CNA FINANCIAL CORP, 10-K filed on 2/8/2022
Annual Report
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Cover Page - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Feb. 04, 2022
Jun. 30, 2021
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2021    
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)   271,365,221  
Entity Public Float     $ 1,255
Documents Incorporated by Reference Portions of the CNA Financial Corporation Proxy Statement prepared for the 2022 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 2021    
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    
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Audit Information
12 Months Ended
Dec. 31, 2021
Audit Information [Abstract]  
Auditor Name DELOITTE & TOUCHE LLP
Auditor Location Chicago, Illinois
Auditor Firm ID 34
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Consolidated Statements of Operations - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Revenues      
Net earned premiums $ 8,175 $ 7,649 $ 7,428
Net investment income 2,159 1,935 2,118
Net investment gains (losses) 120 (54) 29
Non-insurance warranty revenue 1,430 1,252 1,161
Other revenues 24 26 31
Total revenues 11,908 10,808 10,767
Claims, Benefits and Expenses      
Insurance claims and policyholders’ benefits 6,349 6,170 5,806
Amortization of deferred acquisition costs 1,443 1,410 1,383
Non-insurance warranty expense 1,328 1,159 1,082
Other operating expenses 1,191 1,126 1,142
Interest 113 122 131
Total claims, benefits and expenses 10,424 9,987 9,544
Income before income tax 1,484 821 1,223
Income tax expense (282) (131) (223)
Net income $ 1,202 $ 690 $ 1,000
Basic earnings per share      
Basic earnings per share (in usd per share) $ 4.42 $ 2.54 $ 3.68
Diluted earnings per share      
Diluted earnings per share (in usd per share) $ 4.41 $ 2.53 $ 3.67
Weighted Average Outstanding Common Stock and Common Stock Equivalents      
Basic (in shares) 271.8 271.6 271.6
Diluted (in shares) 272.8 272.4 272.5
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Consolidated Statements of Comprehensive Income (Loss) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Net income $ 1,202 $ 690 $ 1,000
Other Comprehensive Income (Loss), net of tax      
Net unrealized gains and losses on investments (708) 720 948
Foreign currency translation adjustment (19) 47 39
Pension and postretirement benefits 244 (15) (58)
Other comprehensive (loss) income, net of tax (483) 752 929
Total comprehensive income 719 1,442 1,929
Investments      
Other Comprehensive Income (Loss), net of tax      
Net unrealized gains and losses on investments (2) 0 0
Net unrealized gains and losses on other investments      
Other Comprehensive Income (Loss), net of tax      
Net unrealized gains and losses on investments $ (706) $ 720 $ 948
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Consolidated Balance Sheets - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Investments:    
Fixed maturity securities at fair value (amortized cost of $39,952 and $38,953, less allowance for credit loss of $18 and $40) $ 44,380 $ 44,631
Equity securities at fair value (cost of $964 and $941) 1,035 992
Limited partnership investments 1,859 1,619
Other invested assets 91 76
Mortgage loans (less allowance for uncollectible receivables of $16 and $26) 973 1,068
Short term investments 1,990 1,907
Total investments 50,328 50,293
Cash 536 419
Reinsurance receivables (less allowance for uncollectible receivables of $21 and $21) 5,463 4,457
Insurance receivables (less allowance for uncollectible receivables of $29 and $33) 2,945 2,607
Accrued investment income 377 380
Deferred acquisition costs 737 708
Deferred income taxes 142 66
Property and equipment at cost (less accumulated depreciation of $255 and $231) 226 252
Goodwill 148 148
Deferred non-insurance warranty acquisition expense 3,476 3,068
Other assets 2,261 1,628
Total assets 66,639 64,026
Insurance reserves:    
Claim and claim adjustment expenses 24,174 22,706
Unearned premiums 5,761 5,119
Future policy benefits 13,236 13,318
Long term debt 2,779 2,776
Deferred non-insurance warranty revenue 4,503 4,023
Other liabilities (includes $56 and $89 due to Loews Corporation) 3,377 3,377
Total liabilities 53,830 51,319
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; 271,363,999 and 271,391,603 shares outstanding) 683 683
Additional paid-in capital 2,215 2,211
Retained earnings 9,663 9,081
Accumulated other comprehensive income 320 803
Treasury stock (1,676,244 and 1,648,640 shares), at cost (72) (71)
Total stockholders’ equity 12,809 12,707
Total liabilities and stockholders' equity $ 66,639 $ 64,026
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Consolidated Balance Sheets - (Parenthetical) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Fixed maturities securities at amortized cost $ 39,952 $ 38,953
Marketable securities fixed maturities allowance for credit loss 18 40
Equity securities at cost 964 941
Mortgage loans on real estate commercial and consumer allowance for credit loss 16 26
Allowance for uncollectible reinsurance 21 21
Allowance for uncollectible insurance receivables 29 33
Accumulated depreciation on property and equipment 255 231
Due to related parties $ 56 $ 89
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) 271,363,999 271,391,603
Treasury stock, shares (in shares) 1,676,244 1,648,640
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Consolidated Statements of Cash Flows - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash Flows from Operating Activities      
Net income $ 1,202 $ 690 $ 1,000
Adjustments to reconcile net income to net cash flows provided by operating activities:      
Deferred income tax expense (benefit) 47 (49) (46)
Trading portfolio activity 20 (5) (16)
Net investment (gains) losses (120) 54 (29)
Equity method investees (127) (8) 11
Net amortization of investments (81) (67) (89)
Depreciation and amortization 54 60 68
Changes in:      
Receivables, net (1,358) (409) 137
Accrued investment income 3 16 (3)
Deferred acquisition costs (30) (43) (26)
Insurance reserves 2,463 1,681 358
Other, net (76) (145) (225)
Net cash flows provided by operating activities 1,997 1,775 1,140
Dispositions:      
Fixed maturity securities - sales 3,816 5,904 5,842
Fixed maturity securities - maturities, calls and redemptions 4,464 3,760 2,997
Equity securities 316 355 214
Limited partnerships 246 373 479
Mortgage loans 190 74 143
Purchases:      
Fixed maturity securities (9,307) (10,269) (8,661)
Equity securities (304) (452) (186)
Limited partnerships (440) (224) (198)
Mortgage loans (95) (172) (298)
Change in other investments (6) (8) (11)
Change in short term investments (83) (39) (535)
Purchases of property and equipment (26) (23) (26)
Other, net 1 16 15
Net cash flows used by investing activities (1,228) (705) (225)
Cash Flows from Financing Activities      
Dividends paid to common stockholders (621) (950) (929)
Proceeds from the issuance of debt 0 495 496
Repayment of debt 0 (419) (520)
Purchase of treasury stock (18) (18) (23)
Other, net (9) (10) (12)
Net cash flows used by financing activities (648) (902) (988)
Effect of foreign exchange rate changes on cash (4) 9 5
Net change in cash 117 177 (68)
Cash, beginning of year 419 242 310
Cash, end of period $ 536 $ 419 $ 242
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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 Income (Loss)
Treasury Stock
Total stockholder's equity at beginning of period at Dec. 31, 2018   $ 683 $ 2,192 $ 9,277   $ 9,277 $ (878) $ (57)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Stock-based compensation     11         10
Dividends to common stockholders ($2.27, $3.48, and $3.40 per share)       (929)        
Net income $ 1,000     1,000        
Other comprehensive (loss) income 929           929  
Purchase of treasury stock               (23)
Total stockholder's equity at end of period at Dec. 31, 2019 12,215 683 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 ($2.27, $3.48, and $3.40 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 ($2.27, $3.48, and $3.40 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     $ 320 $ (72)
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Consolidated Statements of Stockholders' Equity - (Parenthetical) - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]      
Dividends declared per share (usd per share) $ 2.27 $ 3.48 $ 3.40
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Summary of Significant Accounting Policies
12 Months Ended
Dec. 31, 2021
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 89.6% of the outstanding common stock of CNAF as of December 31, 2021.
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.
Recently Adopted Accounting Standards Updates (ASU)
ASU 2016-13: In June 2016 the Financial Accounting Standards Board (FASB) issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The updated accounting guidance required changes to the recognition of credit losses on financial instruments not accounted for at fair value through the Company’s results of operations. For financial assets measured at cost, the expected credit loss model requires immediate recognition of estimated credit losses over the life of the asset and presentation of the asset at the net amount expected to be collected. This updated guidance applies to mortgage loan investments, reinsurance and insurance receivables and other financing receivables. For available-for-sale fixed maturity securities carried at fair value, estimated credit losses will continue to be measured at the present value of expected cash flows, however, the other than temporary impairment (OTTI) concept has been eliminated. Under the previous guidance, estimated credit impairments resulted in a write-down of amortized cost. Under the updated guidance, estimated credit losses are recognized through an allowance and reversals of the allowance are permitted if the estimate of credit losses declines. For available-for-sale fixed maturity securities where the Company has an intent to sell, impairment will continue to result in a write-down of amortized cost.
On January 1, 2020, the Company adopted the updated guidance using a modified retrospective method with a cumulative effect adjustment recorded to beginning Retained earnings. Prior period amounts have not been adjusted and continue to be reported in accordance with the previous accounting guidance. A prospective transition approach is required for available-for-sale fixed maturity securities that were purchased with credit deterioration (PCD assets) or have recognized an OTTI write-down prior to the effective date. The cumulative effect of the accounting change resulted in a $5 million decrease in Retained earnings, with a corresponding $7 million allowance for credit losses recorded for Mortgage loans partially offset by a $2 million tax impact.
The allowance for uncollectible reinsurance and insurance receivables was unchanged as a result of adopting the updated guidance. At adoption, an allowance for credit losses of $6 million was established for available-for-sale fixed maturity securities that were PCD assets, with a corresponding increase to amortized cost, resulting in no adjustment to the carrying value of the securities.
See the accounting policy discussion within this Note, as well as Notes B and G to the Consolidated Financial Statements for additional information regarding credit losses.
Accounting Standards 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. Entities will be required to update 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. Restatement of prior periods presented is required.
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 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 material decrease in Accumulated other comprehensive income as of the transition date. The requirement to update cash flow assumptions at least annually is expected to change the pattern of earnings emergence 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, related cash flows, or the underlying economics of the business.
The Company continues to make progress in connection with these matters and is in process of refining key accounting policy decisions, technology solutions and updates to internal controls associated with adoption of the new guidance. These in-progress activities include modifications of actuarial valuation systems, data sourcing, analytical procedures and reporting processes.
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 and $1.2 billion as of December 31, 2021 and 2020. 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% and 6.5% as of December 31, 2021 and 2020. As of December 31, 2021 and 2020, the discounted reserves for unfunded structured settlements were $503 million and $520 million, net of discount of $621 million and $657 million. For the years ended December 31, 2021, 2020 and 2019, the amount of interest recognized on the discounted reserves of unfunded structured settlements was $36 million, $35 million and $36 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, 2021 and 2020, workers' compensation lifetime claim reserves are discounted at a 3.5% interest rate. As of December 31, 2021 and 2020, the discounted reserves for workers’ compensation lifetime claim reserves were $228 million and $258 million, net of discount of $97 million and $113 million. For the years ended December 31, 2021, 2020 and 2019, the amount of interest accretion recognized on the discounted reserves of workers’ compensation lifetime claim reserves was $12 million, $15 million and $21 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 5.8% as of December 31, 2021 and 2020. As of December 31, 2021 and 2020, such discounted reserves totaled $2.7 billion, net of discount of $428 million and $439 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, 2021 gross premium valuation (GPV) indicated that recorded reserves included a margin of approximately $72 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% and 5.4% as of December 31, 2021 and 2020.
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, 2021 and 2020, the liability balances were $79 million and $82 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 1% of total net written premiums for each of the years ended December 31, 2021, 2020 and 2019. 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 structured settlements not funded by annuities were realized, or that unrealized gains on fixed maturity securities supporting long term care products 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 through Other comprehensive income (Shadow Adjustments). Shadow Adjustments, net of tax, decreased $296 million and increased $575 million for the years ended December 31, 2021 and 2020, respectively. As of December 31, 2021 and 2020, net unrealized gains on investments included in Accumulated other comprehensive income (AOCI) were correspondingly reduced by Shadow Adjustments of $2,477 million and $2,773 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. Prior to 2020, mortgage loans were evaluated on an individual loan basis considering the collection experience of each loan and other credit quality indicators such as DSCR and the credit-worthiness of the borrower or tenants of credit tenant loan properties. Mortgage loans were considered to be impaired loans and a loss incurred when it was probable that contractual principal and interest payments would not be collected and any impairment losses were recognized as a direct write-down of amortized cost. 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.
Prior to 2020, the Company’s assessment of whether an impairment loss occurred also incorporated both quantitative and qualitative information. Fixed maturity securities in an unrealized loss position that the Company intended to sell, or it more likely than not would be required to sell before recovery of amortized cost, were considered to be impaired and the entire difference between the amortized cost basis and fair value of the security was recognized as an impairment loss in earnings as a direct write-down of amortized cost. The remaining fixed maturity securities in an unrealized loss position were evaluated to determine if a credit loss existed. If a credit loss was determined to exist, the credit loss was recognized in earnings as a direct write-down of amortized cost.
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.
Prior to 2020, the allowance for uncollectible reinsurance and insurance receivables was measured using an incurred loss methodology.
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 less than $(1) million, $13 million and $1 million were included in determining Net income for the years ended December 31, 2021, 2020 and 2019, 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, 2021, 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 the years ended December 31, 2021, 2020 and 2019, approximately 1 million, 770 thousand and 960 thousand 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. For those same periods, 1 thousand, 8 thousand and 1 thousand potential shares attributable to exercises or conversions into common stock under stock-based employee compensation plans were not included in the calculation of diluted earnings per share, because the effect would have been antidilutive.
Supplementary Cash Flow Information
Cash payments made for interest were $110 million, $124 million and $136 million for the years ended December 31, 2021, 2020 and 2019. Cash payments made for income taxes were $278 million, $108 million and $255 million for the years ended December 31, 2021, 2020 and 2019.
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Investments
12 Months Ended
Dec. 31, 2021
Investments [Abstract]  
Investments Investments
The significant components of Net investment income are presented in the following table.
Years ended December 31
(In millions)202120202019
Fixed maturity securities$1,707 $1,728 $1,817 
Equity securities83 65 85 
Limited partnership investments362 121 180 
Mortgage loans61 57 51 
Short term investments34 
Trading portfolio18 
Other— 
Gross investment income2,223 1,999 2,181 
Investment expense(64)(64)(63)
Net investment income$2,159 $1,935 $2,118 
For the years ended December 31, 2021 and 2020, $28 million and $34 million of Net investment income was recognized due to the change in fair value of common stock still held as of December 31, 2021 and 2020.
As of December 31, 2021 and 2020, the Company held less than $1 million of non-income producing fixed maturity securities. As of December 31, 2021 and 2020, the Company held $7 million and $0 of non-income producing mortgage loans. As of December 31, 2021 and 2020, 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)202120202019
Net investment gains (losses):
Fixed maturity securities:
Gross gains$186 $220 $125 
Gross losses(90)(220)(131)
Net investment gains (losses) on fixed maturity securities96 — (6)
Equity securities(3)66 
Derivatives(10)(11)
Mortgage loans10 (21)— 
Short term investments and other(20)(20)
Net investment gains (losses)$120 $(54)$29 
For the years ended December 31, 2021 and 2020, $2 million of gains and $3 million of losses were recognized in Net investment gains (losses) due to the change in fair value of non-redeemable preferred stock still held as of December 31, 2021 and 2020, respectively. 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 and a $21 million loss for the year ended December 31, 2019 related to the redemption of the Company's $500 million senior notes due August 2020.
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 $369 million and $371 million as of December 31, 2021 and 2020 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, 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 
Intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost basis— — — 
Write-offs charged against the allowance16 — 16 
Recoveries of amounts previously written off— — — 
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 
(In millions)Corporate and other bondsAsset-backedTotal
Allowance for credit losses:
Balance as of January 1, 2020$— $— $— 
Additions to the allowance for credit losses:
Impact of adopting ASC 326— 
Securities for which credit losses were not previously recorded67 12 79 
Available-for-sale securities accounted for as PCD assets— 
Reductions to the allowance for credit losses:
Securities sold during the period (realized)22 — 22 
Intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost basis— 
Write-offs charged against the allowance— — — 
Recoveries of amounts previously written off— — — 
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period(32)(27)
Balance as of December 31, 2020
$23 $17 $40 
The components of available-for-sale impairment losses recognized in earnings by asset type are presented in the following table. The table includes losses 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)202120202019
Fixed maturity securities available-for-sale:
Corporate and other bonds$11 $87 $33 
Asset-backed20 24 11 
Impairment (gains) losses recognized in earnings$31 $111 $44 
For the years ended December 31, 2021 and 2020, the Company also recognized $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 investments, which consists solely of the change in unrealized gains on fixed maturity securities, was $(1,272) million, $1,637 million and $2,620 million for the years ended December 31, 2021, 2020 and 2019.
The following tables present a summary of fixed maturity securities.
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 
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 
December 31, 2020Cost 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$20,792 $3,578 $22 $23 $24,325 
States, municipalities and political subdivisions9,729 1,863 — — 11,592 
Asset-backed:
Residential mortgage-backed3,442 146 — 3,587 
Commercial mortgage-backed1,933 93 42 17 1,967 
Other asset-backed2,179 81 — 2,251 
Total asset-backed7,554 320 52 17 7,805 
U.S. Treasury and obligations of government-sponsored enterprises339 — 338 
Foreign government512 32 — — 544 
Total fixed maturity securities available-for-sale38,926 5,795 77 40 44,604 
Total fixed maturity securities trading27 — — — 27 
Total fixed maturity securities$38,953 $5,795 $77 $40 $44,631 
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, 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 
Less than 12 Months12 Months or LongerTotal
December 31, 2020Estimated
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$609 $21 $12 $$621 $22 
States, municipalities and political subdivisions33 — — — 33 — 
Asset-backed:
Residential mortgage-backed71 11 — 82 
Commercial mortgage-backed533 40 28 561 42 
Other asset-backed344 13 — 357 
Total asset-backed948 50 52 1,000 52 
U.S. Treasury and obligations of government-sponsored enterprises63 — — 63 
   Foreign government13 — — — 13 — 
Total$1,666 $74 $64 $$1,730 $77 
Based on current facts and circumstances, the Company believes the unrealized losses presented in the December 31, 2021 securities in a gross unrealized loss position table above are not indicative of the ultimate collectibility of the current amortized cost of the securities, but rather are attributable to changes in interest rates, credit spreads and other factors. 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, 2021.
Contractual Maturity
The following table presents available-for-sale fixed maturity securities by contractual maturity.
