404 429 431 448 470 31 15,163 
2019430 445 458 471 101 14,189 
2020477 476 455 226 10,679 
2021377 376 259 8,801 
2022329 290 6,717 
Total$4,624 $988 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$17 $119 $255 $355 $414 $462 $495 $508 $512 $517 
201423 136 258 359 417 472 489 497 504 
201522 101 230 313 384 420 444 458 
201618 121 246 339 401 436 460 
201719 107 235 308 355 388 
201821 115 211 290 349 
201917 91 183 280 
202011 61 139 
202111 49 
202210 
Total$3,154 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$1,470 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201325 
Liability for unallocated claim adjustment expenses for accident years presented31 
Total net liability for unpaid claim and claim adjustment expenses$1,526 
            
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022Total
Accident Year
2013$17 $21 $13 $12 $10 $10 $(14)$(1)$— $68 
201439 48 (7)(6)(2)(3)77 
201566 11 (16)(6)22 (9)(3)65 
201660 (2)14 (2)81 
201737 (5)48 
201825 17 22 66 
201915 13 13 41 
2020(1)(21)(22)
2021(1)(1)
Total net development for the accident years presented above34 13 16 
Total net development for accident years prior to 2013(3)
Total unallocated claim adjustment expense development— 
Total$35 $23 $18 
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
Specialty - Other Professional Liability and Management Liability
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$884 $894 $926 $885 $866 $863 $850 $846 $833 $829 $21 17,953 
2014878 898 885 831 835 854 845 841 842 29 17,583 
2015888 892 877 832 807 813 836 855 30 17,452 
2016901 900 900 904 907 891 888 57 17,976 
2017847 845 813 791 775 758 107 18,181 
2018850 864 869 906 923 142 19,995 
2019837 845 856 876 173 19,447 
2020930 944 951 408 19,333 
20211,037 1,038 706 17,983 
20221,120 1,000 15,327 
Total$9,080 $2,673 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$54 $249 $447 $618 $702 $754 $771 $779 $787 $791 
201451 223 392 515 647 707 743 787 802 
201560 234 404 542 612 677 725 794 
201664 248 466 625 701 736 784 
201757 222 394 498 557 596 
201854 282 473 599 706 
201964 263 422 567 
202067 248 400 
202158 217 
202264 
Total$5,721 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$3,359 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201399 
Liability for unallocated claim adjustment expenses for accident years presented56 
Total net liability for unpaid claim and claim adjustment expenses$3,514 
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022Total
Accident Year
2013$10 $32 $(41)$(19)$(3)$(13)$(4)$(13)$(4)$(55)
201420 (13)(54)19 (9)(4)(36)
2015(15)(45)(25)23 19 (33)
2016(1)— (16)(3)(13)
2017(2)(32)(22)(16)(17)(89)
201814 37 17 73 
201911 20 39 
202014 21 
2021
Total net development for the accident years presented above(13)36 41 
Total net development for accident years prior to 2013(2)(14)
Total unallocated claim adjustment expense development— — 
Total$(15)$24 $50 
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
Specialty - Surety
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$120 $121 $115 $106 $91 $87 $83 $82 $82 $82 $5,092 
2014123 124 94 69 60 45 45 43 42 5,127 
2015131 131 104 79 63 58 53 45 5,074 
2016124 124 109 84 67 64 58 5,544 
2017120 115 103 84 71 66 5,855 
2018114 108 91 62 56 16 6,196 
2019119 112 98 87 21 6,033 
2020128 119 81 51 4,452 
2021137 129 105 4,168 
2022155 143 2,772 
Total$801 $351 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$16 $40 $69 $78 $78 $78 $77 $78 $79 $79 
201430 38 36 38 38 39 39 38 
201526 38 40 42 44 42 42 
201637 45 45 43 43 41 
201723 37 41 46 49 62 
201825 34 39 40 
201912 34 44 59 
202020 28 
202120 
202212 
Total$421 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$380 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013(4)
Liability for unallocated claim adjustment expenses for accident years presented20 
Total net liability for unpaid claim and claim adjustment expenses$396 
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022Total
Accident Year
2013$$(6)$(9)$(15)$(4)$(4)$(1)$— $— $(38)
2014(30)(25)(9)(15)— (2)(1)(81)
2015— (27)(25)(16)(5)(5)(8)(86)
2016— (15)(25)(17)(3)(6)(66)
2017(5)(12)(19)(13)(5)(54)
2018(6)(17)(29)(6)(58)
2019(7)(14)(11)(32)
2020(9)(38)(47)
2021(8)(8)
Total net development for the accident years presented above(66)(75)(83)
Total net development for accident years prior to 2013(3)— 
Total unallocated claim adjustment expense development— — — 
Total$(69)$(73)$(83)
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
Commercial
The following table presents further detail of the development recorded for the Commercial segment.
Years ended December 31
(In millions)202220212020
Pretax (favorable) unfavorable development:
Commercial Auto$49 $53 $33 
General Liability67 15 15 
Workers' Compensation(152)(82)(96)
Property and Other(7)41 
Total pretax (favorable) unfavorable development$(43)$(6)$(7)
2022
Unfavorable development in commercial auto and general liability was due to higher than expected claim severity across multiple accident years.
Favorable development in workers’ compensation was due to favorable medical trends driving lower than expected severity in multiple accident years.
2021
Unfavorable development in commercial auto was due to higher than expected claim severity in the Company’s middle market and construction businesses in multiple accident years.
Unfavorable development in general liability was due to higher than expected claim severity in the Company’s construction and umbrella businesses in multiple accident years.
Favorable development in workers’ compensation was due to favorable medical trends driving lower than expected severity in multiple accident years.
2020
Unfavorable development in commercial auto was due to higher than expected claim severity in the Company's middle market and construction businesses in recent accident years.
Unfavorable development in general liability was driven by increased bodily injury severities in accident years 2012 through 2016 and higher than expected frequency and severity in the Company’s umbrella business in accident years 2015 through 2019.
Favorable development in workers’ compensation was due to favorable medical trends driving lower than expected severity in multiple accident years.
Unfavorable development in property and other was primarily due to higher than expected large loss activity in accident year 2019 in the Company's middle market, national accounts and marine business units
Commercial - Line of Business Composition
The table below provides the line of business composition of the net liability for unpaid claim and claim adjustment expenses for the Commercial segment.
As of December 31
(In millions)2022
Net Claim and claim adjustment expenses:
Commercial Auto$787 
General Liability3,206 
Workers' Compensation3,739 
Property and Other698 
Total net liability for claim and claim adjustment expenses$8,430 
Commercial - Commercial Auto
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$246 $265 $265 $249 $245 $245 $241 $241 $241 $243 $39,431 
2014234 223 212 205 205 201 201 202 201 33,631 
2015201 199 190 190 183 181 183 182 30,430 
2016198 186 186 186 190 195 200 30,452 
2017199 198 200 221 232 239 30,947 
2018229 227 227 245 254 34,319 
2019257 266 289 323 27 37,237 
2020310 303 304 56 29,070 
2021397 388 153 32,575 
2022437 263 30,229 
Total$2,771 $521 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$74 $135 $168 $200 $225 $234 $238 $239 $239 $239 
201464 102 137 166 187 196 198 199 199 
201552 96 130 153 172 175 178 179 
201652 93 126 154 175 185 190 
201758 107 150 178 203 225 
201866 128 175 212 238 
201977 147 203 257 
202071 134 197 
202183 168 
2022112 
Total$2,004 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$767 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013
Liability for unallocated claim adjustment expenses for accident years presented16 
Total net liability for unpaid claim and claim adjustment expenses$787 
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022Total
Accident Year
2013$19 $— $(16)$(4)$— $(4)$— $— $$(3)
2014(11)(11)(7)— (4)— (1)(33)
2015(2)(9)— (7)(2)(1)(19)
2016(12)— — 
2017(1)21 11 40 
2018(2)— 18 25 
201923 34 66 
2020(7)(6)
2021(9)(9)
Total net development for the accident years presented above32 53 47 
Total net development for accident years prior to 2013— 
Total unallocated claim adjustment expense development— — — 
Total$33 $53 $49 
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
Commercial - General Liability
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$650 $655 $650 $655 $613 $623 $620 $623 $624 $629 $32 33,738 
2014653 658 654 631 635 658 659 659 676 34 28,131 
2015581 576 574 589 600 602 617 625 33 24,200 
2016623 659 667 671 673 683 684 43 24,699 
2017632 632 632 634 630 652 32 22,359 
2018653 644 646 639 650 127 20,242 
2019680 682 682 691 227 19,265 
2020723 722 726 434 13,998 
2021782 784 527 13,775 
2022929 835 10,572 
Total$7,046 $2,324 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$31 $128 $240 $352 $450 $510 $551 $572 $582 $586 
201431 119 247 376 481 547 569 607 624 
201519 110 230 357 446 501 530 561 
201632 163 279 407 481 524 582 
201723 118 250 399 471 553 
201833 107 228 307 428 
201925 98 181 322 
202023 99 192 
202126 140 
202229 
Total$4,017 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$3,029 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013118 
Liability for unallocated claim adjustment expenses for accident years presented59 
Total net liability for unpaid claim and claim adjustment expenses$3,206 
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022Total
Accident Year
2013$$(5)$$(42)$10 $(3)$$$$(21)
2014(4)(23)23 — 17 23 
2015(5)(2)15 11 15 44 
201636 10 61 
2017— — (4)22 20 
2018(9)(7)11 (3)
2019— 11 
2020(1)
2021
Total net development for the accident years presented above14 14 79 
Total net development for accident years prior to 2013(1)(12)
Total unallocated claim adjustment expense development— — 
Total$15 $15 $67 
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
Commercial - Workers' Compensation
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$537 $572 $592 $618 $593 $582 $561 $552 $548 $537 $82 38,979 
2014467 480 479 452 450 446 439 448 430 76 33,522 
2015422 431 406 408 394 382 372 353 80 31,899 
2016426 405 396 382 366 355 331 77 31,991 
2017440 432 421 400 402 399 81 33,130 
2018450 440 428 415 415 93 34,875 
2019452 449 437 436 105 34,324 
2020477 466 446 182 29,392 
2021468 454 202 29,886 
2022497 308 28,753 
Total$4,298 $1,286 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$80 $213 $300 $370 $417 $419 $411 $414 $417 $423 
201461 159 215 258 282 290 297 306 312 
201551 131 180 212 231 243 251 256 
201653 129 169 198 219 227 234 
201763 151 207 243 265 279 
201868 163 229 259 280 
201971 169 223 262 
202065 147 200 
202167 164 
202279 
Total$2,489 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$1,809 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 20131,874 
Other (2)
(20)
Liability for unallocated claim adjustment expenses for accident years presented76 
Total net liability for unpaid claim and claim adjustment expenses$3,739 
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022Total
Accident Year
2013$35 $20 $26 $(25)$(11)$(21)$(9)$(4)$(11)$— 
201413 (1)(27)(2)(4)(7)(18)(37)
2015(25)(14)(12)(10)(19)(69)
2016(21)(9)(14)(16)(11)(24)(95)
2017(8)(11)(21)(3)(41)
2018(10)(12)(13)— (35)
2019(3)(12)(1)(16)
2020(11)(20)(31)
2021(14)(14)
Total net development for the accident years presented above(80)(50)(110)
Adjustment for development on a discounted basis(3)
Total net development for accident years prior to 2013(18)(34)(49)
Total unallocated claim adjustment expense development— — 10 
Total$(96)$(82)$(152)
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
(2) Other includes the effect of discounting lifetime claim reserves.
International
The following table presents further detail of the development recorded for the International segment.
Years ended December 31
(In millions)2022
2021 (1)
2020 (1)
Pretax (favorable) unfavorable development:
Commercial$(10)$(35)$(2)
Specialty(4)36 
Other(3)
Total pretax (favorable) unfavorable development $(13)$$(2)
(1) Effective December 31, 2021 the International lines of business were consolidated to align with domestic operations. Prior period information has been conformed to the new line of business presentation.
2022
Favorable development in commercial was due to lower than expected loss emergence across multiple accident years.
2021
Favorable development in commercial was due to lower than expected loss emergence across multiple accident years.
Unfavorable development in specialty was due to higher than expected claim severity in the Company’s medical treatment and professional liability businesses in multiple accident years.
International - Line of Business Composition
The table below provides the composition of the net liability for unpaid claim and claim adjustment expenses for the International segment.
As of December 31
(In millions)2022
Net Claim and claim adjustment expenses:
International excluding Hardy$1,441 
Hardy562 
Total net liability for claim and claim adjustment expenses$2,003 
International, Excluding Hardy
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$279 $281 $274 $255 $250 $243 $235 $231 $234 $235 $11 23,971 
2014268 283 282 271 264 281 282 273 279 13 24,962 
2015280 295 294 278 273 275 277 277 22 23,372 
2016275 292 279 277 268 281 283 29 17,813 
2017290 351 371 364 359 348 57 18,498 
2018357 374 379 378 390 67 20,849 
2019331 344 341 348 69 18,354 
2020368 360 350 138 14,952 
2021396 385 201 13,580 
2022414 294 8,320 
Total$3,309 $901 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$48 $109 $135 $151 $165 $174 $192 $203 $209 $212 
201450 118 145 162 178 198 230 234 241 
201555 128 158 177 199 213 223 230 
201664 127 153 175 187 208 220 
201763 142 181 209 230 256 
201888 162 208 236 260 
201971 159 195 218 
202058 125 158 
202154 121 
202245 
Total$1,961 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$1,348 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201356 
Liability for unallocated claim adjustment expenses for accident years presented37 
Total net liability for unpaid claim and claim adjustment expenses$1,441 
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Total (2)
Accident Year
2013$$(7)$(19)$(5)$(7)$(8)$(4)$$$(44)
201415 (1)(11)(7)17 (9)11 
201515 (1)(16)(5)— (3)
201617 (13)(2)(9)13 
201761 20 (7)(5)(11)58 
201817 (1)12 33 
201913 (3)17 
2020(8)(10)(18)
2021(11)(11)
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
(2) The amounts included in the loss reserve development tables above are presented at the year-end 2022 foreign currency exchange rates for all periods presented to remove the effects of foreign currency exchange rate fluctuations between calendar years. The amounts included within the table on page 102 presenting the detail of the development recorded within the International segment include the impact of fluctuations in foreign currency exchange rates.
International - Hardy
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$127 $143 $136 $137 $138 $141 $142 $142 $141 $144 $7,904 
2014182 180 173 167 168 169 167 165 164 (4)8,530 
2015186 175 174 174 172 174 175 177 (2)9,722 
2016224 240 231 220 222 215 216 10,834 
2017240 248 241 242 249 249 13,204 
2018264 295 298 303 303 26 15,185 
2019216 219 214 221 37 11,374 
2020206 197 191 62 6,699 
2021174 164 83 3,384 
2022187 136 1,279 
Total$2,016 $349 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$37 $99 $119 $125 $129 $131 $135 $136 $138 $139 
201455 121 139 148 153 159 160 161 162 
201529 96 127 142 153 161 159 168 
201662 143 169 178 191 202 202 
201752 149 181 203 210 222 
201854 170 198 229 246 
201943 101 138 155 
202027 76 102 
202113 43 
202223 
Total$1,462 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$554 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013— 
Liability for unallocated claim adjustment expenses for accident years presented
Total net liability for unpaid claim and claim adjustment expenses$562 
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Total(2)
Accident Year
2013$16 $(7)$$$$$— $(1)$$17 
2014(2)(7)(6)(2)(2)(1)(18)
2015(11)(1)— (2)(9)
201616 (9)(11)(7)(8)
2017(7)— 
201831 — 39 
2019(5)
2020(9)(6)(15)
2021(10)(10)
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
(2) The amounts included in the loss reserve development tables above are presented at the year-end 2022 foreign currency exchange rates for all periods presented to remove the effects of foreign currency exchange rate fluctuations between calendar years. The amounts included within the table on page 102 presenting the detail of the development recorded within the International segment include the impact of fluctuations in foreign currency exchange rates.
The table below presents information about average historical claims duration as of December 31, 2022 and is presented as required supplementary information, which is unaudited.
Average Annual Percentage Payout of Ultimate Net Incurred Claim and Allocated Claim Adjustment Expenses in Year:
12345678910
Specialty
Medical Professional Liability3.6 %17.0 %23.0 %18.0 %11.9 %8.2 %4.7 %2.3 %1.0 %0.9 %
Other Professional Liability and Management Liability6.6 %21.0 %20.7 %16.2 %10.3 %6.0 %4.3 %4.8 %1.4 %0.5 %
Surety(1)
19.0 %40.5 %20.2 %3.6 %2.1 %4.8 %(1.7)%0.4 %(0.6)%— %
Commercial
Commercial Auto26.1 %22.0 %17.6 %13.9 %10.4 %4.8 %1.7 %0.5 %— %— %
General Liability3.9 %13.7 %17.1 %18.8 %14.3 %9.4 %5.7 %4.6 %2.1 %0.6 %
Workers' Compensation15.3 %22.3 %13.7 %9.4 %6.1 %2.3 %1.1 %1.4 %1.0 %1.1 %
International
International - Excluding Hardy18.3 %22.5 %10.4 %7.1 %6.0 %6.2 %6.7 %2.9 %2.5 %1.3 %
International - Hardy19.7 %34.0 %13.4 %7.0 %4.4 %3.9 %0.6 %2.1 %1.0 %0.7 %
(1) Due to the nature of the Surety business, average annual percentage payout of ultimate net incurred claim and allocated claim adjustment expenses has been calculated using only the payouts of mature accident years presented in the loss reserve development tables.
A&EP Reserves
In 2010, Continental Casualty Company (CCC) together with several of the Company’s insurance subsidiaries completed a transaction with National Indemnity Company (NICO), a subsidiary of Berkshire Hathaway Inc., under which substantially all of the Company’s legacy A&EP liabilities were ceded to NICO through a LPT. At the effective date of the transaction, the Company ceded approximately $1.6 billion of net A&EP claim and allocated claim adjustment expense reserves to NICO under a retroactive reinsurance agreement with an aggregate limit of $4 billion. The $1.6 billion of claim and allocated claim adjustment expense reserves ceded to NICO was net of $1.2 billion of ceded claim and allocated claim adjustment expense reserves under existing third-party reinsurance contracts. The NICO LPT aggregate reinsurance limit also covers credit risk on the existing third-party reinsurance related to these liabilities. The Company paid NICO a reinsurance premium of $2 billion and transferred to NICO billed third-party reinsurance receivables related to A&EP claims with a net book value of $215 million, resulting in total consideration of $2.2 billion.
In years subsequent to the effective date of the LPT, the Company recognized adverse prior year development on its A&EP reserves resulting in additional amounts ceded under the LPT. As a result, the cumulative amounts ceded under the LPT have exceeded the $2.2 billion consideration paid, resulting in the NICO LPT moving into a gain position, requiring retroactive reinsurance accounting. Under retroactive reinsurance accounting, this gain is deferred and only recognized in earnings in proportion to actual paid recoveries under the LPT. Over the life of the contract, there is no economic impact as long as any additional losses incurred are within the limit of the LPT. In a period in which the Company recognizes a change in the estimate of A&EP reserves that increases or decreases the amounts ceded under the LPT, the proportion of actual paid recoveries to total ceded losses is affected and the change in the deferred gain is recognized in earnings as if the revised estimate of ceded losses was available at the effective date of the LPT. The effect of the deferred retroactive reinsurance benefit is recorded in Insurance claims and policyholders' benefits in the Consolidated Statements of Operations.
The following table presents the impact of the Loss Portfolio Transfer on the Consolidated Statements of Operations.
Years ended December 31
(In millions)202220212020
Additional amounts ceded under LPT:
Net A&EP adverse development before consideration of LPT$92 $143 $125 
Provision for uncollectible third-party reinsurance on A&EP(5)(5)(25)
Total additional amounts ceded under LPT87 138 100 
Retroactive reinsurance benefit recognized(91)(107)(94)
Pretax impact of deferred retroactive reinsurance$(4)$31 $
Net unfavorable prior year development of $92 million, $143 million and $125 million was recognized before consideration of cessions to the LPT for the years ended December 31, 2022, 2021 and 2020. The unfavorable development in 2022, 2021 and 2020 was primarily driven by higher than anticipated defense and indemnity costs on known direct asbestos and environmental accounts and a reduction in estimated reinsurance recoverable. Additionally, in 2022, 2021 and 2020, the Company released $5 million, $5 million and $25 million of its provision for uncollectible third-party reinsurance.
As of December 31, 2022 and 2021, the cumulative amounts ceded under the LPT were $3.5 billion and $3.4 billion. The unrecognized deferred retroactive reinsurance benefit was $425 million and $429 million as of December 31, 2022 and 2021 and is included within Other liabilities on the Consolidated Balance Sheets.
NICO established a collateral trust account as security for its obligations to the Company. The fair value of the collateral trust account was $2.4 billion as of December 31, 2022. In addition, Berkshire Hathaway Inc. guaranteed the payment obligations of NICO up to the aggregate reinsurance limit as well as certain of NICO’s performance obligations under the trust agreement. NICO is responsible for claims handling and billing and collection from third-party reinsurers related to the majority of the Company’s A&EP claims.
Excess Workers' Compensation LPT
On February 5, 2021, CCC completed a transaction with Cavello Bay Reinsurance Limited (Cavello), a subsidiary of Enstar Group Limited, under which certain legacy excess workers' compensation (EWC) liabilities were ceded to Cavello. Under the terms of the transaction, based on reserves in place as of January 1, 2020, the Company ceded approximately $690 million of net EWC claim and allocated claim adjustment expense reserves to Cavello under an LPT with an aggregate limit of $1 billion. The Company paid Cavello a reinsurance premium of $697 million, less claims paid between January 1, 2020 and the closing date of the agreement of $64 million. After transaction costs, the Company recognized an after-tax loss of approximately $12 million in the Corporate & Other segment in the first quarter of 2021 related to the EWC LPT.
As of December 31, 2022, the cumulative amount ceded under the EWC LPT was $690 million.
Cavello established a collateral trust as security for its obligations to the Company. The fair value of the collateral trust was $608 million as of December 31, 2022.
Life & Group Policyholder Reserves
The Company’s Life & Group segment includes its run-off long term care business as well as structured settlement obligations not funded by annuities related to certain property and casualty claimants. Long term care policies provide benefits for nursing homes, assisted living facilities and home health care subject to various daily and lifetime caps. Generally, policyholders must continue to make periodic premium payments to keep the policy in force and the Company has the ability to increase policy premiums, subject to state regulatory approval.
The Company maintains both claim and claim adjustment expense reserves as well as future policy benefit reserves for policyholder benefits for the Life & Group segment. Claim and claim adjustment expense reserves consist of estimated reserves for long term care policyholders that are currently receiving benefits, including claims that have been incurred but are not yet reported. In developing the claim and claim adjustment expense reserve estimates for long term care policies, the Company’s actuaries perform a detailed claim reserve review on an annual basis. The review analyzes the sufficiency of existing reserves for policyholders currently on claim and includes an evaluation of expected benefit utilization and claim duration. In addition, claim and claim adjustment expense reserves are also maintained for the structured settlement obligations. In developing the claim and claim adjustment expense reserve estimates for structured settlement obligations, the Company's actuaries review mortality experience on an annual basis. The Company’s recorded claim and claim adjustment expense reserves reflect management's best estimate after incorporating the results of the most recent reviews.
The Company's most recent annual claim reserve reviews were completed in the third quarter of 2022. The long term care claim reserve review resulted in a $25 million pretax reduction in reserves driven by a $107 million favorable impact from the release of all remaining IBNR reserves established during 2020 and 2021 in response to the COVID-19 pandemic partially offset by an $82 million unfavorable impact from higher claim severity, including utilization and cost of care inflation, than anticipated in the reserve estimates. The structured settlement claim reserve review resulted in a $5 million pretax reduction in reserves due to discount rate assumption changes. The Company's 2021 annual claim reserve reviews were completed in the third quarter of 2021 resulting in a $40 million pretax reduction in long term care reserves primarily due to lower claim severity than anticipated in the reserve estimates and a $2 million pretax increase in the structured settlement claim reserves primarily due to lower discount rate assumptions and mortality assumption changes.
Future policy benefit reserves consist of active life reserves related to the Company’s long term care policies for policyholders that are not currently receiving benefits and represent the present value of expected future benefit payments and expenses less expected future premium. The determination of these reserves requires management to make estimates and assumptions about expected investment and policyholder experience over the life of the contract. Since many of these contracts may be in force for several decades, these assumptions are subject to significant estimation risk.
The actuarial assumptions that management believes are subject to the most variability are morbidity, persistency, discount rates and anticipated future premium rate increases. Morbidity is the frequency and severity of injury, illness, sickness and diseases contracted. Persistency is the percentage of policies remaining in force and can be affected by policy lapses, benefit reductions and death. Discount rates are influenced by the investment yield on assets supporting long term care reserves which is subject to interest rate and market
volatility and may also be affected by changes to the Internal Revenue Code. Future premium rate increases are generally subject to regulatory approval, and therefore the exact timing and size of the approved rate increases are unknown. As a result of this variability, the Company’s long term care reserves may be subject to material increases if actual experience develops adversely to the Company’s expectations.
Annually, in the third quarter, management assesses the adequacy of its long term care future policy benefit reserves by performing a GPV to determine if there is a premium deficiency. Under the GPV, management estimates required reserves using best estimate assumptions as of the date of the assessment without provisions for adverse deviation. The GPV required reserves are then compared to the existing recorded reserves. If the GPV required reserves are greater than the existing recorded reserves, the existing assumptions are unlocked and future policy benefit reserves are increased to the greater amount. Any such increase is reflected in the Company’s results of operations in the period in which the need for such adjustment is determined. If the GPV required reserves are less than the existing recorded reserves, assumptions remain locked in and no adjustment is made.
The GPV for the long term care future policy benefit reserves, performed in the third quarters of 2022 and 2021, indicated recorded reserves included a pretax margin of approximately $125 million and $72 million as of September 30, 2022 and 2021.
v3.22.4
Legal Proceedings, Contingencies and Guarantees
12 Months Ended
Dec. 31, 2022
Legal Proceedings, Commitments and Contingencies, and Guarantees [Abstract]  
Legal Proceedings, Contingencies and Guarantees Legal Proceedings, Contingencies and Guarantees
The Company is a party to various claims and litigation incidental to its business, which, based on the facts and circumstances currently known, are not material to the Company's results of operations or financial position.
Guarantees
The Company has provided guarantees, if the primary obligor fails to perform, to holders of structured settlement annuities issued by a previously owned subsidiary. As of December 31, 2022, the potential amount of future payments the Company could be required to pay under these guarantees was approximately $1.6 billion, which will be paid over the lifetime of the annuitants. The Company does not believe any payment is likely under these guarantees, as the Company is the beneficiary of a trust that must be maintained at a level that approximates the discounted reserves for these annuities.
v3.22.4
Reinsurance
12 Months Ended
Dec. 31, 2022
Reinsurance Disclosures [Abstract]  
Reinsurance Reinsurance
The Company cedes insurance to reinsurers to limit its maximum loss, provide greater diversification of risk, minimize exposures on larger risks and to exit certain lines of business. The ceding of insurance does not discharge the primary liability of the Company. A credit exposure exists with respect to reinsurance ceded to the extent that any reinsurer is unable to meet its obligations. A collectibility exposure also exists to the extent that the reinsurer disputes the liabilities assumed under reinsurance agreements. Property and casualty reinsurance coverages are tailored to the specific risk characteristics of each product line and the Company's retained amount varies by type of coverage. Reinsurance contracts are purchased to protect specific lines of business such as property and workers' compensation. Corporate catastrophe reinsurance is also purchased for property and workers' compensation exposure. The Company also utilizes facultative reinsurance in certain lines. In addition, the Company assumes reinsurance primarily through Hardy and as a member of various reinsurance pools and associations.
The following table presents the amounts receivable from reinsurers.
December 31
(In millions)20222021
Reinsurance receivables related to insurance reserves:
Ceded claim and claim adjustment expenses$5,191 $4,969 
Ceded future policy benefits— 288 
Reinsurance receivables related to paid losses247 227 
Reinsurance receivables5,438 5,484 
Allowance for uncollectible reinsurance(22)(21)
Reinsurance receivables, net of allowance for uncollectible reinsurance$5,416 $5,463 
The Company has established an allowance for uncollectible voluntary reinsurance receivables which relates to both amounts already billed on ceded paid losses as well as ceded reserves that will be billed when losses are paid in the future. The following table summarizes the outstanding amount of voluntary reinsurance receivables, gross of any collateral arrangements, by financial strength rating.
(In millions)December 31, 2022
A- to A++$3,785 
B- to B++1,020 
Insolvent
Total voluntary reinsurance outstanding balance(1)
$4,808 
(1)    Expected credit losses for legacy A&EP receivables are ceded to NICO and the reinsurance limit on the LPT has not been exhausted, therefore no allowance is recorded for these receivables and they are excluded from the table above. Refer to Note E to the Consolidated Financial Statements for information regarding the LPT. The Company has also excluded receivables from involuntary pools.
The Company attempts to mitigate its credit risk related to reinsurance by entering into reinsurance arrangements with reinsurers that have credit ratings above certain levels and by obtaining collateral. On a limited basis, the Company may enter into reinsurance agreements with reinsurers that are not rated, primarily captive reinsurers. Receivables from captive reinsurers are backed by collateral arrangements and comprise the majority of the voluntary reinsurance receivables within the B- to B++ rating distribution in the table above. The primary methods of obtaining collateral are through reinsurance trusts, letters of credit and funds withheld balances. Such collateral, limited by the balance of open recoverables, was approximately $3.7 billion and $4.0 billion as of December 31, 2022 and 2021.
The Company's largest recoverables from a single reinsurer as of December 31, 2022, including ceded unearned premium reserves, were approximately $1.9 billion from subsidiaries of the Berkshire Hathaway Insurance Group, $598 million from Cavello Bay Reinsurance Limited and $446 million from the Gateway Rivers Insurance Company. These amounts are substantially collateralized or otherwise secured. The recoverable
from subsidiaries of the Berkshire Hathaway Insurance Group includes amounts related to third-party reinsurance for which NICO has assumed the credit risk under the terms of the LPT as discussed in Note E to the Consolidated Financial Statements.
The effects of reinsurance on earned premiums and written premiums are presented in the following tables.
(In millions)DirectAssumedCededNetAssumed/
Net %
2022 Earned Premiums
Property and casualty$13,097 $231 $5,134 $8,194 2.8 %
Long term care427 46 — 473 9.7 %
Total earned premiums$13,524 $277 $5,134 $8,667 3.2 %
2021 Earned Premiums
Property and casualty$12,554 $240 $5,110 $7,684 3.1 %
Long term care443 48 — 491 9.8 %
Total earned premiums$12,997 $288 $5,110 $8,175 3.5 %
2020 Earned Premiums
Property and casualty$11,547 $238 $4,640 $7,145 3.3 %
Long term care454 50 — 504 9.9 %
Total earned premiums$12,001 $288 $4,640 $7,649 3.8 %
(In millions)DirectAssumedCededNetAssumed/
Net %
2022 Written Premiums
Property and casualty$13,843 $235 $5,417 $8,661 2.7 %
Long term care421 46 — 467 9.9 %
Total written premiums$14,264 $281 $5,417 $9,128 3.1 %
2021 Written Premiums
Property and casualty$13,150 $255 $5,485 $7,920 3.2 %
Long term care437 48 — 485 9.9 %
Total written premiums$13,587 $303 $5,485 $8,405 3.6 %
2020 Written Premiums
Property and casualty$12,168 $229 $4,832 $7,565 3.0 %
Long term care444 50 — 494 10.1 %
Total written premiums$12,612 $279 $4,832 $8,059 3.5 %
Included in the direct and ceded earned premiums for the years ended December 31, 2022, 2021 and 2020 are $3,270 million, $3,638 million and $3,543 million related to property business that is 100% reinsured under a significant third-party captive program. The third-party captives that participate in this program are affiliated with the non-insurance company policyholders, therefore this program provides a means for the policyholders to self-insure this property risk. The Company receives and retains a ceding commission.
Insurance claims and policyholders' benefits reported on the Consolidated Statements of Operations are net of estimated reinsurance recoveries of $2,631 million, $3,058 million and $3,158 million for the years ended December 31, 2022, 2021 and 2020, including $1,796 million, $2,003 million and $2,375 million, respectively, related to the significant third-party captive program discussed above.
Long term care premiums are from long-duration contracts; property and casualty premiums are from short-duration contracts.
v3.22.4
Debt
12 Months Ended
Dec. 31, 2022
Debt Disclosure [Abstract]  
Debt Debt
Debt is composed of the following long term obligations.
December 31
(In millions)20222021
Short term debt:
Debenture of CNAF, 7.250%, face amount of $243, due November 15, 2023
$243 $— 
Long term debt:
Senior notes of CNAF:
3.950%, face amount of $550, due May 15, 2024
549 549 
4.500%, face amount of $500, due March 1, 2026
499 499 
3.450%, face amount of $500, due August 15, 2027
497 497 
3.900%, face amount of $500, due May 1, 2029
497 496 
2.050%, face amount of $500, due August 15, 2030
496 495 
Debenture of CNAF, 7.250%, face amount of $243, due November 15, 2023
— 243 
Total long term debt2,538 2,779 
Total debt$2,781 $2,779 
CCC is a member of the Federal Home Loan Bank of Chicago (FHLBC). FHLBC membership provides participants with access to additional sources of liquidity through various programs and services. As a requirement of membership in the FHLBC, CCC held $5 million of FHLBC stock as of December 31, 2022 giving it immediate access to approximately $106 million of additional liquidity. As of December 31, 2022 and 2021, CCC had no outstanding borrowings from the FHLBC.
During 2019, the Company amended and restated its existing credit agreement with a syndicate of banks. The agreement provides a five-year $250 million senior unsecured revolving credit facility which is intended to be used for general corporate purposes. At the Company's election, the commitments under the agreement may be increased from time to time up to an additional aggregate amount of $100 million, and two one-year extensions are available prior to any anniversary of the closing date, each subject to applicable consents. Under the agreement, the Company is required to pay a facility fee which will adjust automatically in the event of a change in the Company's financial ratings. The agreement includes several covenants, including maintenance of a minimum consolidated net worth and a specified ratio of consolidated indebtedness to consolidated total capitalization. The minimum consolidated net worth, as defined, at December 31, 2022, was $8.7 billion.  The calculation of minimum consolidated net worth excludes unrealized appreciation and depreciation of securities which are classified as available-for-sale. As of December 31, 2022 and 2021, the Company had no outstanding borrowings under the credit agreement.
The Company's debt obligations contain customary covenants for investment grade issuers. The Company was in compliance with all covenants as of and for the years ended December 31, 2022 and 2021.
The combined aggregate maturities for debt as of December 31, 2022 are presented in the following table.
(In millions)
2023$243 
2024550 
2025— 
2026500 
2027500 
Thereafter1,000 
Less: discount(12)
Total$2,781 
v3.22.4
Benefit Plans
12 Months Ended
Dec. 31, 2022
Retirement Benefits [Abstract]  
Benefit Plans Benefit Plans
Pension and Postretirement Health Care Benefit Plans
CNA sponsors noncontributory defined benefit pension plans, primarily through the CNA Retirement Plan, covering certain eligible employees. These plans are closed to new entrants. CNA's funding policy for defined benefit pension plans is to make contributions in accordance with applicable governmental regulatory requirements with consideration of the funded status of the plans.
Effective January 1, 2000, the CNA Retirement Plan was closed to new participants. Existing participants at that time were given a choice to either continue to accrue benefits under the CNA Retirement Plan or to cease accruals effective December 31, 1999. Employees who chose to continue to accrue benefits under the plan received benefits in accordance with plan provisions through June 30, 2015 as discussed further below. Participants who elected to cease accruals at December 31, 1999 received the present value of their accrued benefit in an accrued pension account that is credited with interest based on the annual rate of interest on 30-year Treasury securities. These employees also receive certain enhanced employer contributions in the CNA 401k Plan.
Effective June 30, 2015, the Company eliminated future benefit accruals associated with the CNA Retirement Plan. Participants who were continuing to accrue benefits under the CNA Retirement Plan up until that date are entitled to an accrued benefit payable based on their eligible compensation and accrued service through June 30, 2015. These affected participants now also receive enhanced employer contributions in the CNA 401k Plan similar to participants who elected to cease accruals effective December 31, 1999. Employees who elected to cease accruals effective December 31, 1999 were not affected by this curtailment.
CNA provides certain postretirement health care benefits to eligible retired employees, their covered dependents and their beneficiaries primarily through the CNA Health and Group Benefits Program. These postretirement benefits have largely been eliminated for active employees.
The following table presents a reconciliation of benefit obligations and plan assets.
Pension BenefitsPostretirement Benefits
(In millions)2022202120222021
Benefit obligation as of January 1$2,561 $2,769 $$
Changes in benefit obligation:
Interest cost67 62 — — 
Participants' contributions— — 
Actuarial (gain) loss(514)(84)— 
Benefits paid(171)(182)(4)(5)
Foreign currency translation and other(12)(2)— — 
Settlements— (2)— — 
Benefit obligation as of December 311,931 2,561 
Fair value of plan assets as of January 12,577 2,420 — — 
Change in plan assets:
Actual return on plan assets(374)332 — — 
Company contributions10 
Participants' contributions— — 
Benefits paid(171)(182)(4)(5)
Foreign currency translation and other(14)(1)— — 
Settlements— (2)— — 
Fair value of plan assets as of December 312,025 2,577 — — 
Funded status$94 $16 $(4)$(6)
Amounts recognized on the Consolidated Balance Sheets as of December 31:
Other assets$143 $77 $— $— 
Other liabilities(49)(61)(4)(6)
Net amount recognized$94 $16 $(4)$(6)
Amounts recognized in Accumulated other comprehensive income, not yet recognized in net periodic cost (benefit):
Net actuarial (gain) loss$743 $763 $$
Net amount recognized$743 $763 $$
The accumulated benefit obligation for all defined benefit pension plans was $1,931 million and $2,561 million as of December 31, 2022 and 2021. Changes for the years ended December 31, 2022 and 2021 include actuarial gains of $(514) million and $(84) million primarily driven by changes in the discount rate used to determine the defined benefit pension obligations.
For pension plans with a benefit obligation in excess of plan assets, the benefit obligation was $49 million and $61 million and the aggregate plan assets were $0 at December 31, 2022 and 2021.
The components of net periodic pension cost (benefit) are presented in the following table.
Years ended December 31
(In millions)202220212020
Net periodic pension cost (benefit)
Interest cost on projected benefit obligation$67 $62 $80 
Expected return on plan assets(152)(154)(155)
Amortization of net actuarial loss (gain) 30 46 45 
Settlement loss— 
Total net periodic pension cost (benefit)$(55)$(45)$(27)
The following table indicates the line items in which the non-service cost (benefit) is presented in the Consolidated Statements of Operations.
Years ended December 31
(In millions)202220212020
Non-Service Cost (benefit):
Insurance claims and policyholder's benefits(15)$(13)$(8)
Other operating expenses(40)(32)(19)
Total net periodic pension cost (benefit)$(55)$(45)$(27)
The amounts recognized in Other comprehensive income are presented in the following table.
Years ended December 31
(In millions)202220212020
Pension and postretirement benefits
Amounts arising during the period$(12)$262 $(67)
Settlement— 
Reclassification adjustment relating to prior service credit— — — 
Reclassification adjustment relating to actuarial loss30 46 45 
Total increase (decrease) in Other comprehensive income$18 $309 $(19)
    