December 3120212020
(In millions)Cost or
Amortized
Cost
Estimated
Fair
Value
Cost or
Amortized
Cost
Estimated
Fair
Value
Due in one year or less$1,603 $1,624 $1,456 $1,458 
Due after one year through five years10,637 11,229 12,304 13,098 
Due after five years through ten years13,294 14,338 12,319 13,878 
Due after ten years14,411 17,182 12,847 16,170 
Total$39,945 $44,373 $38,926 $44,604 
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, 2021 and 2020 was $1,859 million and $1,619 million, which includes net undistributed earnings of $266 million and $235 million. Limited partnerships comprising 32% of the total carrying value are reported on a current basis through December 31, 2021 with no reporting lag, 6% 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 68% and 49% of the carrying value as of December 31, 2021 and 2020 were invested in private debt and equity. Limited partnerships comprising 32% and 51% of the carrying value as of December 31, 2021 and 2020 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 $665 million and $775 million as of December 31, 2021 and 2020. 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% and 2% of the aggregate partnership equity as of December 31, 2021 and 2020, and the related income reflected on the Consolidated Statements of Operations represents approximately 2%, 2% and 2% of the changes in aggregate partnership equity for the years ended December 31, 2021, 2020 and 2019.
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, 2021 and 2020.
There was no cash collateral provided by the Company or cash collateral received from counterparties as of December 31, 2021 or 2020.
The Company holds an embedded derivative on a funds withheld liability with a notional value of $270 million and $190 million and a fair value of $(12) million and $(19) million as of December 31, 2021 and 2020. The embedded derivative on the funds withheld liability is accounted for separately and reported with the funds withheld liability in Other liabilities on the Consolidated Balance Sheets.
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, 2021, the Company had commitments to purchase or fund approximately $1,230 million and sell approximately $90 million under the terms of these investments.
Investments on Deposit
Securities with carrying values of approximately $3.0 billion were deposited by the Company’s insurance subsidiaries under requirements of regulatory authorities and others as of December 31, 2021 and 2020.
Cash and securities with carrying values of approximately $1.2 billion and $1.1 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, 2021 and 2020.
Mortgage Loans
The following table presents the amortized cost basis of mortgage loans for each credit quality indicator by year of origination.
December 31, 2021
Mortgage Loans Amortized Cost Basis by Origination Year (1)
(In millions)20212020201920182017PriorTotal
DSCR ≥1.6x
LTV less than 55%$$75 $$38 $99 $181 $401 
LTV 55% to 65%381517— 24 99
LTV greater than 65%17 — 8— — — 25
DSCR 1.2x - 1.6x
LTV less than 55%14 14 95 — 42 170
LTV 55% to 65%36 — — 24 10 — 70
LTV greater than 65%— 24 — — — 32
DSCR ≤1.2
LTV less than 55%— — 35 — 30 — 65
LTV 55% to 65%— — 28 — — — 28
LTV greater than 65%21 62 — — 99
Total$95 $160 $249 $79 $152 $254 $989 
(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, 2021, accrued interest receivable on mortgage loans totaled $3 million and is excluded from the amortized cost basis disclosed in the table above and the estimate of expected credit losses.
v3.22.0.1
Fair Value
12 Months Ended
Dec. 31, 2021
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, 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 

December 31, 2020   Total
Assets/Liabilities
at Fair Value
(In millions)Level 1Level 2Level 3
Assets    
Fixed maturity securities:    
Corporate bonds and other$355 $24,109 $770 $25,234 
States, municipalities and political subdivisions— 11,546 46 11,592 
Asset-backed— 7,497 308 7,805 
Total fixed maturity securities 355 43,152 1,124 44,631 
Equity securities:
Common stock175 — 20 195 
Non-redeemable preferred stock68 722 797 
Total equity securities243 722 27 992 
Short term and other1,761 28 — 1,789 
Total assets$2,359 $43,902 $1,151 $47,412 
Liabilities  
Other liabilities$— $19 $— $19 
Total liabilities$— $19 $— $19 
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, 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)

Level 3
(In millions)
Corporate bonds and otherStates, municipalities and political subdivisionsAsset-backedEquity securitiesTotal
Balance as of January 1, 2020$468 $— $165 $18 $651 
Total realized and unrealized investment gains (losses):
Reported in Net investment gains (losses)— (1)(4)(4)
Reported in Net investment income— — (2)— 
Reported in Other comprehensive income (loss)43 16 — 60 
Total realized and unrealized investment gains (losses)44 17 (6)56 
Purchases264 45 154 15 478 
Sales(3)— (9)— (12)
Settlements(13)— (32)— (45)
Transfers into Level 310 — 30 — 40 
Transfers out of Level 3— — (17)— (17)
Balance as of December 31, 2020$770 $46 $308 $27 $1,151 
Unrealized gains (losses) on Level 3 assets and liabilities held as of December 31, 2020 recognized in Net income (loss) in the period$— $— $— $(6)$(6)
Unrealized gains (losses) on Level 3 assets and liabilities held as of December 31, 2020 recognized in Other comprehensive income (loss) in the period43 18 — 62 
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 and commercial paper, 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, 2021 and December 31, 2020, there were $74 million and $71 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.
Derivative Financial Investments
The embedded derivative on funds withheld liability is valued using the change in fair value of the assets supporting the funds withheld liability, which are 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, 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%)
December 31, 2020Estimated Fair Value
(In millions)
Valuation Technique(s)Unobservable Input(s)Range
 (Weighted Average)
Fixed maturity securities$966 Discounted cash flowCredit spread
1% - 8% (3%)
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, 2021Carrying
Amount
Estimated Fair Value
(In millions)Level 1Level 2Level 3Total
Assets
Mortgage loans$973 $— $— $1,018 $1,018 
Liabilities
Long term debt$2,779 $— $2,978 $— $2,978 
December 31, 2020Carrying
Amount
Estimated Fair Value
(In millions)Level 1Level 2Level 3Total
Assets
Mortgage loans$1,068 $— $— $1,151 $1,151 
Liabilities
Long term debt$2,776 $— $3,148 $— $3,148 
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.
v3.22.0.1
Income Taxes
12 Months Ended
Dec. 31, 2021
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, 2021, 2020 and 2019, the Company paid $238 million, $65 million and $239 million to Loews related to federal income taxes.
For 2019 through 2021, Loews and the Company participated in the Internal Revenue Service (IRS) Compliance Assurance Process (CAP), which is a voluntary program for large corporations. Under CAP, the IRS conducted a real-time audit and worked contemporaneously with the Company to resolve any issues prior to the filing of the 2019 tax return. The 2019 examination has been completed. For 2020 and 2021, the Company was selected to participate in the phase of CAP reserved for taxpayers whose risk of noncompliance does not warrant use of IRS resources. The Company believes that participation in CAP should reduce tax-related uncertainties, if any.
As of December 31, 2021 and 2020, there were no unrecognized tax benefits.
The Company recognizes interest accrued related to unrecognized tax benefits and tax refund claims in Income tax (expense) benefit on the Consolidated Statements of Operations. The Company recognizes penalties (if any) in Income tax (expense) benefit on the Consolidated Statements of Operations. During 2021, 2020 and 2019 the Company recognized no interest and no penalties. There were no amounts accrued for interest or penalties as of December 31, 2021 or 2020.
The following table presents a reconciliation between the Company's income tax expense at statutory rates and the recorded income tax expense.
Years ended December 31
(In millions)202120202019
Income tax expense at statutory rates$(312)$(172)$(257)
Tax benefit from tax exempt income51 52 53 
Foreign taxes and credits(3)(1)
State income tax expense(13)(6)(14)
Other tax expense(5)(7)(4)
Income tax expense$(282)$(131)$(223)
As of December 31, 2021, no deferred taxes are required on the undistributed earnings of subsidiaries subject to tax.
The following table presents the current and deferred components of the Company's income tax expense.
Years ended December 31
(In millions)202120202019
Current tax expense$(235)$(180)$(269)
Deferred tax (expense) benefit(47)49 46 
Total income tax expense$(282)$(131)$(223)
Total income tax presented above includes foreign tax expense of approximately $18 million, $16 million and $19 million related to pretax income from foreign operations of approximately $124 million, $45 million and $43 million for the years ended December 31, 2021, 2020 and 2019.
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)20212020
Deferred Tax Assets:
Insurance reserves:
Property and casualty claim and claim adjustment expense reserves$173 $157 
Unearned premium reserves193 174 
Deferred Revenue64 62 
Employee benefits46 122 
Deferred retroactive reinsurance benefit90 83 
Other assets88 92 
Gross deferred tax assets654 690 
Deferred Tax Liabilities:
Investment valuation differences93 28 
Deferred acquisition costs99 93 
Net unrealized gains272 453 
Software and hardware27 31 
Other liabilities21 19 
Gross deferred tax liabilities512 624 
Net deferred tax asset$142 $66 
As of December 31, 2021, the CNA Tax Group had no loss carryforwards and no tax credit carryforward. The foreign operations had loss carryforwards of $138 million, of which $1 million expires in 2035 and $137 million has no expiration. The foreign operations had a tax credit carryforward of $4 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, 2021 or 2020.
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves
12 Months Ended
Dec. 31, 2021
Liability for Claims and Claims Adjustment Expense [Abstract]  
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves Claim, Claim Adjustment Expense 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, 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 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)2021
Net liability for unpaid claim and claim adjustment expenses:
Specialty$5,265 
Commercial8,065 
International1,940 
Life & Group (1)
3,641 
Corporate & Other294 
Total net claim and claim adjustment expenses19,205 
Reinsurance receivables: (2)
Specialty1,168 
Commercial825 
International340 
Life & Group113 
Corporate & Other (3)
2,523 
Total reinsurance receivables4,969 
Total gross liability for unpaid claim and claim adjustment expenses$24,174 
(1) The Life & Group segment amounts are primarily related to long term care claim reserves, 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)202120202019
Reserves, beginning of year:
Gross$22,706 $21,720 $21,984 
Ceded4,005 3,835 4,019 
Net reserves, beginning of year18,701 17,885 17,965 
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 year5,970 5,793 5,356 
Increase (decrease) in provision for insured events of prior years(104)(119)(127)
Amortization of discount174 183 184 
Total net incurred (1)
6,040 5,857 5,413 
Net payments attributable to:
Current year events(1,014)(948)(992)
Prior year events(3,830)(4,216)(4,584)
Total net payments(4,844)(5,164)(5,576)
Foreign currency translation adjustment and other(60)123 83 
Net reserves, end of year19,205 18,701 17,885 
Ceded reserves, end of year4,969 4,005 3,835 
Gross reserves, end of year$24,174 $22,706 $21,720 
(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, 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 
December 31, 2020 Specialty CommercialInternationalLife & GroupCorporate & OtherTotal
(In millions)
Gross Case Reserves$1,567 $3,215 $892 $3,406 $1,614 $10,694 
Gross IBNR Reserves4,181 5,035 1,199 337 1,260 12,012 
Total Gross Carried Claim and Claim Adjustment Expense Reserves$5,748 $8,250 $2,091 $3,743 $2,874 $22,706 
Net Case Reserves$1,410 $2,885 $777 $3,298 $560 $8,930 
Net IBNR Reserves3,488 4,590 1,045 317 331 9,771 
Total Net Carried Claim and Claim Adjustment Expense Reserves$4,898 $7,475 $1,822 $3,615 $891 $18,701 
Net Prior Year Development
Changes in estimates of claim and claim adjustment expense reserves, net of reinsurance, for prior years are defined as net prior year loss reserve development (development). These changes can be favorable or unfavorable. The following table presents development recorded for the Specialty, Commercial, International and Corporate & Other segments.
Years ended December 31
(In millions)202120202019
Pretax (favorable) unfavorable development:
Specialty$(45)$(61)$(92)
Commercial(6)(7)(40)
International(2)21 
Corporate & Other60 50 38 
Total pretax (favorable) unfavorable development$11 $(20)$(73)
Unfavorable development of $60 million and $50 million was recorded within the Corporate & Other segment for the years ended 2021 and 2020 due to higher than expected emergence in mass tort exposures in older accident years primarily related to abuse. Unfavorable development of $38 million was recorded within the Corporate & Other segment for the year ended 2019 primarily due to higher than expected emergence in environmental mass tort exposures in older accident years.
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 2020 and prior is unaudited. Information contained in the tables pertaining to the Company's International segment has been presented at the year-end 2021 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)202120202019
Pretax (favorable) unfavorable development:
Medical Professional Liability$23 $35 $75 
Other Professional Liability and Management Liability24 (15)(69)
Surety(73)(69)(92)
Warranty(14)(7)(15)
Other(5)(5)
Total pretax (favorable) unfavorable development$(45)$(61)$(92)
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.
2019
Unfavorable development in medical professional liability was primarily due to higher than expected severity in accident years 2016 through 2018 in the Company's aging services business, higher than expected severity in accident year 2013 in the Company's allied healthcare business, unfavorable outcomes on individual claims and higher than expected severity in accident year 2017 in the Company's dentists business.
Favorable development in other professional liability and management liability was primarily due to lower than expected claim frequency and favorable outcomes on individual claims in accident years 2017 and prior related to financial institutions, lower than expected large claim losses in recent accident years in the Company's public company directors and officers liability (D&O) business and lower than expected loss adjustment expenses across accident years 2010 through 2018.
Favorable development in surety was due to lower than expected frequency for accident years 2018 and prior.
Favorable development in warranty was due to lower than expected paid loss emergence on vehicle products.
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)2021
Net liability for unpaid claim and claim adjustment expenses:
Medical Professional Liability$1,556 
Other Professional Liability and Management Liability3,159 
Surety406 
Warranty44 
Other100 
Total net liability for unpaid claim and claim adjustment expenses$5,265 
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, 2021
(In millions, except reported claims data)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$464 $469 $508 $498 $493 $484 $493 $499 $497 $497 $17,755 
2013462 479 500 513 525 535 545 531 530 11 19,565 
2014450 489 537 530 535 529 527 524 19,800 
2015433 499 510 494 488 510 501 28 18,170 
2016427 487 485 499 508 510 24 16,085 
2017412 449 458 460 455 41 15,197 
2018404 429 431 448 60 14,997 
2019430 445 458 156 13,804 
2020477 476 347 9,935 
2021377 337 6,761 
Total$4,776 $1,016 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$14 $117 $221 $323 $388 $427 $457 $479 $482 $487 
201317 119 255 355 414 462 495 508 512 
201423 136 258 359 417 472 489 497 
201522 101 230 313 384 420 444 
201618 121 246 339 401 436 
201719 107 235 308 355 
201821 115 211 290 
201917 91 183 
202011 61 
202111 
Total$3,276 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$1,500 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201228 
Liability for unallocated claim adjustment expenses for accident years presented28 
Total net liability for unpaid claim and claim adjustment expenses$1,556 
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021Total
Accident Year
2012$$39 $(10)$(5)$(9)$$$(2)$— $33 
201317 21 13 12 10 10 (14)(1)68 
201439 48 (7)(6)(2)(3)74 
201566 11 (16)(6)22 (9)68 
201660 (2)14 83 
201737 (5)43 
201825 17 44 
201915 13 28 
2020(1)(1)
Total net development for the accident years presented above52 32 13 
Total net development for accident years prior to 201221 
Total unallocated claim adjustment expense development— 
Total$75 $35 $23 
(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, 2021
(In millions, except reported claims data)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$923 $909 $887 $878 $840 $846 $833 $831 $850 $848 $18 18,506 
2013884 894 926 885 866 863 850 846 833 30 17,950 
2014878 898 885 831 835 854 845 841 37 17,577 
2015888 892 877 832 807 813 836 41 17,436 
2016901 900 900 904 907 891 84 17,968 
2017847 845 813 791 775 152 18,159 
2018850 864 869 906 202 19,926 
2019837 845 856 283 19,357 
2020930 944 568 19,095 
20211,037 911 15,487 
Total$8,767 $2,326 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$56 $248 $400 $573 $651 $711 $755 $792 $812 $816 
201354 249 447 618 702 754 771 779 787 
201451 223 392 515 647 707 743 787 
201560 234 404 542 612 677 725 
201664 248 466 625 701 736 
201757 222 394 498 557 
201854 282 473 599 
201964 263 422 
202067 248 
202158 
Total$5,735 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$3,032 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201274 
Liability for unallocated claim adjustment expenses for accident years presented53 
Total net liability for unpaid claim and claim adjustment expenses$3,159 
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021Total
Accident Year
2012$(14)$(22)$(9)$(38)$$(13)$(2)$19 $(2)$(75)
201310 32 (41)(19)(3)(13)(4)(13)(51)
201420 (13)(54)19 (9)(4)(37)
2015(15)(45)(25)23 (52)
2016(1)— (16)(10)
2017(2)(32)(22)(16)(72)
201814 37 56 
201911 19 
202014 14 
Total net development for the accident years presented above(35)34 
Total net development for accident years prior to 2012(20)(21)(12)
Total unallocated claim adjustment expense development(14)— 
Total$(69)$(15)$24 
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
Specialty - Surety
Cumulative Net Incurred Claim and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar YearAs of December 31, 2021
(In millions, except reported claims data)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$120 $122 $98 $70 $52 $45 $39 $38 $37 $36 $5,586 
2013120 121 115 106 91 87 83 82 82 5,088 
2014123 124 94 69 60 45 45 43 5,118 
2015131 131 104 79 63 58 53 5,055 
2016124 124 109 84 67 64 10 5,521 
2017120 115 103 84 71 5,795 
2018114 108 91 62 19 6,097 
2019119 112 98 44 5,816 
2020128 119 104 4,006 
2021137 129 2,592 
Total$765 $328 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$$32 $34 $35 $35 $36 $37 $37 $36 $36 
201316 40 69 78 78 78 77 78 79 
201430 38 36 38 38 39 39 
201526 38 40 42 44 42 
201637 45 45 43 43 
201723 37 41 46 49 
201825 34 39 
201912 34 44 
202020 
2021
Total$396 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$369 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201217 
Liability for unallocated claim adjustment expenses for accident years presented20 
Total net liability for unpaid claim and claim adjustment expenses$406 
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021Total
Accident Year
2012$$(24)$(28)$(18)$(7)$(6)$(1)$(1)$(1)$(84)
2013(6)(9)(15)(4)(4)(1)— (38)
2014(30)(25)(9)(15)— (2)(80)
2015— (27)(25)(16)(5)(5)(78)
2016— (15)(25)(17)(3)(60)
2017(5)(12)(19)(13)(49)
2018(6)(17)(29)(52)
2019(7)(14)(21)
2020(9)(9)
Total net development for the accident years presented above(79)(67)(76)
Total net development for accident years prior to 2012(3)(2)
Total unallocated claim adjustment expense development(10)— — 
Total$(92)$(69)$(73)
(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)202120202019
Pretax (favorable) unfavorable development:
Commercial Auto$53 $33 $(25)
General Liability15 15 16 
Workers' Compensation(82)(96)(13)
Property and Other41 (18)
Total pretax (favorable) unfavorable development$(6)$(7)$(40)
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 business 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.
2019
Favorable development in commercial auto was primarily due to continued lower than expected severity across accident years 2015 and prior and a decline in bodily injury frequency in accident year 2018.
Unfavorable development in general liability was driven by higher than expected large loss emergence in the Company's umbrella business in multiple accident years.
Favorable development in workers’ compensation was due to favorable medical trends driving lower than expected severity in accident years 2012 through 2018.
Favorable development in property and other was primarily driven by lower than expected claim severity related to catastrophe events in accident years 2017 and 2018.
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)2021
Net Claim and claim adjustment expenses:
Commercial Auto$673 
General Liability2,911 
Workers' Compensation3,850 
Property and Other631 
Total net liability for claim and claim adjustment expenses$8,065 
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, 2021
(In millions, except reported claims data)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$275 $289 $299 $303 $307 $299 $299 $297 $296 $295 $46,288 
2013246 265 265 249 245 245 241 241 241 39,430 
2014234 223 212 205 205 201 201 202 33,628 
2015201 199 190 190 183 181 183 30,427 
2016198 186 186 186 190 195 30,449 
2017199 198 200 221 232 30,940 
2018229 227 227 245 34,292 
2019257 266 289 31 37,142 
2020310 303 107 28,837 
2021397 271 27,182 
Total$2,582 $433 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$78 $160 $220 $259 $282 $285 $290 $291 $291 $292 
201374 135 168 200 225 234 238 239 239 
201464 102 137 166 187 196 198 199 
201552 96 130 153 172 175 178 
201652 93 126 154 175 185 
201758 107 150 178 203 
201866 128 175 212 
201977 147 203 
202071 134 
202183 
Total$1,928 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$654 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2012
Liability for unallocated claim adjustment expenses for accident years presented14 
Total net liability for unpaid claim and claim adjustment expenses$673 
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021Total
Accident Year
2012$14 $10 $$$(8)$— $(2)$(1)$(1)$20 
201319 — (16)(4)— (4)— — (5)
2014(11)(11)(7)— (4)— (32)
2015(2)(9)— (7)(2)(18)
2016(12)— — (3)
2017(1)21 11 33 
2018(2)— 18 16 
201923 32 
2020(7)(7)
Total net development for the accident years presented above(17)31 52 
Total net development for accident years prior to 2012(7)
Total unallocated claim adjustment expense development(1)— — 
Total$(25)$33 $53 
(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, 2021
(In millions, except reported claims data)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$587 $611 $639 $636 $619 $635 $635 $630 $632 $632 $20 35,313 
2013650 655 650 655 613 623 620 623 624 24 33,706 
2014653 658 654 631 635 658 659 659 28 28,064 
2015581 576 574 589 600 602 617 42 24,118 
2016623 659 667 671 673 683 68 24,511 
2017632 632 632 634 630 67 22,195 
2018653 644 646 639 205 19,917 
2019680 682 682 330 18,602 
2020723 722 516 13,028 
2021782 706 9,759 
Total$6,670 $2,006 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$28 $132 $247 $374 $454 $510 $559 $579 $597 $602 
201331 128 240 352 450 510 551 572 582 
201431 119 247 376 481 547 569 607 
201519 110 230 357 446 501 530 
201632 163 279 407 481 524 
201723 118 250 399 471 
201833 107 228 307 
201925 98 181 
202023 99 
202126 
Total$3,929 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$2,741 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2012119 
Liability for unallocated claim adjustment expenses for accident years presented51 
Total net liability for unpaid claim and claim adjustment expenses$2,911 
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021Total
Accident Year
2012$24 $28 $(3)$(17)$16 $— $(5)$$— $45 
2013(5)(42)10 (3)(26)
2014(4)(23)23 — 
2015(5)(2)15 11 15 36 
201636 10 60 
2017— — (4)(2)
2018(9)(7)(14)
2019— 
2020(1)(1)
Total net development for the accident years presented above21 16 14 
Total net development for accident years prior to 2012(4)(1)(1)
Total unallocated claim adjustment expense development(1)— 
Total$16 $15 $15 
(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, 2021
(In millions, except reported claims data)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$601 $627 $659 $669 $678 $673 $671 $668 $663 $664 $66 42,804 
2013537 572 592 618 593 582 561 552 548 91 38,867 
2014467 480 479 452 450 446 439 448 105 33,502 
2015422 431 406 408 394 382 372 101 31,894 
2016426 405 396 382 366 355 104 31,981 
2017440 432 421 400 402 92 33,121 
2018450 440 428 415 104 34,851 
2019452 449 437 134 34,248 
2020477 466 228 29,188 
2021468 300 25,711 
Total$4,575 $1,325 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$87 $232 $342 $416 $470 $509 $524 $536 $538 $541 
201380 213 300 370 417 419 411 414 417 
201461 159 215 258 282 290 297 306 
201551 131 180 212 231 243 251 
201653 129 169 198 219 227 
201763 151 207 243 265 
201868 163 229 259 
201971 169 223 
202065 147 
202167 
Total$2,703 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$1,872 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 20121,941 
Other (2)
(14)
Liability for unallocated claim adjustment expenses for accident years presented51 
Total net liability for unpaid claim and claim adjustment expenses$3,850 
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021Total
Accident Year
2012$26 $32 $10 $$(5)$(2)$(3)$(5)$$63 
201335 20 26 (25)(11)(21)(9)(4)11 
201413 (1)(27)(2)(4)(7)(19)
2015(25)(14)(12)(10)(50)
2016(21)(9)(14)(16)(11)(71)
2017(8)(11)(21)(38)
2018(10)(12)(13)(35)
2019(3)(12)(15)
2020(11)(11)
Total net development for the accident years presented above(77)(85)(49)
Adjustment for development on a discounted basis
Total net development for accident years prior to 201238 (13)(35)
Total unallocated claim adjustment expense development23 — — 
Total$(13)$(96)$(82)
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
(2) Other includes the effect of discounting lifetime claim reserves.
International
The following table presents further detail of the development recorded for the International segment.
Years ended December 31
(In millions)202120202019
Pretax (favorable) unfavorable development:
Commercial$(35)(2)$(8)
Specialty36 37 
Other(3)(8)
Total pretax (favorable) unfavorable development $$(2)$21 
(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.
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.
2019
Unfavorable development in specialty was primarily driven by professional indemnity within Europe financial lines in accident years 2017 and 2018 due to potential design and construct exposures.
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)2021
Net Claim and claim adjustment expenses:
International excluding Hardy$1,400 
Hardy540 
Total net liability for claim and claim adjustment expenses$1,940 
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, 2021
(In millions, except reported claims data)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$278 $285 $269 $262 $261 $254 $247 $241 $236 $250 $16 24,998 
2013285 301 293 273 269 260 251 247 251 12 23,967 
2014288 303 303 291 283 300 301 294 16 24,946 
2015301 317 316 298 292 294 297 27 23,357 
2016296 315 300 297 287 302 37 17,776 
2017312 378 401 393 388 84 18,470 
2018384 402 407 406 81 20,726 
2019357 371 368 91 17,974 
2020398 389 184 13,909 
2021426 297 10,401 
Total$3,371 $845 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$46 $117 $151 $172 $188 $200 $210 $213 $215 $218 
201351 116 144 161 176 186 206 218 224 
201454 126 154 173 190 211 245 250 
201558 137 168 189 213 228 239 
201668 136 164 188 200 223 
201767 152 193 223 247 
201894 173 221 252 
201976 171 209 
202062 133 
202158 
Total$2,053 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$1,318 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201247 
Liability for unallocated claim adjustment expenses for accident years presented35 
Total net liability for unpaid claim and claim adjustment expenses$1,400 
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Total (2)
Accident Year
2012$$(16)$(7)$(1)$(7)$(7)$(6)$(5)$14 $(28)
201316 (8)(20)(4)(9)(9)(4)(34)
201415 — (12)(8)17 (7)
201516 (1)(18)(6)(4)
201619 (15)(3)(10)15 
201766 23 (8)(5)76 
201818 (1)22 
201914 (3)11 
2020(9)(9)
(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 2021 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 101 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, 2021
(In millions, except reported claims data)Net Claim and Allocated Claim Adjustment Expense Reserves at Acquisition
Net Incurred Claim and Allocated Claim Adjustment Expenses in 2012(1)(2)
Total Acquired Net Claim and Allocated Claim Adjustment Expense Reserves and 2012 Incurreds
2013(1)(2)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$34 $71 $105 $105 $112 $120 $113 $114 $116 $115 $113 $114 $(3)7,045 
2013132 147 139 140 142 145 146 146 144 7,893 
2014186 184 178 171 172 173 172 169 (6)8,493 
2015191 181 179 180 178 180 181 (1)9,669 
2016231 249 238 226 228 222 (1)10,746 
2017246 256 244 246 253 13,029 
2018275 306 310 316 36 14,868 
2019224 228 223 42 10,891 
2020215 205 87 5,963 
2021181 128 2,244 
Total$2,008 $297 
Cumulative Net Paid Claims and Allocated Claim Adjustment Expenses are presented in the following table.
As of December 31Calendar Year
(In millions)
2012(1)
2013(1)(2)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$14 $80 $100 $109 $107 $109 $110 $111 $112 $115 
201338 102 122 128 132 135 139 140 141 
201456 124 142 152 157 163 165 166 
201530 99 130 146 158 166 164 
201664 146 174 183 196 208 
201753 152 185 207 215 
201855 176 205 236 
201944 104 142 
202028 79 
202113 
Total$1,479 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$529 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2012
Liability for unallocated claim adjustment expenses for accident years presented
Total net liability for unpaid claim and claim adjustment expenses$540 
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2013(1)(2)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Total(3)
Accident Year
2012$— $$$(7)$$$(1)$(2)$$
201315 (8)— (2)12 
2014(2)(6)(7)(1)(3)(17)
2015(10)(2)(2)(10)
201618 (11)(12)(6)(9)
201710 (12)
201831 41 
2019(5)(1)
2020(10)(10)
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
(2) Data presented for this calendar year is post-acquisition of Hardy.
(3) The amounts included in the loss reserve development tables above are presented at the year-end 2021 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 101 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, 2021 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 %18.3 %23.7 %18.2 %12.0 %8.3 %5.1 %2.8 %0.7 %1.0 %
Other Professional Liability and Management Liability6.7 %21.9 %21.1 %16.7 %9.9 %6.4 %4.3 %3.5 %1.7 %0.5 %
Surety(1)
14.1 %48.7 %18.9 %2.6 %1.1 %1.3 %— %0.4 %(0.8)%— %
Commercial
Commercial Auto26.7 %23.2 %18.0 %13.6 %10.1 %3.2 %1.5 %0.4 %— %0.3 %
General Liability4.1 %14.1 %18.0 %19.0 %13.5 %8.7 %5.6 %4.1 %2.2 %0.8 %
Workers' Compensation14.7 %21.7 %13.9 %9.5 %6.4 %2.7 %1.1 %1.5 %0.4 %0.5 %
International
International - Excluding Hardy19.0 %23.7 %10.8 %7.4 %6.1 %5.7 %6.8 %2.6 %1.6 %1.2 %
International - Hardy (2)
20.4 %36.1 %13.4 %6.9 %4.4 %3.9 %1.0 %0.6 %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.
(2) Average historical claims duration for Hardy is presented prospectively beginning with the first full year subsequent to acquisition, 2013.
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)202120202019
Additional amounts ceded under LPT:
Net A&EP adverse development before consideration of LPT$143 $125 $150 
Provision for uncollectible third-party reinsurance on A&EP(5)(25)(25)
Total additional amounts ceded under LPT138 100 125 
Retroactive reinsurance benefit recognized(107)(94)(107)
Pretax impact of deferred retroactive reinsurance$31 $$18 
Net unfavorable prior year development of $143 million, $125 million and $150 million was recognized before consideration of cessions to the LPT for the years ended December 31, 2021, 2020 and 2019. The unfavorable development in 2021, 2020 and 2019 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 2021, 2020 and 2019, the Company released $5 million, $25 million and $25 million of its provision for uncollectible third-party reinsurance.
As of December 31, 2021 and 2020, the cumulative amounts ceded under the LPT were $3.4 billion and $3.3 billion. The unrecognized deferred retroactive reinsurance benefit was $429 million and $398 million as of December 31, 2021 and 2020 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 $3.1 billion as of December 31, 2021. 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, 2021, the cumulative amount ceded under the EWC LPT was $690 million.
Cavello established a collateral trust account as security for its obligations to the Company. The fair value of the collateral trust account was $634 million as of December 31, 2021.
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 completed its annual claim reserve reviews in the third quarter of 2021, 2020 and 2019 resulting in $40 million, $37 million and $56 million pretax reductions in long term care reserves primarily due to lower claim severity than anticipated in the reserve estimates. The Company's 2021 and 2020 annual claim reserve reviews also resulted in $2 million and $46 million pretax increases 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 required.
The GPV for the long term care future policy benefit reserves, performed in the third quarter of 2021, indicated that recorded reserves included a pretax margin of approximately $72 million.
The GPV for the long term care future policy benefit reserves, performed in the third quarter of 2020 and 2019, indicated a premium deficiency primarily driven by lower discount rate assumptions. Recognition of the
premium deficiency resulted in a $74 million and a $216 million pretax increase in policyholders' benefits reflected in the Company's results of operations.
v3.22.0.1
Legal Proceedings, Contingencies and Guarantees
12 Months Ended
Dec. 31, 2021
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.
Data Breach-related Contingency
As previously disclosed, the Company sustained a sophisticated cybersecurity attack in March 2021 involving ransomware. The Company’s investigation revealed that an unauthorized third party copied some personal information relating to certain current and former employees, contractor workers and their dependents and certain other persons, including some policyholders. In July 2021, we provided notifications to the impacted individuals and to regulators, in accordance with applicable law. The Company may be subject to subsequent investigations, fines or penalties, as well as other legal claims and actions, related to the foregoing. The likelihood is reasonably possible, but the amount of such fines, penalties or costs, if any, cannot be estimated at this time.
Based on the information currently known, we do not believe that the March 2021 cybersecurity attack will have a material impact on our business, results of operations or financial condition, but no assurances can be given as we continue to assess the full impact from the incident, including costs, expenses and insurance coverage.
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, 2021, 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.
v3.22.0.1
Reinsurance
12 Months Ended
Dec. 31, 2021
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)20212020
Reinsurance receivables related to insurance reserves:
Ceded claim and claim adjustment expenses$4,969 $4,005 
Ceded future policy benefits288 263 
Reinsurance receivables related to paid losses227 210 
Reinsurance receivables5,484 4,478 
Allowance for uncollectible reinsurance(21)(21)
Reinsurance receivables, net of allowance for uncollectible reinsurance$5,463 $4,457 
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, 2021
A- to A++3,812 
B- to B++987
Insolvent3
Total voluntary reinsurance outstanding balance(1)
$4,802 
(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 $4.0 billion and $3.3 billion as of December 31, 2021 and 2020.
The Company's largest recoverables from a single reinsurer as of December 31, 2021, including ceded unearned premium reserves, were approximately $1.8 billion from subsidiaries of the Berkshire Hathaway Insurance Group, $612 million from Cavello Bay Reinsurance Limited and $425 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 %
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 %
2019 Earned Premiums
Property and casualty$11,021 $288 $4,401 $6,908 4.2 %
Long term care470 50 — 520 9.6 %
Total earned premiums$11,491 $338 $4,401 $7,428 4.6 %
(In millions)DirectAssumedCededNetAssumed/
Net %
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 %
2019 Written Premiums
Property and casualty$11,421 $281 $4,569 $7,133 3.9 %
Long term care473 50 — 523 9.6 %
Total written premiums$11,894 $331 $4,569 $7,656 4.3 %
Included in the direct and ceded earned premiums for the years ended December 31, 2021, 2020 and 2019 are $3,638 million, $3,543 million and $3,578 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.
Long term care premiums are from long-duration contracts; property and casualty premiums are from short-duration contracts.
Insurance claims and policyholders' benefits reported on the Consolidated Statements of Operations are net of estimated reinsurance recoveries of $3,058 million, $3,158 million and $2,733 million for the years ended December 31, 2021, 2020 and 2019, including $2,003 million, $2,375 million and $2,080 million, respectively, related to the significant third-party captive program discussed above.
v3.22.0.1
Debt
12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Debt Debt
Debt is composed of the following long term obligations.
December 31
(In millions)20212020
Senior notes of CNAF:
3.950%, face amount of $550, due May 15, 2024
549 548 
4.500%, face amount of $500, due March 1, 2026
499 499 
3.450%, face amount of $500, due August 15, 2027
497 496 
3.900%, face amount of $500, due May 1, 2029
496 496 
2.050%, face amount of $500, due August 15, 2030
495 495 
Debenture of CNAF, 7.250%, face amount of $243, due November 15, 2023
243 242 
Total$2,779 $2,776 
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, 2021 giving it immediate access to approximately $106 million of additional liquidity. As of December 31, 2021 and 2020, 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, 2021, was $8.7 billion.  As of December 31, 2021 and 2020, 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, 2021 and 2020.
The combined aggregate maturities for debt as of December 31, 2021 are presented in the following table.
(In millions)
2022$— 
2023243 
2024550 
2025— 
2026500 
Thereafter1,500 
Less: discount(14)
Total$2,779 
v3.22.0.1
Benefit Plans
12 Months Ended
Dec. 31, 2021
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 effective 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 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)2021202020212020
Benefit obligation as of January 1$2,769 $2,661 $$
Changes in benefit obligation:
Interest cost62 80 — — 
Participants' contributions— — 
Actuarial (gain) loss(84)205 
Benefits paid(182)(173)(5)(5)
Foreign currency translation and other(2)— — 
Settlements(2)(7)— — 
Benefit obligation as of December 312,561 2,769 
Fair value of plan assets as of January 12,420 2,285 — — 
Change in plan assets:
Actual return on plan assets332 295 — — 
Company contributions10 16 
Participants' contributions— — 
Benefits paid(182)(173)(5)(5)
Foreign currency translation and other(1)— — 
Settlements(2)(7)— — 
Fair value of plan assets as of December 312,577 2,420 — — 
Funded status$16 $(349)$(6)$(7)
Amounts recognized on the Consolidated Balance Sheets as of December 31:
Other assets$77 $$— $— 
Other liabilities(61)(351)(6)(7)
Net amount recognized$16 $(349)$(6)$(7)
Amounts recognized in Accumulated other comprehensive income, not yet recognized in net periodic cost (benefit):
Net actuarial (gain) loss$763 $1,073 $$— 
Net amount recognized$763 $1,073 $$— 
The accumulated benefit obligation for all defined benefit pension plans was $2,561 million and $2,769 million as of December 31, 2021 and 2020. Changes for the year ended December 31, 2021 include actuarial gains of $(84) million driven by investment returns and changes in the discount rate used to determine the defined benefit pension obligations. Changes for the year ended December 31, 2020 include actuarial losses of $205 million primarily driven by changes in the discount rate used to determine defined benefit pension obligations.
For pension plans with a benefit obligation in excess of plan assets, the benefit obligation was $61 million and the aggregate plan assets were $0 at December 31, 2021.
The components of net periodic pension cost (benefit) are presented in the following table.
Years ended December 31
(In millions)202120202019
Net periodic pension cost (benefit)
Interest cost on projected benefit obligation$62 $80 $100 
Expected return on plan assets(154)(155)(142)
Amortization of net actuarial (gain) loss46 45 39 
Settlement loss— 
Total net periodic pension cost (benefit)$(45)$(27)$(3)
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)202120202019
Non-Service Cost (benefit):
Insurance claims and policyholder's benefits$(13)$(8)$(1)
Other operating expenses(32)(19)(2)
Total net periodic pension cost (benefit)$(45)$(27)$(3)
The amounts recognized in Other comprehensive income are presented in the following table.