Actuarial assumptions used for the CNA Retirement Plan and CNA Health and Group Benefits Program to determine benefit obligations are presented in the following table. The interest crediting rate is the weighted average interest rate applied to the individual pension balances for employees who elected to cease accruals effective December 31, 1999.
December 3120222021
Pension benefits
Discount rate5.350 %2.750 %
Interest crediting rate3.500 3.000 
Postretirement benefits
Discount rate5.250 %2.250 %
Actuarial assumptions used for the CNA Retirement Plan and CNA Health and Group Benefits Program to determine net cost or benefit are presented in the following table.
Years ended December 31202220212020
Pension benefits
Discount rate2.750 %2.350 %3.150 %
Expected long term rate of return6.250 6.750 7.250 
Interest crediting rate3.000 3.000 5.000 
Postretirement benefits
Discount rate2.250 %1.600 %2.300 %
To determine the discount rate assumption as of the year-end measurement date for the CNA Retirement Plan and CNA Health and Group Benefits Program, the Company considered the estimated timing of plan benefit payments and available yields on high quality fixed income debt securities. For this purpose, high quality is considered a rating of Aa or better by Moody's Investors Service, Inc. (Moody's) or a rating of AA or better from Standard & Poor's (S&P). The Company reviewed several yield curves constructed using the cash flow characteristics of the plans as well as bond indices as of the measurement date. The trend of those data points was also considered.
In determining the expected long term rate of return on plan assets assumption for the CNA Retirement Plan, CNA considered the historical performance of the benefit plan investment portfolio as well as long term market return expectations based on the investment mix of the portfolio and the expected investment horizon.
The CNA Health and Group Benefits Program has limited its share of the health care trend rate to a cost-of-living adjustment of 4% per year. For all participants, the employer subsidy on health care costs will not increase by more than 4% per year. As a result, the assumed health care cost trend rate used in measuring the accumulated postretirement benefit obligation for the CNA Health and Group Benefits Program was 4% per year in 2022, 2021 and 2020.
CNA employs a total return approach whereby a mix of equity, limited partnerships and fixed maturity securities are used to maximize the long term return of retirement plan assets for a prudent level of risk and to manage cash flows according to plan requirements. The target allocation of plan assets is 0% to 40% invested in equity securities and limited partnerships, with the remainder primarily invested in fixed maturity securities. Alternative investments, including limited partnerships, are used to enhance risk adjusted long term returns while improving portfolio diversification. The intent of this strategy is to minimize the Company's expense related to funding the plan by generating investment returns that exceed the growth of the plan liabilities over the long run. Risk tolerance is established after careful consideration of the plan liabilities, plan funded status and corporate financial conditions.
As of December 31, 2022, the Plan had committed approximately $120 million to future capital calls from various third-party limited partnership investments in exchange for an ownership interest in the related partnerships. Derivatives may be used to gain market exposure in an efficient and timely manner. Investment risk is measured and monitored on an ongoing basis through annual liability measurements, periodic asset/liability studies and quarterly investment portfolio reviews.
Pension plan assets measured at fair value on a recurring basis as well as cash are presented in the following tables.
December 31, 2022
(In millions)Level 1Level 2Level 3Total
Assets
Fixed maturity securities:
Corporate bonds and other$— $859 $$866 
States, municipalities and political subdivisions— 49 — 49 
Asset-backed— 157 166 
Total fixed maturity securities— 1,065 16 1,081 
Equity securities218 13 — 231 
Short term investments145 — 146 
Other assets— 12 — 12 
Cash— — — — 
Total assets measured at fair value$363 $1,091 $16 1,470 
Total equity securities measured at net asset value(1)
21 
Total limited partnerships measured at net asset value (1)
534 
Total$2,025 
December 31, 2021
(In millions)Level 1Level 2Level 3Total
Assets
Fixed maturity securities:
Corporate bonds and other$— $645 $$653 
States, municipalities and political subdivisions— 30 — 30 
Asset-backed— 110 — 110 
Total fixed maturity securities— 785 793 
Equity securities732 141 — 873 
Short term investments45 — — 45 
Other assets— — 
Cash— — — — 
Total assets measured at fair value$777 $934 $1,719 
Total equity securities measured at net asset value (1)
20 
Total limited partnerships measured at net asset value (1)
838 
Total$2,577 
(1) Certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the Plan's Statement of Financial Position.
The limited partnership investments held within the plan are recorded at fair value, which represents the plan's share of net asset value of each partnership, as determined by each limited partnership's general partner. Limited partnerships comprising 62% and 35% of the carrying value as of December 31, 2022 and 2021 were invested in private debt and equity. Limited partnerships comprising 38% and 65% of the carrying value as of December 31, 2022 and 2021 employ hedge fund strategies. Private debt and equity funds cover a broad range of investment strategies including buyout, private credit, growth capital and distressed investing. Hedge fund strategies include both long and short positions in fixed income, equity and derivative investments.
For a discussion of the fair value levels and the valuation methodologies used to measure fixed maturity securities, equities, derivatives and short term investments, see Note C to the Consolidated Financial Statements.
The table below presents the estimated future minimum benefit payments to participants as of December 31, 2022.
(In millions)Pension BenefitsPostretirement Benefits
2023$175 $
2024173 
2025171 — 
2026169 — 
2027167 — 
2028-2032752 
In 2023, CNA expects to contribute $6 million to its pension plans and $1 million to its postretirement health care benefit plans.
Savings Plans
CNA sponsors savings plans, which are generally contributory plans that allow most employees to contribute a maximum of 50% of their eligible compensation, subject to certain limitations prescribed by the IRS. The Company contributes matching amounts to participants amounting to 100% of the first 6% of annual eligible compensation contributed by the employee. In addition, eligible employees also receive a Company contribution of 5% of their annual eligible compensation, referred to as a basic contribution. Company contributions vest ratably over participants first five years of service.
Benefit expense for the Company's savings plans was $71 million, $65 million and $70 million for the years ended December 31, 2022, 2021 and 2020.
v3.22.4
Stock-Based Compensation
12 Months Ended
Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation Stock-Based Compensation
The CNAF Incentive Compensation Plan (the Plan) authorizes the grant of stock-based compensation to certain management personnel for up to 16 million shares of CNAF common stock. The Plan provides for awards of stock options, stock appreciation rights (SARs), restricted shares, restricted stock units (RSUs), performance-based RSUs and performance share units. Grants to employees are not designed to be spring-loaded. The number of remaining shares available for the granting of stock-based compensation under the Plan as of December 31, 2022 was approximately 4.8 million.
Substantially all of the Company's stock-based compensation is awarded under the Annual Performance Share Plan (PSP). The PSP provides officers with an opportunity to earn an award based upon attainment of specific performance goals achieved over a one-year performance period. Awards are granted in the form of performance share units at the beginning of each performance year and are generally subject to a two-year cliff vesting period after the Company’s annual performance has been determined. The performance share units become payable within a range of 0% to 200% of the number of performance share units initially granted.
Additionally, the Company may grant RSUs under the Plan in certain circumstances. These awards generally vest over a one to three-year service period following the grant date.
Stock-based compensation that is not fully vested prior to termination is generally forfeited upon termination, except in cases of retirement, death or disability, and as otherwise provided by contractual obligations. The fair value of stock-based compensation awards is based on the market value of the Company's common stock as of the date of grant, except for awards made to foreign participants, which is based on the current market value of the Company’s common stock. Payments made under the PSP are made entirely in shares of common stock granted under the Plan, except for awards made to foreign participants, which are paid in cash.
The Company recorded stock-based compensation expense related to the Plan of $36 million, $32 million and $37 million for the years ended December 31, 2022, 2021 and 2020. The related income tax benefit recognized was $8 million, $6 million and $6 million for the years ended December 31, 2022, 2021 and 2020. The compensation cost not yet recognized was $44 million, and the weighted average period over which it is expected to be recognized is 1.7 years as of December 31, 2022.
The total fair value of RSUs and performance share units that vested during the years ended December 31, 2022, 2021 and 2020 was $35 million, $36 million and $35 million, respectively.
The weighted average grant date fair value for RSUs and performance share units granted during the years ended December 31, 2022, 2021 and 2020 was $46.78, $45.82 and $34.36, respectively.
The following table presents activity for non-vested RSUs and performance share units under the Plan in 2022.
Number of AwardsWeighted Average Grant Date Fair Value
Balance as of January 1, 20222,375,598 $41.21 
Awards granted1,031,729 46.78 
Awards vested(759,352)43.69 
Awards forfeited, canceled or expired(305,321)40.71 
Performance-based adjustment123,098 46.79 
Balance as of December 31, 20222,465,752 43.10 
v3.22.4
Other Intangible Assets
12 Months Ended
Dec. 31, 2022
Intangible Assets, Gross (Excluding Goodwill) [Abstract]  
Other Intangible Assets Other Intangible Assets
Other intangible assets are presented in the following table.
December 3120222021
(In millions)Economic Useful LifeGross Carrying AmountAccumulated AmortizationGross Carrying AmountAccumulated Amortization
Finite-lived intangible assets:
Trade name8 years$$$$
Distribution channel15 years10 11 
Total finite-lived intangible assets16 13 18 14 
Indefinite-lived intangible assets:
Syndicate capacity42 47 
Agency force16 16 
Insurance licenses10 — 
Total indefinite-lived intangible assets68 63 
Total other intangible assets$84 $13 $81 $14 
The Company's other intangible assets primarily relate to the purchase of Hardy and the recent acquisition of Inverin Insurance Company in the third quarter of 2022. The amortization of the finite-lived intangible assets is included in the Statement of Operations for the International segment. Amortization expense of $1 million was included in Other operating expenses for each of the years ended December 31, 2022, 2021 and 2020. The gross carrying amounts and accumulated amortization in the table above may change from period to period as a result of foreign currency translation. Estimated future annual amortization expense for other intangible assets is $1 million in each of the years 2023 through 2027.
v3.22.4
Leases
12 Months Ended
Dec. 31, 2022
Leases [Abstract]  
Leases Leases
Total lease expense was $59 million, $57 million and $57 million for the years ended December 31, 2022, 2021 and 2020. Total lease expense includes operating lease expense of $36 million, $38 million and $38 million and variable lease expense of $23 million, $19 million and $19 million for the years ended December 31, 2022, 2021 and 2020. Cash paid for amounts included in operating lease liabilities was $42 million, $44 million and $41 million for the years ended December 31, 2022, 2021 and 2020. Operating lease ROU assets obtained in exchange for lease obligations was $20 million, $11 million and $6 million for the years ended December 31, 2022, 2021 and 2020.
The following table presents operating lease ROU assets and lease liabilities.
(In millions)December 31, 2022December 31, 2021
Operating lease ROU assets$155 $175 
Operating lease liabilities220 248 
The following table presents the maturities of operating lease liabilities.
(In millions)December 31, 2022
2023$39 
202433 
202526 
202623 
202722 
Thereafter118 
Total lease payments261 
Less: Discount(41)
Total operating lease liabilities$220 
The following table presents the weighted average remaining lease term for operating leases and weighted average discount rate used in calculating operating lease ROU assets.
December 31, 2022December 31, 2021
Weighted average remaining lease term9.2 years9.8 years
Weighted average discount rate3.4 %3.4 %
v3.22.4
Stockholders' Equity and Statutory Accounting Practices
12 Months Ended
Dec. 31, 2022
Stockholders' Equity and Statutory Accounting Practices [Abstract]  
Stockholders' Equity And Statutory Accounting Practices Stockholders’ Equity and Statutory Accounting Practices
Common Stock Dividends
There are no restrictions on the retained earnings or net income of CNAF with regard to payment of dividends to its stockholders. However, given the holding company nature of CNAF, its ability to pay a dividend is dependent on the receipt of dividends from its subsidiaries, particularly CCC, which directly or indirectly owns the vast majority of all significant subsidiaries. See the Statutory Accounting Practices section below for a discussion of the regulatory restrictions on CCC's availability to pay dividends.
CNAF's ability to pay dividends may be indirectly limited by the minimum consolidated net worth covenant in the Company's line of credit agreement. See Note H to the Consolidated Financial Statements for further discussion of the Company's debt obligations.
Statutory Accounting Practices
CNAF’s insurance subsidiaries are domiciled in various jurisdictions. These subsidiaries prepare statutory financial statements in accordance with accounting practices prescribed or permitted by the respective jurisdictions’ insurance regulators. Domestic prescribed statutory accounting practices are set forth in a variety of publications of the National Association of Insurance Commissioners (NAIC) as well as state laws, regulations and general administrative rules. These statutory accounting principles vary in certain respects from GAAP. In converting from statutory accounting principles to GAAP, the more significant adjustments include deferral of policy acquisition costs and the inclusion of net unrealized holding gains or losses in stockholders’ equity relating to certain fixed maturity securities.
The Company has a prescribed practice as it relates to the accounting under Statement of Statutory Accounting Principles No. 62R, Property and Casualty Reinsurance, paragraphs 88 and 89 in conjunction with the 2010 LPT with NICO which is further discussed in Note E to the Consolidated Financial Statements.  The prescribed practice allows the Company to aggregate all third-party A&EP reinsurance balances administered by NICO in Schedule F and to utilize the LPT as collateral for the underlying third-party reinsurance balances for purposes of calculating the statutory reinsurance penalty. This prescribed practice increased statutory capital and surplus by $74 million and $67 million at December 31, 2022 and 2021.
The payment of dividends by CNAF's insurance subsidiaries without prior approval of the insurance department of each subsidiary’s domiciliary jurisdiction is generally limited by formula. Dividends in excess of these amounts are subject to prior approval by the respective insurance regulator.
Dividends from CCC are subject to the insurance holding company laws of the State of Illinois, the domiciliary state of CCC. Under these laws, ordinary dividends, or dividends that do not require prior approval by the Illinois Department of Insurance (the Department), are determined based on the greater of the prior year's statutory net income or 10% of statutory surplus as of the end of the prior year, as well as the timing and amount of dividends paid in the preceding twelve months. Additionally, ordinary dividends may only be paid from earned surplus, which is calculated by removing unrealized gains from unassigned surplus. As of December 31, 2022, CCC is in a positive earned surplus position. The maximum allowable dividend CCC could pay during 2023 that would not be subject to the Department’s prior approval is $1,057 million, less dividends paid during the preceding twelve months measured at that point in time. CCC paid dividends of $990 million in 2022. The actual level of dividends paid in any year is determined after an assessment of available dividend capacity, holding company liquidity and cash needs as well as the impact the dividends will have on the statutory surplus of the applicable insurance company.
Combined statutory capital and surplus and statutory net income (loss) for the Combined Continental Casualty Companies are presented in the table below, determined in accordance with accounting practices prescribed or permitted by insurance and/or other regulatory authorities
Statutory Capital and SurplusStatutory Net Income (Loss)
December 31Years ended December 31
(In millions)
2022 (1)
2021
2022 (1)
20212020
Combined Continental Casualty Companies$10,572 $11,321 $1,072 $1,253 $800 
(1) Information derived from the statutory-basis financial statements to be filed with insurance regulators.
CNAF’s domestic insurance subsidiaries are subject to risk-based capital (RBC) requirements. RBC is a method developed by the NAIC to determine the minimum amount of statutory capital appropriate for an insurance company to support its overall business operations in consideration of its size and risk profile. The formula for determining the amount of RBC specifies various factors, weighted based on the perceived degree of risk, which are applied to certain financial balances and financial activity. The adequacy of a company's actual capital is evaluated by a comparison to the RBC results, as determined by the formula. Companies below minimum RBC requirements are classified within certain levels, each of which requires specified corrective action.
The statutory capital and surplus presented above for CCC was approximately 238% and 264% of company action level RBC as of December 31, 2022 and 2021. Company action level RBC is the level of RBC which triggers a heightened level of regulatory supervision. The statutory capital and surplus of the Company's foreign insurance subsidiaries, which is not significant to the overall statutory capital and surplus, also met or exceeded their respective regulatory and other capital requirements.
v3.22.4
Accumulated Other Comprehensive Income (Loss) by Component
12 Months Ended
Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income (Loss) by Component Accumulated Other Comprehensive Income (Loss) by Component
The tables below display the changes in Accumulated other comprehensive income (loss) by component.
(In millions)Net unrealized gains (losses) on investments with an allowance for credit lossesNet unrealized gains (losses) on other investmentsPension and postretirement benefitsCumulative foreign currency translation adjustmentTotal
Balance as of January 1, 2022$(2)$1,039 $(604)$(113)$320 
Other comprehensive income (loss) before reclassifications— (3,903)(11)(108)(4,022)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $(1), $21, $6, $— and $26
(126)(24)— (145)
Other comprehensive income (loss) net of tax (expense) benefit of $1, $1,007, $(3), $— and $1,005
(5)(3,777)13 (108)(3,877)
Balance as of December 31, 2022$(7)$(2,738)$(591)$(221)$(3,557)
(In millions)Net unrealized gains (losses) on investments with an allowance for credit lossesNet unrealized gains (losses) on other investmentsPension and postretirement benefitsCumulative foreign currency translation adjustmentTotal
Balance as of January 1, 2021$— $1,745 $(848)$(94)$803 
Other comprehensive income (loss) before reclassifications(7)(625)207 (19)(444)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $1, $(21), $10, $— and $(10)
(5)81 (37)— 39 
Other comprehensive income (loss) net of tax (expense) benefit of $1, $188, $(65), $— and $124
(2)(706)244 (19)(483)
Balance as of December 31, 2021$(2)$1,039 $(604)$(113)$320 


Amounts reclassified from Accumulated other comprehensive income (loss) shown above are reported in Net income (loss) as follows:
Component of AOCIConsolidated Statements of Operations Line Item Affected by Reclassifications
Net unrealized gains (losses) on investments with an allowance for credit losses and Net unrealized gains (losses) on other investmentsNet investment gains (losses)
Pension and postretirement benefitsOther operating expenses and Insurance claims and policyholders' benefits
v3.22.4
Business Segments
12 Months Ended
Dec. 31, 2022
Segment Reporting [Abstract]  
Business Segments Business Segments
The Company's property and casualty commercial insurance operations are managed and reported in three business segments: Specialty, Commercial and International. These three segments are collectively referred to as Property & Casualty Operations. Specialty provides management and professional liability and other coverages through property and casualty products and services using a network of brokers, independent agencies and managing general underwriters. Commercial works with a network of brokers and independent agents to market a broad range of property and casualty insurance products to all types of insureds targeting small business, construction, middle markets and other commercial customers. The International segment underwrites property and casualty coverages on a global basis through a branch operation in Canada, a European business consisting of insurance companies based in the U.K. and Luxembourg and Hardy, the Company's Lloyd's syndicate.
The Company's operations outside of Property & Casualty Operations are managed and reported in two segments: Life & Group and Corporate & Other. Life & Group primarily includes the results of the long term care business that is in run-off. Corporate & Other primarily includes certain corporate expenses, including interest on corporate debt and the results of certain property and casualty business in run-off, including CNA Re, A&EP, a legacy portfolio of EWC policies and certain legacy mass tort reserves.
The accounting policies of the segments are the same as those described in Note A to the Consolidated Financial Statements. The Company manages most of its assets on a legal entity basis, while segment operations are generally conducted across legal entities. As such, only Insurance and Reinsurance receivables, Insurance reserves, Deferred acquisition costs, Goodwill and Deferred non-insurance warranty acquisition expense and revenue are readily identifiable for individual segments. Distinct investment portfolios are not maintained for every individual segment; accordingly, allocation of assets to each segment is not performed. Therefore, a significant portion of Net investment income and Net investment gains or losses are allocated primarily based on each segment's net carried insurance reserves, as adjusted. All significant intersegment income and expense have been eliminated. Income taxes have been allocated on the basis of the taxable income of the segments.
Approximately 10%, 10% and 9% of the Company's direct written premiums were derived from outside the United States for the years ended December 31, 2022, 2021 and 2020.
In the following tables, certain financial measures are presented to provide information used by management to monitor the Company's operating performance. Management utilizes these financial measures to monitor the Company's insurance operations and investment portfolio.
The performance of the Company's insurance operations is monitored by management through core income (loss), which is derived from certain income statement amounts. The Company's investment portfolio is monitored by management through analysis of various factors including unrealized gains and losses on securities, portfolio duration and exposure to market and credit risk.
Core income (loss) is calculated by excluding from net income (loss) the after-tax effects of net investment gains or losses and any cumulative effects of changes in accounting guidance. The calculation of core income (loss) excludes net investment gains or losses because net investment gains or losses are generally driven by economic factors that are not necessarily reflective of our primary operations.
The Company's results of operations and selected balance sheet items by segment are presented in the following tables.
Year ended December 31, 2022
Specialty

Commercial
InternationalLife &
Group
Corporate
& Other
  
(In millions)EliminationsTotal
Net written premiums$3,306 $4,193 $1,164 $467 $(1)$(1)$9,128 
Operating revenues 
Net earned premiums$3,203 $3,923 $1,070 $473 $(1)$(1)$8,667 
Net investment income431 488 63 804 19 — 1,805 
Non-insurance warranty revenue1,574 — — — — — 1,574 
Other revenues30 (1)(5)32 
Total operating revenues5,209 4,441 1,134 1,276 24 (6)12,078 
Claims, benefits and expenses      
Net incurred claims and benefits1,839 2,607 637 1,202 76 — 6,361 
Policyholders’ dividends19 — — — — 25 
Amortization of deferred acquisition costs656 634 200 — — — 1,490 
Non-insurance warranty expense1,471 — — — — — 1,471 
Other insurance related expenses336 557 146 118 (1)1,160 
Other expenses51 36 26 174 (5)291 
Total claims, benefits and expenses4,359 3,853 1,009 1,329 254 (6)10,798 
Core income (loss) before income tax850 588 125 (53)(230)— 1,280 
Income tax (expense) benefit on core income (loss)(182)(122)(19)44 47 — (232)
Core income (loss) $668 $466 $106 $(9)$(183)$— 1,048 
Net investment gains (losses)(199)
Income tax (expense) benefit on net investment gains (losses)45 
Net investment gains (losses), after tax(154)
Net income (loss)$894 
December 31, 2022
(In millions)      
Reinsurance receivables$1,384 $1,062 $414 $101 $2,477 $— $5,438 
Insurance receivables1,082 1,728 369 — — 3,187 
Deferred acquisition costs381 321 104 — — — 806 
Goodwill117 — 27 — — — 144 
Deferred non-insurance warranty acquisition expense3,671 — — — — — 3,671 
Insurance reserves 
Claim and claim adjustment expenses6,878 9,395 2,403 3,674 2,749 — 25,099 
Unearned premiums3,193 2,425 653 103 — — 6,374 
Future policy benefits— — — 10,151 — — 10,151 
Deferred non-insurance warranty revenue4,714 — — — — — 4,714 
Year ended December 31, 2021
Specialty

Commercial
InternationalLife &
Group
Corporate
& Other
  
(In millions)EliminationsTotal
Net written premiums$3,225 $3,595 $1,101 $485 $— $(1)$8,405 
Operating revenues 
Net earned premiums$3,076 $3,552 $1,057 $491 $— $(1)$8,175 
Net investment income497 624 57 966 15 — 2,159 
Non-insurance warranty revenue1,430 — — — — — 1,430 
Other revenues23 — — (6)24 
Total operating revenues5,004 4,199 1,114 1,457 21 (7)11,788 
Claims, benefits and expenses    
Net incurred claims and benefits1,787 2,540 652 1,239 109 — 6,327 
Policyholders’ dividends19 — — — — 22 
Amortization of deferred acquisition costs643 594 206 — — — 1,443 
Non-insurance warranty expense1,328 — — — — — 1,328 
Other insurance related expenses296 511 144 103 (1)1,062 
Other expenses47 38 (2)10 155 (6)242 
Total claims, benefits and expenses4,104 3,702 1,000 1,352 273 (7)10,424 
Core income (loss) before income tax900 497 114 105 (252)— 1,364 
Income tax (expense) benefit on core income (loss)(196)(103)(28)21 48 — (258)
Core income (loss)$704 $394 $86 $126 $(204)$— 1,106 
Net investment gains (losses)120 
Income tax (expense) benefit on net investment gains (losses)(24)
Net investment gains (losses), after tax96 
Net income (loss)$1,202 
December 31, 2021
(In millions)
Reinsurance receivables$1,200 $923 $381 $401 $2,579 $— $5,484 
Insurance receivables1,136 1,488 340 — 2,974 
Deferred acquisition costs363 278 96 — — — 737 
Goodwill117 — 31 — — — 148 
Deferred non-insurance warranty acquisition expense3,476 — — — — — 3,476 
Insurance reserves 
Claim and claim adjustment expenses6,433 8,890 2,280 3,754 2,817 — 24,174 
Unearned premiums3,001 2,066 585 109 — — 5,761 
Future policy benefits— — — 13,236 — — 13,236 
Deferred non-insurance warranty revenue4,503 — — — — — 4,503 
Year ended December 31, 2020
Specialty