Years ended December 31
(In millions)202120202019
Pension and postretirement benefits
Amounts arising during the period$262 $(67)$(112)
Settlement— 
Reclassification adjustment relating to prior service credit— — — 
Reclassification adjustment relating to actuarial loss46 45 39 
Total increase (decrease) in Other comprehensive income$309 $(19)$(73)
    
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 3120212020
Pension benefits
Discount rate2.750 %2.350 %
Interest crediting rate3.000 3.000 
Postretirement benefits
Discount rate2.250 %1.600 %
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 31202120202019
Pension benefits
Discount rate2.350 %3.150 %4.250 %
Expected long term rate of return6.750 7.250 7.500 
Interest crediting rate3.000 5.000 5.000 
Postretirement benefits
Discount rate1.600 %2.300 %3.550 %
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 2021, 2020 and 2019.
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 40% to 60% 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, 2021, the Plan had committed approximately $160 million to future capital calls from various third-party limited partnership investments in exchange for an ownership interest in the related partnerships. Derivatives may be used to gain market exposure in an efficient and timely manner. Investment risk is measured and monitored on an ongoing basis through annual liability measurements, periodic asset/liability studies and quarterly investment portfolio reviews.
Pension plan assets measured at fair value on a recurring basis as well as cash are presented in the following tables.
December 31, 2021
(In millions)Level 1Level 2Level 3Total
Assets
Fixed maturity securities:
Corporate bonds and other$— $645 $$653 
States, municipalities and political subdivisions— 30 — 30 
Asset-backed— 110 — 110 
Total fixed maturity securities— 785 793 
Equity securities732 141 — 873 
Short term investments45 — — 45 
Other assets— — 
Cash— — — — 
Total assets measured at fair value$777 $934 $1,719 
Total equity securities measured at net asset value(1)
20 
Total limited partnerships measured at net asset value (1)
838 
Total$2,577 
December 31, 2020
(In millions)Level 1Level 2Level 3Total
Assets
Fixed maturity securities:
Corporate bonds and other$— $643 $$652 
States, municipalities and political subdivisions— 32 — 32 
Asset-backed— 98 — 98 
Total fixed maturity securities— 773 782 
Equity securities666 137 — 803 
Short term investments20 38 — 58 
Other assets— — 
Cash13 — — 13 
Total assets measured at fair value$699 $956 $1,664 
Total limited partnerships measured at net asset value (1)
756 
Total$2,420 
(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 65% and 75% of the carrying value as of December 31, 2021 and 2020 employ hedge fund strategies that generate returns through investing in marketable securities in the public fixed income and equity markets and the remainder were primarily invested in private debt and equity. Within hedge fund strategies, approximately 76% were equity related, 19% pursued a multi-strategy approach and 5% were focused on distressed investments as of December 31, 2021.
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, 2021.
(In millions)Pension BenefitsPostretirement Benefits
2022$182 $
2023179 
2024177 
2025175 — 
2026173 — 
2027-2031798 
In 2022, CNA expects to contribute $5 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 eligible compensation contributed by the employee. In addition, eligible employees also receive a Company contribution of 5% of their 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 $65 million, $70 million and $71 million for the years ended December 31, 2021, 2020 and 2019.
v3.22.0.1
Stock-Based Compensation
12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Stock-Based Compensation Stock-Based Compensation
The current 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 currently provides for awards of stock options, stock appreciation rights (SARs), restricted shares, restricted stock units (RSUs), performance-based RSUs and performance share units. These grants to employees are not designed to be spring-loaded. The number of shares available for the granting of stock-based compensation under the Plan as of December 31, 2021 was approximately 5.6 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 $32 million, $37 million and $34 million for the years ended December 31, 2021, 2020 and 2019. The related income tax benefit recognized was $6 million, $6 million and $8 million for the years ended December 31, 2021, 2020 and 2019. The compensation cost not yet recognized was $41 million, and the weighted average period over which it is expected to be recognized is 1.7 years as of December 31, 2021.
The total fair value of RSUs and performance shares that vested during the years ended December 31, 2021, 2020 and 2019 was $36 million, $35 million and $31 million, respectively.
The weighted average grant date fair value for RSUs and performance shares granted during the years ended December 31, 2021, 2020 and 2019 was $45.82, $34.36 and $43.86, respectively.
The following table presents activity for non-vested RSUs and performance share units under the Plan in 2021.
Number of AwardsWeighted Average Grant Date Fair Value
Balance as of January 1, 20212,439,141 $40.56 
Awards granted1,044,772 45.82 
Awards vested(789,495)46.13 
Awards forfeited, canceled or expired(355,881)40.19 
Performance-based adjustment37,061 43.70 
Balance as of December 31, 20212,375,598 41.21 
v3.22.0.1
Other Intangible Assets
12 Months Ended
Dec. 31, 2021
Intangible Assets, Gross (Excluding Goodwill) [Abstract]  
Other Intangible Assets Other Intangible Assets
Other intangible assets are presented in the following table.
December 3120212020
(In millions)Economic Useful LifeGross Carrying AmountAccumulated AmortizationGross Carrying AmountAccumulated Amortization
Finite-lived intangible assets:
Trade name8 years$$$
Distribution channel15 years11 11 
Total finite-lived intangible assets18 14 18 13 
Indefinite-lived intangible assets:
Syndicate capacity47 48 
Agency force16 16 
Total indefinite-lived intangible assets63 64 
Total other intangible assets$81 $14 $82 $13 
The Company's other intangible assets primarily relate to the purchase of Hardy, and 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, 2021, 2020 and 2019. 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 2022 through 2026.
v3.22.0.1
Leases
12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
Leases Leases
Total lease expense was $57 million, $57 million and $55 million for the years ended December 31, 2021, 2020 and 2019. Total lease expense includes operating lease expense of $38 million, $38 million and $37 million and variable lease expense of $19 million, $19 million and $18 million for the years ended December 31, 2021, 2020 and 2019. Cash paid for amounts included in operating lease liabilities was $44 million, $41 million and $34 million for the years ended December 31, 2021, 2020 and 2019. Operating lease ROU assets obtained in exchange for lease obligations was $11 million, $6 million and $12 million for the years ended December 31, 2021, 2020 and 2019.
The following table presents operating lease ROU assets and lease liabilities.
(In millions)December 31, 2021December 31, 2020
Operating lease ROU assets$175 $199 
Operating lease liabilities248 279 
The following table presents the maturities of operating lease liabilities
(In millions)December 31, 2021
2022$42 
202337 
202430 
202525 
202622 
Thereafter141 
Total lease payments297 
Less: Discount(49)
Total operating lease liabilities$248 
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, 2021December 31, 2020
Weighted average remaining lease term9.8 years10.3 years
Weighted average discount rate3.4 %3.4 %
v3.22.0.1
Stockholders' Equity and Statutory Accounting Practices
12 Months Ended
Dec. 31, 2021
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 significantly 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 $67 million and $91 million at December 31, 2021 and 2020.
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, 2021, CCC is in a positive earned surplus position. The maximum allowable dividend CCC could pay during 2022 that would not be subject to the Department’s prior approval is $1,201 million, less dividends paid during the preceding twelve months measured at that point in time. CCC paid dividends of $880 million in 2021. 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)
2021 (1)
2020
2021 (1)
20202019
Combined Continental Casualty Companies$11,321 $10,708 $1,253 $800 $1,062 
(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 264% and 266% of company action level RBC as of December 31, 2021 and 2020. 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.
v3.22.0.1
Accumulated Other Comprehensive Income (Loss) by Component
12 Months Ended
Dec. 31, 2021
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, 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)$320 
(In millions)Net unrealized gains (losses) on investments with an allowance for credit lossesNet unrealized gains (losses) on other investmentsPension and postretirement benefitsCumulative foreign currency translation adjustmentTotal
Balance as of January 1, 2020$— $1,025 $(833)$(141)$51 
Other comprehensive income (loss) before reclassifications(43)763 (53)47 714 
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $12, $(12), $10, $— and $10
(43)43 (38)— (38)
Other comprehensive income (loss) net of tax (expense) benefit of $—, $(189), $4, $— and $(185)
— 720 (15)47 752 
Balance as of December 31, 2020$— $1,745 $(848)$(94)$803 


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, Net unrealized gains (losses) on investments with OTTI losses and Net unrealized gains (losses) on other investmentsNet investment gains (losses)
Pension and postretirement benefitsOther operating expenses and Insurance claims and policyholders' benefits
v3.22.0.1
Business Segments
12 Months Ended
Dec. 31, 2021
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.
Effective January 1, 2021, and in connection with the ceding of certain legacy reserves under a retroactive reinsurance agreement executed in February 2021, management changed the segment presentation of a legacy portfolio of excess workers’ compensation policies relating to business written in 2007 and prior. This business, which was previously reported as part of the Commercial business segment, is now reported as part of the Corporate & Other business segment. Further information on this retroactive reinsurance agreement is provided in Note E. In addition, a determination was made to change the segment presentation of certain legacy mass tort reserves. Similar to the aforementioned excess workers’ compensation legacy business, these legacy mass tort reserves were previously reported in the Commercial business segment and are now reported as part of the Corporate & Other business segment. These changes were made to better reflect the manner in which the Company is organized for purposes of making operating decisions and assessing performance. Prior period information has been conformed to the new segment presentation.
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%, 9% and 9% of the Company's direct written premiums were derived from outside the United States for the years ended December 31, 2021, 2020 and 2019.
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, 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
InternationalLife &
Group
Corporate
& Other
  
(In millions)EliminationsTotal
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 
December 31, 2020
(In millions)
Reinsurance receivables$886 $848 $302 $390 $2,052 $— $4,478 
Insurance receivables1,052 1,254 328 — 2,640 
Deferred acquisition costs330 281 97 — — — 708 
Goodwill117 — 31 — — — 148 
Deferred non-insurance warranty acquisition expense3,068 — — — — — 3,068 
Insurance reserves 
Claim and claim adjustment expenses5,748 8,250 2,091 3,743 2,874 — 22,706 
Unearned premiums2,635 1,824 546 114 — — 5,119 
Future policy benefits— — — 13,318 — — 13,318 
Deferred non-insurance warranty revenue4,023 — — — — — 4,023 
Year ended December 31, 2019
Specialty

Commercial
Life &
Group
Corporate
& Other
(In millions)InternationalEliminationsTotal
Net written premiums$2,848 $3,315 $971 $523 $$(2)$7,656 
Operating revenues 
Net earned premiums$2,773 $3,162 $974 $520 $$(2)$7,428 
Net investment income556 605 63 820 74 — 2,118 
Non-insurance warranty revenue1,161 — — — — — 1,161 
Other revenues29 — — (5)31 
Total operating revenues4,491 3,796 1,037 1,340 81 (7)10,738 
Claims, benefits and expenses     
Net incurred claims and benefits1,595 2,086 624 1,416 62 — 5,783 
Policyholders’ dividends18 — — — — 23 
Amortization of deferred acquisition costs610 537 236 — — — 1,383 
Non-insurance warranty expense1,082 — — — — — 1,082 
Other insurance related expenses292 505 130 115 (2)(2)1,038 
Other expenses48 32 144 (5)235 
Total claims, benefits and expenses3,632 3,178 998 1,539 204 (7)9,544 
Core income (loss) before income tax859 618 39 (199)(123)— 1,194 
Income tax (expense) benefit on core income (loss)(188)(138)(9)90 30 — (215)
Core income (loss)$671 $480 $30 $(109)$(93)$— 979 
Net investment gains (losses)29 
Income tax (expense) benefit on net investment gains (losses)(8)
Net investment gains (losses), after tax21 
Net income (loss)$1,000 
The following table presents operating revenues by line of business for each reportable segment.
Years ended December 31
(In millions)202120202019
Specialty
Management & Professional Liability$2,776 $2,577 $2,572 
Surety604 596 596 
Warranty & Alternative Risks1,624 1,412 1,323 
Specialty revenues5,004 4,585 4,491 
Commercial
Middle Market1,508 1,444 1,439 
Construction1,322 1,120 1,043 
Small Business558 482 504 
Other Commercial811 815 810 
Commercial revenues4,199 3,861 3,796 
International
Canada344 291 277 
Europe473 389 363 
Hardy297 318 397 
International revenues1,114 998 1,037 
Life & Group revenues1,457 1,355 1,340 
Corporate & Other revenues 21 69 81 
Eliminations(7)(6)(7)
Total operating revenues11,788 10,862 10,738 
Net investment gains (losses)120 (54)29 
Total revenues$11,908 $10,808 $10,767 
v3.22.0.1
Related Party Transactions
12 Months Ended
Dec. 31, 2021
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 $47 million, $47 million and $44 million for the years ended December 31, 2021, 2020 and 2019. Net amounts due to Loews related to these services, included in Other liabilities and payable in the first quarter of the subsequent year, were $23 million and $22 million as of December 31, 2021 and 2020. In addition, the Company reimbursed Loews for general corporate services and related travel expenses of $1 million and less than $1 million for the years ended December 31, 2021 and 2020. The CNA Tax Group is included in the consolidated federal income tax return of Loews and its eligible subsidiaries. The related payable due to Loews, included in Other liabilities, was $33 million and $67 million as of December 31, 2021 and 2020. 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. 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, 2021, 2020 and 2019 were $2 million.
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Non-Insurance Revenues from Contracts with Customers
12 Months Ended
Dec. 31, 2021
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 $4.5 billion and $4.0 billion reported in Deferred non-insurance warranty revenue as of December 31, 2021 and 2020. The increase in the deferred revenue balance for the year ended December 31, 2021 was primarily driven by deferrals outpacing revenue recognized in the period due to growth in the business. 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 year ended December 31, 2020, the Company recognized $1.1 billion of revenues that were included in the deferred revenue balance as of January 1, 2020. For the years ended December 31, 2021 and 2020, 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 $1.3 billion of the deferred revenue in 2022, $1.0 billion in 2023, $0.8 billion in 2024 and $1.3 billion thereafter.
Cost to Obtain and Fulfill Non-Insurance Warranty Contracts with Customers
For the years ended December 31, 2021 and 2020, capitalized commission costs were $3.5 billion and $3.1 billion and capitalized administrator service costs were $47 million and $37 million. For the years ended December 31, 2021 and 2020, the amount of amortization of capitalized costs was $1.1 billion and $0.9 billion and there were no impairment losses related to the costs capitalized. There were no adjustments to deferred costs recorded for the years ended December 31, 2021 and 2020.
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Schedule I. Summary of Investments - Other Than Investments in Related Parties
12 Months Ended
Dec. 31, 2021
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract]  
Schedule I. Summary of Investments - Other than Investments in Related Parties
SCHEDULE I. SUMMARY OF INVESTMENTS - OTHER THAN INVESTMENTS IN RELATED PARTIES
Incorporated herein by reference to Note B to the Consolidated Financial Statements included under Item 8.
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Schedule II. Condensed Financial Information of Registrant (Parent Company)
12 Months Ended
Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]  
Schedule II. Condensed Financial Information of Registrant (Parent Company)
SCHEDULE II. CONDENSED FINANCIAL INFORMATION OF REGISTRANT (PARENT COMPANY)
CNA Financial Corporation
Statements of Operations and Comprehensive Income
Years ended December 31
(In millions)202120202019
Revenues
Net investment income$— $$13 
Net investment losses— (20)(21)
Total revenues— (17)(8)
Expenses
Administrative and general
Interest112 122 131 
Total expenses113 123 132 
Loss from operations before income taxes and equity in net income of subsidiaries(113)(140)(140)
Income tax benefit11 18 21 
Loss before equity in net income of subsidiaries(102)(122)(119)
Equity in net income of subsidiaries1,304 812 1,119 
Net income1,202 690 1,000 
Equity in other comprehensive (loss) income of subsidiaries(483)752 929 
Total comprehensive income$719 $1,442 $1,929 
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)20212020
Assets
Investment in subsidiaries$14,937 $14,996 
Cash— 
Short term investments685 522 
Amounts due from affiliates
Other assets— 
Total assets$15,626 $15,523 
Liabilities
Long term debt$2,779 $2,776 
Other liabilities38 40 
Total liabilities2,817 2,816 
Stockholders' Equity
Common stock ($2.50 par value; 500,000,000 shares authorized; 273,040,243 shares issued; 271,363,999 and 271,391,603 shares outstanding)
683 683 
Additional paid-in capital2,215 2,211 
Retained earnings9,663 9,081 
Accumulated other comprehensive income320 803 
Treasury stock (1,676,244 and 1,648,640 shares), at cost
(72)(71)
Total stockholders' equity12,809 12,707 
Total liabilities and stockholders' equity$15,626 $15,523 
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)202120202019
Cash Flows from Operating Activities
Net income$1,202 $690 $1,000 
Adjustments to reconcile net income to net cash flows provided by operating activities:
Equity in net income of subsidiaries(1,304)(812)(1,119)
Dividends received from subsidiaries880 975 1,065 
Net investment income— 20 21 
Other, net33 26 13 
Net cash flows provided by operating activities811 899 980 
Cash Flows from Investing Activities
Change in short term investments(163)10 
Capital contributions to subsidiaries— (1)(2)
Other, net— — — 
Net cash flows (used) provided by investing activities(163)
Cash Flows from Financing Activities
Dividends paid to common stockholders(621)(950)(929)
Proceeds from the issuance of debt— 495 496 
Repayment of debt— (419)(520)
Purchase of treasury stock(18)(18)(23)
Other, net(8)(9)(12)
Net cash flows used by financing activities(647)(901)(988)
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 89.6% of the outstanding common stock of CNAF as of December 31, 2021.
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Schedule III. Supplementary Insurance Information
12 Months Ended
Dec. 31, 2021
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.
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Schedule IV. Reinsurance
12 Months Ended
Dec. 31, 2021
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.
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Schedule V. Valuation and Qualifying Accounts
12 Months Ended
Dec. 31, 2021
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, 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 
Year ended December 31, 2019
Allowance for uncollectible:
Insurance and reinsurance receivables$71 $(6)$— $(8)$57 
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.
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Schedule VI. Supplemental Information Concerning Property and Casualty Insurance Operations
12 Months Ended
Dec. 31, 2021
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)202120202019
Balance Sheet Data
Deferred acquisition costs$737 $708 
Reserves for unpaid claim and claim adjustment expenses24,174 22,706 
Discount deducted from claim and claim adjustment expense reserves above (based on interest rates ranging from 3.5% to 6.4%)
1,146 1,209 
Unearned premiums5,761 5,119 
Statement of Operations Data
Net written premiums$8,405 $8,059 $7,656 
Net earned premiums8,175 7,649 7,428 
Net investment income2,111 1,896 2,063 
Incurred claim and claim adjustment expenses related to current year5,970 5,793 5,356 
Incurred claim and claim adjustment expenses related to prior years(104)(119)(127)
Amortization of deferred acquisition costs1,443 1,410 1,383 
Paid claim and claim adjustment expenses4,844 5,164 5,576 
v3.22.0.1
Summary of Significant Accounting Policies (Policies)
12 Months Ended
Dec. 31, 2021
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 89.6% of the outstanding common stock of CNAF as of December 31, 2021.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.
Recently Adopted Accounting Standards Updates and Accounting Standards Pending Adoption
ASU 2016-13: In June 2016 the Financial Accounting Standards Board (FASB) issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The updated accounting guidance required changes to the recognition of credit losses on financial instruments not accounted for at fair value through the Company’s results of operations. For financial assets measured at cost, the expected credit loss model requires immediate recognition of estimated credit losses over the life of the asset and presentation of the asset at the net amount expected to be collected. This updated guidance applies to mortgage loan investments, reinsurance and insurance receivables and other financing receivables. For available-for-sale fixed maturity securities carried at fair value, estimated credit losses will continue to be measured at the present value of expected cash flows, however, the other than temporary impairment (OTTI) concept has been eliminated. Under the previous guidance, estimated credit impairments resulted in a write-down of amortized cost. Under the updated guidance, estimated credit losses are recognized through an allowance and reversals of the allowance are permitted if the estimate of credit losses declines. For available-for-sale fixed maturity securities where the Company has an intent to sell, impairment will continue to result in a write-down of amortized cost.
On January 1, 2020, the Company adopted the updated guidance using a modified retrospective method with a cumulative effect adjustment recorded to beginning Retained earnings. Prior period amounts have not been adjusted and continue to be reported in accordance with the previous accounting guidance. A prospective transition approach is required for available-for-sale fixed maturity securities that were purchased with credit deterioration (PCD assets) or have recognized an OTTI write-down prior to the effective date. The cumulative effect of the accounting change resulted in a $5 million decrease in Retained earnings, with a corresponding $7 million allowance for credit losses recorded for Mortgage loans partially offset by a $2 million tax impact.
The allowance for uncollectible reinsurance and insurance receivables was unchanged as a result of adopting the updated guidance. At adoption, an allowance for credit losses of $6 million was established for available-for-sale fixed maturity securities that were PCD assets, with a corresponding increase to amortized cost, resulting in no adjustment to the carrying value of the securities.
See the accounting policy discussion within this Note, as well as Notes B and G to the Consolidated Financial Statements for additional information regarding credit losses.
Accounting Standards 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. Entities will be required to update 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. Restatement of prior periods presented is required.
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 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 material decrease in Accumulated other comprehensive income as of the transition date. The requirement to update cash flow assumptions at least annually is expected to change the pattern of earnings emergence 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, related cash flows, or the underlying economics of the business.
The Company continues to make progress in connection with these matters and is in process of refining key accounting policy decisions, technology solutions and updates to internal controls associated with adoption of the new guidance. These in-progress activities include modifications of actuarial valuation systems, data sourcing, analytical procedures and reporting processes.
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, 2021 gross premium valuation (GPV) indicated that recorded reserves included a margin of approximately $72 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 1% of total net written premiums for each of the years ended December 31, 2021, 2020 and 2019. 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 structured settlements not funded by annuities were realized, or that unrealized gains on fixed maturity securities supporting long term care products 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 through Other comprehensive income (Shadow Adjustments). Shadow Adjustments, net of tax, decreased $296 million and increased $575 million for the years ended December 31, 2021 and 2020, respectively. As of December 31, 2021 and 2020, net unrealized gains on investments included in Accumulated other comprehensive income (AOCI) were correspondingly reduced by Shadow Adjustments of $2,477 million and $2,773 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. Prior to 2020, mortgage loans were evaluated on an individual loan basis considering the collection experience of each loan and other credit quality indicators such as DSCR and the credit-worthiness of the borrower or tenants of credit tenant loan properties. Mortgage loans were considered to be impaired loans and a loss incurred when it was probable that contractual principal and interest payments would not be collected and any impairment losses were recognized as a direct write-down of amortized cost. 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.
Prior to 2020, the Company’s assessment of whether an impairment loss occurred also incorporated both quantitative and qualitative information. Fixed maturity securities in an unrealized loss position that the Company intended to sell, or it more likely than not would be required to sell before recovery of amortized cost, were considered to be impaired and the entire difference between the amortized cost basis and fair value of the security was recognized as an impairment loss in earnings as a direct write-down of amortized cost. The remaining fixed maturity securities in an unrealized loss position were evaluated to determine if a credit loss existed. If a credit loss was determined to exist, the credit loss was recognized in earnings as a direct write-down of amortized cost.
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.Prior to 2020, the allowance for uncollectible reinsurance and insurance receivables was measured using an incurred loss methodology.
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, 2021, 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.
v3.22.0.1
Investments (Tables)
12 Months Ended
Dec. 31, 2021
Investments [Abstract]  
Net investment income
The significant components of Net investment income are presented in the following table.
Years ended December 31
(In millions)202120202019
Fixed maturity securities$1,707 $1,728 $1,817 
Equity securities83 65 85 
Limited partnership investments362 121 180 
Mortgage loans61 57 51 
Short term investments34 
Trading portfolio18 
Other— 
Gross investment income2,223 1,999 2,181 
Investment expense(64)(64)(63)
Net investment income$2,159 $1,935 $2,118 
Net realized investment gains (losses)
Net investment gains (losses) are presented in the following table.
Years ended December 31
(In millions)202120202019
Net investment gains (losses):
Fixed maturity securities:
Gross gains$186 $220 $125 
Gross losses(90)(220)(131)
Net investment gains (losses) on fixed maturity securities96 — (6)
Equity securities(3)66 
Derivatives(10)(11)
Mortgage loans10 (21)— 
Short term investments and other(20)(20)
Net investment gains (losses)$120 $(54)$29 
Debt securities, available-for-sale, allowance for credit loss Accrued interest receivable on available-for-sale fixed maturity securities totaled $369 million and $371 million as of December 31, 2021 and 2020 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, 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 
Intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost basis— — — 
Write-offs charged against the allowance16 — 16 
Recoveries of amounts previously written off— — — 
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 
(In millions)Corporate and other bondsAsset-backedTotal
Allowance for credit losses:
Balance as of January 1, 2020$— $— $— 
Additions to the allowance for credit losses:
Impact of adopting ASC 326— 
Securities for which credit losses were not previously recorded67 12 79 
Available-for-sale securities accounted for as PCD assets— 
Reductions to the allowance for credit losses:
Securities sold during the period (realized)22 — 22 
Intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost basis— 
Write-offs charged against the allowance— — — 
Recoveries of amounts previously written off— — — 
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period(32)(27)
Balance as of December 31, 2020
$23 $17 $40 
Components of net other than temporary impairment losses recognized in earnings by asset type The table includes losses 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)202120202019
Fixed maturity securities available-for-sale:
Corporate and other bonds$11 $87 $33 
Asset-backed20 24 11 
Impairment (gains) losses recognized in earnings$31 $111 $44 
Summary of fixed maturity securities
The following tables present a summary of fixed maturity securities.
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 
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 
December 31, 2020Cost 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$20,792 $3,578 $22 $23 $24,325 
States, municipalities and political subdivisions9,729 1,863 — — 11,592 
Asset-backed:
Residential mortgage-backed3,442 146 — 3,587 
Commercial mortgage-backed1,933 93 42 17 1,967 
Other asset-backed2,179 81 — 2,251 
Total asset-backed7,554 320 52 17 7,805 
U.S. Treasury and obligations of government-sponsored enterprises339 — 338 
Foreign government512 32 — — 544 
Total fixed maturity securities available-for-sale38,926 5,795 77 40 44,604 
Total fixed maturity securities trading27 — — — 27 
Total fixed maturity securities$38,953 $5,795 $77 $40 $44,631 
Securities in a gross unrealized loss position
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, 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 
Less than 12 Months12 Months or LongerTotal
December 31, 2020Estimated
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$609 $21 $12 $$621 $22 
States, municipalities and political subdivisions33 — — — 33 — 
Asset-backed:
Residential mortgage-backed71 11 — 82 
Commercial mortgage-backed533 40 28 561 42 
Other asset-backed344 13 — 357 
Total asset-backed948 50 52 1,000 52 
U.S. Treasury and obligations of government-sponsored enterprises63 — — 63 
   Foreign government13 — — — 13 — 
Total$1,666 $74 $64 $$1,730 $77 
Contractual maturity
The following table presents available-for-sale fixed maturity securities by contractual maturity.
December 3120212020
(In millions)Cost or
Amortized
Cost
Estimated
Fair
Value
Cost or
Amortized
Cost
Estimated
Fair
Value
Due in one year or less$1,603 $1,624 $1,456 $1,458 
Due after one year through five years10,637 11,229 12,304 13,098 
Due after five years through ten years13,294 14,338 12,319 13,878 
Due after ten years14,411 17,182 12,847 16,170 
Total$39,945 $44,373 $38,926 $44,604 
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, 2021
Mortgage Loans Amortized Cost Basis by Origination Year (1)
(In millions)20212020201920182017PriorTotal
DSCR ≥1.6x
LTV less than 55%$$75 $$38 $99 $181 $401 
LTV 55% to 65%381517— 24 99
LTV greater than 65%17 — 8— — — 25
DSCR 1.2x - 1.6x
LTV less than 55%14 14 95 — 42 170
LTV 55% to 65%36 — — 24 10 — 70
LTV greater than 65%— 24 — — — 32
DSCR ≤1.2
LTV less than 55%— — 35 — 30 — 65
LTV 55% to 65%— — 28 — — — 28
LTV greater than 65%21 62 — — 99
Total$95 $160 $249 $79 $152 $254 $989 
(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.
v3.22.0.1
Fair Value (Tables)
12 Months Ended
Dec. 31, 2021
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, 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 

December 31, 2020   Total
Assets/Liabilities
at Fair Value
(In millions)Level 1Level 2Level 3
Assets    
Fixed maturity securities:    
Corporate bonds and other$355 $24,109 $770 $25,234 
States, municipalities and political subdivisions— 11,546 46 11,592 
Asset-backed— 7,497 308 7,805 
Total fixed maturity securities 355 43,152 1,124 44,631 
Equity securities:
Common stock175 — 20 195 
Non-redeemable preferred stock68 722 797 
Total equity securities243 722 27 992 
Short term and other1,761 28 — 1,789 
Total assets$2,359 $43,902 $1,151 $47,412 
Liabilities  
Other liabilities$— $19 $— $19 
Total liabilities$— $19 $— $19 
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, 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)

Level 3
(In millions)
Corporate bonds and otherStates, municipalities and political subdivisionsAsset-backedEquity securitiesTotal
Balance as of January 1, 2020$468 $— $165 $18 $651 
Total realized and unrealized investment gains (losses):
Reported in Net investment gains (losses)— (1)(4)(4)
Reported in Net investment income— — (2)— 
Reported in Other comprehensive income (loss)43 16 — 60 
Total realized and unrealized investment gains (losses)44 17 (6)56 
Purchases264 45 154 15 478 
Sales(3)— (9)— (12)
Settlements(13)— (32)— (45)
Transfers into Level 310 — 30 — 40 
Transfers out of Level 3— — (17)— (17)
Balance as of December 31, 2020$770 $46 $308 $27 $1,151 
Unrealized gains (losses) on Level 3 assets and liabilities held as of December 31, 2020 recognized in Net income (loss) in the period$— $— $— $(6)$(6)
Unrealized gains (losses) on Level 3 assets and liabilities held as of December 31, 2020 recognized in Other comprehensive income (loss) in the period43 18 — 62 
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, 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%)
December 31, 2020Estimated Fair Value
(In millions)
Valuation Technique(s)Unobservable Input(s)Range
 (Weighted Average)
Fixed maturity securities$966 Discounted cash flowCredit spread
1% - 8% (3%)
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, 2021Carrying
Amount
Estimated Fair Value
(In millions)Level 1Level 2Level 3Total
Assets
Mortgage loans$973 $— $— $1,018 $1,018 
Liabilities
Long term debt$2,779 $— $2,978 $— $2,978 
December 31, 2020Carrying
Amount
Estimated Fair Value
(In millions)Level 1Level 2Level 3Total
Assets
Mortgage loans$1,068 $— $— $1,151 $1,151 
Liabilities
Long term debt$2,776 $— $3,148 $— $3,148 
v3.22.0.1
Income Taxes (Tables)
12 Months Ended
Dec. 31, 2021
Income Tax Disclosure [Abstract]  
Reconciliation between the Company's federal income tax (expense) benefit at statutory rates and the recorded income tax (expense) benefit
The following table presents a reconciliation between the Company's income tax expense at statutory rates and the recorded income tax expense.
Years ended December 31
(In millions)202120202019
Income tax expense at statutory rates$(312)$(172)$(257)
Tax benefit from tax exempt income51 52 53 
Foreign taxes and credits(3)(1)
State income tax expense(13)(6)(14)
Other tax expense(5)(7)(4)
Income tax expense$(282)$(131)$(223)
Current and deferred components of the Company's income tax (expense) benefit
The following table presents the current and deferred components of the Company's income tax expense.
Years ended December 31
(In millions)202120202019
Current tax expense$(235)$(180)$(269)
Deferred tax (expense) benefit(47)49 46 
Total income tax expense$(282)$(131)$(223)
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)20212020
Deferred Tax Assets:
Insurance reserves:
Property and casualty claim and claim adjustment expense reserves$173 $157 
Unearned premium reserves193 174 
Deferred Revenue64 62 
Employee benefits46 122 
Deferred retroactive reinsurance benefit90 83 
Other assets88 92 
Gross deferred tax assets654 690 
Deferred Tax Liabilities:
Investment valuation differences93 28 
Deferred acquisition costs99 93 
Net unrealized gains272 453 
Software and hardware27 31 
Other liabilities21 19 
Gross deferred tax liabilities512 624 
Net deferred tax asset$142 $66 
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Tables)
12 Months Ended
Dec. 31, 2021
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)2021
Net liability for unpaid claim and claim adjustment expenses:
Specialty$5,265 
Commercial8,065 
International1,940 
Life & Group (1)
3,641 
Corporate & Other294 
Total net claim and claim adjustment expenses19,205 
Reinsurance receivables: (2)
Specialty1,168 
Commercial825 
International340 
Life & Group113 
Corporate & Other (3)
2,523 
Total reinsurance receivables4,969 
Total gross liability for unpaid claim and claim adjustment expenses$24,174 
(1) The Life & Group segment amounts are primarily related to long term care claim reserves, 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)202120202019
Reserves, beginning of year:
Gross$22,706 $21,720 $21,984 
Ceded4,005 3,835 4,019 
Net reserves, beginning of year18,701 17,885 17,965 
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 year5,970 5,793 5,356 
Increase (decrease) in provision for insured events of prior years(104)(119)(127)
Amortization of discount174 183 184 
Total net incurred (1)
6,040 5,857 5,413 
Net payments attributable to:
Current year events(1,014)(948)(992)
Prior year events(3,830)(4,216)(4,584)
Total net payments(4,844)(5,164)(5,576)
Foreign currency translation adjustment and other(60)123 83 
Net reserves, end of year19,205 18,701 17,885 
Ceded reserves, end of year4,969 4,005 3,835 
Gross reserves, end of year$24,174 $22,706 $21,720 
(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, 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 
December 31, 2020 Specialty CommercialInternationalLife & GroupCorporate & OtherTotal
(In millions)
Gross Case Reserves$1,567 $3,215 $892 $3,406 $1,614 $10,694 
Gross IBNR Reserves4,181 5,035 1,199 337 1,260 12,012 
Total Gross Carried Claim and Claim Adjustment Expense Reserves$5,748 $8,250 $2,091 $3,743 $2,874 $22,706 
Net Case Reserves$1,410 $2,885 $777 $3,298 $560 $8,930 
Net IBNR Reserves3,488 4,590 1,045 317 331 9,771 
Total Net Carried Claim and Claim Adjustment Expense Reserves$4,898 $7,475 $1,822 $3,615 $891 $18,701 
Net prior year development The following table presents development recorded for the Specialty, Commercial, International and Corporate & Other segments.
Years ended December 31
(In millions)202120202019
Pretax (favorable) unfavorable development:
Specialty$(45)$(61)$(92)
Commercial(6)(7)(40)
International(2)21 
Corporate & Other60 50 38 
Total pretax (favorable) unfavorable development$11 $(20)$(73)
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)202120202019
Additional amounts ceded under LPT:
Net A&EP adverse development before consideration of LPT$143 $125 $150 
Provision for uncollectible third-party reinsurance on A&EP(5)(25)(25)
Total additional amounts ceded under LPT138 100 125 
Retroactive reinsurance benefit recognized(107)(94)(107)
Pretax impact of deferred retroactive reinsurance$31 $$18 
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)2021
Net liability for unpaid claim and claim adjustment expenses:
Medical Professional Liability$1,556 
Other Professional Liability and Management Liability3,159 
Surety406 
Warranty44 
Other100 
Total net liability for unpaid claim and claim adjustment expenses$5,265 
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)202120202019
Pretax (favorable) unfavorable development:
Medical Professional Liability$23 $35 $75 
Other Professional Liability and Management Liability24 (15)(69)
Surety(73)(69)(92)
Warranty(14)(7)(15)
Other(5)(5)
Total pretax (favorable) unfavorable development$(45)$(61)$(92)
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)2021
Net Claim and claim adjustment expenses:
Commercial Auto$673 
General Liability2,911 
Workers' Compensation3,850 
Property and Other631 
Total net liability for claim and claim adjustment expenses$8,065 
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)202120202019
Pretax (favorable) unfavorable development:
Commercial Auto$53 $33 $(25)
General Liability15 15 16 
Workers' Compensation(82)(96)(13)
Property and Other41 (18)
Total pretax (favorable) unfavorable development$(6)$(7)$(40)
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)2021
Net Claim and claim adjustment expenses:
International excluding Hardy$1,400 
Hardy540 
Total net liability for claim and claim adjustment expenses$1,940 
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)202120202019
Pretax (favorable) unfavorable development:
Commercial$(35)(2)$(8)
Specialty36 37 
Other(3)(8)
Total pretax (favorable) unfavorable development $$(2)$21 
(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, 2021 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 %18.3 %23.7 %18.2 %12.0 %8.3 %5.1 %2.8 %0.7 %1.0 %
Other Professional Liability and Management Liability6.7 %21.9 %21.1 %16.7 %9.9 %6.4 %4.3 %3.5 %1.7 %0.5 %
Surety(1)
14.1 %48.7 %18.9 %2.6 %1.1 %1.3 %— %0.4 %(0.8)%— %
Commercial
Commercial Auto26.7 %23.2 %18.0 %13.6 %10.1 %3.2 %1.5 %0.4 %— %0.3 %
General Liability4.1 %14.1 %18.0 %19.0 %13.5 %8.7 %5.6 %4.1 %2.2 %0.8 %
Workers' Compensation14.7 %21.7 %13.9 %9.5 %6.4 %2.7 %1.1 %1.5 %0.4 %0.5 %
International
International - Excluding Hardy19.0 %23.7 %10.8 %7.4 %6.1 %5.7 %6.8 %2.6 %1.6 %1.2 %
International - Hardy (2)
20.4 %36.1 %13.4 %6.9 %4.4 %3.9 %1.0 %0.6 %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.
(2) Average historical claims duration for Hardy is presented prospectively beginning with the first full year subsequent to acquisition, 2013.