Commercial
Life &
Group
Corporate
& Other
(In millions)InternationalEliminationsTotal
Net written premiums$3,040 $3,565 $961 $494 $— $(1)$8,059 
Operating revenues 
Net earned premiums$2,883 $3,323 $940 $504 $— $(1)$7,649 
Net investment income449 513 58 851 64 — 1,935 
Non-insurance warranty revenue1,252 — — — — — 1,252 
Other revenues25 — — (5)26 
Total operating revenues4,585 3,861 998 1,355 69 (6)10,862 
Claims, benefits and expenses     
Net incurred claims and benefits1,792 2,375 629 1,286 67 — 6,149 
Policyholders’ dividends18 — — — — 21 
Amortization of deferred acquisition costs621 592 197 — — — 1,410 
Non-insurance warranty expense1,159 — — — — — 1,159 
Other insurance related expenses280 506 136 109 (2)(1)1,028 
Other expenses50 34 (7)141 (5)220 
Total claims, benefits and expenses3,905 3,525 955 1,402 206 (6)9,987 
Core income (loss) before income tax680 336 43 (47)(137)— 875 
Income tax (expense) benefit on core income (loss)(145)(69)(5)56 23 — (140)
Core income (loss)$535 $267 $38 $$(114)$— 735 
Net investment gains (losses)(54)
Income tax (expense) benefit on net investment gains (losses)
Net investment gains (losses), after tax(45)
Net income (loss)$690 
The following table presents operating revenues by line of business for each reportable segment.
Years ended December 31
(In millions)202220212020
Specialty
Management & Professional Liability$2,771 $2,776 $2,577 
Surety652 604 596 
Warranty & Alternative Risks1,786 1,624 1,412 
Specialty revenues5,209 5,004 4,585 
Commercial
Middle Market1,532 1,508 1,444 
Construction1,421 1,322 1,120 
Small Business581 558 482 
Other Commercial907 811 815 
Commercial revenues4,441 4,199 3,861 
International
Canada366 344 291 
Europe466 473 389 
Hardy302 297 318 
International revenues1,134 1,114 998 
Life & Group revenues1,276 1,457 1,355 
Corporate & Other revenues 24 21 69 
Eliminations(6)(7)(6)
Total operating revenues12,078 11,788 10,862 
Net investment gains (losses)(199)120 (54)
Total revenues$11,879 $11,908 $10,808 
v3.22.4
Related Party Transactions
12 Months Ended
Dec. 31, 2022
Related Party Transactions [Abstract]  
Related Party Transactions Related Party TransactionsThe Company reimburses Loews for, or pays directly, fees and expenses of investment facilities and services provided to the Company. Additionally, the Company provides investment-related processing services to Loews and charges Loews for these services. The net amounts incurred by the Company for these fees, expenses and services were $51 million, $47 million and $47 million for the years ended December 31, 2022, 2021 and 2020. Net amounts due to Loews related to these services, included in Other liabilities and payable in the first quarter of the subsequent year, were $26 million and $23 million as of December 31, 2022 and 2021. In addition, the Company reimbursed Loews for general corporate services and related travel expenses of $1 million for the years ended December 31, 2022 and 2021. The CNA Tax Group is included in the consolidated federal income tax return of Loews and its eligible subsidiaries. The related receivable from Loews, included in Other assets, was $18 million for the year ended December 31, 2022. The related payable due to Loews, included in Other liabilities, was $33 million for the year ended December 31, 2021. For a detailed description of the income tax agreement with Loews see Note D to the Consolidated Financial Statements. In 2021, the Company wrote an appeal bond for Loews at standard rates, which was increased in 2022, resulting in additional premium from Loews. The aforementioned appeal bond expired in December 2022. In addition, the Company writes, at standard rates, a limited amount of insurance for Loews and its subsidiaries. The earned premiums for each of the years ended December 31, 2022, 2021 and 2020 were $3 million, $2 million, and $2 million.
v3.22.4
Non-Insurance Revenues from Contracts with Customers
12 Months Ended
Dec. 31, 2022
Revenue from Contract with Customer [Abstract]  
Non-Insurance Revenues from Contracts with Customers Non-Insurance Revenues from Contracts with Customers
Non-Insurance revenue is recognized when obligations under the terms of a contract with a customer are satisfied; generally this occurs over time as obligations are fulfilled. Revenue is measured as the amount of consideration the Company expects to receive in exchange for providing services.
Deferred Non-Insurance Warranty Revenue
The Company had deferred non-insurance warranty revenue balances of $4.7 billion and $4.5 billion reported in Deferred non-insurance warranty revenue as of December 31, 2022 and 2021. The increase in the deferred revenue balance for the year ended December 31, 2022 was primarily driven by deferrals outpacing revenue recognized in the period due to growth in the business. For the year ended December 31, 2022, the Company recognized $1.3 billion of revenues that were included in the deferred revenue balance as of January 1, 2022. For the year ended December 31, 2021, the Company recognized $1.2 billion of revenues that were included in the deferred revenue balance as of January 1, 2021. For the years ended December 31, 2022 and 2021, Non-insurance warranty revenue recognized from performance obligations related to prior periods due to a change in estimate was not material. The Company expects to recognize approximately $1.5 billion of the deferred revenue in 2023, $1.1 billion in 2024, $0.8 billion in 2025 and $1.3 billion thereafter.
Cost to Obtain and Fulfill Non-Insurance Warranty Contracts with Customers
For the years ended December 31, 2022 and 2021, capitalized commission costs were $3.6 billion and $3.5 billion and capitalized administrator service costs were $53 million and $47 million. For the years ended December 31, 2022 and 2021, the amount of amortization of capitalized costs was $1.2 billion and $1.1 billion and there were no impairment losses related to the costs capitalized. There were no adjustments to deferred costs recorded for the years ended December 31, 2022 and 2021.
v3.22.4
Schedule I. Summary of Investments - Other Than Investments in Related Parties
12 Months Ended
Dec. 31, 2022
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract]  
Schedule I. Summary of Investments - Other than Investments in Related Parties
SCHEDULE I. SUMMARY OF INVESTMENTS - OTHER THAN INVESTMENTS IN RELATED PARTIES
Incorporated herein by reference to Note B to the Consolidated Financial Statements included under Item 8.
v3.22.4
Schedule II. Condensed Financial Information of Registrant (Parent Company)
12 Months Ended
Dec. 31, 2022
Condensed Financial Information Disclosure [Abstract]  
Schedule II. Condensed Financial Information of Registrant (Parent Company)
SCHEDULE II. CONDENSED FINANCIAL INFORMATION OF REGISTRANT (PARENT COMPANY)
CNA Financial Corporation
Statements of Operations and Comprehensive Income
Years ended December 31
(In millions)202220212020
Revenues
Net investment income$$— $
Net investment losses— — (20)
Total revenues— (17)
Expenses
Administrative and general
Interest112 112 122 
Total expenses113 113 123 
Loss from operations before income taxes and equity in net income of subsidiaries(105)(113)(140)
Income tax benefit11 18 
Loss before equity in net income of subsidiaries(99)(102)(122)
Equity in net income of subsidiaries993 1,304 812 
Net income894 1,202 690 
Equity in other comprehensive (loss) income of subsidiaries(3,877)(483)752 
Total comprehensive (loss) income$(2,983)$719 $1,442 
See accompanying Notes to Condensed Financial Information as well as the
Consolidated Financial Statements and accompanying Notes.
CNA Financial Corporation
Balance Sheets
December 31
(In millions, except share data)20222021
Assets
Investment in subsidiaries$11,063 $14,937 
Cash
Short term investments578 685 
Amounts due from affiliates
Total assets$11,647 $15,626 
Liabilities
Short term debt$243 $— 
Long term debt2,538 2,779 
Other liabilities41 38 
Total liabilities2,822 2,817 
Stockholders' Equity
Common stock ($2.50 par value; 500,000,000 shares authorized; 273,040,243 shares issued; 270,895,902 and 271,363,999 shares outstanding)
683 683 
Additional paid-in capital2,220 2,215 
Retained earnings9,572 9,663 
Accumulated other comprehensive (loss) income(3,557)320 
Treasury stock (2,144,341 and 1,676,244 shares), at cost
(93)(72)
Total stockholders' equity8,825 12,809 
Total liabilities and stockholders' equity$11,647 $15,626 
See accompanying Notes to Condensed Financial Information as well as the
Consolidated Financial Statements and accompanying Notes.
CNA Financial Corporation
Statements of Cash Flows
Years ended December 31
(In millions)202220212020
Cash Flows from Operating Activities
Net income$894 $1,202 $690 
Adjustments to reconcile net income to net cash flows provided by operating activities:
Equity in net income of subsidiaries(993)(1,304)(812)
Dividends received from subsidiaries990 880 975 
Net investment losses— — 20 
Other, net28 33 26 
Net cash flows provided by operating activities919 811 899 
Cash Flows from Investing Activities
Change in short term investments114 (163)
Capital contributions to subsidiaries— — (1)
Other, net— — — 
Net cash flows provided (used) by investing activities114 (163)
Cash Flows from Financing Activities
Dividends paid to common stockholders(982)(621)(950)
Proceeds from the issuance of debt— — 495 
Repayment of debt— — (419)
Purchase of treasury stock(39)(18)(18)
Other, net(11)(8)(9)
Net cash flows used by financing activities(1,032)(647)(901)
Net change in cash(1)
Cash, beginning of year— 
Cash, end of year$$$— 
See accompanying Notes to Condensed Financial Information as well as the
Consolidated Financial Statements and accompanying Notes.
Notes to Condensed Financial Information
A. Summary of Significant Accounting Policies
Basis of Presentation
The condensed financial information of CNA Financial Corporation (CNAF or the Parent Company) should be read in conjunction with the Consolidated Financial Statements and Notes thereto included in Item 8 of this Form 10-K. CNAF’s subsidiaries are accounted for using the equity method of accounting. Equity in net income of these subsidiaries is presented on the Condensed Statements of Operations as Equity in net income of subsidiaries. Loews owned approximately 90% of the outstanding common stock of CNAF as of December 31, 2022.
v3.22.4
Schedule III. Supplementary Insurance Information
12 Months Ended
Dec. 31, 2022
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract]  
Schedule III. Supplementary Insurance Information SCHEDULE III. SUPPLEMENTARY INSURANCE INFORMATIONIncorporated herein by reference to Note O to the Consolidated Financial Statements included under Item 8.
v3.22.4
Schedule IV. Reinsurance
12 Months Ended
Dec. 31, 2022
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]  
Schedule IV. Reinsurance
SCHEDULE IV. REINSURANCE
Incorporated herein by reference to Note G to the Consolidated Financial Statements included under Item 8.
v3.22.4
Schedule V. Valuation and Qualifying Accounts
12 Months Ended
Dec. 31, 2022
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule V. Valuation and Qualifying Accounts
SCHEDULE V. VALUATION AND QUALIFYING ACCOUNTS
(In millions)Balance at Beginning of PeriodCharged to Costs and ExpensesCharged to Other AccountsDeductionsBalance at End of Period
Year ended December 31, 2022
Allowance for uncollectible:
Mortgage loan receivables
$16 $— $$— $24 
Insurance and reinsurance receivables$50 $$— $(7)$51 
Allowance for credit losses:
Fixed maturity securities
$18 $— $$(21)$
Year ended December 31, 2021
Allowance for uncollectible:
Mortgage loan receivables
$26 $— $(10)$— $16 
Insurance and reinsurance receivables$54 $$— $(8)$50 
Allowance for credit losses:
Fixed maturity securities
$40 $— $30 $(52)$18 
Year ended December 31, 2020
Allowance for uncollectible:
Mortgage loan receivables
$$— $19 $— $26 
Insurance and reinsurance receivables$57 $$— $(7)$54 
Allowance for credit losses:
Fixed maturity securities
$$— $92 $(58)$40 
Effects of foreign currency translation, changes in the estimate of the allowance for uncollectible mortgage loan receivables, increases in the estimate of the allowance for credit losses on fixed maturity securities and allowances established with respect to assets purchased with credit deterioration are presented within the Charged to Other Accounts column in the table above. Write-offs of uncollectible amounts and reductions to the allowance for credit losses due to securities sold during the period or the reversal for securities that had an allowance recorded in a previous period are presented within the Deductions column in the table above.
v3.22.4
Schedule VI. Supplemental Information Concerning Property and Casualty Insurance Operations
12 Months Ended
Dec. 31, 2022
SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters [Abstract]  
Schedule VI. Supplemental Information Concerning Property and Casualty Insurance Operations
SCHEDULE VI. SUPPLEMENTAL INFORMATION CONCERNING PROPERTY AND CASUALTY INSURANCE OPERATIONS
As of and for the years ended December 31Consolidated Property and Casualty Operations
(In millions)202220212020
Balance Sheet Data
Deferred acquisition costs$806 $737 
Reserves for unpaid claim and claim adjustment expenses25,099 24,174 
Discount deducted from claim and claim adjustment expense reserves above (based on interest rates ranging from 3.5% to 6.4%)
1,133 1,146 
Unearned premiums6,374 5,761 
Statement of Operations Data
Net written premiums$9,128 $8,405 $8,059 
Net earned premiums8,667 8,175 7,649 
Net investment income1,751 2,111 1,896 
Incurred claim and claim adjustment expenses related to current year6,243 5,970 5,793 
Incurred claim and claim adjustment expenses related to prior years(187)(104)(119)
Amortization of deferred acquisition costs1,490 1,443 1,410 
Paid claim and claim adjustment expenses5,261 4,844 5,164 
v3.22.4
Summary of Significant Accounting Policies (Policies)
12 Months Ended
Dec. 31, 2022
Accounting Policies [Abstract]  
Basis of Presentation The Consolidated Financial Statements include the accounts of CNA Financial Corporation (CNAF) and its subsidiaries. Collectively, CNAF and its subsidiaries are referred to as CNA or the Company. Loews Corporation (Loews) owned approximately 90% of the outstanding common stock of CNAF as of December 31, 2022.The accompanying Consolidated Financial Statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP). Intercompany amounts have been eliminated.
Use of Estimates The preparation of Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the Consolidated Financial Statements and the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates.
Accounting Standards Updates (ASU) Pending Adoption
Accounting Standards Updates (ASU) Pending Adoption
In August 2018, the FASB issued ASU 2018-12, Financial Services-Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts. The updated accounting guidance requires changes to the measurement and disclosure of long-duration contracts. For the Company, this includes the long term care business. Entities will be required to review, and update if there is a change, cash flow assumptions (including morbidity and persistency) at least annually, and to update discount rate assumptions quarterly using an upper-medium grade fixed-income instrument yield. The effect of changes in cash flow assumptions will be recorded in the Company's results of operations and the effect of changes in discount rate assumptions will be recorded in Other comprehensive income. The guidance is effective for interim and annual periods beginning after December 15, 2022, with early adoption permitted, and may be applied using either a modified retrospective transition method or a full retrospective transition method. Financial statements for prior periods presented shall be adjusted to reflect the effects of applying the new accounting guidance.
The Company will adopt the new guidance effective January 1, 2023, using the modified retrospective method applied as of the transition date of January 1, 2021. The Company will use a published spot rate curve constructed from A+, A and A- rated U.S. dollar denominated corporate bonds matched to the duration of the corresponding insurance liabilities, to calculate discount rates. The Company will group its long-duration contracts into calendar year cohorts based on the contract issue date.
The most significant impact at the transition date will be the effect of updating the discount rate assumption to reflect an upper-medium grade fixed-income instrument yield, which will be partially offset by the de-recognition of Shadow Adjustments associated with long-duration contracts. The Company expects the net impact of these changes will be a decrease of approximately $2.3 billion in Accumulated other comprehensive income (AOCI) as of the transition date of January 1, 2021. There is a minimal transition impact expected to retained earnings.
The requirement to review, and update if there is a change, cash flow assumptions at least annually is expected to change the pattern of earnings being recognized. Adoption will also significantly expand the Company’s disclosures, and will impact systems, processes, and controls. While the requirements of the new guidance represent a material change from existing GAAP, the new guidance will not impact capital and surplus under statutory accounting practices, cash flows, or the underlying economics of the business.
In December 2022, the FASB issued ASU 2022-05, Financial Services-Insurance (Topic 944): Transition for Sold Contracts. This guidance permits companies to make an election to exclude from the scope of ASU 2018-12 any insurance contracts that have been de-recognized prior to the effective date of ASU 2018-12, assuming that the company has no significant continuing involvement with the de-recognized contracts. In the fourth quarter of 2022, the Company novated its block of legacy annuity business, which was fully-ceded prior
to novation. The Company plans to elect the ASU 2022-05 transition relief, and will exclude the novated legacy annuity business from the scope of ASU 2018-12. The Company continues to make progress on its implementation activities and is in the process of reviewing restated results, and finalizing updates to internal controls associated with adoption of the new guidance.
Premiums Insurance premiums on property and casualty insurance contracts are recognized in proportion to the underlying risk insured and are principally earned ratably over the term of the policies. Premiums on long term care contracts are earned ratably over the policy year in which they are due. The reserve for unearned premiums represents the portion of premiums written relating to the unexpired terms of coverage.
Property and casualty contracts that are retrospectively rated or subject to audit premiums contain provisions that result in an adjustment to the initial policy premium depending on the contract provisions. These provisions stipulate the adjustment due to loss experience of the insured during the coverage period, or changes in the level of exposure to insurance risk. For such contracts, the Company estimates the amount of ultimate premiums that the Company may earn upon completion of the coverage period and recognizes either an asset or a liability for the difference between the initial policy premium and the estimated ultimate premium. The Company either adjusts such estimated ultimate premium amounts during the course of the coverage period based on actual results to date, or by conducting premium audits after the policy has expired to determine the final exposure to insured risks. The resulting adjustment is recorded as either a reduction of or an increase to the earned premiums for the period.
Insurance receivables include balances due currently or in the future, including amounts due from insureds related to paid losses under high deductible policies, and are presented at unpaid balances, net of an allowance for uncollectible receivables. A loss rate methodology is used to determine expected credit losses for premium receivables. This methodology uses the Company’s historical annual credit losses relative to gross premium written to develop a range of credit loss rates for each dollar of gross written premium underwritten. Additionally, an expected credit loss for amounts due from insureds under high deductible and retrospectively rated policies is calculated on a pool basis, informed by historical default rate data obtained from major rating agencies. Changes in the allowance are presented as a component of Other operating expenses on the Consolidated Statements of Operations. Amounts are considered past due based on policy payment terms. Insurance receivables and any related allowance are written off after collection efforts are exhausted or a negotiated settlement is reached. See the Credit Losses section of this note for additional information on the Company’s allowances for expected credit losses.
Claim and claim adjustment expense reserves Claim and claim adjustment expense reserves, except reserves for structured settlements not associated with asbestos and environmental pollution (A&EP), workers' compensation lifetime claims and long term care claims, are not discounted and are based on i) case basis estimates for losses reported on direct business, adjusted in the aggregate for ultimate loss expectations; ii) estimates of incurred but not reported (IBNR) losses; iii) estimates of losses on assumed reinsurance; iv) estimates of future expenses to be incurred in the settlement of claims; v) estimates of salvage and subrogation recoveries and vi) estimates of amounts due from insureds related to losses under high deductible policies. Management considers current conditions and trends as well as past Company and industry experience in establishing these estimates. The effects of inflation, which can be significant, are implicitly considered in the reserving process and are part of the recorded reserve balance. Ceded claim and claim adjustment expense reserves are reported as a component of Reinsurance receivables on the Consolidated Balance Sheets.
Future policy benefits reserves Future policy benefit reserves represent the active life reserves related to the Company's long term care policies for policyholders that are not currently receiving benefits and are computed using the net level premium method, which incorporates actuarial assumptions as to morbidity, persistency, inclusive of mortality, discount rate, future premium rate adjustments and expenses. Expense assumptions primarily relate to claim adjudication. These assumptions are locked in over the life of the policy; however if a premium deficiency emerges, the assumptions are unlocked and the future policy benefit reserves are increased. The September 30, 2022 gross premium valuation (GPV) indicated that recorded reserves included a margin of approximately $125 million.
Insurance-relate assessments Liabilities for insurance-related assessments are accrued when an assessment is probable, when it can be reasonably estimated and when the event obligating the entity to pay an imposed or probable assessment has occurred. Liabilities for insurance-related assessments are not discounted and are included as part of Other liabilities on the Consolidated Balance Sheets.
Reinsurance Reinsurance accounting allows for contractual cash flows to be reflected as premiums and losses. To qualify for reinsurance accounting, reinsurance agreements must include risk transfer. To meet risk transfer requirements, a reinsurance contract must include both insurance risk, consisting of underwriting and timing risk, and a reasonable possibility of a significant loss for the assuming entity.Reinsurance receivables related to paid losses are presented at unpaid balances. Reinsurance receivables related to unpaid losses are estimated in a manner consistent with claim and claim adjustment expense reserves or future policy benefit reserves. Reinsurance receivables are reported net of an allowance for uncollectible amounts on the Consolidated Balance Sheets. The cost of reinsurance is primarily accounted for over the life of the underlying reinsured policies using assumptions consistent with those used to account for the underlying policies or over the reinsurance contract period. The ceding of insurance does not discharge the primary liability of the Company.
The Company has established an allowance for uncollectible reinsurance receivables which relates to both amounts already billed on ceded paid losses as well as ceded reserves that will be billed when losses are paid in the future. For assessing expected credit losses, the Company separates reinsurance receivables into two pools: voluntary reinsurance receivables and involuntary receivables related to mandatory pools. The Company has not recorded an allowance for involuntary pools as there is no perceived credit risk. The principal credit quality indicator used in the valuation of the allowance on voluntary reinsurance receivables is the financial strength rating of the reinsurer sourced from major rating agencies. If the reinsurer is unrated, an internal financial strength rating is assigned based on the Company’s historical loss experience and the Company’s assessment of reinsurance counterparty risk profile, which generally corresponds with a B rating. Reinsurer financial strength ratings are updated and reviewed on an annual basis or sooner if the Company becomes aware of significant changes related to a reinsurer. The allowance for uncollectible reinsurance receivables is estimated on the basis of periodic evaluations of balances due from reinsurers, reinsurer financial strength rating and solvency, industry experience and current and forecast economic conditions. Because billed receivables generally approximate 5% or less of total reinsurance receivables, the age of the reinsurance receivables related to paid losses is not a significant input into the allowance analysis. Changes in the allowance for uncollectible reinsurance receivables are presented as a component of Insurance claims and policyholders' benefits on the Consolidated Statements of Operations. See the Credit Losses section of this note for additional information on the Company's allowances for expected credit losses.
Amounts are considered past due based on the reinsurance contract terms. Reinsurance receivables related to paid losses and any related allowance are written off after collection efforts have been exhausted or a negotiated settlement is reached with the reinsurer. Reinsurance receivables from insolvent insurers related to paid losses are written off when the settlement due from the estate can be reasonably estimated. At the time reinsurance receivables related to paid losses are written off, any required adjustment to reinsurance receivables related to unpaid losses is recorded as a component of Insurance claims and policyholders' benefits on the Consolidated Statements of Operations.
A loss portfolio transfer is a retroactive reinsurance contract. If the cumulative claim and allocated claim adjustment expenses ceded under a loss portfolio transfer exceed the consideration paid, the resulting gain from such excess is deferred and amortized into earnings in future periods in proportion to actual recoveries under the loss portfolio transfer. In any period in which there is a revised estimate of claim and allocated claim adjustment expenses and the loss portfolio transfer is in a gain position, the deferred gain is recalculated as if the revised estimate was available at the inception date of the loss portfolio transfer and the change in the deferred gain is recognized in earnings.
Deferred acquisition costs Deferrable acquisition costs include commissions, premium taxes and certain underwriting and policy issuance costs which are incremental direct costs of successful contract acquisitions. Acquisition costs related to property and casualty business are deferred and amortized ratably over the period the related premiums are earned. Deferred acquisition costs are presented net of ceding commissions and other ceded acquisition costs.The Company evaluates deferred acquisition costs for recoverability. Anticipated investment income is considered in the determination of the recoverability of deferred acquisition costs. Adjustments, if necessary, are recorded in current period results of operations.
Policyholder dividends Policyholder dividends are paid to participating policyholders within the workers' compensation and surety lines of business. Net written premiums for participating dividend policies were approximately 2%, 1% and 1% of total net written premiums for each of the years ended December 31, 2022, 2021 and 2020. Dividends to policyholders are accrued according to the Company's best estimate of the amount to be paid in accordance with contractual provisions and applicable state laws. Dividends to policyholders are presented as a component of Insurance claims & policyholders' benefits on the Consolidated Statements of Operations and Other liabilities on the Consolidated Balance Sheets.
Investments The Company classifies its fixed maturity securities as either available-for-sale or trading, and as such, they are carried at fair value. Changes in fair value of trading securities are reported within Net investment income on
the Consolidated Statements of Operations. Changes in fair value related to available-for-sale securities are reported as a component of Other comprehensive income.
The cost of fixed maturity securities classified as available-for-sale is adjusted for amortization of premiums and accretion of discounts, which are included in Net investment income on the Consolidated Statements of Operations. The amortization of premium and accretion of discount for fixed maturity securities takes into consideration call and maturity dates that produce the lowest yield.
For asset-backed securities included in fixed maturity securities, the Company recognizes income using an effective yield based on anticipated prepayments and the estimated economic life of the securities. When estimates of prepayments change, the effective yield is recalculated to reflect actual payments to date and anticipated future payments predominantly using the retrospective method.
To the extent that unrealized gains on fixed maturity securities supporting long term care reserves would result in a premium deficiency if realized, a related increase in Insurance reserves is recorded, net of tax, as a reduction of net unrealized gains (losses), through Other comprehensive income (loss). To the extent that unrealized gains or losses on fixed maturity securities supporting structured settlements not funded by annuities would impact the reserve balance if realized, a related increase or decrease in Insurance reserves is recorded, net of tax, as a reduction or increase of net unrealized gains (losses), through Other comprehensive income (Shadow Adjustments). Shadow Adjustments, net of tax, decreased $2,416 million and $296 million for the years ended December 31, 2022 and 2021, respectively. As of December 31, 2022 and 2021, net unrealized gains on investments included in AOCI were correspondingly reduced by Shadow Adjustments of $61 million and $2,477 million, respectively.
Equity securities are carried at fair value. The Company's non-redeemable preferred stock contain characteristics of debt securities, are priced similarly to bonds and are held primarily for income generation through periodic dividends. While recognition of gains and losses on these securities is not discretionary, management does not consider the changes in fair value of non-redeemable preferred stock to be reflective of our primary operations. As such, the changes in the fair value of these securities are recorded through Net investment gains (losses) on the Consolidated Statements of Operations. The Company owns certain common stock with the intention of holding the securities primarily for market appreciation and as such, the changes in the fair value of these securities are recorded through Net investment income.
The Company's carrying value of investments in limited partnerships is its share of the net asset value of each partnership, as determined by the general partner. Certain partnerships for which results are not available on a timely basis are reported on a lag, primarily three months or less. Changes in net asset values are accounted for under the equity method and recorded within Net investment income on the Consolidated Statements of Operations.
Mortgage loans are commercial in nature, are carried at unpaid principal balance, net of unamortized fees and an allowance for expected credit losses, and are recorded once funded. The allowance for expected credit losses is developed by assessing the credit quality of pools of mortgage loans in good standing using debt service coverage ratios (DSCR) and loan-to-value ratios (LTV). The DSCR compares a property’s net operating income to its debt service payments, including principal and interest. The LTV ratio compares the current unpaid principal balance of the loan to the estimated fair value of the underlying property collateralizing the loan. The pools developed to measure the credit loss allowance use increments of DSCR and LTV to draw distinctions between risk levels. The Company applies expected credit loss rates by pool to the outstanding receivable balances. Changes in the allowance for mortgage loans are presented as a component of Net investment gains (losses) on the Consolidated Statements of Operations. See the Credit Losses section of this note for additional information on the Company’s allowances for expected credit losses. Interest income from mortgage loans is recognized on an accrual basis using the effective yield method.
Other invested assets include overseas deposits. Overseas deposits are valued using the net asset value per share (or equivalent) practical expedient. They are primarily short-term government securities, agency securities and corporate bonds held in trusts that are managed by Lloyd's of London. These funds are required of Lloyd's syndicates to protect policyholders in overseas markets and may be denominated in local currency.
Short term investments are carried at fair value, with the exception of cash accounts earning interest, which are carried at cost and approximate fair value. Changes in fair value are reported as a component of Other comprehensive income.
Purchases and sales of all securities are recorded on the trade date, except for private placement securities, including bank loan participations, which are recorded once funded. Net investment gains and losses are determined on the basis of the cost or amortized cost of the specific securities sold.
Variable interest entities
In the normal course of investing activities, the Company enters into relationships with variable interest entities (VIEs), as both an investor in limited partnerships and asset-backed securities issued by third-party VIEs. The Company is not the primary beneficiary of these VIEs, and therefore does not consolidate them. The Company determines whether it is the primary beneficiary of a VIE based on a qualitative assessment of the relative power and benefits of the Company and the other participants in the VIE. The Company’s maximum exposure to loss with respect to these investments is limited to the investment carrying values included in the Company’s Consolidated Balance Sheets and any unfunded commitments.
An available-for-sale security is impaired if the fair value of the security is less than its cost adjusted for accretion, amortization and allowance for credit losses. When a security is impaired, it is evaluated to determine whether the Company intends to sell the security before recovery of amortized cost or whether a credit loss exists. Losses on securities that the Company intends to sell are recognized as impairment losses within Net investment gains (losses) on the Consolidated Statements of Operations. If a credit loss exists, an allowance is established and the corresponding amount is recognized as an impairment loss within Net investment gains (losses) on the Consolidated Statements of Operations. The allowance for credit losses related to available-for-sale fixed maturity securities is the difference between the present value of cash flows expected to be collected and the amortized cost basis, limited by the amount that the fair value is less than the amortized cost basis. In subsequent periods, the allowance is reviewed, with any changes in the allowance presented as a component of Net investment gains (losses) on the Consolidated Statements of Operations. Changes in the difference between the amortized cost basis, net of the allowance, and the fair value, are recognized in Other comprehensive income.
Impairments, other than temporary
Significant judgment is required in the determination of whether an impairment loss has occurred for a security. The Company follows a consistent and systematic process for determining and recording an impairment loss, including the evaluation of securities in an unrealized loss position and securities with an allowance for credit losses on at least a quarterly basis.
The Company’s assessment of whether an impairment loss has occurred incorporates both quantitative and qualitative information. A credit loss exists if the present value of cash flows expected to be collected is less than the amortized cost basis. Significant assumptions enter into these cash flow projections including delinquency rates, probable risk of default, loss severity upon a default, over collateralization and interest coverage triggers and credit support from lower level tranches. The Company considers all available evidence when determining whether an investment requires a credit loss write-down or allowance to be recorded. Examples of such evidence may include the financial condition and near-term and long-term prospects of the issuer, whether the issuer is current with interest and principal payments, credit ratings on the security or changes in ratings over time, general market conditions and industry, sector or other specific factors and whether it is likely that the Company will recover its amortized cost through the collection of cash flows. See the Credit Losses section of this note for additional information on the Company’s allowances for expected credit losses.
Credit Losses The allowances for credit losses on fixed maturity securities, mortgage loans, reinsurance receivables and insurance receivables are valuation accounts that are reported as a reduction of a financial asset’s cost basis and are measured on a pool basis when similar risk characteristics exist. Management estimates the allowance using relevant available information from both internal and external sources. Historical credit loss experience provides the basis for the estimation of expected credit losses and adjustments may be made to reflect current conditions and reasonable and supportable forecasts. Adjustments to historical loss information are made for any additional factors that come to the Company’s attention. This could include significant shifts in
counterparty financial strength ratings, aging of past due receivables, amounts sent to collection agencies, or other underlying portfolio changes. Amounts are considered past due when payments have not been received according to contractual terms. The Company also considers current and forecast economic conditions, using a variety of economic metrics and forecast indices. The sensitivity of expected credit losses relative to changes to these forecast economic conditions can vary by financial asset class. The Company considers a reasonable and supportable forecast period to be up to 24 months from the balance sheet date. After the forecast period, the Company reverts to historical credit experience. The Company uses collateral arrangements such as letters of credit and amounts held in beneficiary trusts to mitigate credit risk, which are considered in the estimate of net amount expected to be collected. Amounts are written off against the allowance when determined to be uncollectible.
The Company has made a policy election to present accrued interest balances separately from the amortized cost basis of assets and has elected the practical expedient to exclude the accrued interest from the tabular disclosures for mortgage loans and available-for-sale securities. The Company has elected not to estimate an allowance for credit losses on accrued interest receivable. The accrual of interest income is discontinued and the asset is placed on nonaccrual status within 90 days of the interest becoming delinquent. Interest accrued but not received for assets on nonaccrual status is reversed through investment income. Interest received for assets that are on nonaccrual status is recognized as payment is received. The asset is returned to accrual status when the principal and interest amounts contractually due are brought current and future payments are expected. Interest receivable is presented as a component of accrued investment income on the Consolidated Balance Sheet.
Deferred Non-Insurance Warranty Revenue and Acquisition Expense
Non-insurance warranty revenue is primarily generated from separately-priced service contracts that provide mechanical breakdown and other coverages to vehicle or consumer goods owners. The warranty contracts generally provide coverage from 1 month to 10 years. For warranty products where the Company acts as the principal in the transaction, Non-insurance warranty revenue is reported on a gross basis, with amounts paid by customers reported as Non-insurance warranty revenue and commissions paid to agents reported as Non-insurance warranty expense.
Non-insurance warranty revenue is reported net of any premiums related to contractual liability coverage issued by the Company's insurance operations. Additionally, the Company provides warranty administration services for dealer and manufacturer obligor warranty products, which include limited warranties and guaranteed asset protection waivers. The Company recognizes Non-insurance warranty revenue over the service period in proportion to the actuarially determined expected claims emergence pattern. Customers predominantly pay in full at the inception of the warranty contract. The liability for deferred revenue represents the unearned portion of revenue in advance of the Company's performance. The deferred revenue balance includes amounts which are refundable on a pro rata basis upon cancellation.
Dealers, retailers and agents earn commission for assisting the Company in obtaining non-insurance warranty contracts. Additionally, the Company utilizes third-parties to perform warranty administrator services for its consumer goods warranties. These costs, which are deferred and recorded as Deferred non-insurance warranty acquisition expense, are amortized to Non-insurance warranty expense consistent with how the related revenue is recognized. The Company evaluates deferred costs for recoverability including consideration of anticipated investment income. Adjustments to deferred costs, if necessary, are recorded in the current period results of operations.
Income Taxes The Company and its eligible subsidiaries (CNA Tax Group) are included in the consolidated federal income tax return of Loews and its eligible subsidiaries. The Company accounts for income taxes under the asset and liability method. Under the asset and liability method, deferred income taxes are recognized for temporary differences between the financial statement and tax return bases of assets and liabilities, based on enacted tax rates and other provisions of the tax law. The effect of a change in tax laws or rates on deferred tax assets and liabilities is recognized in income in the period in which such change is enacted. Future tax benefits are recognized to the extent that realization of such benefits is more likely than not, and a valuation allowance is established for any portion of a deferred tax asset that management believes will not be realized. The Company releases tax effects from AOCI utilizing the security-by-security approach for Net unrealized gains (losses) on investments with an allowance for credit losses and Net unrealized gains (losses) on other investments. For Pension and postretirement benefits, tax effects from AOCI are released at enacted tax rates based on the pre-tax adjustments to pension liabilities or assets recognized within Other comprehensive income.
Pension and Postretirement Benefits
The Company recognizes the overfunded or underfunded status of its defined benefit plans in Other assets or Other liabilities on the Consolidated Balance Sheets. Changes in funded status related to prior service costs and credits, and actuarial gains and losses arising from differences between actual experience and actuarial assumptions, are recognized in the year in which the changes occur through Other comprehensive income. Unrecognized actuarial gains and losses in excess of 10% of the greater of the beginning of the year projected benefit obligation or fair value of plan assets (the corridor) are amortized as a component of net periodic pension cost (benefit) over the average remaining life expectancy of the plan participants. Annual service cost, interest cost, expected return on plan assets, amortization of prior service costs and credits and amortization of actuarial gains and losses are recognized on the Consolidated Statements of Operations.
The vested benefit obligation for the CNA Retirement Plan is determined based on eligible compensation and accrued service for previously entitled employees. Effective June 30, 2015, future benefit accruals under the CNA Retirement Plan were eliminated and the benefit obligations were frozen.
Stock-Based Compensation The Company records compensation expense using the fair value method for all awards it grants, modifies or cancels primarily on a straight-line basis over the requisite service period, generally three years.
Foreign Currency The Company's foreign subsidiaries' balance sheet accounts are translated at the exchange rates in effect at each reporting date and income statement accounts are either translated at the exchange rates on the date of the transaction or at average exchange rates. Foreign currency translation gains and losses are reflected in Stockholders' equity as a component of AOCI.
Leases A lease provides the lessee the right to control the use of an identified asset for a period of time in exchange for consideration. Operating lease right-of-use (ROU) assets and lease liabilities are included in Other assets and Other liabilities on the Company's Consolidated Balance Sheets.ROU assets represent the Company's right to use an underlying asset for the lease term and operating lease liabilities represent the Company's obligation to make lease payments arising from the lease. The Company determines if an arrangement is a lease at inception. Operating lease ROU assets and liabilities are recognized at the lease commencement date based on the present value of lease payments over the lease term. Most operating leases contain renewal options that provide for rent increases based on prevailing market conditions. Certain leases contain options to terminate before maturity. The lease term used to calculate the ROU asset includes any renewal options or lease termination options that the Company expects to exercise. The discount rate used to determine the commencement date present value of lease payments is typically the Company’s secured borrowing rate, as most of the Company’s leases do not provide an implicit rate. ROU assets include any lease payments required to be made prior to commencement and exclude lease incentives. The Company has elected to account for its lease and non-lease components as a single lease component. The Company’s non-lease components consist of variable lease costs not based on an index or rate and are excluded from the measurement of ROU assets and lease liabilities. Variable lease costs not based on an index or rate are treated as period costs, and represent charges for services provided by the landlord and the Company's reimbursement to the landlord for costs such as real estate taxes and insurance.
Property and Equipment Property and equipment are carried at cost less accumulated depreciation. Depreciation is based on the estimated useful lives of the various classes of property and equipment and is determined principally on the straight-line method. Furniture and fixtures are depreciated over seven years. Office equipment is depreciated over five years. The estimated lives for data processing equipment and software generally range from three to five years, but can be as long as ten years. Leasehold improvements are depreciated over the corresponding lease terms not to exceed the underlying asset life.
Goodwill
Goodwill represents the excess of purchase price over the fair value of the net assets of acquired entities and businesses. Goodwill in the International segment may change from period to period as a result of foreign currency translation.
Goodwill is tested for impairment annually or when certain triggering events require such tests. As a result of reviews completed for the year ended December 31, 2022, the Company determined that the estimated fair value of the reporting units were in excess of their carrying value including Goodwill. Changes in future periods in assumptions about the level of economic capital, business growth, earnings projections or the weighted average cost of capital could result in goodwill impairment.
Other Intangible Assets Other intangible assets are reported within Other assets on the Consolidated Balance Sheets. Finite-lived intangible assets are amortized over their estimated useful lives. Indefinite-lived other intangible assets are tested for impairment annually or when certain triggering events require such tests.
Earnings (Loss) Per Share Data Earnings (loss) per share is based on weighted average number of outstanding common shares. Basic earnings (loss) per share excludes the impact of dilutive securities and is computed by dividing Net income (loss) by the weighted average number of common shares outstanding for the period. Diluted earnings (loss) per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock.
v3.22.4
Investments (Tables)
12 Months Ended
Dec. 31, 2022
Investments [Abstract]  
Net investment income
The significant components of Net investment income are presented in the following table.
Years ended December 31
(In millions)202220212020
Fixed maturity securities$1,787 $1,707 $1,728 
Equity securities23 83 65 
Limited partnership investments(12)362 121 
Mortgage loans54 61 57 
Short term investments16 
Trading portfolio18 
Other— 
Gross investment income1,877 2,223 1,999 
Investment expense(72)(64)(64)
Net investment income$1,805 $2,159 $1,935 
Net investment income (loss) recognized due to the change in fair value of common stock held as of December 31, 2022, 2021 and 2020$47 $28 $34 
Net realized investment gains (losses)
Net investment gains (losses) are presented in the following table.
Years ended December 31
(In millions)202220212020
Net investment gains (losses):
Fixed maturity securities:
Gross gains$120 $186 $220 
Gross losses(261)(90)(220)
Net investment gains (losses) on fixed maturity securities(141)96 — 
Equity securities(116)(3)
Derivatives64 (10)
Mortgage loans(8)10 (21)
Short term investments and other(20)
Net investment gains (losses)$(199)$120 $(54)
Net investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock held as of December 31, 2022, 2021 and 2020$(75)$$(3)
Components of net other than temporary impairment losses recognized in earnings by asset type The table includes losses (gains) on securities with an intention to sell and changes in the allowance for credit losses on securities since acquisition date.
Years ended December 31
(In millions)202220212020
Fixed maturity securities available-for-sale:
Corporate and other bonds$62 $11 $87 
Asset-backed— 20 24 
Impairment losses (gains) recognized in earnings$62 $31 $111 
Summary of fixed maturity securities
The following tables present a summary of fixed maturity securities.
December 31, 2022Cost or
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Allowance for Credit LossesEstimated
Fair
Value
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds$23,137 $301 $2,009 $— $21,429 
States, municipalities and political subdivisions8,918 338 939 — 8,317 
Asset-backed:
Residential mortgage-backed3,073 447 — 2,631 
Commercial mortgage-backed1,886 255 — 1,635 
Other asset-backed3,287 361 2,927 
Total asset-backed8,246 11 1,063 7,193 
U.S. Treasury and obligations of government-sponsored enterprises111 — 110 
Foreign government617 43 — 575 
   Redeemable preferred stock— — — 
Total fixed maturity securities available-for-sale41,032 652 4,056 37,627 
Total fixed maturity securities trading— — — — — 
Total fixed maturity securities$41,032 $652 $4,056 $$37,627 
December 31, 2021Cost or
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Allowance for Credit LossesEstimated
Fair
Value
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds$21,444 $2,755 $56 $11 $24,132 
States, municipalities and political subdivisions10,358 1,599 14 — 11,943 
Asset-backed:
Residential mortgage-backed2,893 71 — 2,956 
Commercial mortgage-backed1,987 63 19 — 2,031 
Other asset-backed2,561 54 10 2,598 
Total asset-backed7,441 188 37 7,585 
U.S. Treasury and obligations of government-sponsored enterprises132 — 130 
Foreign government570 15 — 583 
Redeemable preferred stock— — — — — 
Total fixed maturity securities available-for-sale39,945 4,558 112 18 44,373 
Total fixed maturity securities trading— — — 
Total fixed maturity securities$39,952 $4,558 $112 $18 $44,380 
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value
The following tables present the estimated fair value and gross unrealized losses of fixed maturity securities in a gross unrealized loss position for which an allowance for credit loss has not been recorded, by the length of time in which the securities have continuously been in that position.
Less than 12 Months12 Months or LongerTotal
December 31, 2022Estimated
Fair Value
Gross
Unrealized
Losses
Estimated
Fair Value
Gross
Unrealized
Losses
Estimated
Fair Value
Gross
Unrealized
Losses
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds$15,946 $1,585 $1,634 $424 $17,580 $2,009 
States, municipalities and political subdivisions4,079 769 456 170 4,535 939 
Asset-backed:
Residential mortgage-backed1,406 144 1,143 303 2,549 447 
Commercial mortgage-backed1,167 159 408 96 1,575 255 
Other asset-backed2,087 262 542 99 2,629 361 
Total asset-backed4,660 565 2,093 498 6,753 1,063 
U.S. Treasury and obligations of government-sponsored enterprises76 16 92 
Foreign government473 26 78 17 551 43 
Total$25,234 $2,946 $4,277 $1,110 $29,511 $4,056 
Less than 12 Months12 Months or LongerTotal
December 31, 2021Estimated
Fair Value
Gross
Unrealized
Losses
Estimated
Fair Value
Gross
Unrealized
Losses
Estimated
Fair Value
Gross
Unrealized
Losses
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds$2,389 $48 $136 $$2,525 $56 
States, municipalities and political subdivisions730 14 — — 730 14 
Asset-backed:
Residential mortgage-backed1,043 — — 1,043 
Commercial mortgage-backed527 167 12 694 19 
Other asset-backed840 10 62 — 902 10 
Total asset-backed2,410 25 229 12 2,639 37 
U.S. Treasury and obligations of government-sponsored enterprises69 — 74 
   Foreign government97 — — 97 
Total$5,695 $92 $370 $20 $6,065 $112 
The following table presents the estimated fair value and gross unrealized losses of fixed maturity securities in a gross unrealized loss position for which an allowance for credit loss has not been recorded, by ratings distribution.
December 31, 2022December 31, 2021