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, 2021
(In millions, except reported claims data)Net Claim and Allocated Claim Adjustment Expense Reserves at Acquisition
Net Incurred Claim and Allocated Claim Adjustment Expenses in 2012(1)(2)
Total Acquired Net Claim and Allocated Claim Adjustment Expense Reserves and 2012 Incurreds
2013(1)(2)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$34 $71 $105 $105 $112 $120 $113 $114 $116 $115 $113 $114 $(3)7,045 
2013132 147 139 140 142 145 146 146 144 7,893 
2014186 184 178 171 172 173 172 169 (6)8,493 
2015191 181 179 180 178 180 181 (1)9,669 
2016231 249 238 226 228 222 (1)10,746 
2017246 256 244 246 253 13,029 
2018275 306 310 316 36 14,868 
2019224 228 223 42 10,891 
2020215 205 87 5,963 
2021181 128 2,244 
Total$2,008 $297 
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)
2012(1)
2013(1)(2)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$14 $80 $100 $109 $107 $109 $110 $111 $112 $115 
201338 102 122 128 132 135 139 140 141 
201456 124 142 152 157 163 165 166 
201530 99 130 146 158 166 164 
201664 146 174 183 196 208 
201753 152 185 207 215 
201855 176 205 236 
201944 104 142 
202028 79 
202113 
Total$1,479 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$529 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2012
Liability for unallocated claim adjustment expenses for accident years presented
Total net liability for unpaid claim and claim adjustment expenses$540 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2013(1)(2)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Total(3)
Accident Year
2012$— $$$(7)$$$(1)$(2)$$
201315 (8)— (2)12 
2014(2)(6)(7)(1)(3)(17)
2015(10)(2)(2)(10)
201618 (11)(12)(6)(9)
201710 (12)
201831 41 
2019(5)(1)
2020(10)(10)
(1) Data presented for these calendar years is required supplemental information, which is unaudited.
(2) Data presented for this calendar year is post-acquisition of Hardy.
(3) The amounts included in the loss reserve development tables above are presented at the year-end 2021 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 101 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, 2021
(In millions, except reported claims data)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$464 $469 $508 $498 $493 $484 $493 $499 $497 $497 $17,755 
2013462 479 500 513 525 535 545 531 530 11 19,565 
2014450 489 537 530 535 529 527 524 19,800 
2015433 499 510 494 488 510 501 28 18,170 
2016427 487 485 499 508 510 24 16,085 
2017412 449 458 460 455 41 15,197 
2018404 429 431 448 60 14,997 
2019430 445 458 156 13,804 
2020477 476 347 9,935 
2021377 337 6,761 
Total$4,776 $1,016 
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)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$14 $117 $221 $323 $388 $427 $457 $479 $482 $487 
201317 119 255 355 414 462 495 508 512 
201423 136 258 359 417 472 489 497 
201522 101 230 313 384 420 444 
201618 121 246 339 401 436 
201719 107 235 308 355 
201821 115 211 290 
201917 91 183 
202011 61 
202111 
Total$3,276 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$1,500 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201228 
Liability for unallocated claim adjustment expenses for accident years presented28 
Total net liability for unpaid claim and claim adjustment expenses$1,556 
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)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021Total
Accident Year
2012$$39 $(10)$(5)$(9)$$$(2)$— $33 
201317 21 13 12 10 10 (14)(1)68 
201439 48 (7)(6)(2)(3)74 
201566 11 (16)(6)22 (9)68 
201660 (2)14 83 
201737 (5)43 
201825 17 44 
201915 13 28 
2020(1)(1)
Total net development for the accident years presented above52 32 13 
Total net development for accident years prior to 201221 
Total unallocated claim adjustment expense development— 
Total$75 $35 $23 
(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, 2021
(In millions, except reported claims data)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$923 $909 $887 $878 $840 $846 $833 $831 $850 $848 $18 18,506 
2013884 894 926 885 866 863 850 846 833 30 17,950 
2014878 898 885 831 835 854 845 841 37 17,577 
2015888 892 877 832 807 813 836 41 17,436 
2016901 900 900 904 907 891 84 17,968 
2017847 845 813 791 775 152 18,159 
2018850 864 869 906 202 19,926 
2019837 845 856 283 19,357 
2020930 944 568 19,095 
20211,037 911 15,487 
Total$8,767 $2,326 
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)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$56 $248 $400 $573 $651 $711 $755 $792 $812 $816 
201354 249 447 618 702 754 771 779 787 
201451 223 392 515 647 707 743 787 
201560 234 404 542 612 677 725 
201664 248 466 625 701 736 
201757 222 394 498 557 
201854 282 473 599 
201964 263 422 
202067 248 
202158 
Total$5,735 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$3,032 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201274 
Liability for unallocated claim adjustment expenses for accident years presented53 
Total net liability for unpaid claim and claim adjustment expenses$3,159 
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)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021Total
Accident Year
2012$(14)$(22)$(9)$(38)$$(13)$(2)$19 $(2)$(75)
201310 32 (41)(19)(3)(13)(4)(13)(51)
201420 (13)(54)19 (9)(4)(37)
2015(15)(45)(25)23 (52)
2016(1)— (16)(10)
2017(2)(32)(22)(16)(72)
201814 37 56 
201911 19 
202014 14 
Total net development for the accident years presented above(35)34 
Total net development for accident years prior to 2012(20)(21)(12)
Total unallocated claim adjustment expense development(14)— 
Total$(69)$(15)$24 
(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, 2021
(In millions, except reported claims data)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$120 $122 $98 $70 $52 $45 $39 $38 $37 $36 $5,586 
2013120 121 115 106 91 87 83 82 82 5,088 
2014123 124 94 69 60 45 45 43 5,118 
2015131 131 104 79 63 58 53 5,055 
2016124 124 109 84 67 64 10 5,521 
2017120 115 103 84 71 5,795 
2018114 108 91 62 19 6,097 
2019119 112 98 44 5,816 
2020128 119 104 4,006 
2021137 129 2,592 
Total$765 $328 
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)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$$32 $34 $35 $35 $36 $37 $37 $36 $36 
201316 40 69 78 78 78 77 78 79 
201430 38 36 38 38 39 39 
201526 38 40 42 44 42 
201637 45 45 43 43 
201723 37 41 46 49 
201825 34 39 
201912 34 44 
202020 
2021
Total$396 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$369 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201217 
Liability for unallocated claim adjustment expenses for accident years presented20 
Total net liability for unpaid claim and claim adjustment expenses$406 
Short-duration contracts reserve development
Net strengthening (releases) of prior accident year reserves is presented in the following table.
For the years ended December 31Calendar Year
(In millions)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021Total
Accident Year
2012$$(24)$(28)$(18)$(7)$(6)$(1)$(1)$(1)$(84)
2013(6)(9)(15)(4)(4)(1)— (38)
2014(30)(25)(9)(15)— (2)(80)
2015— (27)(25)(16)(5)(5)(78)
2016— (15)(25)(17)(3)(60)
2017(5)(12)(19)(13)(49)
2018(6)(17)(29)(52)
2019(7)(14)(21)
2020(9)(9)
Total net development for the accident years presented above(79)(67)(76)
Total net development for accident years prior to 2012(3)(2)
Total unallocated claim adjustment expense development(10)— — 
Total$(92)$(69)$(73)
(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, 2021
(In millions, except reported claims data)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$275 $289 $299 $303 $307 $299 $299 $297 $296 $295 $46,288 
2013246 265 265 249 245 245 241 241 241 39,430 
2014234 223 212 205 205 201 201 202 33,628 
2015201 199 190 190 183 181 183 30,427 
2016198 186 186 186 190 195 30,449 
2017199 198 200 221 232 30,940 
2018229 227 227 245 34,292 
2019257 266 289 31 37,142 
2020310 303 107 28,837 
2021397 271 27,182 
Total$2,582 $433 
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)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$78 $160 $220 $259 $282 $285 $290 $291 $291 $292 
201374 135 168 200 225 234 238 239 239 
201464 102 137 166 187 196 198 199 
201552 96 130 153 172 175 178 
201652 93 126 154 175 185 
201758 107 150 178 203 
201866 128 175 212 
201977 147 203 
202071 134 
202183 
Total$1,928 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$654 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2012
Liability for unallocated claim adjustment expenses for accident years presented14 
Total net liability for unpaid claim and claim adjustment expenses$673 
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)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021Total
Accident Year
2012$14 $10 $$$(8)$— $(2)$(1)$(1)$20 
201319 — (16)(4)— (4)— — (5)
2014(11)(11)(7)— (4)— (32)
2015(2)(9)— (7)(2)(18)
2016(12)— — (3)
2017(1)21 11 33 
2018(2)— 18 16 
201923 32 
2020(7)(7)
Total net development for the accident years presented above(17)31 52 
Total net development for accident years prior to 2012(7)
Total unallocated claim adjustment expense development(1)— — 
Total$(25)$33 $53 
(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, 2021
(In millions, except reported claims data)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$587 $611 $639 $636 $619 $635 $635 $630 $632 $632 $20 35,313 
2013650 655 650 655 613 623 620 623 624 24 33,706 
2014653 658 654 631 635 658 659 659 28 28,064 
2015581 576 574 589 600 602 617 42 24,118 
2016623 659 667 671 673 683 68 24,511 
2017632 632 632 634 630 67 22,195 
2018653 644 646 639 205 19,917 
2019680 682 682 330 18,602 
2020723 722 516 13,028 
2021782 706 9,759 
Total$6,670 $2,006 
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)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$28 $132 $247 $374 $454 $510 $559 $579 $597 $602 
201331 128 240 352 450 510 551 572 582 
201431 119 247 376 481 547 569 607 
201519 110 230 357 446 501 530 
201632 163 279 407 481 524 
201723 118 250 399 471 
201833 107 228 307 
201925 98 181 
202023 99 
202126 
Total$3,929 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$2,741 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2012119 
Liability for unallocated claim adjustment expenses for accident years presented51 
Total net liability for unpaid claim and claim adjustment expenses$2,911 
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)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021Total
Accident Year
2012$24 $28 $(3)$(17)$16 $— $(5)$$— $45 
2013(5)(42)10 (3)(26)
2014(4)(23)23 — 
2015(5)(2)15 11 15 36 
201636 10 60 
2017— — (4)(2)
2018(9)(7)(14)
2019— 
2020(1)(1)
Total net development for the accident years presented above21 16 14 
Total net development for accident years prior to 2012(4)(1)(1)
Total unallocated claim adjustment expense development(1)— 
Total$16 $15 $15 
(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, 2021
(In millions, except reported claims data)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$601 $627 $659 $669 $678 $673 $671 $668 $663 $664 $66 42,804 
2013537 572 592 618 593 582 561 552 548 91 38,867 
2014467 480 479 452 450 446 439 448 105 33,502 
2015422 431 406 408 394 382 372 101 31,894 
2016426 405 396 382 366 355 104 31,981 
2017440 432 421 400 402 92 33,121 
2018450 440 428 415 104 34,851 
2019452 449 437 134 34,248 
2020477 466 228 29,188 
2021468 300 25,711 
Total$4,575 $1,325 
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)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$87 $232 $342 $416 $470 $509 $524 $536 $538 $541 
201380 213 300 370 417 419 411 414 417 
201461 159 215 258 282 290 297 306 
201551 131 180 212 231 243 251 
201653 129 169 198 219 227 
201763 151 207 243 265 
201868 163 229 259 
201971 169 223 
202065 147 
202167 
Total$2,703 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$1,872 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 20121,941 
Other (2)
(14)
Liability for unallocated claim adjustment expenses for accident years presented51 
Total net liability for unpaid claim and claim adjustment expenses$3,850 
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)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021Total
Accident Year
2012$26 $32 $10 $$(5)$(2)$(3)$(5)$$63 
201335 20 26 (25)(11)(21)(9)(4)11 
201413 (1)(27)(2)(4)(7)(19)
2015(25)(14)(12)(10)(50)
2016(21)(9)(14)(16)(11)(71)
2017(8)(11)(21)(38)
2018(10)(12)(13)(35)
2019(3)(12)(15)
2020(11)(11)
Total net development for the accident years presented above(77)(85)(49)
Adjustment for development on a discounted basis
Total net development for accident years prior to 201238 (13)(35)
Total unallocated claim adjustment expense development23 — — 
Total$(13)$(96)$(82)
(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, 2021
(In millions, except reported claims data)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative Number of Claims
Accident Year
2012$278 $285 $269 $262 $261 $254 $247 $241 $236 $250 $16 24,998 
2013285 301 293 273 269 260 251 247 251 12 23,967 
2014288 303 303 291 283 300 301 294 16 24,946 
2015301 317 316 298 292 294 297 27 23,357 
2016296 315 300 297 287 302 37 17,776 
2017312 378 401 393 388 84 18,470 
2018384 402 407 406 81 20,726 
2019357 371 368 91 17,974 
2020398 389 184 13,909 
2021426 297 10,401 
Total$3,371 $845 
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)
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Accident Year
2012$46 $117 $151 $172 $188 $200 $210 $213 $215 $218 
201351 116 144 161 176 186 206 218 224 
201454 126 154 173 190 211 245 250 
201558 137 168 189 213 228 239 
201668 136 164 188 200 223 
201767 152 193 223 247 
201894 173 221 252 
201976 171 209 
202062 133 
202158 
Total$2,053 
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented$1,318 
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 201247 
Liability for unallocated claim adjustment expenses for accident years presented35 
Total net liability for unpaid claim and claim adjustment expenses$1,400 
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)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
Total (2)
Accident Year
2012$$(16)$(7)$(1)$(7)$(7)$(6)$(5)$14 $(28)
201316 (8)(20)(4)(9)(9)(4)(34)
201415 — (12)(8)17 (7)
201516 (1)(18)(6)(4)
201619 (15)(3)(10)15 
201766 23 (8)(5)76 
201818 (1)22 
201914 (3)11 
2020(9)(9)
(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 2021 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 101 presenting the detail of the development recorded within the International segment include the impact of fluctuations in foreign currency exchange rates.
v3.22.0.1
Reinsurance (Tables)
12 Months Ended
Dec. 31, 2021
Reinsurance Disclosures [Abstract]  
Components of Reinsurance Receivables
The following table presents the amounts receivable from reinsurers.
December 31
(In millions)20212020
Reinsurance receivables related to insurance reserves:
Ceded claim and claim adjustment expenses$4,969 $4,005 
Ceded future policy benefits288 263 
Reinsurance receivables related to paid losses227 210 
Reinsurance receivables5,484 4,478 
Allowance for uncollectible reinsurance(21)(21)
Reinsurance receivables, net of allowance for uncollectible reinsurance$5,463 $4,457 
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, 2021
A- to A++3,812 
B- to B++987
Insolvent3
Total voluntary reinsurance outstanding balance(1)
$4,802 
(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 %
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 %
2019 Earned Premiums
Property and casualty$11,021 $288 $4,401 $6,908 4.2 %
Long term care470 50 — 520 9.6 %
Total earned premiums$11,491 $338 $4,401 $7,428 4.6 %
(In millions)DirectAssumedCededNetAssumed/
Net %
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 %
2019 Written Premiums
Property and casualty$11,421 $281 $4,569 $7,133 3.9 %
Long term care473 50 — 523 9.6 %
Total written premiums$11,894 $331 $4,569 $7,656 4.3 %
v3.22.0.1
Debt (Tables)
12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Schedule of debt instruments
Debt is composed of the following long term obligations.
December 31
(In millions)20212020
Senior notes of CNAF:
3.950%, face amount of $550, due May 15, 2024
549 548 
4.500%, face amount of $500, due March 1, 2026
499 499 
3.450%, face amount of $500, due August 15, 2027
497 496 
3.900%, face amount of $500, due May 1, 2029
496 496 
2.050%, face amount of $500, due August 15, 2030
495 495 
Debenture of CNAF, 7.250%, face amount of $243, due November 15, 2023
243 242 
Total$2,779 $2,776 
Maturity of debt
The combined aggregate maturities for debt as of December 31, 2021 are presented in the following table.
(In millions)
2022$— 
2023243 
2024550 
2025— 
2026500 
Thereafter1,500 
Less: discount(14)
Total$2,779 
v3.22.0.1
Benefit Plans (Tables)
12 Months Ended
Dec. 31, 2021
Retirement Benefits [Abstract]  
Funded status
The following table presents a reconciliation of benefit obligations and plan assets.
Pension BenefitsPostretirement Benefits
(In millions)2021202020212020
Benefit obligation as of January 1$2,769 $2,661 $$
Changes in benefit obligation:
Interest cost62 80 — — 
Participants' contributions— — 
Actuarial (gain) loss(84)205 
Benefits paid(182)(173)(5)(5)
Foreign currency translation and other(2)— — 
Settlements(2)(7)— — 
Benefit obligation as of December 312,561 2,769 
Fair value of plan assets as of January 12,420 2,285 — — 
Change in plan assets:
Actual return on plan assets332 295 — — 
Company contributions10 16 
Participants' contributions— — 
Benefits paid(182)(173)(5)(5)
Foreign currency translation and other(1)— — 
Settlements(2)(7)— — 
Fair value of plan assets as of December 312,577 2,420 — — 
Funded status$16 $(349)$(6)$(7)
Amounts recognized on the Consolidated Balance Sheets as of December 31:
Other assets$77 $$— $— 
Other liabilities(61)(351)(6)(7)
Net amount recognized$16 $(349)$(6)$(7)
Amounts recognized in Accumulated other comprehensive income, not yet recognized in net periodic cost (benefit):
Net actuarial (gain) loss$763 $1,073 $$— 
Net amount recognized$763 $1,073 $$— 
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)202120202019
Net periodic pension cost (benefit)
Interest cost on projected benefit obligation$62 $80 $100 
Expected return on plan assets(154)(155)(142)
Amortization of net actuarial (gain) loss46 45 39 
Settlement loss— 
Total net periodic pension cost (benefit)$(45)$(27)$(3)
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)202120202019
Non-Service Cost (benefit):
Insurance claims and policyholder's benefits$(13)$(8)$(1)
Other operating expenses(32)(19)(2)
Total net periodic pension cost (benefit)$(45)$(27)$(3)
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)202120202019
Pension and postretirement benefits
Amounts arising during the period$262 $(67)$(112)
Settlement— 
Reclassification adjustment relating to prior service credit— — — 
Reclassification adjustment relating to actuarial loss46 45 39 
Total increase (decrease) in Other comprehensive income$309 $(19)$(73)
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 3120212020
Pension benefits
Discount rate2.750 %2.350 %
Interest crediting rate3.000 3.000 
Postretirement benefits
Discount rate2.250 %1.600 %
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 31202120202019
Pension benefits
Discount rate2.350 %3.150 %4.250 %
Expected long term rate of return6.750 7.250 7.500 
Interest crediting rate3.000 5.000 5.000 
Postretirement benefits
Discount rate1.600 %2.300 %3.550 %
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, 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$2,577 
December 31, 2020
(In millions)Level 1Level 2Level 3Total
Assets
Fixed maturity securities:
Corporate bonds and other$— $643 $$652 
States, municipalities and political subdivisions— 32 — 32 
Asset-backed— 98 — 98 
Total fixed maturity securities— 773 782 
Equity securities666 137 — 803 
Short term investments20 38 — 58 
Other assets— — 
Cash13 — — 13 
Total assets measured at fair value$699 $956 $1,664 
Total limited partnerships measured at net asset value (1)
756 
Total$2,420 
(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, 2021.
(In millions)Pension BenefitsPostretirement Benefits
2022$182 $
2023179 
2024177 
2025175 — 
2026173 — 
2027-2031798 
v3.22.0.1
Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2021
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 2021.