(In millions)
Estimated Fair ValueGross Unrealized LossesEstimated Fair ValueGross Unrealized Losses
U.S. Government, Government agencies and Government-sponsored enterprises$2,355 $337 $898 $
AAA1,559 298 368 
AA 4,327 817 875 17 
A6,615 749 1,516 23 
BBB13,226 1,621 1,812 42 
Non-investment grade1,429 234 596 16 
Total$29,511 $4,056 $6,065 $112 
Debt securities, available-for-sale, allowance for credit loss Accrued interest receivable on available-for-sale fixed maturity securities totaled $394 million and $369 million as of December 31, 2022 and 2021 and is excluded from the estimate of expected credit losses and the amortized cost basis in the table included within this Note.
(In millions)Corporate and other bondsAsset-backedTotal
Allowance for credit losses:
Balance as of January 1, 2022$11 $$18 
Additions to the allowance for credit losses:
Securities for which credit losses were not previously recorded— — — 
Available-for-sale securities accounted for as PCD assets— 
Reductions to the allowance for credit losses:
Securities sold during the period (realized)— — — 
Write-offs charged against the allowance12 — 12 
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period(9)(8)
Balance as of December 31, 2022
$— $$
(In millions)Corporate and other bondsAsset-backedTotal
Allowance for credit losses:
Balance as of January 1, 2021$23 $17 $40 
Additions to the allowance for credit losses:
Securities for which credit losses were not previously recorded14 — 14 
Available-for-sale securities accounted for as PCD assets11 
Reductions to the allowance for credit losses:
Securities sold during the period (realized)17 24 
Write-offs charged against the allowance16 — 16 
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period(8)(7)
Balance as of December 31, 2021
$11 $$18 
Contractual maturity
The following table presents available-for-sale fixed maturity securities by contractual maturity.
December 3120222021
(In millions)Cost or
Amortized
Cost
Estimated
Fair
Value
Cost or
Amortized
Cost
Estimated
Fair
Value
Due in one year or less$1,012 $1,001 $1,603 $1,624 
Due after one year through five years9,880 9,399 10,637 11,229 
Due after five years through ten years13,788 12,453 13,294 14,338 
Due after ten years16,352 14,774 14,411 17,182 
Total$41,032 $37,627 $39,945 $44,373 
Financing receivable credit quality indicators
The following table presents the amortized cost basis of mortgage loans for each credit quality indicator by year of origination.
December 31, 2022
Mortgage Loans Amortized Cost Basis by Origination Year (1)
(In millions)20222021202020192018PriorTotal
DSCR ≥1.6x
LTV less than 55%$$13 $112 $41 $53 $255 $483 
LTV 55% to 65%13 — — — — — 13
LTV greater than 65%18 11 — — — — 29
DSCR 1.2x - 1.6x
LTV less than 55%49 18 43 10 37 162
LTV 55% to 65%86 — 20 — — 114
LTV greater than 65%15 — — — — — 15
DSCR ≤1.2
LTV less than 55%35 — — 57 — — 92
LTV 55% to 65%41 21 — 38 — — 100
LTV greater than 65%27 — — 22 — 56
Total$249 $94 $150 $201 $63 $307 $1,064 
(1) The values in the table above reflect DSCR on a standardized amortization period and LTV based on the most recent appraised values trended forward using changes in a commercial real estate price index.
v3.22.4
Fair Value (Tables)
12 Months Ended
Dec. 31, 2022
Fair Value Disclosures [Abstract]  
Assets and liabilities measured at fair value on a recurring basis
Assets and liabilities measured at fair value on a recurring basis are presented in the following tables. Corporate bonds and other includes obligations of the U.S. Treasury, government-sponsored enterprises, foreign governments and redeemable preferred stock.
December 31, 2022   Total
Assets/Liabilities
at Fair Value
(In millions)Level 1Level 2Level 3
Assets    
Fixed maturity securities:    
Corporate bonds and other$120 $21,187 $810 $22,117 
States, municipalities and political subdivisions— 8,274 43 8,317 
Asset-backed— 6,405 788 7,193 
Total fixed maturity securities 120 35,866 1,641 37,627 
Equity securities:
Common stock150 — 35 185 
Non-redeemable preferred stock54 435 — 489 
Total equity securities204 435 35 674 
Short term and other1,608 71 — 1,679 
Total assets$1,932 $36,372 $1,676 $39,980 
Liabilities
Other liabilities$— $$— $
Total liabilities$— $$— $

December 31, 2021   Total
Assets/Liabilities
at Fair Value
(In millions)Level 1Level 2Level 3
Assets    
Fixed maturity securities:    
Corporate bonds and other$140 $23,775 $937 $24,852 
States, municipalities and political subdivisions— 11,887 56 11,943 
Asset-backed— 7,029 556 7,585 
Total fixed maturity securities 140 42,691 1,549 44,380 
Equity securities:
Common stock220 — 13 233 
Non-redeemable preferred stock65 721 16 802 
Total equity securities285 721 29 1,035 
Short term and other1,798 74 — 1,872 
Total assets$2,223 $43,486 $1,578 $47,287 
Liabilities  
Other liabilities$— $12 $— $12 
Total liabilities$— $12 $— $12 
Table of reconciliation for assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs
The tables below present a reconciliation for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3).
Level 3
(In millions)
Corporate bonds and otherStates, municipalities and political subdivisionsAsset-backedEquity securitiesTotal
Balance as of January 1, 2022$937 $56 $556 $29 $1,578 
Total realized and unrealized investment gains (losses):
Reported in Net investment gains (losses)(2)— (6)
Reported in Net investment income— 16 (3)14 
Reported in Other comprehensive income (loss)(184)(13)(126)— (323)
Total realized and unrealized investment gains (losses)(185)(13)(101)(9)(308)
Purchases137 — 424 19 580 
Sales(5)— (2)(3)(10)
Settlements(84)— (70)(145)
Transfers into Level 310 — 75 — 85 
Transfers out of Level 3— — (94)(10)(104)
Balance as of December 31, 2022$810 $43 $788 $35 $1,676 
Unrealized gains (losses) on Level 3 assets and liabilities held as of December 31, 2022 recognized in Net income (loss) in the period$— $— $— $(4)$(4)
Unrealized gains (losses) on Level 3 assets and liabilities held as of December 31, 2022 recognized in Other comprehensive income (loss) in the period(183)(13)(125)— (321)

Level 3
(In millions)
Corporate bonds and otherStates, municipalities and political subdivisionsAsset-backedEquity securitiesTotal
Balance as of January 1, 2021$770 $46 $308 $27 $1,151 
Total realized and unrealized investment gains (losses):
Reported in Net investment gains (losses)(10)— — (2)(12)
Reported in Net investment income— — 
Reported in Other comprehensive income (loss)(32)(1)(10)— (43)
Total realized and unrealized investment gains (losses)(42)(1)(3)— (46)
Purchases312 12 287 612 
Sales(3)— (9)(20)(32)
Settlements(68)(1)(61)— (130)
Transfers into Level 320 — 109 21 150 
Transfers out of Level 3(52)— (75)— (127)
Balance as of December 31, 2021$937 $56 $556 $29 $1,578 
Unrealized gains (losses) on Level 3 assets and liabilities held as of December 31, 2021 recognized in Net income (loss) in the period$— $— $— $(2)$(2)
Unrealized gains (losses) on Level 3 assets and liabilities held as of December 31, 2021 recognized in Other comprehensive income (loss) in the period(32)(1)(11)— (44)
Quantitative information about significant unobservable inputs in the fair value measurement of level 3 assets
The following tables present quantitative information about the significant unobservable inputs utilized by the Company in the fair value measurements of Level 3 assets. Valuations for assets and liabilities not presented in the tables below are primarily based on broker/dealer quotes for which there is a lack of transparency as to inputs used to develop the valuations. The quantitative detail of these unobservable inputs is neither provided nor reasonably available to the Company. The weighted average rate is calculated based on fair value.
December 31, 2022Estimated Fair Value
(In millions)
Valuation Technique(s)Unobservable Input(s)Range
 (Weighted Average)
Fixed maturity securities$1,177 Discounted cash flowCredit spread
1% - 8% (2%)
December 31, 2021Estimated Fair Value
(In millions)
Valuation Technique(s)Unobservable Input(s)Range
 (Weighted Average)
Fixed maturity securities$1,225 Discounted cash flowCredit spread
1% - 7% (2%)
Carrying amount and estimated fair value of financial instrument assets and liabilities not measured at fair value
The carrying amount and estimated fair value of the Company's financial assets and liabilities which are not measured at fair value on the Consolidated Balance Sheets are presented in the following tables.
December 31, 2022Carrying
Amount
Estimated Fair Value
(In millions)Level 1Level 2Level 3Total
Assets
Mortgage loans$1,040 $— $— $973 $973 
Liabilities
Short term debt$243 $— $248 $— $248 
Long term debt2,538 — 2,349 — 2,349 
December 31, 2021Carrying
Amount
Estimated Fair Value
(In millions)Level 1Level 2Level 3Total
Assets
Mortgage loans$973 $— $— $1,018 $1,018 
Liabilities
Short term debt$— $— $— $— $— 
Long term debt2,779 — 2,978 — 2,978 
v3.22.4
Income Taxes (Tables)
12 Months Ended
Dec. 31, 2022
Income Tax Disclosure [Abstract]  
Reconciliation between the Company's federal income tax (expense) benefit at statutory rates and the recorded income tax (expense) benefit
The following table presents a reconciliation between the Company's income tax expense at statutory rates and the recorded income tax expense.
Years ended December 31
(In millions)202220212020
Income tax expense at statutory rates$(227)$(312)$(172)
Tax benefit from tax exempt income41 51 52 
Foreign taxes and credits15 (3)
State income tax expense(10)(13)(6)
Other tax expense(6)(5)(7)
Income tax expense$(187)$(282)$(131)
Current and deferred components of the Company's income tax (expense) benefit
The following table presents the current and deferred components of the Company's income tax expense.
Years ended December 31
(In millions)202220212020
Current tax expense$(221)$(235)$(180)
Deferred tax benefit (expense) 34 (47)49 
Total income tax expense$(187)$(282)$(131)
Significant components of the Company's deferred tax assets and liabilities
The deferred tax effects of the significant components of the Company's deferred tax assets and liabilities are presented in the following table.
December 31
(In millions)20222021
Deferred Tax Assets:
Insurance reserves:
Property and casualty claim and claim adjustment expense reserves$188 $173 
Unearned premium reserves190 193 
Deferred Revenue64 64 
Employee benefits35 46 
Deferred retroactive reinsurance benefit89 90 
Net unrealized losses706 — 
Other assets116 88 
Gross deferred tax assets1,388 654 
Deferred Tax Liabilities:
Investment valuation differences59 93 
Deferred acquisition costs113 99 
Net unrealized gains— 272 
Software and hardware21 27 
Other liabilities17 21 
Gross deferred tax liabilities210 512 
Net deferred tax asset$1,178 $142 
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Tables)
12 Months Ended
Dec. 31, 2022
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration insurance contracts, reconciliation of claims development to liability
The table below reconciles the net liability for unpaid claim and claim adjustment expenses to the amount presented on the Consolidated Balance Sheets.
As of December 31
(In millions)2022
Net liability for unpaid claim and claim adjustment expenses:
Specialty$5,563 
Commercial8,430 
International2,003 
Life & Group (1)
3,573 
Corporate & Other339 
Total net claim and claim adjustment expenses19,908 
Reinsurance receivables: (2)
Specialty1,315 
Commercial965 
International400 
Life & Group101 
Corporate & Other (3)
2,410 
Total reinsurance receivables5,191 
Total gross liability for unpaid claim and claim adjustment expenses$25,099 
(1) The Life & Group segment amounts are primarily related to long term care claim reserves for policyholders on claim, but also include amounts related to unfunded structured settlements arising from short-duration contracts. Long term care policies are long-duration contracts.
(2) Reinsurance receivables presented are gross of the allowance for uncollectible reinsurance and do not include reinsurance receivables related to paid losses.
(3) The Corporate & Other Reinsurance receivables are primarily related to A&EP claims covered under the Loss Portfolio Transfer (LPT).
Schedule of liability for unpaid claims and claims adjustment expense
The following table presents a reconciliation between beginning and ending claim and claim adjustment expense reserves, including claim and claim adjustment expense reserves of the Life & Group segment.
As of or for the years ended December 31
(In millions)202220212020
Reserves, beginning of year:
Gross$24,174 $22,706 $21,720 
Ceded4,969 4,005 3,835 
Net reserves, beginning of year19,205 18,701 17,885 
Reduction of net reserves due to Excess Workers' Compensation Loss Portfolio Transfer— (632)— 
Net incurred claim and claim adjustment expenses:
Provision for insured events of current year6,243 5,970 5,793 
Increase (decrease) in provision for insured events of prior years(187)(104)(119)
Amortization of discount170 174 183 
Total net incurred (1)
6,226 6,040 5,857 
Net payments attributable to:
Current year events(913)(1,014)(948)
Prior year events(4,348)(3,830)(4,216)
Total net payments(5,261)(4,844)(5,164)
Foreign currency translation adjustment and other(262)(60)123 
Net reserves, end of year19,908 19,205 18,701 
Ceded reserves, end of year5,191 4,969 4,005 
Gross reserves, end of year$25,099 $24,174 $22,706 
(1) Total net incurred above does not agree to Insurance claims and policyholders' benefits as reflected on the Consolidated Statements of Operations due to amounts related to retroactive reinsurance deferred gain accounting, the loss on the Excess Workers' Compensation LPT, uncollectible reinsurance and benefit expenses related to future policy benefits, which are not reflected in the table above.
Gross and net carried claim and claim adjustment expense reserves
The following tables present the gross and net carried reserves.
December 31, 2022 Specialty CommercialInternationalLife & GroupCorporate & OtherTotal
(In millions)
Gross Case Reserves$1,529 $3,156 $817 $3,457 $1,428 $10,387 
Gross IBNR Reserves5,349 6,239 1,586 217 1,321 14,712 
Total Gross Carried Claim and Claim Adjustment Expense Reserves$6,878 $9,395 $2,403 $3,674 $2,749 $25,099 
Net Case Reserves$1,310 $2,809 $686 $3,377 $137 $8,319 
Net IBNR Reserves4,253 5,621 1,317 196 202 11,589 
Total Net Carried Claim and Claim Adjustment Expense Reserves$5,563 $8,430 $2,003 $3,573 $339 $19,908 
December 31, 2021 Specialty CommercialInternationalLife & GroupCorporate & OtherTotal
(In millions)
Gross Case Reserves$1,578 $3,184 $859 $3,383 $1,551 $10,555 
Gross IBNR Reserves4,855 5,706 1,421 371 1,266 13,619 
Total Gross Carried Claim and Claim Adjustment Expense Reserves$6,433 $8,890 $2,280 $3,754 $2,817 $24,174 
Net Case Reserves$1,338 $2,850 $744 $3,291 $146 $8,369 
Net IBNR Reserves3,927 5,215 1,196 350 148 10,836 
Total Net Carried Claim and Claim Adjustment Expense Reserves$5,265 $8,065 $1,940 $3,641 $294 $19,205 
Net prior year development The following table presents development recorded for the Specialty, Commercial, International and Corporate & Other segments.
Years ended December 31
(In millions)202220212020
Pretax (favorable) unfavorable development:
Specialty$(40)$(45)$(61)
Commercial(43)(6)(7)
International(13)(2)
Corporate & Other64 6050 
Total pretax (favorable) unfavorable development$(32)$11 $(20)
Impact of loss portfolio transfer on the consolidated statement of operations
The following table presents the impact of the Loss Portfolio Transfer on the Consolidated Statements of Operations.
Years ended December 31
(In millions)202220212020
Additional amounts ceded under LPT:
Net A&EP adverse development before consideration of LPT$92 $143 $125 
Provision for uncollectible third-party reinsurance on A&EP(5)(5)(25)
Total additional amounts ceded under LPT87 138 100 
Retroactive reinsurance benefit recognized(91)(107)(94)
Pretax impact of deferred retroactive reinsurance$(4)$31 $
Specialty  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration insurance contracts, reconciliation of claims development to liability
The table below provides the line of business composition of the net liability for unpaid claim and claim adjustment expenses for the Specialty segment.
As of December 31
(In millions)2022
Net liability for unpaid claim and claim adjustment expenses:
Medical Professional Liability$1,526 
Other Professional Liability and Management Liability3,514 
Surety396 
Warranty50 
Other77 
Total net liability for unpaid claim and claim adjustment expenses$5,563 
Net prior year claim and allocated claim adjustment expense reserve development
The following table presents further detail of the development recorded for the Specialty segment.
Years ended December 31
(In millions)202220212020
Pretax (favorable) unfavorable development:
Medical Professional Liability$18 $23 $35 
Other Professional Liability and Management Liability50 24 (15)
Surety(83)(73)(69)
Warranty(21)(14)(7)
Other(4)(5)(5)
Total pretax (favorable) unfavorable development$(40)$(45)$(61)
Commercial  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration insurance contracts, reconciliation of claims development to liability
The table below provides the line of business composition of the net liability for unpaid claim and claim adjustment expenses for the Commercial segment.
As of December 31
(In millions)2022
Net Claim and claim adjustment expenses:
Commercial Auto$787 
General Liability3,206 
Workers' Compensation3,739 
Property and Other698 
Total net liability for claim and claim adjustment expenses$8,430 
Net prior year claim and allocated claim adjustment expense reserve development
The following table presents further detail of the development recorded for the Commercial segment.
Years ended December 31
(In millions)202220212020
Pretax (favorable) unfavorable development:
Commercial Auto$49 $53 $33 
General Liability67 15 15 
Workers' Compensation(152)(82)(96)
Property and Other(7)41 
Total pretax (favorable) unfavorable development$(43)$(6)$(7)
International  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration insurance contracts, reconciliation of claims development to liability
The table below provides the composition of the net liability for unpaid claim and claim adjustment expenses for the International segment.
As of December 31
(In millions)2022
Net Claim and claim adjustment expenses:
International excluding Hardy$1,441 
Hardy562 
Total net liability for claim and claim adjustment expenses$2,003 
Net prior year claim and allocated claim adjustment expense reserve development
The following table presents further detail of the development recorded for the International segment.
Years ended December 31
(In millions)2022
2021 (1)
2020 (1)
Pretax (favorable) unfavorable development:
Commercial$(10)$(35)$(2)
Specialty(4)36 
Other(3)
Total pretax (favorable) unfavorable development $(13)$$(2)
(1) Effective December 31, 2021 the International lines of business were consolidated to align with domestic operations. Prior period information has been conformed to the new line of business presentation.
CNAF Consolidated  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Schedule of historical claims duration
The table below presents information about average historical claims duration as of December 31, 2022 and is presented as required supplementary information, which is unaudited.
Average Annual Percentage Payout of Ultimate Net Incurred Claim and Allocated Claim Adjustment Expenses in Year:
12345678910
Specialty
Medical Professional Liability3.6 %17.0 %23.0 %18.0 %11.9 %8.2 %4.7 %2.3 %1.0 %0.9 %
Other Professional Liability and Management Liability6.6 %21.0 %20.7 %16.2 %10.3 %6.0 %4.3 %4.8 %1.4 %0.5 %
Surety(1)
19.0 %40.5 %20.2 %3.6 %2.1 %4.8 %(1.7)%0.4 %(0.6)%— %
Commercial
Commercial Auto26.1 %22.0 %17.6 %13.9 %10.4 %4.8 %1.7 %0.5 %— %— %
General Liability3.9 %13.7 %17.1 %18.8 %14.3 %9.4 %5.7 %4.6 %2.1 %0.6 %
Workers' Compensation15.3 %22.3 %13.7 %9.4 %6.1 %2.3 %1.1 %1.4 %1.0 %1.1 %
International
International - Excluding Hardy18.3 %22.5 %10.4 %7.1 %6.0 %6.2 %6.7 %2.9 %2.5 %1.3 %
International - Hardy19.7 %34.0 %13.4 %7.0 %4.4 %3.9 %0.6 %2.1 %1.0 %0.7 %
(1) Due to the nature of the Surety business, average annual percentage payout of ultimate net incurred claim and allocated claim adjustment expenses has been calculated using only the payouts of mature accident years presented in the loss reserve development tables.
Hardy | International  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration contracts net incurred claims and allocated claim adjustment expenses
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$127 $143 $136 $137 $138 $141 $142 $142 $141 $144 $7,904 
2014182 180 173 167 168 169 167 165 164 (4)8,530 
2015186 175 174 174 172 174 175 177 (2)9,722 
2016224 240 231 220 222 215 216 10,834 
2017240 248 241 242 249 249 13,204 
2018264 295 298 303 303 26 15,185 
2019216 219 214 221 37 11,374 
2020206 197 191 62 6,699 
2021174 164 83 3,384 
2022187 136 1,279 
Total$2,016 $349 
Short-duration contracts net cumulative paid claim adjustment expenses reconciliation of total liability for unpaid claim and claim adjustment expense
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$37 $99 $119 $125 $129 $131 $135 $136 $138 $139 
201455 121 139 148 153 159 160 161 162 
201529 96 127 142 153 161 159 168 
201662 143 169 178 191 202 202 
201752 149 181 203 210 222 
201854 170 198 229 246 
201943 101 138 155 
202027 76 102 
202113 43 
202223 
Total$1,462 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$554 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013— 
Liability for unallocated claim adjustment expenses for accident years presented
Total net liability for unpaid claim and claim adjustment expenses$562 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Total(2)
Accident Year
2013$16 $(7)$$$$$— $(1)$$17 
2014(2)(7)(6)(2)(2)(1)(18)
2015(11)(1)— (2)(9)
201616 (9)(11)(7)(8)
2017(7)— 
201831 — 39 
2019(5)
2020(9)(6)(15)
2021(10)(10)
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
(2) The amounts included in the loss reserve development tables above are presented at the year-end 2022 foreign currency exchange rates for all periods presented to remove the effects of foreign currency exchange rate fluctuations between calendar years. The amounts included within the table on page 102 presenting the detail of the development recorded within the International segment include the impact of fluctuations in foreign currency exchange rates.
Medical Professional Liability | Specialty  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration contracts net incurred claims and allocated claim adjustment expenses
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$462 $479 $500 $513 $525 $535 $545 $531 $530 $530 $19,587 
2014450 489 537 530 535 529 527 524 527 12 19,818 
2015433 499 510 494 488 510 501 498 22 18,203 
2016427 487 485 499 508 510 508 12 16,136 
2017412 449 458 460 455 460 30 15,288 
2018404 429 431 448 470 31 15,163 
2019430 445 458 471 101 14,189 
2020477 476 455 226 10,679 
2021377 376 259 8,801 
2022329 290 6,717 
Total$4,624 $988 
Short-duration contracts net cumulative paid claim adjustment expenses reconciliation of total liability for unpaid claim and claim adjustment expense Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$17 $119 $255 $355 $414 $462 $495 $508 $512 $517 
201423 136 258 359 417 472 489 497 504 
201522 101 230 313 384 420 444 458 
201618 121 246 339 401 436 460 
201719 107 235 308 355 388 
201821 115 211 290 349 
201917 91 183 280 
202011 61 139 
202111 49 
202210 
Total$3,154 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$1,470 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201325 
Liability for unallocated claim adjustment expenses for accident years presented31 
Total net liability for unpaid claim and claim adjustment expenses$1,526 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022Total
Accident Year
2013$17 $21 $13 $12 $10 $10 $(14)$(1)$— $68 
201439 48 (7)(6)(2)(3)77 
201566 11 (16)(6)22 (9)(3)65 
201660 (2)14 (2)81 
201737 (5)48 
201825 17 22 66 
201915 13 13 41 
2020(1)(21)(22)
2021(1)(1)
Total net development for the accident years presented above34 13 16 
Total net development for accident years prior to 2013(3)
Total unallocated claim adjustment expense development— 
Total$35 $23 $18 
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
Other Professional Liability and Management Liability | Specialty  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration contracts net incurred claims and allocated claim adjustment expenses
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$884 $894 $926 $885 $866 $863 $850 $846 $833 $829 $21 17,953 
2014878 898 885 831 835 854 845 841 842 29 17,583 
2015888 892 877 832 807 813 836 855 30 17,452 
2016901 900 900 904 907 891 888 57 17,976 
2017847 845 813 791 775 758 107 18,181 
2018850 864 869 906 923 142 19,995 
2019837 845 856 876 173 19,447 
2020930 944 951 408 19,333 
20211,037 1,038 706 17,983 
20221,120 1,000 15,327 
Total$9,080 $2,673 
Short-duration contracts net cumulative paid claim adjustment expenses reconciliation of total liability for unpaid claim and claim adjustment expense
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$54 $249 $447 $618 $702 $754 $771 $779 $787 $791 
201451 223 392 515 647 707 743 787 802 
201560 234 404 542 612 677 725 794 
201664 248 466 625 701 736 784 
201757 222 394 498 557 596 
201854 282 473 599 706 
201964 263 422 567 
202067 248 400 
202158 217 
202264 
Total$5,721 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$3,359 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201399 
Liability for unallocated claim adjustment expenses for accident years presented56 
Total net liability for unpaid claim and claim adjustment expenses$3,514 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022Total
Accident Year
2013$10 $32 $(41)$(19)$(3)$(13)$(4)$(13)$(4)$(55)
201420 (13)(54)19 (9)(4)(36)
2015(15)(45)(25)23 19 (33)
2016(1)— (16)(3)(13)
2017(2)(32)(22)(16)(17)(89)
201814 37 17 73 
201911 20 39 
202014 21 
2021
Total net development for the accident years presented above(13)36 41 
Total net development for accident years prior to 2013(2)(14)
Total unallocated claim adjustment expense development— — 
Total$(15)$24 $50 
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
Surety | Specialty  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration contracts net incurred claims and allocated claim adjustment expenses
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$120 $121 $115 $106 $91 $87 $83 $82 $82 $82 $5,092 
2014123 124 94 69 60 45 45 43 42 5,127 
2015131 131 104 79 63 58 53 45 5,074 
2016124 124 109 84 67 64 58 5,544 
2017120 115 103 84 71 66 5,855 
2018114 108 91 62 56 16 6,196 
2019119 112 98 87 21 6,033 
2020128 119 81 51 4,452 
2021137 129 105 4,168 
2022155 143 2,772 
Total$801 $351 
Short-duration contracts net cumulative paid claim adjustment expenses reconciliation of total liability for unpaid claim and claim adjustment expense
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$16 $40 $69 $78 $78 $78 $77 $78 $79 $79 
201430 38 36 38 38 39 39 38 
201526 38 40 42 44 42 42 
201637 45 45 43 43 41 
201723 37 41 46 49 62 
201825 34 39 40 
201912 34 44 59 
202020 28 
202120 
202212 
Total$421 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$380 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013(4)
Liability for unallocated claim adjustment expenses for accident years presented20 
Total net liability for unpaid claim and claim adjustment expenses$396 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022Total
Accident Year
2013$$(6)$(9)$(15)$(4)$(4)$(1)$— $— $(38)
2014(30)(25)(9)(15)— (2)(1)(81)
2015— (27)(25)(16)(5)(5)(8)(86)
2016— (15)(25)(17)(3)(6)(66)
2017(5)(12)(19)(13)(5)(54)
2018(6)(17)(29)(6)(58)
2019(7)(14)(11)(32)
2020(9)(38)(47)
2021(8)(8)
Total net development for the accident years presented above(66)(75)(83)
Total net development for accident years prior to 2013(3)— 
Total unallocated claim adjustment expense development— — — 
Total$(69)$(73)$(83)
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
Commercial Auto | Commercial  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration contracts net incurred claims and allocated claim adjustment expenses
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$246 $265 $265 $249 $245 $245 $241 $241 $241 $243 $39,431 
2014234 223 212 205 205 201 201 202 201 33,631 
2015201 199 190 190 183 181 183 182 30,430 
2016198 186 186 186 190 195 200 30,452 
2017199 198 200 221 232 239 30,947 
2018229 227 227 245 254 34,319 
2019257 266 289 323 27 37,237 
2020310 303 304 56 29,070 
2021397 388 153 32,575 
2022437 263 30,229 
Total$2,771 $521 
Short-duration contracts net cumulative paid claim adjustment expenses reconciliation of total liability for unpaid claim and claim adjustment expense
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$74 $135 $168 $200 $225 $234 $238 $239 $239 $239 
201464 102 137 166 187 196 198 199 199 
201552 96 130 153 172 175 178 179 
201652 93 126 154 175 185 190 
201758 107 150 178 203 225 
201866 128 175 212 238 
201977 147 203 257 
202071 134 197 
202183 168 
2022112 
Total$2,004 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$767 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013
Liability for unallocated claim adjustment expenses for accident years presented16 
Total net liability for unpaid claim and claim adjustment expenses$787 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022Total
Accident Year
2013$19 $— $(16)$(4)$— $(4)$— $— $$(3)
2014(11)(11)(7)— (4)— (1)(33)
2015(2)(9)— (7)(2)(1)(19)
2016(12)— — 
2017(1)21 11 40 
2018(2)— 18 25 
201923 34 66 
2020(7)(6)
2021(9)(9)
Total net development for the accident years presented above32 53 47 
Total net development for accident years prior to 2013— 
Total unallocated claim adjustment expense development— — — 
Total$33 $53 $49 
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
General Liability | Commercial  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration contracts net incurred claims and allocated claim adjustment expenses
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$650 $655 $650 $655 $613 $623 $620 $623 $624 $629 $32 33,738 
2014653 658 654 631 635 658 659 659 676 34 28,131 
2015581 576 574 589 600 602 617 625 33 24,200 
2016623 659 667 671 673 683 684 43 24,699 
2017632 632 632 634 630 652 32 22,359 
2018653 644 646 639 650 127 20,242 
2019680 682 682 691 227 19,265 
2020723 722 726 434 13,998 
2021782 784 527 13,775 
2022929 835 10,572 
Total$7,046 $2,324 
Short-duration contracts net cumulative paid claim adjustment expenses reconciliation of total liability for unpaid claim and claim adjustment expense
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$31 $128 $240 $352 $450 $510 $551 $572 $582 $586 
201431 119 247 376 481 547 569 607 624 
201519 110 230 357 446 501 530 561 
201632 163 279 407 481 524 582 
201723 118 250 399 471 553 
201833 107 228 307 428 
201925 98 181 322 
202023 99 192 
202126 140 
202229 
Total$4,017 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$3,029 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013118 
Liability for unallocated claim adjustment expenses for accident years presented59 
Total net liability for unpaid claim and claim adjustment expenses$3,206 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022Total
Accident Year
2013$$(5)$$(42)$10 $(3)$$$$(21)
2014(4)(23)23 — 17 23 
2015(5)(2)15 11 15 44 
201636 10 61 
2017— — (4)22 20 
2018(9)(7)11 (3)
2019— 11 
2020(1)
2021
Total net development for the accident years presented above14 14 79 
Total net development for accident years prior to 2013(1)(12)
Total unallocated claim adjustment expense development— — 
Total$15 $15 $67 
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
Workers' Compensation | Commercial  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration contracts net incurred claims and allocated claim adjustment expenses
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$537 $572 $592 $618 $593 $582 $561 $552 $548 $537 $82 38,979 
2014467 480 479 452 450 446 439 448 430 76 33,522 
2015422 431 406 408 394 382 372 353 80 31,899 
2016426 405 396 382 366 355 331 77 31,991 
2017440 432 421 400 402 399 81 33,130 
2018450 440 428 415 415 93 34,875 
2019452 449 437 436 105 34,324 
2020477 466 446 182 29,392 
2021468 454 202 29,886 
2022497 308 28,753 
Total$4,298 $1,286 
Short-duration contracts net cumulative paid claim adjustment expenses reconciliation of total liability for unpaid claim and claim adjustment expense
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$80 $213 $300 $370 $417 $419 $411 $414 $417 $423 
201461 159 215 258 282 290 297 306 312 
201551 131 180 212 231 243 251 256 
201653 129 169 198 219 227 234 
201763 151 207 243 265 279 
201868 163 229 259 280 
201971 169 223 262 
202065 147 200 
202167 164 
202279 
Total$2,489 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$1,809 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 20131,874 
Other (2)
(20)
Liability for unallocated claim adjustment expenses for accident years presented76 
Total net liability for unpaid claim and claim adjustment expenses$3,739 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022Total
Accident Year
2013$35 $20 $26 $(25)$(11)$(21)$(9)$(4)$(11)$— 
201413 (1)(27)(2)(4)(7)(18)(37)
2015(25)(14)(12)(10)(19)(69)
2016(21)(9)(14)(16)(11)(24)(95)
2017(8)(11)(21)(3)(41)
2018(10)(12)(13)— (35)
2019(3)(12)(1)(16)
2020(11)(20)(31)
2021(14)(14)
Total net development for the accident years presented above(80)(50)(110)
Adjustment for development on a discounted basis(3)
Total net development for accident years prior to 2013(18)(34)(49)
Total unallocated claim adjustment expense development— — 10 
Total$(96)$(82)$(152)
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
(2) Other includes the effect of discounting lifetime claim reserves.
Excluding Hardy | International  
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]  
Short-duration contracts net incurred claims and allocated claim adjustment expenses
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2022
(In millions, except reported claims data)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022IBNRCumulative Number of Claims
Accident Year
2013$279 $281 $274 $255 $250 $243 $235 $231 $234 $235 $11 23,971 
2014268 283 282 271 264 281 282 273 279 13 24,962 
2015280 295 294 278 273 275 277 277 22 23,372 
2016275 292 279 277 268 281 283 29 17,813 
2017290 351 371 364 359 348 57 18,498 
2018357 374 379 378 390 67 20,849 
2019331 344 341 348 69 18,354 
2020368 360 350 138 14,952 
2021396 385 201 13,580 
2022414 294 8,320 
Total$3,309 $901 
Short-duration contracts net cumulative paid claim adjustment expenses reconciliation of total liability for unpaid claim and claim adjustment expense
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Accident Year
2013$48 $109 $135 $151 $165 $174 $192 $203 $209 $212 
201450 118 145 162 178 198 230 234 241 
201555 128 158 177 199 213 223 230 
201664 127 153 175 187 208 220 
201763 142 181 209 230 256 
201888 162 208 236 260 
201971 159 195 218 
202058 125 158 
202154 121 
202245 
Total$1,961 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$1,348 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201356 
Liability for unallocated claim adjustment expenses for accident years presented37 
Total net liability for unpaid claim and claim adjustment expenses$1,441 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021(1)
2022
Total (2)
Accident Year
2013$$(7)$(19)$(5)$(7)$(8)$(4)$$$(44)
201415 (1)(11)(7)17 (9)11 
201515 (1)(16)(5)— (3)
201617 (13)(2)(9)13 
201761 20 (7)(5)(11)58 
201817 (1)12 33 
201913 (3)17 
2020(8)(10)(18)
2021(11)(11)
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
(2) The amounts included in the loss reserve development tables above are presented at the year-end 2022 foreign currency exchange rates for all periods presented to remove the effects of foreign currency exchange rate fluctuations between calendar years. The amounts included within the table on page 102 presenting the detail of the development recorded within the International segment include the impact of fluctuations in foreign currency exchange rates.
v3.22.4
Reinsurance (Tables)
12 Months Ended
Dec. 31, 2022
Reinsurance Disclosures [Abstract]  
Components of Reinsurance Receivables
The following table presents the amounts receivable from reinsurers.
December 31
(In millions)20222021
Reinsurance receivables related to insurance reserves:
Ceded claim and claim adjustment expenses$5,191 $4,969 
Ceded future policy benefits— 288 
Reinsurance receivables related to paid losses247 227 
Reinsurance receivables5,438 5,484 
Allowance for uncollectible reinsurance(22)(21)
Reinsurance receivables, net of allowance for uncollectible reinsurance$5,416 $5,463 
Reinsurance Recoverable, Credit Quality Indicator The following table summarizes the outstanding amount of voluntary reinsurance receivables, gross of any collateral arrangements, by financial strength rating.
(In millions)December 31, 2022
A- to A++$3,785 
B- to B++1,020 
Insolvent
Total voluntary reinsurance outstanding balance(1)
$4,808 
(1)    Expected credit losses for legacy A&EP receivables are ceded to NICO and the reinsurance limit on the LPT has not been exhausted, therefore no allowance is recorded for these receivables and they are excluded from the table above. Refer to Note E to the Consolidated Financial Statements for information regarding the LPT. The Company has also excluded receivables from involuntary pools.
Components of Earned and Written Premiums
The effects of reinsurance on earned premiums and written premiums are presented in the following tables.
(In millions)DirectAssumedCededNetAssumed/
Net %
2022 Earned Premiums
Property and casualty$13,097 $231 $5,134 $8,194 2.8 %
Long term care427 46 — 473 9.7 %
Total earned premiums$13,524 $277 $5,134 $8,667 3.2 %
2021 Earned Premiums
Property and casualty$12,554 $240 $5,110 $7,684 3.1 %
Long term care443 48 — 491 9.8 %
Total earned premiums$12,997 $288 $5,110 $8,175 3.5 %
2020 Earned Premiums
Property and casualty$11,547 $238 $4,640 $7,145 3.3 %
Long term care454 50 — 504 9.9 %
Total earned premiums$12,001 $288 $4,640 $7,649 3.8 %
(In millions)DirectAssumedCededNetAssumed/
Net %
2022 Written Premiums
Property and casualty$13,843 $235 $5,417 $8,661 2.7 %
Long term care421 46 — 467 9.9 %
Total written premiums$14,264 $281 $5,417 $9,128 3.1 %
2021 Written Premiums
Property and casualty$13,150 $255 $5,485 $7,920 3.2 %
Long term care437 48 — 485 9.9 %
Total written premiums$13,587 $303 $5,485 $8,405 3.6 %
2020 Written Premiums
Property and casualty$12,168 $229 $4,832 $7,565 3.0 %
Long term care444 50 — 494 10.1 %
Total written premiums$12,612 $279 $4,832 $8,059 3.5 %
v3.22.4
Debt (Tables)
12 Months Ended
Dec. 31, 2022
Debt Disclosure [Abstract]  
Schedule of debt instruments
Debt is composed of the following long term obligations.
December 31
(In millions)20222021
Short term debt:
Debenture of CNAF, 7.250%, face amount of $243, due November 15, 2023
$243 $— 
Long term debt:
Senior notes of CNAF:
3.950%, face amount of $550, due May 15, 2024
549 549 
4.500%, face amount of $500, due March 1, 2026
499 499 
3.450%, face amount of $500, due August 15, 2027
497 497 
3.900%, face amount of $500, due May 1, 2029
497 496 
2.050%, face amount of $500, due August 15, 2030
496 495 
Debenture of CNAF, 7.250%, face amount of $243, due November 15, 2023
— 243 
Total long term debt2,538 2,779 
Total debt$2,781 $2,779 
Maturity of debt
The combined aggregate maturities for debt as of December 31, 2022 are presented in the following table.
(In millions)
2023$243 
2024550 
2025— 
2026500 
2027500 
Thereafter1,000 
Less: discount(12)
Total$2,781 
v3.22.4
Benefit Plans (Tables)
12 Months Ended
Dec. 31, 2022
Retirement Benefits [Abstract]  
Funded status
The following table presents a reconciliation of benefit obligations and plan assets.
Pension BenefitsPostretirement Benefits
(In millions)2022202120222021
Benefit obligation as of January 1$2,561 $2,769 $$
Changes in benefit obligation:
Interest cost67 62 — — 
Participants' contributions— — 
Actuarial (gain) loss(514)(84)— 
Benefits paid(171)(182)(4)(5)
Foreign currency translation and other(12)(2)— — 
Settlements— (2)— — 
Benefit obligation as of December 311,931 2,561 
Fair value of plan assets as of January 12,577 2,420 — — 
Change in plan assets:
Actual return on plan assets(374)332 — — 
Company contributions10 
Participants' contributions— — 
Benefits paid(171)(182)(4)(5)
Foreign currency translation and other(14)(1)— — 
Settlements— (2)— — 
Fair value of plan assets as of December 312,025 2,577 — — 
Funded status$94 $16 $(4)$(6)
Amounts recognized on the Consolidated Balance Sheets as of December 31:
Other assets$143 $77 $— $— 
Other liabilities(49)(61)(4)(6)
Net amount recognized$94 $16 $(4)$(6)
Amounts recognized in Accumulated other comprehensive income, not yet recognized in net periodic cost (benefit):
Net actuarial (gain) loss$743 $763 $$
Net amount recognized$743 $763 $$
Components of net periodic cost (benefit)
The components of net periodic pension cost (benefit) are presented in the following table.
Years ended December 31
(In millions)202220212020
Net periodic pension cost (benefit)
Interest cost on projected benefit obligation$67 $62 $80 
Expected return on plan assets(152)(154)(155)
Amortization of net actuarial loss (gain) 30 46 45 
Settlement loss— 
Total net periodic pension cost (benefit)$(55)$(45)$(27)
The following table indicates the line items in which the non-service cost (benefit) is presented in the Consolidated Statements of Operations.
Years ended December 31
(In millions)202220212020
Non-Service Cost (benefit):
Insurance claims and policyholder's benefits(15)$(13)$(8)
Other operating expenses(40)(32)(19)
Total net periodic pension cost (benefit)$(55)$(45)$(27)
Schedule of amounts recognized in Other comprehensive income
The amounts recognized in Other comprehensive income are presented in the following table.
Years ended December 31
(In millions)202220212020
Pension and postretirement benefits
Amounts arising during the period$(12)$262 $(67)
Settlement— 
Reclassification adjustment relating to prior service credit— — — 
Reclassification adjustment relating to actuarial loss30 46 45 
Total increase (decrease) in Other comprehensive income$18 $309 $(19)
Actuarial assumptions for benefit obligations and for net cost or benefit
Actuarial assumptions used for the CNA Retirement Plan and CNA Health and Group Benefits Program to determine benefit obligations are presented in the following table. The interest crediting rate is the weighted average interest rate applied to the individual pension balances for employees who elected to cease accruals effective December 31, 1999.
December 3120222021
Pension benefits
Discount rate5.350 %2.750 %
Interest crediting rate3.500 3.000 
Postretirement benefits
Discount rate5.250 %2.250 %
Actuarial assumptions used for the CNA Retirement Plan and CNA Health and Group Benefits Program to determine net cost or benefit are presented in the following table.
Years ended December 31202220212020
Pension benefits
Discount rate2.750 %2.350 %3.150 %
Expected long term rate of return6.250 6.750 7.250 
Interest crediting rate3.000 3.000 5.000 
Postretirement benefits
Discount rate2.250 %1.600 %2.300 %
Fair value of plan assets measured on a recurring basis
Pension plan assets measured at fair value on a recurring basis as well as cash are presented in the following tables.
December 31, 2022
(In millions)Level 1Level 2Level 3Total
Assets
Fixed maturity securities:
Corporate bonds and other$— $859 $$866 
States, municipalities and political subdivisions— 49 — 49 
Asset-backed— 157 166 
Total fixed maturity securities— 1,065 16 1,081 
Equity securities218 13 — 231 
Short term investments145 — 146 
Other assets— 12 — 12 
Cash— — — — 
Total assets measured at fair value$363 $1,091 $16 1,470 
Total equity securities measured at net asset value(1)
21 
Total limited partnerships measured at net asset value (1)
534 
Total$2,025 
December 31, 2021
(In millions)Level 1Level 2Level 3Total
Assets
Fixed maturity securities:
Corporate bonds and other$— $645 $$653 
States, municipalities and political subdivisions— 30 — 30 
Asset-backed— 110 — 110 
Total fixed maturity securities— 785 793 
Equity securities732 141 — 873 
Short term investments45 — — 45 
Other assets— — 
Cash— — — — 
Total assets measured at fair value$777 $934 $1,719 
Total equity securities measured at net asset value (1)
20 
Total limited partnerships measured at net asset value (1)
838 
Total$2,577 
(1) Certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the Plan's Statement of Financial Position.
Schedule of expected benefit payments
The table below presents the estimated future minimum benefit payments to participants as of December 31, 2022.
(In millions)Pension BenefitsPostretirement Benefits
2023$175 $
2024173 
2025171 — 
2026169 — 
2027167 — 
2028-2032752 
v3.22.4
Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]  
Restricted shares, performance-based restricted share units and performance share unit activity
The following table presents activity for non-vested RSUs and performance share units under the Plan in 2022.
Number of AwardsWeighted Average Grant Date Fair Value
Balance as of January 1, 20222,375,598 $41.21 
Awards granted1,031,729 46.78 
Awards vested(759,352)43.69 
Awards forfeited, canceled or expired(305,321)40.71 
Performance-based adjustment123,098 46.79 
Balance as of December 31, 20222,465,752 43.10 
v3.22.4
Other Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2022
Intangible Assets, Gross (Excluding Goodwill) [Abstract]  
Schedule of Other Intangible Assets
Other intangible assets are presented in the following table.
December 3120222021
(In millions)Economic Useful LifeGross Carrying AmountAccumulated AmortizationGross Carrying AmountAccumulated Amortization
Finite-lived intangible assets:
Trade name8 years$$$$
Distribution channel15 years10 11 
Total finite-lived intangible assets16 13 18 14 
Indefinite-lived intangible assets:
Syndicate capacity42 47 
Agency force16 16 
Insurance licenses10 — 
Total indefinite-lived intangible assets68 63 
Total other intangible assets$84 $13 $81 $14 
v3.22.4
Leases (Tables)
12 Months Ended
Dec. 31, 2022
Leases [Abstract]  
Assets and liabilities
The following table presents operating lease ROU assets and lease liabilities.
(In millions)December 31, 2022December 31, 2021
Operating lease ROU assets$155 $175 
Operating lease liabilities220 248 
Operating lease, liability, maturity
The following table presents the maturities of operating lease liabilities.
(In millions)December 31, 2022
2023$39 
202433 
202526 
202623 
202722 
Thereafter118 
Total lease payments261 
Less: Discount(41)
Total operating lease liabilities$220 
Lease cost
The following table presents the weighted average remaining lease term for operating leases and weighted average discount rate used in calculating operating lease ROU assets.
December 31, 2022December 31, 2021
Weighted average remaining lease term9.2 years9.8 years
Weighted average discount rate3.4 %3.4 %
v3.22.4
Stockholders' Equity and Statutory Accounting Practices (Tables)
12 Months Ended
Dec. 31, 2022
Stockholders' Equity and Statutory Accounting Practices [Abstract]  
Combined statutory capital and surplus and net income (loss)
Combined statutory capital and surplus and statutory net income (loss) for the Combined Continental Casualty Companies are presented in the table below, determined in accordance with accounting practices prescribed or permitted by insurance and/or other regulatory authorities
Statutory Capital and SurplusStatutory Net Income (Loss)
December 31Years ended December 31
(In millions)
2022 (1)
2021
2022 (1)
20212020
Combined Continental Casualty Companies$10,572 $11,321 $1,072 $1,253 $800 
(1) Information derived from the statutory-basis financial statements to be filed with insurance regulators.
v3.22.4
Accumulated Other Comprehensive Income (Loss) by Component (Tables)
12 Months Ended
Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income (Loss) by Component
The tables below display the changes in Accumulated other comprehensive income (loss) by component.
(In millions)Net unrealized gains (losses) on investments with an allowance for credit lossesNet unrealized gains (losses) on other investmentsPension and postretirement benefitsCumulative foreign currency translation adjustmentTotal
Balance as of January 1, 2022$(2)$1,039 $(604)$(113)$320 
Other comprehensive income (loss) before reclassifications— (3,903)(11)(108)(4,022)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $(1), $21, $6, $— and $26
(126)(24)— (145)
Other comprehensive income (loss) net of tax (expense) benefit of $1, $1,007, $(3), $— and $1,005
(5)(3,777)13 (108)(3,877)
Balance as of December 31, 2022$(7)$(2,738)$(591)$(221)$(3,557)
(In millions)Net unrealized gains (losses) on investments with an allowance for credit lossesNet unrealized gains (losses) on other investmentsPension and postretirement benefitsCumulative foreign currency translation adjustmentTotal
Balance as of January 1, 2021$— $1,745 $(848)$(94)$803 
Other comprehensive income (loss) before reclassifications(7)(625)207 (19)(444)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $1, $(21), $10, $— and $(10)
(5)81 (37)— 39 
Other comprehensive income (loss) net of tax (expense) benefit of $1, $188, $(65), $— and $124
(2)(706)244 (19)(483)
Balance as of December 31, 2021$(2)$1,039 $(604)$(113)$320 
Reclassification out of Accumulated Other Comprehensive Income
Amounts reclassified from Accumulated other comprehensive income (loss) shown above are reported in Net income (loss) as follows:
Component of AOCIConsolidated Statements of Operations Line Item Affected by Reclassifications
Net unrealized gains (losses) on investments with an allowance for credit losses and Net unrealized gains (losses) on other investmentsNet investment gains (losses)
Pension and postretirement benefitsOther operating expenses and Insurance claims and policyholders' benefits
v3.22.4
Business Segments (Tables)
12 Months Ended
Dec. 31, 2022
Segment Reporting [Abstract]  
Significant components of the Company's continuing operations and selected balance sheet items
The Company's results of operations and selected balance sheet items by segment are presented in the following tables.
Year ended December 31, 2022
Specialty

Commercial
InternationalLife &
Group
Corporate
& Other
  
(In millions)EliminationsTotal
Net written premiums$3,306 $4,193 $1,164 $467 $(1)$(1)$9,128 
Operating revenues 
Net earned premiums$3,203 $3,923 $1,070 $473 $(1)$(1)$8,667 
Net investment income431 488 63 804 19 — 1,805 
Non-insurance warranty revenue1,574 — — — — — 1,574 
Other revenues30 (1)(5)32 
Total operating revenues5,209 4,441 1,134 1,276 24 (6)12,078 
Claims, benefits and expenses      
Net incurred claims and benefits1,839 2,607 637 1,202 76 — 6,361 
Policyholders’ dividends19 — — — — 25 
Amortization of deferred acquisition costs656 634 200 — — — 1,490 
Non-insurance warranty expense1,471 — — — — — 1,471 
Other insurance related expenses336 557 146 118 (1)1,160 
Other expenses51 36 26 174 (5)291 
Total claims, benefits and expenses4,359 3,853 1,009 1,329 254 (6)10,798 
Core income (loss) before income tax850 588 125 (53)(230)— 1,280 
Income tax (expense) benefit on core income (loss)(182)(122)(19)44 47 — (232)
Core income (loss) $668 $466 $106 $(9)$(183)$— 1,048 
Net investment gains (losses)(199)
Income tax (expense) benefit on net investment gains (losses)45 
Net investment gains (losses), after tax(154)
Net income (loss)$894 
December 31, 2022
(In millions)      
Reinsurance receivables$1,384 $1,062 $414 $101 $2,477 $— $5,438 
Insurance receivables1,082 1,728 369 — — 3,187 
Deferred acquisition costs381 321 104 — — — 806 
Goodwill117 — 27 — — — 144 
Deferred non-insurance warranty acquisition expense3,671 — — — — — 3,671 
Insurance reserves 
Claim and claim adjustment expenses6,878 9,395 2,403 3,674 2,749 — 25,099 
Unearned premiums3,193 2,425 653 103 — — 6,374 
Future policy benefits— — — 10,151 — — 10,151 
Deferred non-insurance warranty revenue4,714 — — — — — 4,714 
Year ended December 31, 2021
Specialty

Commercial
InternationalLife &
Group
Corporate
& Other
  
(In millions)EliminationsTotal
Net written premiums$3,225 $3,595 $1,101 $485 $— $(1)$8,405 
Operating revenues 
Net earned premiums$3,076 $3,552 $1,057 $491 $— $(1)$8,175 
Net investment income497 624 57 966 15 — 2,159 
Non-insurance warranty revenue1,430 — — — — — 1,430 
Other revenues23 — — (6)24 
Total operating revenues5,004 4,199 1,114 1,457 21 (7)11,788 
Claims, benefits and expenses    
Net incurred claims and benefits1,787 2,540 652 1,239 109 — 6,327 
Policyholders’ dividends19 — — — — 22 
Amortization of deferred acquisition costs643 594 206 — — — 1,443 
Non-insurance warranty expense1,328 — — — — — 1,328 
Other insurance related expenses296 511 144 103 (1)1,062 
Other expenses47 38 (2)10 155 (6)242 
Total claims, benefits and expenses4,104 3,702 1,000 1,352 273 (7)10,424 
Core income (loss) before income tax900 497 114 105 (252)— 1,364 
Income tax (expense) benefit on core income (loss)(196)(103)(28)21 48 — (258)
Core income (loss)$704 $394 $86 $126 $(204)$— 1,106 
Net investment gains (losses)120 
Income tax (expense) benefit on net investment gains (losses)(24)
Net investment gains (losses), after tax96 
Net income (loss)$1,202 
December 31, 2021
(In millions)
Reinsurance receivables$1,200 $923 $381 $401 $2,579 $— $5,484 
Insurance receivables1,136 1,488 340 — 2,974 
Deferred acquisition costs363 278 96 — — — 737 
Goodwill117 — 31 — — — 148 
Deferred non-insurance warranty acquisition expense3,476 — — — — — 3,476 
Insurance reserves 
Claim and claim adjustment expenses6,433 8,890 2,280 3,754 2,817 — 24,174 
Unearned premiums3,001 2,066 585 109 — — 5,761 
Future policy benefits— — — 13,236 — — 13,236 
Deferred non-insurance warranty revenue4,503 — — — — — 4,503 
Year ended December 31, 2020
Specialty