Number of AwardsWeighted Average Grant Date Fair Value
Balance as of January 1, 20212,439,141 $40.56 
Awards granted1,044,772 45.82 
Awards vested(789,495)46.13 
Awards forfeited, canceled or expired(355,881)40.19 
Performance-based adjustment37,061 43.70 
Balance as of December 31, 20212,375,598 41.21 
v3.22.0.1
Other Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2021
Intangible Assets, Gross (Excluding Goodwill) [Abstract]  
Schedule of Other Intangible Assets
Other intangible assets are presented in the following table.
December 3120212020
(In millions)Economic Useful LifeGross Carrying AmountAccumulated AmortizationGross Carrying AmountAccumulated Amortization
Finite-lived intangible assets:
Trade name8 years$$$
Distribution channel15 years11 11 
Total finite-lived intangible assets18 14 18 13 
Indefinite-lived intangible assets:
Syndicate capacity47 48 
Agency force16 16 
Total indefinite-lived intangible assets63 64 
Total other intangible assets$81 $14 $82 $13 
v3.22.0.1
Leases (Tables)
12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
Assets and liabilities
The following table presents operating lease ROU assets and lease liabilities.
(In millions)December 31, 2021December 31, 2020
Operating lease ROU assets$175 $199 
Operating lease liabilities248 279 
Operating lease, liability, maturity
The following table presents the maturities of operating lease liabilities
(In millions)December 31, 2021
2022$42 
202337 
202430 
202525 
202622 
Thereafter141 
Total lease payments297 
Less: Discount(49)
Total operating lease liabilities$248 
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, 2021December 31, 2020
Weighted average remaining lease term9.8 years10.3 years
Weighted average discount rate3.4 %3.4 %
v3.22.0.1
Stockholders' Equity and Statutory Accounting Practices (Tables)
12 Months Ended
Dec. 31, 2021
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)
2021 (1)
2020
2021 (1)
20202019
Combined Continental Casualty Companies$11,321 $10,708 $1,253 $800 $1,062 
(1) Information derived from the statutory-basis financial statements to be filed with insurance regulators.
v3.22.0.1
Accumulated Other Comprehensive Income (Loss) by Component (Tables)
12 Months Ended
Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income (Loss) by Component
The tables below display the changes in Accumulated other comprehensive income (loss) by component.
(In millions)Net unrealized gains (losses) on investments with an allowance for credit lossesNet unrealized gains (losses) on other investmentsPension and postretirement benefitsCumulative foreign currency translation adjustmentTotal
Balance as of January 1, 2021$— $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)$320 
(In millions)Net unrealized gains (losses) on investments with an allowance for credit lossesNet unrealized gains (losses) on other investmentsPension and postretirement benefitsCumulative foreign currency translation adjustmentTotal
Balance as of January 1, 2020$— $1,025 $(833)$(141)$51 
Other comprehensive income (loss) before reclassifications(43)763 (53)47 714 
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $12, $(12), $10, $— and $10
(43)43 (38)— (38)
Other comprehensive income (loss) net of tax (expense) benefit of $—, $(189), $4, $— and $(185)
— 720 (15)47 752 
Balance as of December 31, 2020$— $1,745 $(848)$(94)$803 
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, Net unrealized gains (losses) on investments with OTTI losses and Net unrealized gains (losses) on other investmentsNet investment gains (losses)
Pension and postretirement benefitsOther operating expenses and Insurance claims and policyholders' benefits
v3.22.0.1
Business Segments (Tables)
12 Months Ended
Dec. 31, 2021
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, 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
InternationalLife &
Group
Corporate
& Other
  
(In millions)EliminationsTotal
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 
December 31, 2020
(In millions)
Reinsurance receivables$886 $848 $302 $390 $2,052 $— $4,478 
Insurance receivables1,052 1,254 328 — 2,640 
Deferred acquisition costs330 281 97 — — — 708 
Goodwill117 — 31 — — — 148 
Deferred non-insurance warranty acquisition expense3,068 — — — — — 3,068 
Insurance reserves 
Claim and claim adjustment expenses5,748 8,250 2,091 3,743 2,874 — 22,706 
Unearned premiums2,635 1,824 546 114 — — 5,119 
Future policy benefits— — — 13,318 — — 13,318 
Deferred non-insurance warranty revenue4,023 — — — — — 4,023 
Year ended December 31, 2019
Specialty

Commercial
Life &
Group
Corporate
& Other
(In millions)InternationalEliminationsTotal
Net written premiums$2,848 $3,315 $971 $523 $$(2)$7,656 
Operating revenues 
Net earned premiums$2,773 $3,162 $974 $520 $$(2)$7,428 
Net investment income556 605 63 820 74 — 2,118 
Non-insurance warranty revenue1,161 — — — — — 1,161 
Other revenues29 — — (5)31 
Total operating revenues4,491 3,796 1,037 1,340 81 (7)10,738 
Claims, benefits and expenses     
Net incurred claims and benefits1,595 2,086 624 1,416 62 — 5,783 
Policyholders’ dividends18 — — — — 23 
Amortization of deferred acquisition costs610 537 236 — — — 1,383 
Non-insurance warranty expense1,082 — — — — — 1,082 
Other insurance related expenses292 505 130 115 (2)(2)1,038 
Other expenses48 32 144 (5)235 
Total claims, benefits and expenses3,632 3,178 998 1,539 204 (7)9,544 
Core income (loss) before income tax859 618 39 (199)(123)— 1,194 
Income tax (expense) benefit on core income (loss)(188)(138)(9)90 30 — (215)
Core income (loss)$671 $480 $30 $(109)$(93)$— 979 
Net investment gains (losses)29 
Income tax (expense) benefit on net investment gains (losses)(8)
Net investment gains (losses), after tax21 
Net income (loss)$1,000 
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)202120202019
Specialty
Management & Professional Liability$2,776 $2,577 $2,572 
Surety604 596 596 
Warranty & Alternative Risks1,624 1,412 1,323 
Specialty revenues5,004 4,585 4,491 
Commercial
Middle Market1,508 1,444 1,439 
Construction1,322 1,120 1,043 
Small Business558 482 504 
Other Commercial811 815 810 
Commercial revenues4,199 3,861 3,796 
International
Canada344 291 277 
Europe473 389 363 
Hardy297 318 397 
International revenues1,114 998 1,037 
Life & Group revenues1,457 1,355 1,340 
Corporate & Other revenues 21 69 81 
Eliminations(7)(6)(7)
Total operating revenues11,788 10,862 10,738 
Net investment gains (losses)120 (54)29 
Total revenues$11,908 $10,808 $10,767 
v3.22.0.1
Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)
shares in Thousands, $ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jan. 01, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Retained earnings     $ 9,663 $ 9,081    
Mortgage loans on real estate commercial and consumer allowance for credit loss     16 26    
Deferred income taxes     142 66    
Marketable securities fixed maturities allowance for credit loss     18 40    
Anticipated amounts due from insureds related to losses under deductible policies     $ 1,100 $ 1,200    
Structured settlement annuities, interest rate, low end     6.40%      
Structured settlement annuities, interest rate, high end       6.50%    
Discounted reserves for unfunded structured settlements     $ 503 $ 520    
Discounted reserves for unfunded structure settlements, discount amount     621 657    
Amount of interest recognized on the discounted reserves of unfunded structured settlements     $ 36 $ 35 $ 36  
Interest rates at which workers' compensation lifetime claim reserves are discounted at     3.50% 3.50%    
Workers' compensation liability     $ 228 $ 258    
Discounted reserves for workers’ compensation lifetime claim reserves, discount amount     97 113    
Amount of interest accretion recognized on the discounted reserves of workers’ compensation lifetime claim reserves     $ 12 $ 15 $ 21  
Long term care claim reserves weighted average discounted interest rate     5.80% 5.80%    
Discounted reserves for long term care claim reserves     $ 2,700 $ 2,700    
Premium deficiency     $ 428 $ 439    
Liability for future policy benefits, gross premium valuation, pretax margin $ 72 $ 72        
Minimum interest rate used to calculate reserves for long term care products     5.30% 5.40%    
Liability balance for guaranty fund     $ 79 $ 82    
Percentage of billed receivables compared to total reinsurance receivable     5.00%      
Policyholder dividends, rate on policy earnings     1.00% 1.00% 1.00%  
Increase (decrease) in shadow adjustment, net of tax     $ (296) $ 575    
Reduction of net unrealized gains on investments included in AOCI due to shadow adjustments     2,477 2,773    
Foreign currency transaction gain (loss), before tax     $ (1) $ 13 $ 1  
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)     1,000 770 960  
Antidilutive securities excluded from computation of earnings per share, amount     1 8 1  
Interest paid, net     $ 110 $ 124 $ 136  
Income taxes paid     $ 278 $ 108 $ 255  
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      
ASU 2016-13            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Retained earnings           $ (5)
Mortgage loans on real estate commercial and consumer allowance for credit loss           7
Deferred income taxes           2
Marketable securities fixed maturities allowance for credit loss           $ 6
CNAF Consolidated | Loews            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Noncontrolling interest, ownership percentage by parent     89.60%      
v3.22.0.1
Investments (Net investment income) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Net Investment Income [Line Items]      
Gross investment income $ 2,223 $ 1,999 $ 2,181
Investment expense (64) (64) (63)
Net investment income 2,159 1,935 2,118
Fixed maturity securities      
Net Investment Income [Line Items]      
Gross investment income 1,707 1,728 1,817
Equity securities      
Net Investment Income [Line Items]      
Gross investment income 83 65 85
Limited partnership investments      
Net Investment Income [Line Items]      
Gross investment income 362 121 180
Mortgage loans      
Net Investment Income [Line Items]      
Gross investment income 61 57 51
Short term investments      
Net Investment Income [Line Items]      
Gross investment income 1 9 34
Trading portfolio      
Net Investment Income [Line Items]      
Gross investment income 9 18 9
Other      
Net Investment Income [Line Items]      
Gross investment income $ 0 $ 1 $ 5
v3.22.0.1
Investments (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Gain (Loss) on Securities [Line Items]      
Non-income producing fixed maturity securities $ 1,000,000 $ 1,000,000  
Investments that exceed ten percent of stockholders' equity 0 0  
Mortgage loan losses due to changes in expected credit losses (10,000,000) 21,000,000 $ 0
Limited partnership investments 1,859,000,000 1,619,000,000  
Undistributed earnings of limited partnership investments $ 266,000,000 $ 235,000,000  
Percentage of limited partnerships reported on a current basis 32.00%    
Percentage of limited partnerships reported on a one month lag 6.00%    
Percentage of limited partnerships employing hedge fund strategies focused on fixed income and equity investments 32.00% 51.00%  
Limited partnerships invested in private debt and equity 68.00% 49.00%  
Carrying value of ten largest limited partnerships $ 665,000,000 $ 775,000,000  
Carrying value of limited partnerships as percentage of aggregate partnership equity 1.00% 2.00%  
Income as percentage of change in partnership equity for all limited partnerships 2.00% 2.00% 2.00%
Obligation to return cash $ 0 $ 0  
Notional value 270,000,000 190,000,000  
Derivative liability, fair value, gross liability (12,000,000) (19,000,000)  
Commitments to purchase or fund privately placed debt securities 1,230,000,000    
Commitments to sell various privately placed debt securities 90,000,000    
Carrying value of securities deposited under requirements of regulatory authorities 3,000,000,000 3,000,000,000  
Cash and securities deposited as collateral for letters of credit 1,200,000,000 1,100,000,000  
Non-Income Producing Mortgage Loans 7,000,000 0  
5.875% face amount of $500, due August 15, 2020 | Senior Notes      
Gain (Loss) on Securities [Line Items]      
Realized investment gains (losses)   (20,000,000) $ 21,000,000
Face amount   400,000,000 500,000,000
Common Stock      
Gain (Loss) on Securities [Line Items]      
Equity securities, FV-NI, gain (loss) 28,000,000 34,000,000  
Non-redeemable preferred stock      
Gain (Loss) on Securities [Line Items]      
Equity securities, FV-NI, gain (loss) 2,000,000 (3,000,000)  
Fixed maturity securities      
Gain (Loss) on Securities [Line Items]      
Debt securities, available-for-sale, accrued interest, after allowance for credit loss 369,000,000 371,000,000  
OCI, debt securities, available-for-sale, gain (loss), after adjustment, before tax (1,272,000,000) $ 1,637,000,000 $ 2,620,000,000
Mortgage loans      
Gain (Loss) on Securities [Line Items]      
Financing receivable, accrued interest, after allowance for credit loss $ 3,000,000    
v3.22.0.1
Investments (Net realized investment gains (losses)) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Fixed maturity securities:      
Gross gains $ 186 $ 220 $ 125
Gross losses (90) (220) (131)
Net investment gains (losses) on fixed maturity securities 96 0 (6)
Equity securities 4 (3) 66
Derivatives 6 (10) (11)
Mortgage loans 10 (21) 0
Short term investments and other 4 (20) (20)
Net investment gains (losses) $ 120 $ (54) $ 29
v3.22.0.1
Investments (Allowance on available-for-sale securities with credit impairments and PCD assets activity) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Allowance for credit losses:    
Balance, beginning of period $ 40 $ 0
Additions to the allowance for credit losses:    
Securities for which credit losses were not previously recorded 14 79
Available-for-sale securities accounted for as PCD assets 11 5
Reductions to the allowance for credit losses:    
Securities sold during the period (realized) 24 22
Intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost basis 0 1
Write-offs charged against the allowance 16 0
Recoveries of amounts previously written off 0 0
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period (7) (27)
Balance, end of period 18 40
Impact of adopting ASC 326    
Allowance for credit losses:    
Balance, beginning of period   6
Corporate and other bonds    
Allowance for credit losses:    
Balance, beginning of period 23 0
Additions to the allowance for credit losses:    
Securities for which credit losses were not previously recorded 14 67
Available-for-sale securities accounted for as PCD assets 5 5
Reductions to the allowance for credit losses:    
Securities sold during the period (realized) 7 22
Intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost basis 0 1
Write-offs charged against the allowance 16 0
Recoveries of amounts previously written off 0 0
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period (8) (32)
Balance, end of period 11 23
Corporate and other bonds | Impact of adopting ASC 326    
Allowance for credit losses:    
Balance, beginning of period   6
Asset-backed    
Allowance for credit losses:    
Balance, beginning of period 17 0
Additions to the allowance for credit losses:    
Securities for which credit losses were not previously recorded 0 12
Available-for-sale securities accounted for as PCD assets 6 0
Reductions to the allowance for credit losses:    
Securities sold during the period (realized) 17 0
Intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost basis 0 0
Write-offs charged against the allowance 0 0
Recoveries of amounts previously written off 0 0
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period 1 5
Balance, end of period $ 7 17
Asset-backed | Impact of adopting ASC 326    
Allowance for credit losses:    
Balance, beginning of period   $ 0
v3.22.0.1
Investments (Components of other-than-temporary impairment losses recognized in earnings) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]      
Impairment (gains) losses recognized in earnings $ 31 $ 111 $ 44
Corporate and other bonds      
Debt Securities, Available-for-sale [Line Items]      
Impairment (gains) losses recognized in earnings 11 87 33
Asset-backed      
Debt Securities, Available-for-sale [Line Items]      
Impairment (gains) losses recognized in earnings $ 20 $ 24 $ 11
v3.22.0.1
Investments (Summary of fixed maturity and equity securities) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Fixed maturity securities available-for-sale:      
Gross Unrealized Gains $ 4,558 $ 5,795  
Gross Unrealized Losses 112 77  
Allowance for Credit Losses 18 40 $ 0
Estimated Fair Value 44,373 44,604  
Total fixed maturity securities trading      
Debt securities, amortized cost 39,952 38,953  
Total fixed maturity securities 44,380 44,631  
Corporate and other bonds      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 21,444 20,792  
Gross Unrealized Gains 2,755 3,578  
Gross Unrealized Losses 56 22  
Allowance for Credit Losses 11 23 0
Estimated Fair Value 24,132 24,325  
Total fixed maturity securities trading      
Total fixed maturity securities 24,852 25,234  
States, municipalities and political subdivisions      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 10,358 9,729  
Gross Unrealized Gains 1,599 1,863  
Gross Unrealized Losses 14 0  
Allowance for Credit Losses 0 0  
Estimated Fair Value 11,943 11,592  
Total fixed maturity securities trading      
Total fixed maturity securities 11,943 11,592  
Residential mortgage-backed      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 2,893 3,442  
Gross Unrealized Gains 71 146  
Gross Unrealized Losses 8 1  
Allowance for Credit Losses 0 0  
Estimated Fair Value 2,956 3,587  
Commercial mortgage-backed      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 1,987 1,933  
Gross Unrealized Gains 63 93  
Gross Unrealized Losses 19 42  
Allowance for Credit Losses 0 17  
Estimated Fair Value 2,031 1,967  
Other asset-backed      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 2,561 2,179  
Gross Unrealized Gains 54 81  
Gross Unrealized Losses 10 9  
Allowance for Credit Losses 7 0  
Estimated Fair Value 2,598 2,251  
Asset-backed      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 7,441 7,554  
Gross Unrealized Gains 188 320  
Gross Unrealized Losses 37 52  
Allowance for Credit Losses 7 17 $ 0
Estimated Fair Value 7,585 7,805  
Total fixed maturity securities trading      
Total fixed maturity securities 7,585 7,805  
U.S. Treasury and obligations of government-sponsored enterprises      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 132 339  
Gross Unrealized Gains 1 2  
Gross Unrealized Losses 3 3  
Allowance for Credit Losses 0 0  
Estimated Fair Value 130 338  
Foreign government      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 570 512  
Gross Unrealized Gains 15 32  
Gross Unrealized Losses 2 0  
Allowance for Credit Losses 0 0  
Estimated Fair Value 583 544  
Fixed maturity securities      
Fixed maturity securities available-for-sale:      
Cost or Amortized Cost 39,945 38,926  
Gross Unrealized Gains 4,558 5,795  
Gross Unrealized Losses 112 77  
Allowance for Credit Losses 18 40  
Estimated Fair Value 44,373 44,604  
Total fixed maturity securities trading      
Total fixed maturity securities trading      
Cost or amortized cost, trading securities 7 27  
Estimated fair value, trading securities $ 7 $ 27  
v3.22.0.1
Investments (Securities in a gross unrealized loss position) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months $ 5,695 $ 1,666
Gross Unrealized Losses, Less than 12 Months 92 74
Estimated Fair Value, 12 Months or Longer 370 64
Gross Unrealized Losses, 12 Months or Longer 20 3
Estimated Fair Value, Total 6,065 1,730
Gross Unrealized Losses, Total 112 77
Corporate and other bonds    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 2,389 609
Gross Unrealized Losses, Less than 12 Months 48 21
Estimated Fair Value, 12 Months or Longer 136 12
Gross Unrealized Losses, 12 Months or Longer 8 1
Estimated Fair Value, Total 2,525 621
Gross Unrealized Losses, Total 56 22
States, municipalities and political subdivisions    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 730 33
Gross Unrealized Losses, Less than 12 Months 14 0
Estimated Fair Value, 12 Months or Longer 0 0
Gross Unrealized Losses, 12 Months or Longer 0 0