Commercial
Life &
Group
Corporate
& Other
(In millions)InternationalEliminationsTotal
Net written premiums$3,040 $3,565 $961 $494 $— $(1)$8,059 
Operating revenues 
Net earned premiums$2,883 $3,323 $940 $504 $— $(1)$7,649 
Net investment income449 513 58 851 64 — 1,935 
Non-insurance warranty revenue1,252 — — — — — 1,252 
Other revenues25 — — (5)26 
Total operating revenues4,585 3,861 998 1,355 69 (6)10,862 
Claims, benefits and expenses     
Net incurred claims and benefits1,792 2,375 629 1,286 67 — 6,149 
Policyholders’ dividends18 — — — — 21 
Amortization of deferred acquisition costs621 592 197 — — — 1,410 
Non-insurance warranty expense1,159 — — — — — 1,159 
Other insurance related expenses280 506 136 109 (2)(1)1,028 
Other expenses50 34 (7)141 (5)220 
Total claims, benefits and expenses3,905 3,525 955 1,402 206 (6)9,987 
Core income (loss) before income tax680 336 43 (47)(137)— 875 
Income tax (expense) benefit on core income (loss)(145)(69)(5)56 23 — (140)
Core income (loss)$535 $267 $38 $$(114)$— 735 
Net investment gains (losses)(54)
Income tax (expense) benefit on net investment gains (losses)
Net investment gains (losses), after tax(45)
Net income (loss)$690 
Revenues by line of business
The following table presents operating revenues by line of business for each reportable segment.
Years ended December 31
(In millions)202220212020
Specialty
Management & Professional Liability$2,771 $2,776 $2,577 
Surety652 604 596 
Warranty & Alternative Risks1,786 1,624 1,412 
Specialty revenues5,209 5,004 4,585 
Commercial
Middle Market1,532 1,508 1,444 
Construction1,421 1,322 1,120 
Small Business581 558 482 
Other Commercial907 811 815 
Commercial revenues4,441 4,199 3,861 
International
Canada366 344 291 
Europe466 473 389 
Hardy302 297 318 
International revenues1,134 1,114 998 
Life & Group revenues1,276 1,457 1,355 
Corporate & Other revenues 24 21 69 
Eliminations(6)(7)(6)
Total operating revenues12,078 11,788 10,862 
Net investment gains (losses)(199)120 (54)
Total revenues$11,879 $11,908 $10,808 
v3.22.4
Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)
shares in Thousands, $ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Decrease accumulated other comprehensive income       $ (8,825) $ (12,809) $ (12,707)  
Anticipated amounts due from insureds related to losses under deductible policies       $ 1,100 $ 1,100    
Structured settlement annuities, interest rate, low end       6.40% 6.40%    
Discounted reserves for unfunded structured settlements       $ 485 $ 503    
Discounted reserves for unfunded structure settlements, discount amount       590 621    
Amount of interest recognized on the discounted reserves of unfunded structured settlements       $ 36 $ 36 35  
Interest rates at which workers' compensation lifetime claim reserves are discounted at       3.50% 3.50%    
Workers' compensation liability       $ 211 $ 228    
Discounted reserves for workers’ compensation lifetime claim reserves, discount amount       93 97    
Amount of interest accretion recognized on the discounted reserves of workers’ compensation lifetime claim reserves       $ 9 $ 12 $ 15  
Long term care claim reserves weighted average discounted interest rate       5.90% 5.80%    
Discounted reserves for long term care claim reserves       $ 2,800 $ 2,700    
Premium deficiency       $ 450 $ 428    
Liability for future policy benefits, gross premium valuation, pretax margin $ 125 $ 72 $ 125        
Minimum interest rate used to calculate reserves for long term care products       5.30% 5.30%    
Liability balance for guaranty fund       $ 74 $ 79    
Percentage of billed receivables compared to total reinsurance receivable       5.00%      
Policyholder dividends, rate on policy earnings       2.00% 1.00% 1.00%  
Increase (decrease) in shadow adjustment, net of tax       $ 2,416 $ 296    
Reduction of net unrealized gains on investments included in AOCI due to shadow adjustments       61 2,477    
Foreign currency transaction gain (loss), before tax       $ (22) $ (1) $ 13  
Operating lease, right-of-use asset, statement of financial position [Extensible List]       Other Assets Other Assets    
Operating lease, liability, statement of financial position [Extensible List]       Other liabilities Other liabilities    
Weighted average number diluted shares outstanding adjustment (in shares)       1,000 1,000 1,000  
Interest paid, net       $ 109 $ 110 $ 124  
Income taxes paid       $ 277 278 108  
Furniture and Fixtures              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Property, plant and equipment, useful life       7 years      
Office Equipment              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Property, plant and equipment, useful life       5 years      
Computer Software, Intangible Asset              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Property, plant and equipment, useful life       10 years      
Minimum              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Warranty coverage term       1 month      
Requisite service period for stock- based compensation expense       3 years      
Minimum | Computer Software, Intangible Asset              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Property, plant and equipment, useful life       3 years      
Maximum              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Warranty coverage term       10 years      
Maximum | Computer Software, Intangible Asset              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Property, plant and equipment, useful life       5 years      
CNAF Consolidated | Loews              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Noncontrolling interest, ownership percentage by parent       90.00%      
Accumulated Other Comprehensive (Loss) Income              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Decrease accumulated other comprehensive income       $ 3,557 $ (320) (803) $ (51)
Accumulated Other Comprehensive (Loss) Income | Revision of Prior Period, Accounting Standards Update, Adjustment              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Decrease accumulated other comprehensive income           $ 2,300  
v3.22.4
Investments (Net investment income) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Net Investment Income [Line Items]      
Gross investment income $ 1,877 $ 2,223 $ 1,999
Investment expense (72) (64) (64)
Net investment income 1,805 2,159 1,935
Fixed maturity securities      
Net Investment Income [Line Items]      
Gross investment income 1,787 1,707 1,728
Equity securities      
Net Investment Income [Line Items]      
Gross investment income 23 83 65
Limited partnership investments      
Net Investment Income [Line Items]      
Gross investment income (12) 362 121
Mortgage loans      
Net Investment Income [Line Items]      
Gross investment income 54 61 57
Short term investments      
Net Investment Income [Line Items]      
Gross investment income 16 1 9
Trading portfolio      
Net Investment Income [Line Items]      
Gross investment income 4 9 18
Other      
Net Investment Income [Line Items]      
Gross investment income 5 0 1
Common Stock      
Net Investment Income [Line Items]      
Equity securities, FV-NI, gain (loss) 47 28 34
Non-redeemable preferred stock      
Net Investment Income [Line Items]      
Equity securities, FV-NI, gain (loss) $ (75) $ 2 $ (3)
v3.22.4
Investments (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Gain (Loss) on Securities [Line Items]      
Non-income producing fixed maturity securities $ 0 $ 1,000,000  
Non-Income Producing Mortgage Loans 7,000,000 7,000,000  
Investments that exceed ten percent of stockholders' equity 0 0  
Investment and derivative, realized gain (loss), coinsurance agreement 18,000,000    
Gross gains 120,000,000 186,000,000 $ 220,000,000
Debt securities, available-for-sale, realized loss 261,000,000 90,000,000 220,000,000
Realized investment gains (losses)     20,000,000
Mortgage loan losses due to changes in expected credit losses 8,000,000 (10,000,000) $ 21,000,000
Limited partnership investments 1,926,000,000 1,859,000,000  
Undistributed earnings of limited partnership investments $ 176,000,000 $ 266,000,000  
Percentage of limited partnerships reported on a current basis 26.00%    
Percentage of limited partnerships reported on a one month lag 5.00%    
Limited partnerships invested in private debt and equity 76.00% 68.00%  
Percentage of limited partnerships employing hedge fund strategies focused on fixed income and equity investments 24.00% 32.00%  
Carrying value of ten largest limited partnerships $ 633,000,000 $ 665,000,000  
Carrying value of limited partnerships as percentage of aggregate partnership equity 1.00% 1.00%  
Income as percentage of change in partnership equity for all limited partnerships 2.00% 2.00% 2.00%
Obligation to return cash $ 1,000,000 $ 0  
Derivative liability, subject to master netting arrangement, collateral, right to reclaim cash offset 0 0  
Notional value   270,000,000  
Other liabilities (1,000,000) (12,000,000)  
Increase (decrease) fixed maturity securities 224,000,000    
Increase (decrease) short term investments 4,000,000    
Increase (decrease) accrued investment income 2,000,000    
Increase (decrease) funds withheld liability 216,000,000    
Embedded derivative, fair value of embedded derivative liability 14,000,000    
Commitments to purchase or fund privately placed debt securities 1,455,000,000    
Commitments to sell various privately placed debt securities 60,000,000    
Carrying value of securities deposited under requirements of regulatory authorities 2,800,000,000 3,000,000,000  
Cash and securities deposited as collateral for letters of credit 900,000,000 1,200,000,000  
5.875% face amount of $500, due August 15, 2020 | Senior Notes      
Gain (Loss) on Securities [Line Items]      
Face amount     $ 400,000,000
Fixed maturity securities      
Gain (Loss) on Securities [Line Items]      
OCI, debt securities, available-for-sale, gain (loss), after adjustment, before tax (7,850,000,000) (1,272,000,000) $ 1,637,000,000
Debt securities, available-for-sale, accrued interest, after allowance for credit loss 394,000,000 $ 369,000,000  
Mortgage loans      
Gain (Loss) on Securities [Line Items]      
Financing receivable, accrued interest, after allowance for credit loss 4,000,000    
Funds Withheld Liability Securities      
Gain (Loss) on Securities [Line Items]      
Gross gains 62,000,000    
Debt securities, available-for-sale, realized loss $ 44,000,000    
v3.22.4
Investments (Net realized investment gains (losses)) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Fixed maturity securities:      
Gross gains $ 120 $ 186 $ 220
Gross losses (261) (90) (220)
Net investment gains (losses) on fixed maturity securities (141) 96 0
Equity securities (116) 4 (3)
Derivatives 64 6 (10)
Mortgage loans (8) 10 (21)
Short term investments and other 2 4 (20)
Net investment gains (losses) $ (199) $ 120 $ (54)
v3.22.4
Investments (Components of other-than-temporary impairment losses recognized in earnings) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]      
Impairment losses (gains) recognized in earnings $ 62 $ 31 $ 111
Corporate and other bonds      
Debt Securities, Available-for-sale [Line Items]      
Impairment losses (gains) recognized in earnings 62 11 87
Asset-backed      
Debt Securities, Available-for-sale [Line Items]      
Impairment losses (gains) recognized in earnings $ 0 $ 20 $ 24
v3.22.4
Investments (Summary of fixed maturity and equity securities) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost $ 41,032 $ 39,945  
Gross Unrealized Gains 652 4,558  
Gross Unrealized Losses 4,056 112  
Allowance for Credit Losses 1 18 $ 40
Estimated Fair Value 37,627 44,373  
Debt Securities, Trading, Unrealized Gain (Loss) [Abstract]      
Total fixed maturity securities trading 0 7  
Total fixed maturity securities trading 0 7  
Debt securities, amortized cost 41,032 39,952  
Total fixed maturity securities 37,627 44,380  
Corporate and other bonds      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 23,137 21,444  
Gross Unrealized Gains 301 2,755  
Gross Unrealized Losses 2,009 56  
Allowance for Credit Losses 0 11 23
Estimated Fair Value 21,429 24,132  
Debt Securities, Trading, Unrealized Gain (Loss) [Abstract]      
Total fixed maturity securities 22,117 24,852  
States, municipalities and political subdivisions      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 8,918 10,358  
Gross Unrealized Gains 338 1,599  
Gross Unrealized Losses 939 14  
Allowance for Credit Losses 0 0  
Estimated Fair Value 8,317 11,943  
Debt Securities, Trading, Unrealized Gain (Loss) [Abstract]      
Total fixed maturity securities 8,317 11,943  
Residential mortgage-backed      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 3,073 2,893  
Gross Unrealized Gains 5 71  
Gross Unrealized Losses 447 8  
Allowance for Credit Losses 0 0  
Estimated Fair Value 2,631 2,956  
Commercial mortgage-backed      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 1,886 1,987  
Gross Unrealized Gains 4 63  
Gross Unrealized Losses 255 19  
Allowance for Credit Losses 0 0  
Estimated Fair Value 1,635 2,031  
Other asset-backed      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 3,287 2,561  
Gross Unrealized Gains 2 54  
Gross Unrealized Losses 361 10  
Allowance for Credit Losses 1 7  
Estimated Fair Value 2,927 2,598  
Asset-backed      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 8,246 7,441  
Gross Unrealized Gains 11 188  
Gross Unrealized Losses 1,063 37  
Allowance for Credit Losses 1 7 $ 17
Estimated Fair Value 7,193 7,585  
Debt Securities, Trading, Unrealized Gain (Loss) [Abstract]      
Total fixed maturity securities 7,193 7,585  
U.S. Treasury and obligations of government-sponsored enterprises      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 111 132  
Gross Unrealized Gains 1 1  
Gross Unrealized Losses 2 3  
Allowance for Credit Losses 0 0  
Estimated Fair Value 110 130  
Foreign government      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 617 570  
Gross Unrealized Gains 1 15  
Gross Unrealized Losses 43 2  
Allowance for Credit Losses 0 0  
Estimated Fair Value 575 583  
Redeemable preferred stock      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 3 0  
Gross Unrealized Gains 0 0  
Gross Unrealized Losses 0 0  
Allowance for Credit Losses 0 0  
Estimated Fair Value $ 3 $ 0  
v3.22.4
Investments (Securities in a gross unrealized loss position) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months $ 25,234 $ 5,695
Gross Unrealized Losses, Less than 12 Months 2,946 92
Estimated Fair Value, 12 Months or Longer 4,277 370
Gross Unrealized Losses, 12 Months or Longer 1,110 20
Estimated Fair Value, Total 29,511 6,065
Gross Unrealized Losses, Total 4,056 112
Corporate and other bonds    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 15,946 2,389
Gross Unrealized Losses, Less than 12 Months 1,585 48
Estimated Fair Value, 12 Months or Longer 1,634 136
Gross Unrealized Losses, 12 Months or Longer 424 8
Estimated Fair Value, Total 17,580 2,525
Gross Unrealized Losses, Total 2,009 56
States, municipalities and political subdivisions    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 4,079 730
Gross Unrealized Losses, Less than 12 Months 769 14
Estimated Fair Value, 12 Months or Longer 456 0
Gross Unrealized Losses, 12 Months or Longer 170 0
Estimated Fair Value, Total 4,535 730
Gross Unrealized Losses, Total 939 14
Residential mortgage-backed    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 1,406 1,043
Gross Unrealized Losses, Less than 12 Months 144 8
Estimated Fair Value, 12 Months or Longer 1,143 0
Gross Unrealized Losses, 12 Months or Longer 303 0
Estimated Fair Value, Total 2,549 1,043
Gross Unrealized Losses, Total 447 8
Commercial mortgage-backed    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 1,167 527
Gross Unrealized Losses, Less than 12 Months 159 7
Estimated Fair Value, 12 Months or Longer 408 167
Gross Unrealized Losses, 12 Months or Longer 96 12
Estimated Fair Value, Total 1,575 694
Gross Unrealized Losses, Total 255 19
Other asset-backed    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 2,087 840
Gross Unrealized Losses, Less than 12 Months 262 10
Estimated Fair Value, 12 Months or Longer 542 62
Gross Unrealized Losses, 12 Months or Longer 99 0
Estimated Fair Value, Total 2,629 902
Gross Unrealized Losses, Total 361 10
Asset-backed    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 4,660 2,410
Gross Unrealized Losses, Less than 12 Months 565 25
Estimated Fair Value, 12 Months or Longer 2,093 229
Gross Unrealized Losses, 12 Months or Longer 498 12
Estimated Fair Value, Total 6,753 2,639
Gross Unrealized Losses, Total 1,063 37
U.S. Treasury and obligations of government-sponsored enterprises    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 76 69
Gross Unrealized Losses, Less than 12 Months 1 3
Estimated Fair Value, 12 Months or Longer 16 5
Gross Unrealized Losses, 12 Months or Longer 1 0
Estimated Fair Value, Total 92 74
Gross Unrealized Losses, Total 2 3
Foreign government    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 473 97
Gross Unrealized Losses, Less than 12 Months 26 2
Estimated Fair Value, 12 Months or Longer 78 0
Gross Unrealized Losses, 12 Months or Longer 17 0
Estimated Fair Value, Total 551 97
Gross Unrealized Losses, Total $ 43 $ 2
v3.22.4
Investments (Securities in a gross unrealized loss position by ratings) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value $ 29,511 $ 6,065
Gross Unrealized Losses 4,056 112
U.S. Government, Government agencies and Government-sponsored enterprises    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value 2,355 898
Gross Unrealized Losses 337 8
AAA    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value 1,559 368
Gross Unrealized Losses 298 6
AA    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value 4,327 875
Gross Unrealized Losses 817 17
A    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value 6,615 1,516
Gross Unrealized Losses 749 23
BBB    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value 13,226 1,812
Gross Unrealized Losses 1,621 42
Non-investment grade    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value 1,429 596
Gross Unrealized Losses $ 234 $ 16
v3.22.4
Investments (Allowance on available-for-sale securities with credit impairments and PCD assets activity) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Allowance for credit losses:    
Balance, beginning of period $ 18 $ 40
Additions to the allowance for credit losses:    
Securities for which credit losses were not previously recorded 0 14
Available-for-sale securities accounted for as PCD assets 3 11
Reductions to the allowance for credit losses:    
Securities sold during the period (realized) 0 24
Write-offs charged against the allowance 12 16
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period (8) (7)
Balance, end of period 1 18
Corporate and other bonds    
Allowance for credit losses:    
Balance, beginning of period 11 23
Additions to the allowance for credit losses:    
Securities for which credit losses were not previously recorded 0 14
Available-for-sale securities accounted for as PCD assets 0 5
Reductions to the allowance for credit losses:    
Securities sold during the period (realized) 0 7
Write-offs charged against the allowance 12 16
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period 1 (8)
Balance, end of period 0 11
Asset-backed    
Allowance for credit losses:    
Balance, beginning of period 7 17
Additions to the allowance for credit losses:    
Securities for which credit losses were not previously recorded 0 0
Available-for-sale securities accounted for as PCD assets 3 6
Reductions to the allowance for credit losses:    
Securities sold during the period (realized) 0 17
Write-offs charged against the allowance 0 0
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period (9) 1
Balance, end of period $ 1 $ 7
v3.22.4
Investments (Contractual maturity) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Investments [Abstract]    
Due in one year or less, cost or amortized cost $ 1,012 $ 1,603
Due after one year through five years, cost or amortized cost 9,880 10,637
Due after five years through ten years, cost or amortized cost 13,788 13,294
Due after ten years, cost or amortized cost 16,352 14,411
Cost or Amortized Cost 41,032 39,945
Due in one year or less, estimated fair value 1,001 1,624
Due after one year through five years, estimated fair value 9,399 11,229
Due after five years through ten years, estimated fair value 12,453 14,338
Due after ten years, estimated fair value 14,774 17,182
Estimated Fair Value $ 37,627 $ 44,373
v3.22.4
Investments (Credit quality indicator) (Details) - Mortgage loans
$ in Millions
Dec. 31, 2022
USD ($)
Debt Securities, Available-for-sale [Line Items]  
2022 $ 249
2021 94
2020 150
2019 201
2018 63
Prior 307
Total 1,064
DSCR ≥1.6x | LTV less than 55%  
Debt Securities, Available-for-sale [Line Items]  
2022 9
2021 13
2020 112
2019 41
2018 53
Prior 255
Total 483
DSCR ≥1.6x | LTV 55% to 65%  
Debt Securities, Available-for-sale [Line Items]  
2022 13
2021 0
2020 0
2019 0
2018 0
Prior 0
Total 13
DSCR ≥1.6x | LTV greater than 65%  
Debt Securities, Available-for-sale [Line Items]  
2022 18
2021 11
2020 0
2019 0
2018 0
Prior 0
Total 29
DSCR 1.2x - 1.6x | LTV less than 55%  
Debt Securities, Available-for-sale [Line Items]  
2022 5
2021 49
2020 18
2019 43
2018 10
Prior 37
Total 162
DSCR 1.2x - 1.6x | LTV 55% to 65%  
Debt Securities, Available-for-sale [Line Items]  
2022 86
2021 0
2020 20
2019 0
2018 0
Prior 8
Total 114
DSCR 1.2x - 1.6x | LTV greater than 65%  
Debt Securities, Available-for-sale [Line Items]  
2022 15
2021 0
2020 0
2019 0
2018 0
Prior 0
Total 15
DSCR ≤1.2 | LTV less than 55%  
Debt Securities, Available-for-sale [Line Items]  
2022 35
2021 0
2020 0
2019 57
2018 0
Prior 0
Total 92
DSCR ≤1.2 | LTV 55% to 65%  
Debt Securities, Available-for-sale [Line Items]  
2022 41
2021 21
2020 0
2019 38
2018 0
Prior 0
Total 100
DSCR ≤1.2 | LTV greater than 65%  
Debt Securities, Available-for-sale [Line Items]  
2022 27
2021 0
2020 0
2019 22
2018 0
Prior 7
Total $ 56
v3.22.4
Fair Value (Assets and liabilities measured at fair value on a recurring basis) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Fixed maturity securities:    
Fixed maturity securities $ 37,627 $ 44,380
Equity securities:    
Equity securities 674 1,035
Short term and other 1,679 1,872
Total assets 39,980 47,287
Other liabilities 1 12
Total liabilities 1 12
Corporate and other bonds    
Fixed maturity securities:    
Fixed maturity securities 22,117 24,852
States, municipalities and political subdivisions    
Fixed maturity securities:    
Fixed maturity securities 8,317 11,943
Asset-backed    
Fixed maturity securities:    
Fixed maturity securities 7,193 7,585
Common Stock    
Equity securities:    
Equity securities 185 233
Non-redeemable preferred stock    
Equity securities:    
Equity securities 489 802
Level 1    
Fixed maturity securities:    
Fixed maturity securities 120 140
Equity securities:    
Equity securities 204 285
Short term and other 1,608 1,798
Total assets 1,932 2,223
Other liabilities 0 0
Total liabilities 0 0
Level 1 | Corporate and other bonds    
Fixed maturity securities:    
Fixed maturity securities 120 140
Level 1 | States, municipalities and political subdivisions    
Fixed maturity securities:    
Fixed maturity securities 0 0
Level 1 | Asset-backed    
Fixed maturity securities:    
Fixed maturity securities 0 0
Level 1 | Common Stock    
Equity securities:    
Equity securities 150 220
Level 1 | Non-redeemable preferred stock    
Equity securities:    
Equity securities 54 65
Level 2    
Fixed maturity securities:    
Fixed maturity securities 35,866 42,691
Equity securities:    
Equity securities 435 721
Short term and other 71 74
Total assets 36,372 43,486
Other liabilities 1 12
Total liabilities 1 12
Level 2 | Corporate and other bonds    
Fixed maturity securities:    
Fixed maturity securities 21,187 23,775
Level 2 | States, municipalities and political subdivisions    
Fixed maturity securities:    
Fixed maturity securities 8,274 11,887
Level 2 | Asset-backed    
Fixed maturity securities:    
Fixed maturity securities 6,405 7,029
Level 2 | Common Stock    
Equity securities:    
Equity securities 0 0
Level 2 | Non-redeemable preferred stock    
Equity securities:    
Equity securities 435 721
Level 3    
Fixed maturity securities:    
Fixed maturity securities 1,641 1,549
Equity securities:    
Equity securities 35 29
Short term and other 0 0
Total assets 1,676 1,578
Other liabilities 0 0
Total liabilities 0 0
Level 3 | Corporate and other bonds    
Fixed maturity securities:    
Fixed maturity securities 810 937
Level 3 | States, municipalities and political subdivisions    
Fixed maturity securities:    
Fixed maturity securities 43 56
Level 3 | Asset-backed    
Fixed maturity securities:    
Fixed maturity securities 788 556
Level 3 | Common Stock    
Equity securities:    
Equity securities 35 13
Level 3 | Non-redeemable preferred stock    
Equity securities:    
Equity securities $ 0 $ 16
v3.22.4
Fair Value (Table of reconciliation for assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, Beginning, Assets $ 1,578 $ 1,151
Reported in Net investment gains (losses) $ 1 $ (12)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Net investment (losses) gains Net investment (losses) gains
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Other comprehensive (loss) income Other comprehensive (loss) income
Reported in Other comprehensive income (loss) $ (323) $ (43)
Total realized and unrealized investment gains (losses) (308) (46)
Purchases 580 612
Sales (10) (32)
Settlements (145) (130)
Transfers into Level 3 85 150
Transfers out of Level 3 (104) (127)
Balance, Ending, Assets 1,676 1,578
Unrealized gains (losses) on Level 3 assets and liabilities recognized in Net income (loss) in the period (4) (2)
Unrealized gains (losses) on Level 3 assets and liabilities recognized in Other comprehensive income (loss) in the period (321) (44)
Corporate and other bonds    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, Beginning, Assets 937 770
Reported in Net investment gains (losses) (2) (10)
Reported in Other comprehensive income (loss) (184) (32)
Total realized and unrealized investment gains (losses) (185) (42)
Purchases 137 312
Sales (5) (3)
Settlements (84) (68)
Transfers into Level 3 10 20
Transfers out of Level 3 0 (52)
Balance, Ending, Assets 810 937
Unrealized gains (losses) on Level 3 assets and liabilities recognized in Net income (loss) in the period 0 0
Unrealized gains (losses) on Level 3 assets and liabilities recognized in Other comprehensive income (loss) in the period (183) (32)
States, municipalities and political subdivisions    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, Beginning, Assets 56 46
Reported in Net investment gains (losses) 0 0
Reported in Other comprehensive income (loss) (13) (1)
Total realized and unrealized investment gains (losses) (13) (1)
Purchases 0 12
Sales 0 0
Settlements 0 (1)
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, Ending, Assets 43 56
Unrealized gains (losses) on Level 3 assets and liabilities recognized in Net income (loss) in the period 0 0
Unrealized gains (losses) on Level 3 assets and liabilities recognized in Other comprehensive income (loss) in the period (13) (1)
Asset-backed    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, Beginning, Assets 556 308
Reported in Net investment gains (losses) 9 0
Reported in Other comprehensive income (loss) (126) (10)
Total realized and unrealized investment gains (losses) (101) (3)
Purchases 424 287
Sales (2) (9)
Settlements (70) (61)
Transfers into Level 3 75 109
Transfers out of Level 3 (94) (75)
Balance, Ending, Assets 788 556
Unrealized gains (losses) on Level 3 assets and liabilities recognized in Net income (loss) in the period 0 0
Unrealized gains (losses) on Level 3 assets and liabilities recognized in Other comprehensive income (loss) in the period (125) (11)
Equity securities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, Beginning, Assets 29 27
Reported in Net investment gains (losses) (6) (2)
Reported in Other comprehensive income (loss) 0 0
Total realized and unrealized investment gains (losses) (9) 0
Purchases 19 1
Sales (3) (20)
Settlements 9 0
Transfers into Level 3 0 21
Transfers out of Level 3 (10) 0
Balance, Ending, Assets 35 29
Unrealized gains (losses) on Level 3 assets and liabilities recognized in Net income (loss) in the period (4) (2)
Unrealized gains (losses) on Level 3 assets and liabilities recognized in Other comprehensive income (loss) in the period 0 0
Reported in Net investment income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Reported in Net investment income 14 9
Reported in Net investment income | Corporate and other bonds    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Reported in Net investment income 1 0
Reported in Net investment income | States, municipalities and political subdivisions    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Reported in Net investment income 0 0
Reported in Net investment income | Asset-backed    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Reported in Net investment income 16 7
Reported in Net investment income | Equity securities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Reported in Net investment income $ (3) $ 2
v3.22.4
Fair Value (Narrative) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Fair Value Disclosures [Abstract]    
Other invested assets overseas deposit $ 72 $ 74
v3.22.4
Fair Value (Quantitative information about significant unobservable inputs in the fair value measurement of level 3 assets) (Details)
$ in Millions
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Estimated fair value $ 39,980 $ 47,287
Fixed maturity securities | Discounted cash flow    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Estimated fair value $ 1,177 $ 1,225
Credit spread | Discounted cash flow | Minimum    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Debt securities, available-for-sale, measurement Input 0.01 0.01
Credit spread | Discounted cash flow | Maximum    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Debt securities, available-for-sale, measurement Input 0.08 0.07
Credit spread | Discounted cash flow | Weighted Average    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Debt securities, available-for-sale, measurement Input 0.02 0.02
v3.22.4
Fair Value (Carrying amount and estimated fair value of financial instrument assets and liabilities which are not measured at fair value) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Assets    
Mortgage loans $ 1,040 $ 973
Liabilities    
Long term debt 2,538 2,779
Carrying Amount    
Assets    
Mortgage loans 1,040 973
Liabilities    
Short term debt 243 0
Long term debt 2,538 2,779
Estimated Fair Value    
Assets    
Mortgage loans 973 1,018
Liabilities    
Short term debt 248 0
Long term debt 2,349 2,978
Level 1 | Estimated Fair Value    
Assets    
Mortgage loans 0 0
Liabilities    
Short term debt 0 0
Long term debt 0 0
Level 2 | Estimated Fair Value    
Assets    
Mortgage loans 0 0
Liabilities    
Short term debt 248 0
Long term debt 2,349 2,978
Level 3 | Estimated Fair Value    
Assets    
Mortgage loans 973 1,018
Liabilities    
Short term debt 0 0
Long term debt $ 0 $ 0
v3.22.4
Income Taxes (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Tax Contingency [Line Items]      
Unrecognized tax benefits $ 0 $ 0  
Interest income (expense) 0 0 $ 0
Income tax penalties expense 0 0 0
Accrued interest and penalties 0 0  
Deferred tax liability on undistributed income related to a foreign subsidiary 0    
Foreign tax expense (benefit) on income from continuing operations 1,000,000 18,000,000 16,000,000
Income (loss) from continuing foreign operations 141,000,000 124,000,000 45,000,000
Current foreign income tax benefit 10,000,000    
Operating loss carryforwards 0    
Tax credit carryforward, amount 0    
Valuation allowance 0 0  
Federal Income Taxes      
Income Tax Contingency [Line Items]      
Related party transaction, amounts of transaction 254,000,000 $ 238,000,000 $ 65,000,000
Foreign Tax Authority      
Income Tax Contingency [Line Items]      
Operating loss carryforwards 205,000,000    
Tax credit carryforward, amount $ 6,000,000    
v3.22.4
Income Taxes (Reconciliation between the Company's federal income tax (expense) benefit at statutory rates and the recorded income tax (expense) benefit) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Tax Disclosure [Abstract]      
Income tax expense at statutory rates $ (227) $ (312) $ (172)
Tax benefit from tax exempt income 41 51 52
Foreign taxes and credits 15 (3) 2
State income tax expense (10) (13) (6)
Other tax expense (6) (5) (7)
Income tax expense $ (187) $ (282) $ (131)
v3.22.4
Income Taxes (Current and deferred components of the Company's income tax (expense) benefit) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Tax Disclosure [Abstract]      
Current tax expense $ (221) $ (235) $ (180)
Deferred tax benefit (expense) 34 (47) 49
Income tax expense $ (187) $ (282) $ (131)
v3.22.4
Income Taxes (Significant components of the Company's deferred tax assets and liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Deferred Tax Assets:    
Property and casualty claim and claim adjustment expense reserves $ 188 $ 173
Unearned premium reserves 190 193
Deferred Revenue 64 64
Employee benefits 35 46
Deferred retroactive reinsurance benefit 89 90
Net unrealized losses 706  
Other assets 116 88
Gross deferred tax assets 1,388 654
Deferred Tax Liabilities:    
Investment valuation differences 59 93
Deferred acquisition costs 113 99
Net unrealized gains   272
Software and hardware 21 27
Other liabilities 17 21
Gross deferred tax liabilities 210 512
Net deferred tax asset $ 1,178 $ 142
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Reconciliation of Liability for Unpaid Claim and Claim Adjustment Expense) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Liability for Claims and Claims Adjustment Expense [Line Items]        
Total Net Carried Claim and Claim Adjustment Expense Reserves $ 19,908 $ 19,205 $ 18,701 $ 17,885
Reinsurance receivables 5,191      
Total gross liability for unpaid claim and claim adjustment expenses 25,099 24,174    
Specialty        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Total Net Carried Claim and Claim Adjustment Expense Reserves 5,563 5,265    
Reinsurance receivables 1,315      
Commercial        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Total Net Carried Claim and Claim Adjustment Expense Reserves 8,430 8,065    
Reinsurance receivables 965      
International        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Total Net Carried Claim and Claim Adjustment Expense Reserves 2,003 1,940    
Reinsurance receivables 400      
Life and Group        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Total Net Carried Claim and Claim Adjustment Expense Reserves 3,573      
Reinsurance receivables 101      
Corporate & Other        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Total Net Carried Claim and Claim Adjustment Expense Reserves 339 $ 294    
Reinsurance receivables $ 2,410      
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Reconciliation of Claim and Claim Adjustment Expense Reserves) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Reserves, beginning of year:      
Gross $ 24,174 $ 22,706 $ 21,720
Ceded 4,969 4,005 3,835
Net reserves, beginning of year 19,205 18,701 17,885
Reduction of net reserves due to Excess Workers' Compensation Loss Portfolio Transfer 0 (632) 0
Net incurred claim and claim adjustment expenses:      
Provision for insured events of current year 6,243 5,970 5,793
Increase (decrease) in provision for insured events of prior years (187) (104) (119)
Amortization of discount 170 174 183
Total net incurred 6,226 6,040 5,857
Net payments attributable to:      
Current year events (913) (1,014) (948)
Prior year events (4,348) (3,830) (4,216)
Total net payments (5,261) (4,844) (5,164)
Foreign currency translation adjustment and other (262) (60) 123
Net reserves, end of year 19,908 19,205 18,701
Ceded reserves, end of year 5,191 4,969 4,005
Gross reserves, end of year $ 25,099 $ 24,174 $ 22,706
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Gross and Net Carried Claim and Claim Adjustment Expense Reserves) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Sep. 30, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Liability for Claims and Claims Adjustment Expense [Line Items]          
Gross Case Reserves $ 10,387   $ 10,555    
Gross IBNR Reserves 14,712 $ 107 13,619    
Total Gross Carried Claim and Claim Adjustment Expense Reserves 25,099   24,174 $ 22,706 $ 21,720
Net Case Reserves 8,319   8,369    
Net IBNR Reserves 11,589   10,836    
Total Net Carried Claim and Claim Adjustment Expense Reserves 19,908   19,205 $ 18,701 $ 17,885
Specialty          
Liability for Claims and Claims Adjustment Expense [Line Items]          
Gross Case Reserves 1,529   1,578    
Gross IBNR Reserves 5,349   4,855    
Total Gross Carried Claim and Claim Adjustment Expense Reserves 6,878   6,433    
Net Case Reserves 1,310   1,338    
Net IBNR Reserves 4,253   3,927    
Total Net Carried Claim and Claim Adjustment Expense Reserves 5,563   5,265    
Commercial          
Liability for Claims and Claims Adjustment Expense [Line Items]          
Gross Case Reserves 3,156   3,184    
Gross IBNR Reserves 6,239   5,706    
Total Gross Carried Claim and Claim Adjustment Expense Reserves 9,395   8,890    
Net Case Reserves 2,809   2,850    
Net IBNR Reserves 5,621   5,215    
Total Net Carried Claim and Claim Adjustment Expense Reserves 8,430   8,065    
International          
Liability for Claims and Claims Adjustment Expense [Line Items]          
Gross Case Reserves 817   859    
Gross IBNR Reserves 1,586   1,421    
Total Gross Carried Claim and Claim Adjustment Expense Reserves 2,403   2,280    
Net Case Reserves 686   744    
Net IBNR Reserves 1,317   1,196    
Total Net Carried Claim and Claim Adjustment Expense Reserves 2,003   1,940    
Life & Group          
Liability for Claims and Claims Adjustment Expense [Line Items]          
Gross Case Reserves 3,457   3,383    
Gross IBNR Reserves 217   371    
Total Gross Carried Claim and Claim Adjustment Expense Reserves 3,674   3,754    
Net Case Reserves 3,377   3,291    
Net IBNR Reserves 196   350    
Total Net Carried Claim and Claim Adjustment Expense Reserves 3,573   3,641    
Corporate & Other          
Liability for Claims and Claims Adjustment Expense [Line Items]          
Gross Case Reserves 1,428   1,551    
Gross IBNR Reserves 1,321   1,266    
Total Gross Carried Claim and Claim Adjustment Expense Reserves 2,749   2,817    
Net Case Reserves 137   146    
Net IBNR Reserves 202   148    
Total Net Carried Claim and Claim Adjustment Expense Reserves $ 339   $ 294    
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Net Prior Year Development) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting Information [Line Items]      
Pretax (favorable) unfavorable premium development, excluding Life & Group $ (32) $ 11 $ (20)
Specialty      
Segment Reporting Information [Line Items]      
Pretax (favorable) unfavorable premium development, excluding Life & Group (40) (45) (61)
Commercial      
Segment Reporting Information [Line Items]      
Pretax (favorable) unfavorable premium development, excluding Life & Group (43) (6) (7)
International      
Segment Reporting Information [Line Items]      
Pretax (favorable) unfavorable premium development, excluding Life & Group (13) 2 (2)
Corporate & Other      
Segment Reporting Information [Line Items]      
Pretax (favorable) unfavorable premium development, excluding Life & Group $ 64 $ 60 $ 50
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended 13 Months Ended
Feb. 05, 2021
Sep. 30, 2022
Sep. 30, 2021
Mar. 31, 2021
Sep. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Feb. 05, 2021
Dec. 31, 2010
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Pretax (favorable) unfavorable premium development, excluding Life & Group           $ (32,000,000) $ 11,000,000 $ (20,000,000)    
Funds held under reinsurance agreements, liability $ 690,000,000         3,700,000,000 4,000,000,000   $ 690,000,000  
Retroactive reinsurance agreement, maximum 1,000,000,000               1,000,000,000  
Reinsurance premiums paid $ 697,000,000               $ 64,000,000  
Reinsurance, loss on uncollectible accounts in period, amount       $ 12,000,000            
Securities held as collateral, at fair value           608,000,000        
Liability for unpaid claims and claims adjustment expense, long term care policies, period increase (decrease)   $ (25,000,000) $ (40,000,000)              
Gross IBNR reserves   107,000,000     $ 107,000,000 14,712,000,000 13,619,000,000      
Liability for unpaid claims and claims adjustment expense, claim severity adjustment, period increase (decrease)   (82,000,000)     (82,000,000)          
Liability for unpaid claims and claims adjustment expense structured settlement obligations period increase (decrease)   (5,000,000) 2,000,000              
Liability for future policy benefits, gross premium valuation, pretax margin   $ 125,000,000 $ 72,000,000   $ 125,000,000          
Corporate & Other                    
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Pretax (favorable) unfavorable premium development, excluding Life & Group           64,000,000 60,000,000 50,000,000    
Gross IBNR reserves           1,321,000,000 1,266,000,000      
Commercial                    
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Pretax (favorable) unfavorable premium development, excluding Life & Group           (43,000,000) (6,000,000) (7,000,000)    
Gross IBNR reserves           6,239,000,000 5,706,000,000      
Asbestos and Environmental Reserves                    
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Net A&EP claim and allocated claim adjustment expense reserves ceded to NICO                   $ 1,600,000,000
Aggregate limit under A&EP Loss Portfolio Transfer                   4,000,000,000
A&EP claim and allocated claim adjustment expense reserves ceded under existing third party reinsurance contracts transferred to NICO under A&EP Loss Portfolio Transfer                   1,200,000,000
Reinsurance premium paid to NICO under A&EP Loss Portfolio Transfer                   2,000,000,000
Net reinsurance receivables transferred to NICO under A&EP Loss Portfolio Transfer                   215,000,000
Total consideration paid to NICO under AEP Loss Portfolio Transfer                   $ 2,200,000,000
Net A&EP adverse development before consideration of LPT           92,000,000 143,000,000 125,000,000    
Provision for uncollectible third-party reinsurance, released           5,000,000 5,000,000 $ 25,000,000    
Cumulative amounts ceded under AEP Loss Portfolio Transfer           3,500,000,000 3,400,000,000      
Deferred reinsurance benefit yet to be recognized           425,000,000 $ 429,000,000      
Fair value of collateral trust account established by NICO under A&EP Loss Portfolio Transfer           2,400,000,000        
Excess Workers' Compensation LPT                    
Liability for Claims and Claims Adjustment Expense [Line Items]                    
Funds held under reinsurance agreements, liability           $ 690,000,000        
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Specialty - Net Prior Year Claim and Allocated Claim Adjustment Expense Reserve Development) (Details) - Specialty - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Liability for Claims and Claims Adjustment Expense [Line Items]      
Medical Professional Liability $ 18 $ 23 $ 35
Other Professional Liability and Management Liability 50 24 (15)
Surety (83) (73) (69)
Warranty (21) (14) (7)
Other (4) (5) (5)
Total pretax (favorable) unfavorable development $ (40) $ (45) $ (61)
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Specialty - Line of Business Composition) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses $ 19,908 $ 19,205 $ 18,701 $ 17,885
Specialty        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 5,563 $ 5,265    
Medical Professional Liability | Specialty        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 1,526      
Other Professional Liability and Management Liability | Specialty        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 3,514      
Surety | Specialty        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 396      
Warranty | Specialty        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 50      
Other | Specialty        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses $ 77      
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Specialty - Medical Professional Liability - Cumulative Net Incurred Claims and Allocated Claim Adjustment Expenses) (Details) - Medical Professional Liability - Specialty
$ in Millions
Dec. 31, 2022
USD ($)
claim
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 4,624                  
IBNR 988                  
2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 530 $ 530 $ 531 $ 545 $ 535 $ 525 $ 513 $ 500 $ 479 $ 462
IBNR $ 5                  
Cumulative Number of Claims | claim 19,587                  
2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 527 524 527 529 535 530 537 489 $ 450  
IBNR $ 12                  
Cumulative Number of Claims | claim 19,818                  
2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 498 501 510 488 494 510 499 $ 433    
IBNR $ 22                  
Cumulative Number of Claims | claim 18,203                  
2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 508 510 508 499 485 487 $ 427      
IBNR $ 12                  
Cumulative Number of Claims | claim 16,136                  
2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 460 455 460 458 449 $ 412        
IBNR $ 30                  
Cumulative Number of Claims | claim 15,288                  
2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 470 448 431 429 $ 404          
IBNR $ 31                  
Cumulative Number of Claims | claim 15,163                  
2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 471 458 445 $ 430            
IBNR $ 101                  
Cumulative Number of Claims | claim 14,189                  
2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 455 476 $ 477              
IBNR $ 226                  
Cumulative Number of Claims | claim 10,679                  
2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 376 $ 377                
IBNR $ 259                  
Cumulative Number of Claims | claim 8,801                  
2022                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 329                  
IBNR $ 290                  
Cumulative Number of Claims | claim 6,717                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Specialty - Medical Professional Liability - Net Cumulative Paid Claim and Claim Adjustment Expenses) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,908 $ 19,205 $ 18,701 $ 17,885            
Specialty                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses 5,563 5,265                
Medical Professional Liability | Specialty                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 3,154                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 1,470                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013 25                  
Liability for unallocated claim adjustment expenses for accident years presented 31                  
Total net liability for unpaid claim and claim adjustment expenses 1,526                  
Medical Professional Liability | 2013 | Specialty                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 517 512 508 495 $ 462 $ 414 $ 355 $ 255 $ 119 $ 17
Medical Professional Liability | 2014 | Specialty                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 504 497 489 472 417 359 258 136 $ 23  
Medical Professional Liability | 2015 | Specialty                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 458 444 420 384 313 230 101 $ 22    
Medical Professional Liability | 2016 | Specialty                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 460 436 401 339 246 121 $ 18      
Medical Professional Liability | 2017 | Specialty                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 388 355 308 235 107 $ 19        
Medical Professional Liability | 2018 | Specialty                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 349 290 211 115 $ 21          
Medical Professional Liability | 2019 | Specialty                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 280 183 91 $ 17            
Medical Professional Liability | 2020 | Specialty                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 139 61 $ 11              
Medical Professional Liability | 2021 | Specialty                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 49 $ 11                
Medical Professional Liability | 2022 | Specialty                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net $ 10                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Specialty - Medical Professional Liability - Net Strengthening or Releasing of Prior Accident Year Reserves) (Details) - Specialty - USD ($)
$ in Millions
12 Months Ended 24 Months Ended 36 Months Ended 48 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Claims Development [Line Items]                                    
Total $ 18 $ 23 $ 35                              
Medical Professional Liability                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 16 13 34                              
Total net development for accident years prior to 2013 (3) 3 1                              
Total unallocated claim adjustment expense development 5 7 0                              
Total 18 23 35                              
Medical Professional Liability | 2013                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 0 (1) (14) $ 10 $ 10 $ 12 $ 13 $ 21 $ 17                 $ 68
Medical Professional Liability | 2014                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 3 (3) (2) (6) 5 (7) 48 $ 39                 $ 77  
Medical Professional Liability | 2015                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (3) (9) 22 (6) (16) 11 $ 66                 $ 65    
Medical Professional Liability | 2016                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (2) 2 9 14 (2) $ 60                 $ 81      
Medical Professional Liability | 2017                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 5 (5) 2 9 $ 37                 $ 48        
Medical Professional Liability | 2018                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 22 17 2 $ 25                 $ 66          
Medical Professional Liability | 2019                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 13 13 $ 15                 $ 41            
Medical Professional Liability | 2020                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (21) $ (1)                 $ (22)              
Medical Professional Liability | 2021                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims $ (1)                 $ (1)                
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Specialty - Other Professional Liability and Management Liability - Net Incurred Claims and Allocated Claim Adjustment Expenses) (Details) - Other Professional Liability and Management Liability - Specialty
$ in Millions
Dec. 31, 2022
USD ($)
claim
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 9,080                  
IBNR 2,673                  
2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 829 $ 833 $ 846 $ 850 $ 863 $ 866 $ 885 $ 926 $ 894 $ 884
IBNR $ 21                  
Cumulative Number of Claims | claim 17,953                  
2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 842 841 845 854 835 831 885 898 $ 878  
IBNR $ 29                  
Cumulative Number of Claims | claim 17,583                  
2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 855 836 813 807 832 877 892 $ 888    
IBNR $ 30                  
Cumulative Number of Claims | claim 17,452                  
2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 888 891 907 904 900 900 $ 901      
IBNR $ 57                  
Cumulative Number of Claims | claim 17,976                  
2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 758 775 791 813 845 $ 847        
IBNR $ 107                  
Cumulative Number of Claims | claim 18,181                  
2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 923 906 869 864 $ 850          
IBNR $ 142                  
Cumulative Number of Claims | claim 19,995                  
2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 876 856 845 $ 837            
IBNR $ 173                  
Cumulative Number of Claims | claim 19,447                  
2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 951 944 $ 930              
IBNR $ 408                  
Cumulative Number of Claims | claim 19,333                  
2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 1,038 $ 1,037                
IBNR $ 706                  
Cumulative Number of Claims | claim 17,983                  
2022                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 1,120                  
IBNR $ 1,000                  
Cumulative Number of Claims | claim 15,327                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Specialty - Other Professional Liability and Management Liability - Net Cumulative Paid Claim and Claim Adjustment Expenses) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,908 $ 19,205 $ 18,701 $ 17,885            
Specialty                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses 5,563 5,265                
Other Professional Liability and Management Liability | Specialty                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 5,721                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 3,359                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013 99                  
Liability for unallocated claim adjustment expenses for accident years presented 56                  
Total net liability for unpaid claim and claim adjustment expenses 3,514                  
Other Professional Liability and Management Liability | 2013 | Specialty                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 791 787 779 771 $ 754 $ 702 $ 618 $ 447 $ 249 $ 54
Other Professional Liability and Management Liability | 2014 | Specialty                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 802 787 743 707 647 515 392 223 $ 51  
Other Professional Liability and Management Liability | 2015 | Specialty                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 794 725 677 612 542 404 234 $ 60    
Other Professional Liability and Management Liability | 2016 | Specialty                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 784 736 701 625 466 248 $ 64      
Other Professional Liability and Management Liability | 2017 | Specialty                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 596 557 498 394 222 $ 57        
Other Professional Liability and Management Liability | 2018 | Specialty                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 706 599 473 282 $ 54          
Other Professional Liability and Management Liability | 2019 | Specialty                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 567 422 263 $ 64            
Other Professional Liability and Management Liability | 2020 | Specialty                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 400 248 $ 67              
Other Professional Liability and Management Liability | 2021 | Specialty                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 217 $ 58                
Other Professional Liability and Management Liability | 2022 | Specialty                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net $ 64                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Specialty - Other Professional Liability and Management Liability - Net Strengthening or Releasing of Prior Accident Year Reserves) (Details) - Specialty - USD ($)
$ in Millions
12 Months Ended 24 Months Ended 36 Months Ended 48 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Claims Development [Line Items]                                    
Total $ 50 $ 24 $ (15)                              
Other Professional Liability and Management Liability                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 41 36 (13)                              
Total net development for accident years prior to 2013 9 (14) (2)                              
Total unallocated claim adjustment expense development 0 2 0                              
Total 50 24 (15)                              
Other Professional Liability and Management Liability | 2013                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (4) (13) (4) $ (13) $ (3) $ (19) $ (41) $ 32 $ 10                 $ (55)
Other Professional Liability and Management Liability | 2014                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 1 (4) (9) 19 4 (54) (13) $ 20                 $ (36)  
Other Professional Liability and Management Liability | 2015                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 19 23 6 (25) (45) (15) $ 4                 $ (33)    
Other Professional Liability and Management Liability | 2016                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (3) (16) 3 4 0 $ (1)                 $ (13)      
Other Professional Liability and Management Liability | 2017                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (17) (16) (22) (32) $ (2)                 $ (89)        
Other Professional Liability and Management Liability | 2018                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 17 37 5 $ 14                 $ 73          
Other Professional Liability and Management Liability | 2019                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 20 11 $ 8                 $ 39            
Other Professional Liability and Management Liability | 2020                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 7 $ 14                 $ 21              
Other Professional Liability and Management Liability | 2021                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims $ 1                 $ 1                
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Specialty - Surety - Net Incurred Claims and Allocated Claim Adjustment Expenses) (Details) - Surety - Specialty
$ in Millions
Dec. 31, 2022
USD ($)
claim
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 801                  
IBNR 351                  
2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 82 $ 82 $ 82 $ 83 $ 87 $ 91 $ 106 $ 115 $ 121 $ 120
IBNR $ 2                  
Cumulative Number of Claims | claim 5,092                  
2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 42 43 45 45 60 69 94 124 $ 123  
IBNR $ 3                  
Cumulative Number of Claims | claim 5,127                  
2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 45 53 58 63 79 104 131 $ 131    
IBNR $ 1                  
Cumulative Number of Claims | claim 5,074                  
2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 58 64 67 84 109 124 $ 124      
IBNR $ 5                  
Cumulative Number of Claims | claim 5,544                  
2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 66 71 84 103 115 $ 120        
IBNR $ 4                  
Cumulative Number of Claims | claim 5,855                  
2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 56 62 91 108 $ 114          
IBNR $ 16                  
Cumulative Number of Claims | claim 6,196                  
2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 87 98 112 $ 119            
IBNR $ 21                  
Cumulative Number of Claims | claim 6,033                  
2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 81 119 $ 128              
IBNR $ 51                  
Cumulative Number of Claims | claim 4,452                  
2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 129 $ 137                
IBNR $ 105                  
Cumulative Number of Claims | claim 4,168                  
2022                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 155                  
IBNR $ 143                  
Cumulative Number of Claims | claim 2,772                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Specialty - Surety - Net Cumulative Paid Claim and Claim Adjustment Expenses) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,908 $ 19,205 $ 18,701 $ 17,885            
Specialty                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses 5,563 5,265                
Surety | Specialty                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 421                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 380                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013 (4)                  
Liability for unallocated claim adjustment expenses for accident years presented 20                  
Total net liability for unpaid claim and claim adjustment expenses 396                  
Surety | Specialty | 2013                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 79 79 78 77 $ 78 $ 78 $ 78 $ 69 $ 40 $ 16
Surety | Specialty | 2014                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 38 39 39 38 38 36 38 30 $ 7  
Surety | Specialty | 2015                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 42 42 44 42 40 38 26 $ 7    
Surety | Specialty | 2016                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 41 43 43 45 45 37 $ 5      
Surety | Specialty | 2017                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 62 49 46 41 37 $ 23        
Surety | Specialty | 2018                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 40 39 34 25 $ 5          
Surety | Specialty | 2019                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 59 44 34 $ 12            
Surety | Specialty | 2020                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 28 20 $ 4              
Surety | Specialty | 2021                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 20 $ 5                
Surety | Specialty | 2022                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net $ 12                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Specialty - Surety - Net Strengthening or Releasing of Prior Accident Year Reserves) (Details) - Specialty - USD ($)
$ in Millions
12 Months Ended 24 Months Ended 36 Months Ended 48 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Claims Development [Line Items]                                    
Total $ (83) $ (73) $ (69)                              
Surety                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (83) (75) (66)                              
Total net development for accident years prior to 2013 0 2 (3)                              
Total unallocated claim adjustment expense development 0 0 0                              
Total (83) (73) (69)                              
Surety | 2013                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 0 0 (1) $ (4) $ (4) $ (15) $ (9) $ (6) $ 1                 $ (38)
Surety | 2014                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (1) (2) 0 (15) (9) (25) (30) $ 1                 $ (81)  
Surety | 2015                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (8) (5) (5) (16) (25) (27) $ 0                 $ (86)    
Surety | 2016                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (6) (3) (17) (25) (15) $ 0                 $ (66)      
Surety | 2017                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (5) (13) (19) (12) $ (5)                 $ (54)        
Surety | 2018                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (6) (29) (17) $ (6)                 $ (58)          
Surety | 2019                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (11) (14) $ (7)                 $ (32)            
Surety | 2020                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (38) $ (9)                 $ (47)              
Surety | 2022                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims $ (8)                 $ (8)                
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Commercial - Net Prior Year Claim and Allocated Claim Adjustment Expense Reserve Development) (Details) - Commercial - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Liability for Claims and Claims Adjustment Expense [Line Items]      
Commercial $ 49 $ 53 $ 33
General Liability 67 15 15
Workers' Compensation (152) (82) (96)
Property and Other (7) 8 41
Total pretax (favorable) unfavorable development $ (43) $ (6) $ (7)
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Commercial - Commercial Auto - Short Duration Contracts) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses $ 19,908 $ 19,205 $ 18,701 $ 17,885
Commercial        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 8,430 $ 8,065    
Commercial Auto | Commercial        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 787      
General Liability | Commercial        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 3,206      
Workers' Compensation | Commercial        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 3,739      
Property and Other | Commercial        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses $ 698      
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Commercial - Commercial Auto - Net Incurred Claims and Allocated Claim Adjustment Expenses) (Details) - Commercial Auto - Commercial
$ in Millions
Dec. 31, 2022
USD ($)
claim
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 2,771                  
IBNR 521                  
2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 243 $ 241 $ 241 $ 241 $ 245 $ 245 $ 249 $ 265 $ 265 $ 246
IBNR $ 3                  
Cumulative Number of Claims | claim 39,431                  
2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 201 202 201 201 205 205 212 223 $ 234  
IBNR $ 1                  
Cumulative Number of Claims | claim 33,631                  
2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 182 183 181 183 190 190 199 $ 201    
IBNR $ 3                  
Cumulative Number of Claims | claim 30,430                  
2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 200 195 190 186 186 186 $ 198      
IBNR $ 7                  
Cumulative Number of Claims | claim 30,452                  
2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 239 232 221 200 198 $ 199        
IBNR $ 3                  
Cumulative Number of Claims | claim 30,947                  
2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 254 245 227 227 $ 229          
IBNR $ 5                  
Cumulative Number of Claims | claim 34,319                  
2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 323 289 266 $ 257            
IBNR $ 27                  
Cumulative Number of Claims | claim 37,237                  
2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 304 303 $ 310              
IBNR $ 56                  
Cumulative Number of Claims | claim 29,070                  
2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 388 $ 397                
IBNR $ 153                  
Cumulative Number of Claims | claim 32,575                  
2022                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 437                  
IBNR $ 263                  
Cumulative Number of Claims | claim 30,229                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Commercial - Commercial Auto - Net Cumulative Paid Claim and Claim Adjustment Expenses) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,908 $ 19,205 $ 18,701 $ 17,885            
Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses 8,430 8,065                
Commercial Auto | Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 2,004                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 767                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013 4                  
Liability for unallocated claim adjustment expenses for accident years presented 16                  
Total net liability for unpaid claim and claim adjustment expenses 787                  
Commercial Auto | Commercial | 2013                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 239 239 239 238 $ 234 $ 225 $ 200 $ 168 $ 135 $ 74
Commercial Auto | Commercial | 2014                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 199 199 198 196 187 166 137 102 $ 64  
Commercial Auto | Commercial | 2015                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 179 178 175 172 153 130 96 $ 52    
Commercial Auto | Commercial | 2016                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 190 185 175 154 126 93 $ 52      
Commercial Auto | Commercial | 2017                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 225 203 178 150 107 $ 58        
Commercial Auto | Commercial | 2018                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 238 212 175 128 $ 66          
Commercial Auto | Commercial | 2019                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 257 203 147 $ 77            
Commercial Auto | Commercial | 2020                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 197 134 $ 71              
Commercial Auto | Commercial | 2021                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 168 $ 83                
Commercial Auto | Commercial | 2022                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net $ 112                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Commercial - Commercial Auto - Net Strengthening or Releasing of Prior Accident Year Reserves) (Details) - Commercial - USD ($)
$ in Millions
12 Months Ended 24 Months Ended 36 Months Ended 48 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Total $ 49 $ 53 $ 33                              
Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 47 53 32                              
Total net development for accident years prior to 2013 2 0 1                              
Total unallocated claim adjustment expense development 0 0 0                              
Total 49 53 33                              
2013 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 2 0 0 $ (4) $ 0 $ (4) $ (16) $ 0 $ 19                 $ (3)
2014 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (1) 1 0 (4) 0 (7) (11) $ (11)                 $ (33)  
2015 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (1) 2 (2) (7) 0 (9) $ (2)                 $ (19)    
2016 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 5 5 4 0 0 $ (12)                 $ 2      
2017 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 7 11 21 2 $ (1)                 $ 40        
2018 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 9 18 0 $ (2)                 $ 25          
2019 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 34 23 $ 9                 $ 66            
2020 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 1 $ (7)                 $ (6)              
2022 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims $ (9)                 $ (9)                
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Commercial - General Liability - Net Incurred Claims and Allocated Claim Adjustment Expenses) (Details) - General Liability - Commercial
$ in Millions
Dec. 31, 2022
USD ($)
claim
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 7,046                  
IBNR 2,324                  
2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 629 $ 624 $ 623 $ 620 $ 623 $ 613 $ 655 $ 650 $ 655 $ 650
IBNR $ 32                  
Cumulative Number of Claims | claim 33,738                  
2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 676 659 659 658 635 631 654 658 $ 653  
IBNR $ 34                  
Cumulative Number of Claims | claim 28,131                  
2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 625 617 602 600 589 574 576 $ 581    
IBNR $ 33                  
Cumulative Number of Claims | claim 24,200                  
2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 684 683 673 671 667 659 $ 623      
IBNR $ 43                  
Cumulative Number of Claims | claim 24,699                  
2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 652 630 634 632 632 $ 632        
IBNR $ 32                  
Cumulative Number of Claims | claim 22,359                  
2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 650 639 646 644 $ 653          
IBNR $ 127                  
Cumulative Number of Claims | claim 20,242                  
2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 691 682 682 $ 680            
IBNR $ 227                  
Cumulative Number of Claims | claim 19,265                  
2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 726 722 $ 723              
IBNR $ 434                  
Cumulative Number of Claims | claim 13,998                  
2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 784 $ 782                
IBNR $ 527                  
Cumulative Number of Claims | claim 13,775                  
2022                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 929                  
IBNR $ 835                  
Cumulative Number of Claims | claim 10,572                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Commercial - General Liability - Net Cumulative Paid Claim and Claim Adjustment Expenses) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,908 $ 19,205 $ 18,701 $ 17,885            
Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses 8,430 8,065                
General Liability | Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 4,017                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 3,029                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013 118                  
Liability for unallocated claim adjustment expenses for accident years presented 59                  
Total net liability for unpaid claim and claim adjustment expenses 3,206                  
General Liability | Commercial | 2013                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 586 582 572 551 $ 510 $ 450 $ 352 $ 240 $ 128 $ 31
General Liability | Commercial | 2014                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 624 607 569 547 481 376 247 119 $ 31  
General Liability | Commercial | 2015                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 561 530 501 446 357 230 110 $ 19    
General Liability | Commercial | 2016                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 582 524 481 407 279 163 $ 32      
General Liability | Commercial | 2017                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 553 471 399 250 118 $ 23        
General Liability | Commercial | 2018                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 428 307 228 107 $ 33          
General Liability | Commercial | 2019                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 322 181 98 $ 25            
General Liability | Commercial | 2020                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 192 99 $ 23              
General Liability | Commercial | 2021                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 140 $ 26                
General Liability | Commercial | 2022                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net $ 29                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Commercial - General Liability - Net Strengthening or Releasing of Prior Accident Year Reserves) (Details) - Commercial - USD ($)
$ in Millions
12 Months Ended 24 Months Ended 36 Months Ended 48 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Total $ 67 $ 15 $ 15                              
General Liability                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 79 14 14                              
Total net development for accident years prior to 2013 (12) (1) 1                              
Total unallocated claim adjustment expense development 0 2 0                              
Total 67 15 15                              
General Liability | 2013                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 5 1 3 $ (3) $ 10 $ (42) $ 5 $ (5) $ 5                 $ (21)
General Liability | 2014                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 17 0 1 23 4 (23) (4) $ 5                 $ 23  
General Liability | 2015                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 8 15 2 11 15 (2) $ (5)                 $ 44    
General Liability | 2016                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 1 10 2 4 8 $ 36                 $ 61      
General Liability | 2017                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 22 (4) 2 0 $ 0                 $ 20        
General Liability | 2018                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 11 (7) 2 $ (9)                 $ (3)          
General Liability | 2019                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 9 0 $ 2                 $ 11            
General Liability | 2020                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 4 $ (1)                 $ 3              
General Liability | 2021                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims $ 2                 $ 2                
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Commercial - Workers' Compensation - Net Incurred Claims and Allocated Claim Adjustment Expenses) (Details) - Workers' Compensation - Commercial
$ in Millions
Dec. 31, 2022
USD ($)
claim
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 4,298                  
IBNR 1,286                  
2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 537 $ 548 $ 552 $ 561 $ 582 $ 593 $ 618 $ 592 $ 572 $ 537
IBNR $ 82                  
Cumulative Number of Claims | claim 38,979                  
2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 430 448 439 446 450 452 479 480 $ 467  
IBNR $ 76                  
Cumulative Number of Claims | claim 33,522                  
2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 353 372 382 394 408 406 431 $ 422    
IBNR $ 80                  
Cumulative Number of Claims | claim 31,899                  
2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 331 355 366 382 396 405 $ 426      
IBNR $ 77                  
Cumulative Number of Claims | claim 31,991                  
2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 399 402 400 421 432 $ 440        
IBNR $ 81                  
Cumulative Number of Claims | claim 33,130                  
2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 415 415 428 440 $ 450          
IBNR $ 93                  
Cumulative Number of Claims | claim 34,875                  
2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 436 437 449 $ 452            
IBNR $ 105                  
Cumulative Number of Claims | claim 34,324                  
2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 446 466 $ 477              
IBNR $ 182                  
Cumulative Number of Claims | claim 29,392                  
2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 454 $ 468                
IBNR $ 202                  
Cumulative Number of Claims | claim 29,886                  
2022                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 497                  
IBNR $ 308                  
Cumulative Number of Claims | claim 28,753                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Commercial - Workers' Compensation - Net Cumulative Paid Claim and Claim Adjustment Expenses) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,908 $ 19,205 $ 18,701 $ 17,885            
Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses 8,430 8,065                
Workers' Compensation | Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 2,489                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 1,809                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013 1,874                  
Other (20)                  
Liability for unallocated claim adjustment expenses for accident years presented 76                  
Total net liability for unpaid claim and claim adjustment expenses 3,739                  
Workers' Compensation | 2013 | Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 423 417 414 411 $ 419 $ 417 $ 370 $ 300 $ 213 $ 80
Workers' Compensation | 2014 | Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 312 306 297 290 282 258 215 159 $ 61  
Workers' Compensation | 2015 | Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 256 251 243 231 212 180 131 $ 51    
Workers' Compensation | 2016 | Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 234 227 219 198 169 129 $ 53      
Workers' Compensation | 2017 | Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 279 265 243 207 151 $ 63        
Workers' Compensation | 2018 | Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 280 259 229 163 $ 68          
Workers' Compensation | 2019 | Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 262 223 169 $ 71            
Workers' Compensation | 2020 | Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 200 147 $ 65              
Workers' Compensation | 2021 | Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 164 $ 67                
Workers' Compensation | 2022 | Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net $ 79                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Commercial - Workers' Compensation - Net Strengthening or Releasing of Prior Accident Year Reserves) (Details) - Commercial - USD ($)
$ in Millions
12 Months Ended 24 Months Ended 36 Months Ended 48 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Total $ (152) $ (82) $ (96)                              
Workers' Compensation                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (110) (50) (80)                              
Adjustment for development on a discounted basis (3) 2 2                              
Total net development for accident years prior to 2013 (49) (34) (18)                              
Total unallocated claim adjustment expense development 10 0 0                              
Total (152) (82) (96)                              
Workers' Compensation | 2013                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (11) (4) (9) $ (21) $ (11) $ (25) $ 26 $ 20 $ 35                 $ 0
Workers' Compensation | 2014                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (18) 9 (7) (4) (2) (27) (1) $ 13                 $ (37)  
Workers' Compensation | 2015                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (19) (10) (12) (14) 2 (25) $ 9                 $ (69)    
Workers' Compensation | 2016                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (24) (11) (16) (14) (9) $ (21)                 $ (95)      
Workers' Compensation | 2017                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (3) 2 (21) (11) $ (8)                 $ (41)        
Workers' Compensation | 2018                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 0 (13) (12) $ (10)                 $ (35)          
Workers' Compensation | 2019                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (1) (12) $ (3)                 $ (16)            
Workers' Compensation | 2020                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (20) $ (11)                 $ (31)              
Workers' Compensation | 2021                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims $ (14)                 $ (14)                
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (International - Net prior year claim and allocated claim adjustment expense reserve development) (Details) - International - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Liability for Claims and Claims Adjustment Expense [Line Items]      
Commercial $ (10) $ (35) $ (2)
Specialty (4) 36 3
Other 1 1 (3)
Total pretax (favorable) unfavorable development $ (13) $ 2 $ (2)
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (International - Short Duration Contracts) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses $ 19,908 $ 19,205 $ 18,701 $ 17,885
International        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 2,003 $ 1,940    
Excluding Hardy | International        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 1,441      
Hardy | International        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses $ 562      
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (International - Excluding Hardy - Net Incurred Claims and Allocated Claim Adjustment Expenses) (Details) - Excluding Hardy - International
$ in Millions
Dec. 31, 2022
USD ($)
claim
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 3,309                  
IBNR 901                  
2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 235 $ 234 $ 231 $ 235 $ 243 $ 250 $ 255 $ 274 $ 281 $ 279
IBNR $ 11                  
Cumulative Number of Claims | claim 23,971                  
2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 279 273 282 281 264 271 282 283 $ 268  
IBNR $ 13                  
Cumulative Number of Claims | claim 24,962                  
2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 277 277 275 273 278 294 295 $ 280    
IBNR $ 22                  
Cumulative Number of Claims | claim 23,372                  
2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 283 281 268 277 279 292 $ 275      
IBNR $ 29                  
Cumulative Number of Claims | claim 17,813                  
2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 348 359 364 371 351 $ 290        
IBNR $ 57                  
Cumulative Number of Claims | claim 18,498                  
2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 390 378 379 374 $ 357          
IBNR $ 67                  
Cumulative Number of Claims | claim 20,849                  
2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 348 341 344 $ 331            
IBNR $ 69                  
Cumulative Number of Claims | claim 18,354                  
2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 350 360 $ 368              
IBNR $ 138                  
Cumulative Number of Claims | claim 14,952                  
2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 385 $ 396                
IBNR $ 201                  
Cumulative Number of Claims | claim 13,580                  
2022                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 414                  
IBNR $ 294                  
Cumulative Number of Claims | claim 8,320                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (International - Excluding Hardy - Net Cumulative Paid Claim and Claim Adjustment Expenses) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,908 $ 19,205 $ 18,701 $ 17,885            
International                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses 2,003 1,940                
Excluding Hardy | International                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 1,961                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 1,348                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013 56                  
Liability for unallocated claim adjustment expenses for accident years presented 37                  
Total net liability for unpaid claim and claim adjustment expenses 1,441                  
Excluding Hardy | 2013 | International                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 212 209 203 192 $ 174 $ 165 $ 151 $ 135 $ 109 $ 48
Excluding Hardy | 2014 | International                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 241 234 230 198 178 162 145 118 $ 50  
Excluding Hardy | 2015 | International                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 230 223 213 199 177 158 128 $ 55    
Excluding Hardy | 2016 | International                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 220 208 187 175 153 127 $ 64      
Excluding Hardy | 2017 | International                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 256 230 209 181 142 $ 63        
Excluding Hardy | 2018 | International                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 260 236 208 162 $ 88          
Excluding Hardy | 2019 | International                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 218 195 159 $ 71            
Excluding Hardy | 2020 | International                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 158 125 $ 58              
Excluding Hardy | 2021 | International                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 121 $ 54                
Excluding Hardy | 2022 | International                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net $ 45                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (International - Excluding Hardy - Net Strengthening or Releasing of Prior Accident Year Reserves) (Details) - Excluding Hardy - International - USD ($)
$ in Millions
12 Months Ended 24 Months Ended 36 Months Ended 48 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
2013                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims $ 1 $ 3 $ (4) $ (8) $ (7) $ (5) $ (19) $ (7) $ 2                 $ (44)
2014                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 6 (9) 1 17 (7) (11) (1) $ 15                 $ 11  
2015                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 0 2 2 (5) (16) (1) $ 15                 $ (3)    
2016                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 2 13 (9) (2) (13) $ 17                 $ 8      
2017                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (11) (5) (7) 20 $ 61                 $ 58        
2018                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 12 (1) 5 $ 17                 $ 33          
2019                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 7 (3) $ 13                 $ 17            
2020                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (10) $ (8)                 $ (18)              
2021                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims $ (11)                 $ (11)                
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (International - Hardy - Net Incurred Claims and Allocated Claim Adjustment Expenses) (Details) - International
$ in Millions
Dec. 31, 2022
USD ($)
claim
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Hardy                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 2,016                  
IBNR 349                  
Hardy | 2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 144 $ 141 $ 142 $ 142 $ 141 $ 138 $ 137 $ 136 $ 143 $ 127
IBNR $ 3                  
Cumulative Number of Claims | claim 7,904,000,000                  
Hardy | 2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 164 165 167 169 168 167 173 180 182  
IBNR $ (4)                  
Cumulative Number of Claims | claim 8,530,000,000                  
Hardy | 2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 177 175 174 172 174 174 175 186    
IBNR $ (2)                  
Cumulative Number of Claims | claim 9,722,000,000                  
Hardy | 2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 216 215 222 220 231 240 224      
IBNR $ 3                  
Cumulative Number of Claims | claim 10,834,000,000                  
Hardy | 2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 249 249 242 241 248 240        
IBNR $ 5                  
Cumulative Number of Claims | claim 13,204,000,000                  
Hardy | 2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 303 303 298 295 264          
IBNR $ 26                  
Cumulative Number of Claims | claim 15,185,000,000                  
Hardy | 2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 221 214 219 216            
IBNR $ 37                  
Cumulative Number of Claims | claim 11,374,000,000                  
Hardy | 2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 191 197 206              
IBNR $ 62                  
Cumulative Number of Claims | claim 6,699,000,000                  
Hardy | 2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 164 174                
IBNR $ 83                  
Cumulative Number of Claims | claim 3,384,000,000                  
Hardy | 2022                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 187                  
IBNR $ 136                  
Cumulative Number of Claims | claim 1,279,000,000                  
Excluding Hardy                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 3,309                  
IBNR 901                  
Excluding Hardy | 2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 235 234 231 235 243 250 255 274 281 $ 279
IBNR $ 11                  
Cumulative Number of Claims | claim 23,971                  
Excluding Hardy | 2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 279 273 282 281 264 271 282 283 $ 268  
IBNR $ 13                  
Cumulative Number of Claims | claim 24,962                  
Excluding Hardy | 2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 277 277 275 273 278 294 295 $ 280    
IBNR $ 22                  
Cumulative Number of Claims | claim 23,372                  
Excluding Hardy | 2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 283 281 268 277 279 292 $ 275      
IBNR $ 29                  
Cumulative Number of Claims | claim 17,813                  
Excluding Hardy | 2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 348 359 364 371 351 $ 290        
IBNR $ 57                  
Cumulative Number of Claims | claim 18,498                  
Excluding Hardy | 2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 390 378 379 374 $ 357          
IBNR $ 67                  
Cumulative Number of Claims | claim 20,849                  
Excluding Hardy | 2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 348 341 344 $ 331            
IBNR $ 69                  
Cumulative Number of Claims | claim 18,354                  
Excluding Hardy | 2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 350 360 $ 368              
IBNR $ 138                  
Cumulative Number of Claims | claim 14,952                  
Excluding Hardy | 2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 385 $ 396                
IBNR $ 201                  
Cumulative Number of Claims | claim 13,580                  
Excluding Hardy | 2022                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 414                  
IBNR $ 294                  
Cumulative Number of Claims | claim 8,320                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (International - Hardy - Net Cumulative Paid Claim and Claim Adjustment Expenses) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,908 $ 19,205 $ 18,701 $ 17,885            
International                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses 2,003 1,940                
Hardy | International                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 1,462                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 554                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2013 0                  
Liability for unallocated claim adjustment expenses for accident years presented 8                  
Total net liability for unpaid claim and claim adjustment expenses 562                  
Hardy | International | 2013                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 139 138 136 135 $ 131 $ 129 $ 125 $ 119 $ 99 $ 37
Hardy | International | 2014                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 162 161 160 159 153 148 139 121 $ 55  
Hardy | International | 2015                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 168 159 161 153 142 127 96 $ 29    
Hardy | International | 2016                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 202 202 191 178 169 143 $ 62      
Hardy | International | 2017                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 222 210 203 181 149 $ 52        
Hardy | International | 2018                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 246 229 198 170 $ 54          
Hardy | International | 2019                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 155 138 101 $ 43            
Hardy | International | 2020                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 102 76 $ 27              
Hardy | International | 2021                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 43 $ 13                
Hardy | International | 2022                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net $ 23                  
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (International - Hardy - Net Strengthening or Releasing of Prior Accident Year Reserves) (Details) - International - Hardy - USD ($)
$ in Millions
12 Months Ended 24 Months Ended 36 Months Ended 48 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2022
2013                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims $ 3 $ (1) $ 0 $ 1 $ 3 $ 1 $ 1 $ (7) $ 16                 $ 17
2014                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (1) (2) (2) 1 1 (6) (7) $ (2)                 $ (18)  
2015                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 2 1 2 (2) 0 (1) $ (11)                 $ (9)    
2016                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 1 (7) 2 (11) (9) $ 16                 $ (8)      
2017                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 0 7 1 (7) $ 8                 $ 9        
2018                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 0 5 3 $ 31                 $ 39          
2019                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 7 (5) $ 3                 $ 5            
2020                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (6) $ (9)                 $ (15)              
2021                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims $ (10)                 $ (10)                
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Historical Claims Duration) (Details)
Dec. 31, 2022
Medical Professional Liability | Specialty  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 3.60%
Year 2 17.00%
Year 3 23.00%
Year 4 18.00%
Year 5 11.90%
Year 6 8.20%
Year 7 4.70%
Year 8 2.30%
Year 9 1.00%
Year 10 0.90%
Other Professional Liability and Management Liability | Specialty  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 6.60%
Year 2 21.00%
Year 3 20.70%
Year 4 16.20%
Year 5 10.30%
Year 6 6.00%
Year 7 4.30%
Year 8 4.80%
Year 9 1.40%
Year 10 0.50%
Surety | Specialty  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 19.00%
Year 2 40.50%
Year 3 20.20%
Year 4 3.60%
Year 5 2.10%
Year 6 4.80%
Year 7 (1.70%)
Year 8 0.40%
Year 9 (0.60%)
Year 10 0.00%
Commercial Auto | Commercial  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 26.10%
Year 2 22.00%
Year 3 17.60%
Year 4 13.90%
Year 5 10.40%
Year 6 4.80%
Year 7 1.70%
Year 8 0.50%
Year 9 0.00%
Year 10 0.00%
General Liability | Commercial  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 3.90%
Year 2 13.70%
Year 3 17.10%
Year 4 18.80%
Year 5 14.30%
Year 6 9.40%
Year 7 5.70%
Year 8 4.60%
Year 9 2.10%
Year 10 0.60%
Workers' Compensation | Commercial  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 15.30%
Year 2 22.30%
Year 3 13.70%
Year 4 9.40%
Year 5 6.10%
Year 6 2.30%
Year 7 1.10%
Year 8 1.40%
Year 9 1.00%
Year 10 1.10%
Excluding Hardy | International  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 18.30%
Year 2 22.50%
Year 3 10.40%
Year 4 7.10%
Year 5 6.00%
Year 6 6.20%
Year 7 6.70%
Year 8 2.90%
Year 9 2.50%
Year 10 1.30%
Hardy | International  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 19.70%
Year 2 34.00%
Year 3 13.40%
Year 4 7.00%
Year 5 4.40%
Year 6 3.90%
Year 7 0.60%
Year 8 2.10%
Year 9 1.00%
Year 10 0.70%
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Impact of Loss Portfolio Transfer on the Consolidated Statement of Operations) (Details) - Asbestos and Environmental Reserves - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Liability for Claims and Claims Adjustment Expense [Line Items]      
Net A&EP adverse development before consideration of LPT $ 92 $ 143 $ 125
Provision for uncollectible third-party reinsurance on A&EP (5) (5) (25)
Total additional amounts ceded under LPT 87 138 100
Retroactive reinsurance benefit recognized (91) (107) (94)
Pretax impact of deferred retroactive reinsurance $ (4) $ 31 $ 6
v3.22.4
Claim and Claim Adjustment Expense Reserves and Future Policy Benefit Reserves (Life & Group Policyholder Reserves) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Liability for Claims and Claims Adjustment Expense [Abstract]      
Liability for unpaid claims and claims adjustment expense, long term care policies, period increase (decrease) $ (25) $ (40)  
Liability for unpaid claims and claims adjustment expense structured settlement obligations period increase (decrease) (5) 2  
Liability for future policy benefits, gross premium valuation, pretax margin $ 125 $ 72 $ 125
v3.22.4
Legal Proceedings, Contingencies and Guarantees (Narrative) (Details)
$ in Billions
Dec. 31, 2022
USD ($)
Guarantee Obligations  
Legal Proceedings, Commitments and Contingencies, and Guarantees [Line Items]  
Guarantor obligations, maximum exposure, undiscounted $ 1.6
v3.22.4
Reinsurance (Components of Reinsurance Receivables) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reinsurance receivables related to insurance reserves        
Ceded claim and claim adjustment expenses $ 5,191 $ 4,969 $ 4,005 $ 3,835
Ceded future policy benefits 0 288    
Reinsurance receivables related to paid losses 247 227    
Reinsurance receivables 5,438 5,484    
Allowance for uncollectible reinsurance (22) (21)    
Reinsurance receivables, net of allowance for uncollectible reinsurance $ 5,416 $ 5,463    
v3.22.4
Reinsurance (Voluntary Reinsurance) (Details)
$ in Millions
Dec. 31, 2022
USD ($)
Effects of Reinsurance [Line Items]  
Total voluntary reinsurance outstanding balance $ 4,808
A- to A++  
Effects of Reinsurance [Line Items]  
Total voluntary reinsurance outstanding balance 3,785
B- to B++  
Effects of Reinsurance [Line Items]  
Total voluntary reinsurance outstanding balance 1,020
Insolvent  
Effects of Reinsurance [Line Items]  
Total voluntary reinsurance outstanding balance $ 3
v3.22.4
Reinsurance (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Feb. 05, 2021
Ceded Credit Risk [Line Items]        
Funds held under reinsurance agreements, liability $ 3,700 $ 4,000   $ 690
Largest recoverable from single reinsurer 5,416 5,463    
Reinsurance recoveries reported in insurance claims and policyholders' benefits reported on the Consolidated Statement of Operations 2,631 3,058 $ 3,158  
Subsidiaries of Berkshire Hathaway Group        
Ceded Credit Risk [Line Items]        
Largest recoverable from single reinsurer 1,900      
Cavello Bay Reinsurance Limited        
Ceded Credit Risk [Line Items]        
Largest recoverable from single reinsurer 598      
Gateway Rivers Insurance Company        
Ceded Credit Risk [Line Items]        
Largest recoverable from single reinsurer 446      
Significant Captive Program        
Ceded Credit Risk [Line Items]        
Direct and ceded earned premiums 3,270 3,638 3,543  
Reinsurance recoveries reported in insurance claims and policyholders' benefits reported on the Consolidated Statement of Operations $ 1,796 $ 2,003 $ 2,375  
v3.22.4
Reinsurance (Components of Earned Premiums) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Premiums Earned, Net [Abstract]      
Direct $ 13,524 $ 12,997 $ 12,001
Assumed 277 288 288
Ceded 5,134 5,110 4,640
Net 8,667 8,175 7,649
Property and casualty      
Premiums Earned, Net [Abstract]      
Direct 13,097 12,554 11,547
Assumed 231 240 238
Ceded 5,134 5,110 4,640
Net 8,194 7,684 7,145
Long term care      
Premiums Earned, Net [Abstract]      
Direct 427 443 454
Assumed 46 48 50
Ceded 0 0 0
Net $ 473 $ 491 $ 504
Percentage of assumed premiums earned to net premiums earned      
Premiums Earned, Net [Abstract]      
Assumed/ Net % 3.20% 3.50% 3.80%
Percentage of assumed premiums earned to net premiums earned | Property and casualty      
Premiums Earned, Net [Abstract]      
Assumed/ Net % 2.80% 3.10% 3.30%
Percentage of assumed premiums earned to net premiums earned | Long term care      
Premiums Earned, Net [Abstract]      
Assumed/ Net % 9.70% 9.80% 9.90%
v3.22.4
Reinsurance (Components of Written Premiums) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Premiums Written, Net [Abstract]      
Direct $ 14,264 $ 13,587 $ 12,612
Assumed 281 303 279
Ceded 5,417 5,485 4,832
Net 9,128 8,405 8,059
Property and casualty      
Premiums Written, Net [Abstract]      
Direct 13,843 13,150 12,168
Assumed 235 255 229
Ceded 5,417 5,485 4,832
Net 8,661 7,920 7,565
Long term care      
Premiums Written, Net [Abstract]      
Direct 421 437 444
Assumed 46 48 50
Ceded 0 0 0
Net $ 467 $ 485 $ 494
Percentage of assumed premiums written to net premiums written      
Premiums Written, Net [Abstract]      
Assumed/ Net % 3.10% 3.60% 3.50%
Percentage of assumed premiums written to net premiums written | Property and casualty      
Premiums Written, Net [Abstract]      
Assumed/ Net % 2.70% 3.20% 3.00%
Percentage of assumed premiums written to net premiums written | Long term care      
Premiums Written, Net [Abstract]      
Assumed/ Net % 9.90% 9.90% 10.10%
v3.22.4
Debt (Schedule of debt instruments) (Details) - USD ($)
Dec. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Short term debt $ 243,000,000 $ 0
Long term debt 2,538,000,000 2,779,000,000
Total debt $ 2,781,000,000 2,779,000,000
3.950%, face amount of $550, due May 15, 2024    
Debt Instrument [Line Items]    
Stated interest rate 3.95%  
Face amount $ 550,000,000  
Long term debt $ 549,000,000 549,000,000
4.500%, face amount of $500, due March 1, 2026    
Debt Instrument [Line Items]    
Stated interest rate 4.50%  
Face amount $ 500,000,000  
Long term debt $ 499,000,000 499,000,000
3.450%, face amount of $500, due August 15, 2027    
Debt Instrument [Line Items]    
Stated interest rate 3.45%  
Face amount $ 500,000,000  
Long term debt $ 497,000,000 497,000,000
3.900%, face amount of $500, due May 1, 2029    
Debt Instrument [Line Items]    
Stated interest rate 3.90%  
Face amount $ 500,000,000  
Long term debt $ 497,000,000 496,000,000
2.050%, face amount of $500, due August 15, 2030    
Debt Instrument [Line Items]    
Stated interest rate 2.05%  
Face amount $ 500,000,000  
Long term debt 496,000,000 495,000,000
Debenture of CNAF, 7.250%, face amount of $243, due November 15, 2023    
Debt Instrument [Line Items]    
Long term debt $ 0 243,000,000
Debenture of CNAF, 7.250%, face amount of $243, due November 15, 2023    
Debt Instrument [Line Items]    
Stated interest rate 7.25%  
Face amount $ 243,000,000  
Short term debt $ 243,000,000 $ 0
v3.22.4
Debt (Narrative) (Details)
12 Months Ended
Dec. 31, 2019
USD ($)
extensionTerm
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Debt Disclosure [Abstract]      
Federal Home Loan Bank stock   $ 5,000,000  
Federal Home Loan Bank, advances, general debt obligations, maximum amount available   106,000,000  
Federal Home Loan Bank, advances, branch of FHLB Bank, amount of advances   0 $ 0
Debt instrument, term 5 years    
Line of credit, current borrowing capacity $ 250,000,000    
Additional borrowing capacity available $ 100,000,000    
Number of extension options | extensionTerm 2    
Extension term 1 year    
Line of credit, minimum net worth required for compliance   8,700,000,000  
Line of credit, amount outstanding   $ 0 $ 0
v3.22.4
Debt (Maturity of debt) (Details)
$ in Millions
Dec. 31, 2022
USD ($)
Debt Disclosure [Abstract]  
2023 $ 243
2024 550
2025 0
2026 500
2027 500
Thereafter 1,000
Less: discount (12)
Total $ 2,781
v3.22.4
Benefit Plans (Funded Status) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Changes in benefit obligation:      
Actuarial (gain) loss $ (514) $ (84)  
Pension Benefits      
Changes in benefit obligation:      
Balance at beginning of period 2,561 2,769  
Interest cost 67 62 $ 80
Participants' contributions 0 0  
Actuarial (gain) loss (514) (84)  
Benefits paid (171) (182)  
Foreign currency translation and other (12) (2)  
Settlements 0 (2)  
Balance at end of period 1,931 2,561 2,769
Change in plan assets:      
Balance beginning of period 2,577 2,420  
Actual return on plan assets (374) 332  
Company contributions 7 10  
Participants' contributions 0 0  
Benefits paid (171) (182)  
Foreign currency translation and other (14) (1)  
Settlements 0 (2)  
Balance end of period 2,025 2,577 2,420
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]      
Funded status 94 16  
Amounts recognized on the Consolidated Balance Sheets as of December 31:      
Other assets 143 77  
Other liabilities (49) (61)  
Net amount recognized 94 16  
Amounts recognized in Accumulated other comprehensive income, not yet recognized in net periodic cost (benefit):      
Net actuarial (gain) loss 743 763  
Net amount recognized 743 763  
Postretirement Benefits      
Changes in benefit obligation:      
Balance at beginning of period 6 7  
Interest cost 0 0  
Participants' contributions 2 3  
Actuarial (gain) loss 0 1  
Benefits paid (4) (5)  
Foreign currency translation and other 0 0  
Settlements 0 0  
Balance at end of period 4 6 7
Change in plan assets:      
Balance beginning of period 0 0  
Actual return on plan assets 0 0  
Company contributions 2 2  
Participants' contributions 2 3  
Benefits paid (4) (5)  
Foreign currency translation and other 0 0  
Settlements 0 0  
Balance end of period 0 0 $ 0
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]      
Funded status (4) (6)  
Amounts recognized on the Consolidated Balance Sheets as of December 31:      
Other assets 0 0  
Other liabilities (4) (6)  
Net amount recognized (4) (6)  
Amounts recognized in Accumulated other comprehensive income, not yet recognized in net periodic cost (benefit):      
Net actuarial (gain) loss 1 1  
Net amount recognized $ 1 $ 1  
v3.22.4
Benefit Plans (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Actuarial (gain) loss $ (514) $ (84)  
Defined benefit plan, plan with accumulated benefit obligation in excess of plan assets, accumulated benefit obligation 49 $ 61  
Defined benefit plan, plan with accumulated benefit obligation in excess of plan assets, plan assets $ 0    
Assumptions used in calculating assumed health care cost trend rate 4.00%    
Future capital call commitments for limited partnership investments $ 120    
Percentage of limited partnerships employing hedge fund strategies focused on fixed income and equity investments 24.00% 32.00%  
Defined contribution plan, maximum annual contributions per employee, percent 50.00%    
Defined contribution plan, employer matching contribution, percent of match 100.00%    
Defined contribution plan, employer matching contribution, percent of employees' gross pay 6.00%    
Company contribution of eligible compensation, depending on age, percent 5.00%    
Defined contribution plan, employers matching contribution, vesting period in years 5 years    
Benefit expense for the Company's savings plan $ 71 $ 65 $ 70
Pension Benefits      
Defined benefit plan, accumulated benefit obligation 1,931 2,561  
Actuarial (gain) loss $ (514) $ (84)  
Percentage of limited partnerships invested in private debt and equity 62.00% 35.00%  
Percentage of limited partnerships employing hedge fund strategies focused on fixed income and equity investments 38.00% 65.00%  
Defined benefit plan, expected future employer contributions, next fiscal year $ 6    
Postretirement Benefits      
Actuarial (gain) loss $ 0 $ 1  
Defined benefit plan, health care cost trend rate assumed for next fiscal year 4.00% 4.00% 4.00%
Defined benefit plan, expected future employer contributions, next fiscal year $ 1    
Minimum      
Defined benefit plan, plan assets, target allocation, percentage 0.00%    
Maximum      
Defined benefit plan, plan assets, target allocation, percentage 40.00%    
v3.22.4
Benefit Plans (Components of Net Periodic Cost (Benefit)) (Details) - Pension Benefits - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]      
Interest cost on projected benefit obligation $ 67 $ 62 $ 80
Expected return on plan assets (152) (154) (155)
Amortization of net actuarial loss (gain) 30 46 45
Settlement loss 0 1 3
Total net periodic pension cost (benefit) $ (55) $ (45) $ (27)
v3.22.4
Benefit Plans (Schedule of Non-Service Cost (Benefit) Presented in the Consolidated Statement of Operations) (Details) - Pension Benefits - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Net periodic defined benefits expense (reversal of expense), excluding service cost component $ (55) $ (45) $ (27)
Insurance claims and policyholder's benefits      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Net periodic defined benefits expense (reversal of expense), excluding service cost component (15) (13) (8)
Other operating expenses      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Net periodic defined benefits expense (reversal of expense), excluding service cost component $ (40) $ (32) $ (19)
v3.22.4
Benefit Plans (Schedule of Amounts Recognized in Other Comprehensive Income) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Retirement Benefits [Abstract]      
Amounts arising during the period $ (12) $ 262 $ (67)
Settlement 0 1 3
Reclassification adjustment relating to prior service credit 0 0 0
Reclassification adjustment relating to actuarial loss 30 46 45
Total increase (decrease) in Other comprehensive income $ 18 $ 309 $ (19)
v3.22.4
Benefit Plans (Actuarial Assumptions for Benefit Obligations) (Details)
Dec. 31, 2022
Dec. 31, 2021
Pension Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 5.35% 2.75%
Interest crediting rate 3.50% 3.00%
Postretirement Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 5.25% 2.25%
v3.22.4
Benefit Plans (Actuarial Assumptions for Net Cost or Benefit) (Details)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 2.75% 2.35% 3.15%
Expected long term rate of return 6.25% 6.75% 7.25%
Interest crediting rate 3.00% 3.00% 5.00%
Postretirement Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 2.25% 1.60% 2.30%
v3.22.4
Benefit Plans (Fair Value of Plan Assets Measured on a Recurring Basis) (Details) - Pension Benefits - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 2,025 $ 2,577 $ 2,420
Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,025 2,577  
Total | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,470 1,719  
Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 363 777  
Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,091 934  
Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 16 8  
Fair Value Measured at Net Asset Value Per Share | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 534 838  
Fair Value Measured at Net Asset Value Per Share | Fair Value, Recurring | Equity Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 21 20  
Total fixed maturity securities | Total | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,081 793  
Total fixed maturity securities | Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Total fixed maturity securities | Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,065 785  
Total fixed maturity securities | Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 16 8  
Corporate and other bonds | Total | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 866 653  
Corporate and other bonds | Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Corporate and other bonds | Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 859 645  
Corporate and other bonds | Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7 8  
States, municipalities and political subdivisions | Total | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 49 30  
States, municipalities and political subdivisions | Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
States, municipalities and political subdivisions | Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 49 30  
States, municipalities and political subdivisions | Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Asset-backed | Total | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 166 110  
Asset-backed | Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Asset-backed | Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 157 110  
Asset-backed | Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 9 0  
Equity securities | Total | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 231 873  
Equity securities | Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 218 732  
Equity securities | Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 13 141  
Equity securities | Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Short term investments | Total | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 146 45  
Short term investments | Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 145 45  
Short term investments | Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 0  
Short term investments | Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Other assets | Total | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 12 8  
Other assets | Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Other assets | Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 12 8  
Other assets | Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Cash | Total | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Cash | Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Cash | Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Cash | Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
v3.22.4
Benefit Plans (Estimated Future Minimum Benefit Payments to Participants) (Details)
$ in Millions
Dec. 31, 2022
USD ($)
Pension Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2023 $ 175
2024 173
2025 171
2026 169
2027 167
2028-2032 752
Postretirement Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2023 1
2024 1
2025 0
2026 0
2027 0
2028-2032 $ 1
v3.22.4
Stock-Based Compensation (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized (in shares) 16,000,000    
Number of shares available for grant (in shares) 4,800,000    
Measurement period of specific annual performance goals, in years 1 year    
Cliff vesting period following date of grant 2 years    
Allocated share-based compensation expense $ 36 $ 32 $ 37
Tax benefit from compensation expense 8 6 6
Compensation cost not yet recognized $ 44    
Compensation cost not yet recognized, period for recognition 1 year 8 months 12 days    
Share-based compensation arrangement by share-based payment award, equity instruments other than options, vested in period, fair value $ 35 $ 36 $ 35
Weighted average grant date fair value of awards granted (in usd per share) $ 46.78 $ 45.82 $ 34.36
Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage 0.00%    
Award vesting period 1 year    
Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage 200.00%    
Award vesting period 3 years    
v3.22.4
Stock-Based Compensation (Restricted shares, performance-based restricted share units and performance share unit activity) (Details) - $ / shares
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Number of Awards      
Balance as of beginning of period (in shares) 2,375,598    
Awards granted (in shares) 1,031,729    
Awards vested (in shares) (759,352)    
Awards forfeited, canceled or expired (in shares) (305,321)    
Performance-based adjustment (in shares) 123,098    
Balance as of end of period (in shares) 2,465,752 2,375,598  
Weighted Average Grant Date Fair Value      
Balance at beginning of period (in dollars per share) $ 41.21    
Awards granted (in dollars per share) 46.78 $ 45.82 $ 34.36
Awards vested (in dollars per share) 43.69    
Awards forfeited, canceled or expired (in dollars per share) 40.71    
Performance-based adjustment (in dollars per share) 46.79    
Balance at end of period (in dollars per share) $ 43.10 $ 41.21  
v3.22.4
Other Intangible Assets (Summary of Other Intangible Assets) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Schedule of Other Intangible Assets [Abstract]    
Finite-lived intangible assets: $ 16 $ 18
Indefinite-lived intangible assets: 68 63
Total other intangible assets 84 81
Accumulated Amortization 13 14
Syndicate capacity    
Schedule of Other Intangible Assets [Abstract]    
Indefinite-lived intangible assets: 42 47
Agency force    
Schedule of Other Intangible Assets [Abstract]    
Indefinite-lived intangible assets: 16 16
Insurance licenses    
Schedule of Other Intangible Assets [Abstract]    
Indefinite-lived intangible assets: $ 10 0
Trade name    
Schedule of Other Intangible Assets [Abstract]    
Economic Useful Life 8 years  
Finite-lived intangible assets: $ 6 7
Accumulated Amortization $ 6 7
Distribution channel    
Schedule of Other Intangible Assets [Abstract]    
Economic Useful Life 15 years  
Finite-lived intangible assets: $ 10 11
Accumulated Amortization $ 7 $ 7
v3.22.4
Other Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]      
2023 $ 1    
2024 1    
2025 1    
2026 1    
2027 1    
Other Intangible Assets | International      
Finite-Lived Intangible Assets [Line Items]      
Amortization expense included in other operating expenses $ 1 $ 1 $ 1
v3.22.4
Leases (Narrative) (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Leases [Abstract]      
Lease expense $ 59 $ 57 $ 57
Operating lease, cost 36 38 38
Variable lease, cost 23 19 19
Operating lease, payments 42 44 41
Right-of-use asset obtained in exchange for operating lease liability $ 20 $ 11 $ 6
v3.22.4
Leases (Assets and Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Leases [Abstract]    
Operating lease ROU assets $ 155 $ 175
Operating lease liabilities $ 220 $ 248
v3.22.4
Leases (Maturities) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Leases [Abstract]    
2023 $ 39  
2024 33  
2025 26  
2026 23  
2027 22  
Thereafter 118  
Total lease payments 261  
Less: Discount (41)  
Total operating lease liabilities $ 220 $ 248
v3.22.4
Leases (Lease Term and Discount Rate) (Details)
Dec. 31, 2022
Dec. 31, 2021
Leases [Abstract]    
Weighted average remaining lease term 9 years 2 months 12 days 9 years 9 months 18 days
Weighted average discount rate 3.40% 3.40%
v3.22.4
Stockholders' Equity and Statutory Accounting Practices (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Stockholders' Equity and Statutory Accounting Practices [Abstract]    
Increase in statutory capital and surplus due to prescribed practice $ 74 $ 67
Statutory amount available for dividend payment before consideration of statutory dividends paid in the preceding twelve months 1,057  
Dividends paid in the preceding twelve months $ 990  
Statutory accounting practices, statutory capital and surplus, percentage of action level risk based capital 238.00% 264.00%
v3.22.4
Stockholders' Equity and Statutory Accounting Practices (Combined statutory capital and surplus and net income (loss)) (Details) - Combined Continental Casualty Companies - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Statutory Accounting Practices [Line Items]      
Statutory Capital and Surplus $ 10,572 $ 11,321  
Statutory Net Income (Loss) $ 1,072 $ 1,253 $ 800
v3.22.4
Accumulated Other Comprehensive Income (Loss) by Component (Schedule of Accumulated Other Comprehensive Income (Loss) by Component) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Total stockholder's equity at beginning of period $ 12,809 $ 12,707
Other comprehensive income (loss) before reclassifications (4,022) (444)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (145) 39
Other comprehensive income (loss) after tax (expense) benefit (3,877) (483)
Total stockholder's equity at end of period 8,825 12,809
Reclassification from AOCI, tax 26 (10)
Tax (expense) benefit on other comprehensive income (loss) 1,005 124
Accumulated other comprehensive income (loss)    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Total stockholder's equity at beginning of period 320 803
Total stockholder's equity at end of period (3,557) 320
Net unrealized gains (losses) on investments | Net unrealized gains (losses) on investments with an allowance for credit losses    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Total stockholder's equity at beginning of period (2) 0
Other comprehensive income (loss) before reclassifications 0 (7)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax 5 (5)
Other comprehensive income (loss) after tax (expense) benefit (5) (2)
Total stockholder's equity at end of period (7) (2)
Reclassification from AOCI, tax (1) 1
Tax (expense) benefit on other comprehensive income (loss) 1 1
Net unrealized gains (losses) on investments | Net unrealized gains (losses) on other investments    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Total stockholder's equity at beginning of period 1,039 1,745
Other comprehensive income (loss) before reclassifications (3,903) (625)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (126) 81
Other comprehensive income (loss) after tax (expense) benefit (3,777) (706)
Total stockholder's equity at end of period (2,738) 1,039
Reclassification from AOCI, tax 21 (21)
Tax (expense) benefit on other comprehensive income (loss) 1,007 188
Pension and postretirement benefits    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Total stockholder's equity at beginning of period (604) (848)
Other comprehensive income (loss) before reclassifications (11) 207
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (24) (37)
Other comprehensive income (loss) after tax (expense) benefit 13 244
Total stockholder's equity at end of period (591) (604)
Reclassification from AOCI, tax 6 10
Tax (expense) benefit on other comprehensive income (loss) (3) (65)
Cumulative foreign currency translation adjustment    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Total stockholder's equity at beginning of period (113) (94)
Other comprehensive income (loss) before reclassifications (108) (19)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax 0 0
Other comprehensive income (loss) after tax (expense) benefit (108) (19)
Total stockholder's equity at end of period (221) (113)
Reclassification from AOCI, tax 0 0
Tax (expense) benefit on other comprehensive income (loss) $ 0 $ 0
v3.22.4
Business Segments (Narrative) (Details) - segment
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting Information [Line Items]      
Percentage of direct foreign written premiums 10.00% 10.00% 9.00%
Core Segments - Specialty, Commercial and International      
Segment Reporting Information [Line Items]      
Number of operating segments 3    
Non-Core Segments - Life & Group and Corporate & Other      
Segment Reporting Information [Line Items]      
Number of operating segments 2    
v3.22.4
Business Segments (Income Statement Information) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting Information [Line Items]      
Net written premiums $ 9,128 $ 8,405 $ 8,059
Operating revenues      
Net earned premiums 8,667 8,175 7,649
Net investment income 1,805 2,159 1,935
Non-insurance warranty revenue 1,574 1,430 1,252
Other revenues 32 24 26
Total operating revenues 12,078 11,788 10,862
Claims, Benefits and Expenses      
Net incurred claims and benefits 6,361 6,327 6,149
Policyholders’ dividends 25 22 21
Amortization of deferred acquisition costs 1,490 1,443 1,410
Non-insurance warranty expense 1,471 1,328 1,159
Other insurance related expenses 1,160 1,062 1,028
Other expenses 291 242 220
Total claims, benefits and expenses 10,798 10,424 9,987
Core income (loss) before income tax 1,280 1,364 875
Income tax (expense) benefit on core income (loss) (232) (258) (140)
Core income (loss)  1,048 1,106 735
Net investment gains (losses) (199) 120 (54)
Income tax (expense) benefit on net investment gains (losses) 45 (24) 9
Net investment gains (losses), after tax (154) 96 (45)
Net income (loss) 894 1,202 690
Operating Segments | Specialty      
Segment Reporting Information [Line Items]      
Net written premiums 3,306 3,225 3,040
Operating revenues      
Net earned premiums 3,203 3,076 2,883
Net investment income 431 497 449
Non-insurance warranty revenue 1,574 1,430 1,252
Other revenues 1 1 1
Total operating revenues 5,209 5,004 4,585
Claims, Benefits and Expenses      
Net incurred claims and benefits 1,839 1,787 1,792
Policyholders’ dividends 6 3 3
Amortization of deferred acquisition costs 656 643 621
Non-insurance warranty expense 1,471 1,328 1,159
Other insurance related expenses 336 296 280
Other expenses 51 47 50
Total claims, benefits and expenses 4,359 4,104 3,905
Core income (loss) before income tax 850 900 680
Income tax (expense) benefit on core income (loss) (182) (196) (145)
Core income (loss)  668 704 535
Operating Segments | Commercial      
Segment Reporting Information [Line Items]      
Net written premiums 4,193 3,595 3,565
Operating revenues      
Net earned premiums 3,923 3,552 3,323
Net investment income 488 624 513
Non-insurance warranty revenue 0 0 0
Other revenues 30 23 25
Total operating revenues 4,441 4,199 3,861
Claims, Benefits and Expenses      
Net incurred claims and benefits 2,607 2,540 2,375
Policyholders’ dividends 19 19 18
Amortization of deferred acquisition costs 634 594 592
Non-insurance warranty expense 0 0 0
Other insurance related expenses 557 511 506
Other expenses 36 38 34
Total claims, benefits and expenses 3,853 3,702 3,525
Core income (loss) before income tax 588 497 336
Income tax (expense) benefit on core income (loss) (122) (103) (69)
Core income (loss)  466 394 267
Operating Segments | International      
Segment Reporting Information [Line Items]      
Net written premiums 1,164 1,101 961
Operating revenues      
Net earned premiums 1,070 1,057 940
Net investment income 63 57 58
Non-insurance warranty revenue 0 0 0
Other revenues 1 0 0
Total operating revenues 1,134 1,114 998
Claims, Benefits and Expenses      
Net incurred claims and benefits 637 652 629
Policyholders’ dividends 0 0 0
Amortization of deferred acquisition costs 200 206 197
Non-insurance warranty expense 0 0 0
Other insurance related expenses 146 144 136
Other expenses 26 (2) (7)
Total claims, benefits and expenses 1,009 1,000 955
Core income (loss) before income tax 125 114 43
Income tax (expense) benefit on core income (loss) (19) (28) (5)
Core income (loss)  106 86 38
Operating Segments | Life & Group      
Segment Reporting Information [Line Items]      
Net written premiums 467 485 494
Operating revenues      
Net earned premiums 473 491 504
Net investment income 804 966 851
Non-insurance warranty revenue 0 0 0
Other revenues (1) 0 0
Total operating revenues 1,276 1,457 1,355
Claims, Benefits and Expenses      
Net incurred claims and benefits 1,202 1,239 1,286
Policyholders’ dividends 0 0 0
Amortization of deferred acquisition costs 0 0 0
Non-insurance warranty expense 0 0 0
Other insurance related expenses 118 103 109
Other expenses 9 10 7
Total claims, benefits and expenses 1,329 1,352 1,402
Core income (loss) before income tax (53) 105 (47)
Income tax (expense) benefit on core income (loss) 44 21 56
Core income (loss)  (9) 126 9
Operating Segments | Corporate & Other      
Segment Reporting Information [Line Items]      
Net written premiums (1) 0 0
Operating revenues      
Net earned premiums (1) 0 0
Net investment income 19 15 64
Non-insurance warranty revenue 0 0 0
Other revenues 6 6 5
Total operating revenues 24 21 69
Claims, Benefits and Expenses      
Net incurred claims and benefits 76 109 67
Policyholders’ dividends 0 0 0
Amortization of deferred acquisition costs 0 0 0
Non-insurance warranty expense 0 0 0
Other insurance related expenses 4 9 (2)
Other expenses 174 155 141
Total claims, benefits and expenses 254 273 206
Core income (loss) before income tax (230) (252) (137)
Income tax (expense) benefit on core income (loss) 47 48 23
Core income (loss)  (183) (204) (114)
Eliminations      
Segment Reporting Information [Line Items]      
Net written premiums (1) (1) (1)
Operating revenues      
Net earned premiums (1) (1) (1)
Net investment income 0 0 0
Non-insurance warranty revenue 0 0 0
Other revenues (5) (6) (5)
Total operating revenues (6) (7) (6)
Claims, Benefits and Expenses      
Net incurred claims and benefits 0 0 0
Policyholders’ dividends 0 0 0
Amortization of deferred acquisition costs 0 0 0
Non-insurance warranty expense 0 0 0
Other insurance related expenses (1) (1) (1)
Other expenses (5) (6) (5)
Total claims, benefits and expenses (6) (7) (6)
Core income (loss) before income tax 0 0 0
Income tax (expense) benefit on core income (loss) 0 0 0
Core income (loss)  $ 0 $ 0 $ 0
v3.22.4
Business Segments (Balance Sheet Information) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Segment Reporting Information [Line Items]    
Reinsurance receivables $ 5,438 $ 5,484
Insurance receivables 3,187 2,974
Deferred acquisition costs 806 737
Goodwill 144 148
Deferred non-insurance warranty acquisition expense 3,671 3,476
Insurance reserves    
Claim and claim adjustment expenses 25,099 24,174
Unearned premiums 6,374 5,761
Future policy benefits 10,151 13,236
Deferred non-insurance warranty revenue 4,714 4,503
Operating Segments | Specialty    
Segment Reporting Information [Line Items]    
Reinsurance receivables 1,384 1,200
Insurance receivables 1,082 1,136
Deferred acquisition costs 381 363
Goodwill 117 117
Deferred non-insurance warranty acquisition expense 3,671 3,476
Insurance reserves    
Claim and claim adjustment expenses 6,878 6,433
Unearned premiums 3,193 3,001
Future policy benefits 0 0
Deferred non-insurance warranty revenue 4,714 4,503
Operating Segments | Commercial    
Segment Reporting Information [Line Items]    
Reinsurance receivables 1,062 923
Insurance receivables 1,728 1,488
Deferred acquisition costs 321 278
Goodwill 0 0
Deferred non-insurance warranty acquisition expense 0 0
Insurance reserves    
Claim and claim adjustment expenses 9,395 8,890
Unearned premiums 2,425 2,066
Future policy benefits 0 0
Deferred non-insurance warranty revenue 0 0
Operating Segments | International    
Segment Reporting Information [Line Items]    
Reinsurance receivables 414 381
Insurance receivables 369 340
Deferred acquisition costs 104 96
Goodwill 27 31
Deferred non-insurance warranty acquisition expense 0 0
Insurance reserves    
Claim and claim adjustment expenses 2,403 2,280
Unearned premiums 653 585
Future policy benefits 0 0
Deferred non-insurance warranty revenue 0 0
Operating Segments | Life & Group    
Segment Reporting Information [Line Items]    
Reinsurance receivables 101 401
Insurance receivables 8 6
Deferred acquisition costs 0 0
Goodwill 0 0
Deferred non-insurance warranty acquisition expense 0 0
Insurance reserves    
Claim and claim adjustment expenses 3,674 3,754
Unearned premiums 103 109
Future policy benefits 10,151 13,236
Deferred non-insurance warranty revenue 0 0
Operating Segments | Corporate & Other    
Segment Reporting Information [Line Items]    
Reinsurance receivables 2,477 2,579
Insurance receivables 0 4
Deferred acquisition costs 0 0
Goodwill 0 0
Deferred non-insurance warranty acquisition expense 0 0
Insurance reserves    
Claim and claim adjustment expenses 2,749 2,817
Unearned premiums 0 0
Future policy benefits 0 0
Deferred non-insurance warranty revenue 0 0
Eliminations    
Segment Reporting Information [Line Items]    
Reinsurance receivables 0 0
Insurance receivables 0 0
Deferred acquisition costs 0 0
Goodwill 0 0
Deferred non-insurance warranty acquisition expense 0 0
Insurance reserves    
Claim and claim adjustment expenses 0 0
Unearned premiums 0 0
Future policy benefits 0 0
Deferred non-insurance warranty revenue $ 0 $ 0
v3.22.4
Business Segments (Revenues by Line of Business) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Total revenues $ 11,879 $ 11,908 $ 10,808
Total operating revenues 12,078 11,788 10,862
Net investment gains (losses) (199) 120 (54)
Operating Segments | Specialty      
Total revenues 5,209 5,004 4,585
Operating Segments | Commercial      
Total revenues 4,441 4,199 3,861
Operating Segments | International      
Total revenues 1,134 1,114 998
Operating Segments | Life & Group      
Total revenues 1,276 1,457 1,355
Operating Segments | Corporate & Other      
Total revenues 24 21 69
Eliminations      
Total revenues (6) (7) (6)
Management & Professional Liability | Operating Segments | Specialty      
Total revenues 2,771 2,776 2,577
Surety | Operating Segments | Specialty      
Total revenues 652 604 596
Warranty & Alternative Risks | Operating Segments | Specialty      
Total revenues 1,786 1,624 1,412
Middle Market | Operating Segments | Commercial      
Total revenues 1,532 1,508 1,444
Construction | Operating Segments | Commercial      
Total revenues 1,421 1,322 1,120
Small Business | Operating Segments | Commercial      
Total revenues 581 558 482
Other Commercial | Operating Segments | Commercial      
Total revenues 907 811 815
Canada | Operating Segments | International      
Total revenues 366 344 291
Europe | Operating Segments | International      
Total revenues 466 473 389
Hardy | Operating Segments | International      
Total revenues $ 302 $ 297 $ 318
v3.22.4
Related Party Transactions Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Due to related parties $ 26 $ 56  
Fees and expenses of investment facilities and services      
Amounts reimbursed to Loews for services provided to the Company 51 47 $ 47
Due to related parties 26 23  
Corporate services and related travel expenses      
Amounts reimbursed to Loews for services provided to the Company 1 1  
Loews      
Due to related parties   33  
Due from related parties 18    
Amounts earned from Loews for insurance premiums $ 3 $ 2 $ 2
v3.22.4
Non-Insurance Revenues from Contracts with Customers (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Revenue from External Customer [Line Items]    
Deferred non-insurance warranty revenue $ 4,714 $ 4,503
Contract with customer, liability, revenue recognized 1,300 1,200
Deferred non-insurance warranty acquisition expense 3,671 3,476
Amortization of deferred sales commissions 1,200 1,100
Capitalized Commission Costs    
Revenue from External Customer [Line Items]    
Deferred non-insurance warranty acquisition expense 3,600 3,500
Capitalized Administrator Service Costs    
Revenue from External Customer [Line Items]    
Deferred non-insurance warranty acquisition expense $ 53 $ 47
v3.22.4
Non-Insurance Revenues from Contracts with Customers (Performance obligation) (Details)
$ in Billions
Dec. 31, 2022
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, amount $ 1.5
Remaining performance obligation, expected timing of satisfaction, period 12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, amount $ 1.1
Remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, amount $ 0.8
Remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, amount $ 1.3
Remaining performance obligation, expected timing of satisfaction, period
v3.22.4
Schedule II. Condensed Financial Information of Registrant (Parent Company) (Schedule of Condensed Financial Information of Registrant, Statements of Operations and Comprehensive Income (Loss)) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Revenues      
Net investment income $ 1,805 $ 2,159 $ 1,935
Net investment (losses) gains (199) 120 (54)
Total revenues 11,879 11,908 10,808
Expenses      
Interest 112 113 122
Income tax benefit (187) (282) (131)
Net income 894 1,202 690
Total comprehensive (loss) income (2,983) 719 1,442
Parent Company      
Revenues      
Net investment income 8 0 3
Net investment (losses) gains 0 0 (20)
Total revenues 8 0 (17)
Expenses      
Administrative and general 1 1 1
Interest 112 112 122
Total expenses 113 113 123
Loss from operations before income taxes and equity in net income of subsidiaries (105) (113) (140)
Income tax benefit 6 11 18
Loss before equity in net income of subsidiaries (99) (102) (122)
Equity in net income of subsidiaries 993 1,304 812
Net income 894 1,202 690
Equity in other comprehensive (loss) income of subsidiaries (3,877) (483) 752
Total comprehensive (loss) income $ (2,983) $ 719 $ 1,442
v3.22.4
Schedule II. Condensed Financial Information of Registrant (Parent Company) (Schedule of Condensed Financial Information of Registrant, Balance Sheets) (Details) - USD ($)
$ / shares in Units, $ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Assets      
Cash $ 475 $ 536  
Total assets 60,927 66,639  
Liabilities      
Short term debt 243 0  
Long term debt 2,538 2,779  
Other liabilities 2,983 3,377  
Total liabilities 52,102 53,830  
Stockholders' Equity      
Common stock ($2.50 par value; 500,000,000 shares authorized; 273,040,243 shares issued; 270,895,902 and 271,363,999 shares outstanding) 683 683  
Additional paid-in capital 2,220 2,215  
Retained earnings 9,572 9,663  
Accumulated other comprehensive (loss) income (3,557) 320  
Treasury stock (2,144,341 and 1,676,244 shares), at cost (93) (72)  
Total stockholders’ equity 8,825 12,809 $ 12,707
Total liabilities and stockholders' equity $ 60,927 $ 66,639  
Balance Sheet Parenthetical      
Common stock, par value (in usd per share) $ 2.50 $ 2.50  
Common stock, shares authorized (in shares 500,000,000 500,000,000  
Common stock, shares issued (in shares) 273,040,243 273,040,243  
Common stock, shares outstanding (in shares) 270,895,902 271,363,999  
Treasury stock, shares (in shares) 2,144,341 1,676,244  
Parent Company      
Assets      
Investment in subsidiaries $ 11,063 $ 14,937  
Cash 2 1  
Short term investments 578 685  
Amounts due from affiliates 4 3  
Total assets 11,647 15,626  
Liabilities      
Short term debt 243 0  
Long term debt 2,538 2,779  
Other liabilities 41 38  
Total liabilities 2,822 2,817  
Stockholders' Equity      
Common stock ($2.50 par value; 500,000,000 shares authorized; 273,040,243 shares issued; 270,895,902 and 271,363,999 shares outstanding) 683 683  
Additional paid-in capital 2,220 2,215  
Retained earnings 9,572 9,663  
Accumulated other comprehensive (loss) income (3,557) 320  
Treasury stock (2,144,341 and 1,676,244 shares), at cost (93) (72)  
Total stockholders’ equity 8,825 12,809  
Total liabilities and stockholders' equity $ 11,647 $ 15,626  
v3.22.4
Schedule II. Condensed Financial Information of Registrant (Parent Company) (Schedule of Condensed Financial Information of Registrant, Statements of Cash Flows) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cash Flows from Operating Activities      
Net income $ 894 $ 1,202 $ 690
Adjustments to reconcile net income to net cash flows provided by operating activities:      
Net investment losses 199 (120) 54
Other, net (192) (76) (145)
Net cash flows provided by operating activities 2,502 1,997 1,775
Cash Flows from Investing Activities      
Change in short term investments 155 (83) (39)
Other, net (10) 1 16
Net cash flows used by investing activities (1,512) (1,228) (705)
Cash Flows from Financing Activities      
Dividends paid to common stockholders (982) (621) (950)
Proceeds from the issuance of debt 0 0 495
Repayment of debt 0 0 (419)
Purchase of treasury stock (39) (18) (18)
Other, net (11) (9) (10)
Net cash flows used by financing activities (1,032) (648) (902)
Net change in cash (61) 117 177
Cash, beginning of year 536 419 242
Cash, end of period 475 536 419
Parent Company      
Cash Flows from Operating Activities      
Net income 894 1,202 690
Adjustments to reconcile net income to net cash flows provided by operating activities:      
Equity in net income of subsidiaries (993) (1,304) (812)
Dividends received from subsidiaries 990 880 975
Net investment losses 0 0 20
Other, net 28 33 26
Net cash flows provided by operating activities 919 811 899
Cash Flows from Investing Activities      
Change in short term investments 114 (163) 2
Capital contributions to subsidiaries 0 0 (1)
Other, net 0 0 0
Net cash flows used by investing activities 114 (163) 1
Cash Flows from Financing Activities      
Dividends paid to common stockholders (982) (621) (950)
Proceeds from the issuance of debt 0 0 495
Repayment of debt 0 0 (419)
Purchase of treasury stock (39) (18) (18)
Other, net (11) (8) (9)
Net cash flows used by financing activities (1,032) (647) (901)
Net change in cash 1 1 (1)
Cash, beginning of year 1 0 1
Cash, end of period $ 2 $ 1 $ 0
v3.22.4
Schedule II. Condensed Financial Information of Registrant (Parent Company) (Narrative) (Details)
Dec. 31, 2022
CNAF Consolidated | Loews  
Condensed Financial Statements, Captions [Line Items]  
Noncontrolling interest, ownership percentage by parent 90.00%
v3.22.4
Schedule V. Valuation and Qualifying Accounts (Schedule of valuation and qualifying accounts) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Mortgage loan receivables      
Movement in valuation allowances and reserves [Roll Forward]      
Balance Beginning of Period $ 16 $ 26 $ 7
Charged to Costs and Expenses 0 0 0
Charged to Other Accounts 8 (10) 19
Deductions 0 0 0
Balance at End of Period 24 16 26
Insurance and reinsurance receivables      
Movement in valuation allowances and reserves [Roll Forward]      
Balance Beginning of Period 50 54 57
Charged to Costs and Expenses 8 4 4
Charged to Other Accounts 0 0 0
Deductions (7) (8) (7)
Balance at End of Period 51 50 54
Fixed maturity securities      
Movement in valuation allowances and reserves [Roll Forward]      
Balance Beginning of Period 18 40 6
Charged to Costs and Expenses 0 0 0
Charged to Other Accounts 4 30 92
Deductions (21) (52) (58)
Balance at End of Period $ 1 $ 18 $ 40
v3.22.4
Schedule VI. Supplemental Information Concerning Property and Casualty Insurance Operations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Incurred claim and claim adjustment expenses related to current year $ 6,243 $ 5,970 $ 5,793
Incurred claim and claim adjustment expenses related to prior years (187) (104) (119)
Consolidated Property and Casualty Insurance Entity      
Deferred acquisition costs 806 737  
Reserves for unpaid claim and claim adjustment expenses 25,099 24,174  
Discount deducted from claim and claim adjustment expense reserves above (based on interest rates ranging from 3.5% to 6.4%) 1,133 1,146  
Unearned premiums 6,374 5,761  
Net written premiums 9,128 8,405 8,059
Net earned premiums 8,667 8,175 7,649
Net investment income 1,751 2,111 1,896
Incurred claim and claim adjustment expenses related to current year   5,970 5,793
Incurred claim and claim adjustment expenses related to prior years   (104) (119)
Amortization of deferred acquisition costs $ 1,490 1,443 1,410
Paid claim and claim adjustment expenses   $ 4,844 $ 5,164
Consolidated Property and Casualty Insurance Entity | Minimum      
Supplemental Information Parenthetical      
SEC Schedule, 12-18, supplemental information, property-casualty insurance underwriters, interest rate at which discount computed 3.50% 3.50%  
Consolidated Property and Casualty Insurance Entity | Maximum      
Supplemental Information Parenthetical      
SEC Schedule, 12-18, supplemental information, property-casualty insurance underwriters, interest rate at which discount computed 6.40% 6.40%