Estimated Fair Value, Total 730 33
Gross Unrealized Losses, Total 14  
Residential mortgage-backed    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 1,043 71
Gross Unrealized Losses, Less than 12 Months 8 1
Estimated Fair Value, 12 Months or Longer 0 11
Gross Unrealized Losses, 12 Months or Longer 0 0
Estimated Fair Value, Total 1,043 82
Gross Unrealized Losses, Total 8 1
Commercial mortgage-backed    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 527 533
Gross Unrealized Losses, Less than 12 Months 7 40
Estimated Fair Value, 12 Months or Longer 167 28
Gross Unrealized Losses, 12 Months or Longer 12 2
Estimated Fair Value, Total 694 561
Gross Unrealized Losses, Total 19 42
Other asset-backed    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 840 344
Gross Unrealized Losses, Less than 12 Months 10 9
Estimated Fair Value, 12 Months or Longer 62 13
Gross Unrealized Losses, 12 Months or Longer 0 0
Estimated Fair Value, Total 902 357
Gross Unrealized Losses, Total 10 9
Asset-backed    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 2,410 948
Gross Unrealized Losses, Less than 12 Months 25 50
Estimated Fair Value, 12 Months or Longer 229 52
Gross Unrealized Losses, 12 Months or Longer 12 2
Estimated Fair Value, Total 2,639 1,000
Gross Unrealized Losses, Total 37 52
U.S. Treasury and obligations of government-sponsored enterprises    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 69 63
Gross Unrealized Losses, Less than 12 Months 3 3
Estimated Fair Value, 12 Months or Longer 5 0
Gross Unrealized Losses, 12 Months or Longer 0 0
Estimated Fair Value, Total 74 63
Gross Unrealized Losses, Total 3 3
Foreign government    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value, Less than 12 months 97 13
Gross Unrealized Losses, Less than 12 Months 2 0
Estimated Fair Value, 12 Months or Longer 0 0
Gross Unrealized Losses, 12 Months or Longer 0 0
Estimated Fair Value, Total 97 13
Gross Unrealized Losses, Total $ 2 $ 0
v3.22.0.1
Investments (Contractual maturity) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Investments [Abstract]    
Due in one year or less, cost or amortized cost $ 1,603 $ 1,456
Due after one year through five years, cost or amortized cost 10,637 12,304
Due after five years through ten years, cost or amortized cost 13,294 12,319
Due after ten years, cost or amortized cost 14,411 12,847
Cost or Amortized Cost 39,945 38,926
Due in one year or less, estimated fair value 1,624 1,458
Due after one year through five years, estimated fair value 11,229 13,098
Due after five years through ten years, estimated fair value 14,338 13,878
Due after ten years, estimated fair value 17,182 16,170
Estimated Fair Value $ 44,373 $ 44,604
v3.22.0.1
Investments (Credit quality indicator) (Details) - Mortgage loans
$ in Millions
Dec. 31, 2021
USD ($)
Debt Securities, Available-for-sale [Line Items]  
2021 $ 95
2020 160
2019 249
2018 79
2017 152
Prior 254
Total 989
DSCR ≥1.6x | LTV less than 55%  
Debt Securities, Available-for-sale [Line Items]  
2021 2
2020 75
2019 6
2018 38
2017 99
Prior 181
Total 401
DSCR ≥1.6x | LTV 55% to 65%  
Debt Securities, Available-for-sale [Line Items]  
2021 5
2020 38
2019 15
2018 17
2017 0
Prior 24
Total 99
DSCR ≥1.6x | LTV greater than 65%  
Debt Securities, Available-for-sale [Line Items]  
2021 17
2020 0
2019 8
2018 0
2017 0
Prior 0
Total 25
DSCR 1.2x - 1.6x | LTV less than 55%  
Debt Securities, Available-for-sale [Line Items]  
2021 14
2020 14
2019 95
2018 0
2017 5
Prior 42
Total 170
DSCR 1.2x - 1.6x | LTV 55% to 65%  
Debt Securities, Available-for-sale [Line Items]  
2021 36
2020 0
2019 0
2018 24
2017 10
Prior 0
Total 70
DSCR 1.2x - 1.6x | LTV greater than 65%  
Debt Securities, Available-for-sale [Line Items]  
2021 0
2020 24
2019 0
2018 0
2017 8
Prior 0
Total 32
DSCR ≤1.2 | LTV less than 55%  
Debt Securities, Available-for-sale [Line Items]  
2021 0
2020 0
2019 35
2018 0
2017 30
Prior 0
Total 65
DSCR ≤1.2 | LTV 55% to 65%  
Debt Securities, Available-for-sale [Line Items]  
2021 0
2020 0
2019 28
2018 0
2017 0
Prior 0
Total 28
DSCR ≤1.2 | LTV greater than 65%  
Debt Securities, Available-for-sale [Line Items]  
2021 21
2020 9
2019 62
2018 0
2017 0
Prior 7
Total $ 99
v3.22.0.1
Fair Value (Assets and liabilities measured at fair value on a recurring basis) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Fixed maturity securities:    
Fixed maturity securities $ 44,380 $ 44,631
Equity securities:    
Equity securities 1,035 992
Short term and other 1,872 1,789
Total assets 47,287 47,412
Other liabilities 12 19
Total liabilities 12 19
Corporate and other bonds    
Fixed maturity securities:    
Fixed maturity securities 24,852 25,234
States, municipalities and political subdivisions    
Fixed maturity securities:    
Fixed maturity securities 11,943 11,592
Asset-backed    
Fixed maturity securities:    
Fixed maturity securities 7,585 7,805
Common Stock    
Equity securities:    
Equity securities 233 195
Non-redeemable preferred stock    
Equity securities:    
Equity securities 802 797
Level 1    
Fixed maturity securities:    
Fixed maturity securities 140 355
Equity securities:    
Equity securities 285 243
Short term and other 1,798 1,761
Total assets 2,223 2,359
Other liabilities 0 0
Total liabilities 0 0
Level 1 | Corporate and other bonds    
Fixed maturity securities:    
Fixed maturity securities 140 355
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 220 175
Level 1 | Non-redeemable preferred stock    
Equity securities:    
Equity securities 65 68
Level 2    
Fixed maturity securities:    
Fixed maturity securities 42,691 43,152
Equity securities:    
Equity securities 721 722
Short term and other 74 28
Total assets 43,486 43,902
Other liabilities 12 19
Total liabilities 12 19
Level 2 | Corporate and other bonds    
Fixed maturity securities:    
Fixed maturity securities 23,775 24,109
Level 2 | States, municipalities and political subdivisions    
Fixed maturity securities:    
Fixed maturity securities 11,887 11,546
Level 2 | Asset-backed    
Fixed maturity securities:    
Fixed maturity securities 7,029 7,497
Level 2 | Common Stock    
Equity securities:    
Equity securities 0 0
Level 2 | Non-redeemable preferred stock    
Equity securities:    
Equity securities 721 722
Level 3    
Fixed maturity securities:    
Fixed maturity securities 1,549 1,124
Equity securities:    
Equity securities 29 27
Short term and other 0 0
Total assets 1,578 1,151
Other liabilities 0 0
Total liabilities 0 0
Level 3 | Corporate and other bonds    
Fixed maturity securities:    
Fixed maturity securities 937 770
Level 3 | States, municipalities and political subdivisions    
Fixed maturity securities:    
Fixed maturity securities 56 46
Level 3 | Asset-backed    
Fixed maturity securities:    
Fixed maturity securities 556 308
Level 3 | Common Stock    
Equity securities:    
Equity securities 13 20
Level 3 | Non-redeemable preferred stock    
Equity securities:    
Equity securities $ 16 $ 7
v3.22.0.1
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, 2021
Dec. 31, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, Beginning, Assets $ 1,151 $ 651
Reported in Other comprehensive income (loss) (43) 60
Total realized and unrealized investment gains (losses) (46) 56
Purchases 612 478
Sales (32) (12)
Settlements (130) (45)
Transfers into Level 3 150 40
Transfers out of Level 3 (127) (17)
Balance, Ending, Assets 1,578 1,151
Unrealized gains (losses) on Level 3 assets and liabilities recognized in Net income (loss) in the period (2) (6)
Unrealized gains (losses) on Level 3 assets and liabilities recognized in Other comprehensive income (loss) in the period (44) 62
Corporate and other bonds    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, Beginning, Assets 770 468
Reported in Other comprehensive income (loss) (32) 43
Total realized and unrealized investment gains (losses) (42) 44
Purchases 312 264
Sales (3) (3)
Settlements (68) (13)
Transfers into Level 3 20 10
Transfers out of Level 3 (52) 0
Balance, Ending, Assets 937 770
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 (32) 43
States, municipalities and political subdivisions    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, Beginning, Assets 46 0
Reported in Other comprehensive income (loss) (1) 1
Total realized and unrealized investment gains (losses) (1) 1
Purchases 12 45
Sales 0 0
Settlements (1) 0
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance, Ending, Assets 56 46
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 (1) 1
Asset-backed    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, Beginning, Assets 308 165
Reported in Other comprehensive income (loss) (10) 16
Total realized and unrealized investment gains (losses) (3) 17
Purchases 287 154
Sales (9) (9)
Settlements (61) (32)
Transfers into Level 3 109 30
Transfers out of Level 3 (75) (17)
Balance, Ending, Assets 556 308
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 (11) 18
Equity securities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, Beginning, Assets 27 18
Reported in Other comprehensive income (loss) 0 0
Total realized and unrealized investment gains (losses) 0 (6)
Purchases 1 15
Sales (20) 0
Settlements 0 0
Transfers into Level 3 21 0
Transfers out of Level 3 0 0
Balance, Ending, Assets 29 27
Unrealized gains (losses) on Level 3 assets and liabilities recognized in Net income (loss) in the period (2) (6)
Unrealized gains (losses) on Level 3 assets and liabilities recognized in Other comprehensive income (loss) in the period 0 0
Reported in Net investment gains (losses)    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Reported in Net investment gains (losses) (12) (4)
Reported in Net investment gains (losses) | Corporate and other bonds    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Reported in Net investment gains (losses) (10) 1
Reported in Net investment gains (losses) | States, municipalities and political subdivisions    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Reported in Net investment gains (losses) 0 0
Reported in Net investment gains (losses) | Asset-backed    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Reported in Net investment gains (losses) 0 (1)
Reported in Net investment gains (losses) | Equity securities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Reported in Net investment gains (losses) (2) (4)
Reported in Net investment income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Reported in Net investment income 9 0
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 0 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 7 2
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 $ 2 $ (2)
v3.22.0.1
Fair Value (Narrative) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Fair Value Disclosures [Abstract]    
Other invested assets overseas deposit $ 74 $ 71
v3.22.0.1
Fair Value (Quantitative information about significant unobservable inputs in the fair value measurement of level 3 assets) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Estimated fair value $ 47,287 $ 47,412
Fixed maturity securities | Discounted cash flow    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Estimated fair value $ 1,225 $ 966
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 0.07 0.08
Credit spread | Discounted cash flow | Weighted Average    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Debt securities, available-for-sale, measurement Input 0.02 0.03
v3.22.0.1
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, 2021
Dec. 31, 2020
Assets    
Mortgage loans $ 973 $ 1,068
Liabilities    
Long term debt 2,779 2,776
Carrying Amount    
Assets    
Mortgage loans 973 1,068
Liabilities    
Long term debt 2,779 2,776
Estimated Fair Value    
Assets    
Mortgage loans 1,018 1,151
Liabilities    
Long term debt 2,978 3,148
Level 1 | Estimated Fair Value    
Assets    
Mortgage loans 0 0
Liabilities    
Long term debt 0 0
Level 2 | Estimated Fair Value    
Assets    
Mortgage loans 0 0
Liabilities    
Long term debt 2,978 3,148
Level 3 | Estimated Fair Value    
Assets    
Mortgage loans 1,018 1,151
Liabilities    
Long term debt $ 0 $ 0
v3.22.0.1
Income Taxes (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
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 18,000,000 16,000,000 19,000,000
Income (loss) from continuing foreign operations 124,000,000 45,000,000 43,000,000
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 238,000,000 $ 65,000,000 $ 239,000,000
Foreign Tax Authority      
Income Tax Contingency [Line Items]      
Operating loss carryforwards 138,000,000    
Tax credit carryforward, amount 4,000,000    
Operating loss carryforwards, subject to expiration 1,000,000    
Operating loss carryforwards, not subject to expiration $ 137,000,000    
v3.22.0.1
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, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]      
Income tax expense at statutory rates $ (312) $ (172) $ (257)
Tax benefit from tax exempt income 51 52 53
Foreign taxes and credits (3) 2 (1)
State income tax expense (13) (6) (14)
Other tax expense (5) (7) (4)
Income tax expense $ (282) $ (131) $ (223)
v3.22.0.1
Income Taxes (Current and deferred components of the Company's income tax (expense) benefit) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]      
Current tax expense $ (235) $ (180) $ (269)
Deferred tax (expense) benefit (47) 49 46
Income tax expense $ (282) $ (131) $ (223)
v3.22.0.1
Income Taxes (Significant components of the Company's deferred tax assets and liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Deferred Tax Assets:    
Property and casualty claim and claim adjustment expense reserves $ 173 $ 157
Unearned premium reserves 193 174
Deferred Revenue 64 62
Employee benefits 46 122
Deferred retroactive reinsurance benefit 90 83
Other assets 88 92
Gross deferred tax assets 654 690
Deferred Tax Liabilities:    
Investment valuation differences 93 28
Deferred acquisition costs 99 93
Net unrealized gains 272 453
Software and hardware 27 31
Other liabilities 21 19
Gross deferred tax liabilities 512 624
Net deferred tax asset $ 142 $ 66
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Reconciliation of Liability for Unpaid Claim and Claim Adjustment Expense) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Liability for Claims and Claims Adjustment Expense [Line Items]        
Total Net Carried Claim and Claim Adjustment Expense Reserves $ 19,205 $ 18,701 $ 17,885 $ 17,965
Reinsurance receivables 4,969      
Total gross liability for unpaid claim and claim adjustment expenses 24,174 22,706    
Specialty        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Total Net Carried Claim and Claim Adjustment Expense Reserves 5,265 4,898    
Reinsurance receivables 1,168      
Commercial        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Total Net Carried Claim and Claim Adjustment Expense Reserves 8,065 7,475    
Reinsurance receivables 825      
International        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Total Net Carried Claim and Claim Adjustment Expense Reserves 1,940 1,822    
Reinsurance receivables 340      
Life and Group        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Total Net Carried Claim and Claim Adjustment Expense Reserves 3,641      
Reinsurance receivables 113      
Corporate & Other        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Total Net Carried Claim and Claim Adjustment Expense Reserves 294 $ 891    
Reinsurance receivables $ 2,523      
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Reconciliation of Claim and Claim Adjustment Expense Reserves) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reserves, beginning of year:      
Gross $ 22,706 $ 21,720 $ 21,984
Ceded 4,005 3,835 4,019
Net reserves, beginning of year 18,701 17,885 17,965
Reduction of net reserves due to Excess Workers' Compensation Loss Portfolio Transfer (632) 0 0
Net incurred claim and claim adjustment expenses:      
Provision for insured events of current year 5,970 5,793 5,356
Increase (decrease) in provision for insured events of prior years (104) (119) (127)
Amortization of discount 174 183 184
Total net incurred 6,040 5,857 5,413
Net payments attributable to:      
Current year events (1,014) (948) (992)
Prior year events (3,830) (4,216) (4,584)
Total net payments (4,844) (5,164) (5,576)
Foreign currency translation adjustment and other (60) 123 83
Net reserves, end of year 19,205 18,701 17,885
Ceded reserves, end of year 4,969 4,005 3,835
Gross reserves, end of year $ 24,174 $ 22,706 $ 21,720
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Gross and Net Carried Claim and Claim Adjustment Expense Reserves) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Liability for Claims and Claims Adjustment Expense [Line Items]        
Gross Case Reserves $ 10,555 $ 10,694    
Gross IBNR Reserves 13,619 12,012    
Total Gross Carried Claim and Claim Adjustment Expense Reserves 24,174 22,706 $ 21,720 $ 21,984
Net Case Reserves 8,369 8,930    
Net IBNR Reserves 10,836 9,771    
Total Net Carried Claim and Claim Adjustment Expense Reserves 19,205 18,701 $ 17,885 $ 17,965
Specialty        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Gross Case Reserves 1,578 1,567    
Gross IBNR Reserves 4,855 4,181    
Total Gross Carried Claim and Claim Adjustment Expense Reserves 6,433 5,748    
Net Case Reserves 1,338 1,410    
Net IBNR Reserves 3,927 3,488    
Total Net Carried Claim and Claim Adjustment Expense Reserves 5,265 4,898    
Commercial        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Gross Case Reserves 3,184 3,215    
Gross IBNR Reserves 5,706 5,035    
Total Gross Carried Claim and Claim Adjustment Expense Reserves 8,890 8,250    
Net Case Reserves 2,850 2,885    
Net IBNR Reserves 5,215 4,590    
Total Net Carried Claim and Claim Adjustment Expense Reserves 8,065 7,475    
International        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Gross Case Reserves 859 892    
Gross IBNR Reserves 1,421 1,199    
Total Gross Carried Claim and Claim Adjustment Expense Reserves 2,280 2,091    
Net Case Reserves 744 777    
Net IBNR Reserves 1,196 1,045    
Total Net Carried Claim and Claim Adjustment Expense Reserves 1,940 1,822    
Life & Group        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Gross Case Reserves 3,383 3,406    
Gross IBNR Reserves 371 337    
Total Gross Carried Claim and Claim Adjustment Expense Reserves 3,754 3,743    
Net Case Reserves 3,291 3,298    
Net IBNR Reserves 350 317    
Total Net Carried Claim and Claim Adjustment Expense Reserves 3,641 3,615    
Corporate & Other        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Gross Case Reserves 1,551 1,614    
Gross IBNR Reserves 1,266 1,260    
Total Gross Carried Claim and Claim Adjustment Expense Reserves 2,817 2,874    
Net Case Reserves 146 560    
Net IBNR Reserves 148 331    
Total Net Carried Claim and Claim Adjustment Expense Reserves $ 294 $ 891    
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Net Prior Year Development) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]      
Pretax (favorable) unfavorable premium development, excluding Life & Group $ 11 $ (20) $ (73)
Specialty      
Segment Reporting Information [Line Items]      
Pretax (favorable) unfavorable premium development, excluding Life & Group (45) (61) (92)
Commercial      
Segment Reporting Information [Line Items]      
Pretax (favorable) unfavorable premium development, excluding Life & Group (6) (7) (40)
International      
Segment Reporting Information [Line Items]      
Pretax (favorable) unfavorable premium development, excluding Life & Group 2 (2) 21
Corporate & Other      
Segment Reporting Information [Line Items]      
Pretax (favorable) unfavorable premium development, excluding Life & Group $ 60 $ 50 $ 38
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Narrative) (Details) - USD ($)
3 Months Ended 12 Months Ended 13 Months Ended
Feb. 05, 2021
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Feb. 05, 2021
Dec. 31, 2011
Dec. 31, 2010
Liability for Claims and Claims Adjustment Expense [Line Items]                
Pretax (favorable) unfavorable premium development, excluding Life & Group     $ 11,000,000 $ (20,000,000) $ (73,000,000)      
Funds held under reinsurance agreements, liability $ 690,000,000   4,000,000,000 3,300,000,000   $ 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     634,000,000          
Corporate & Other                
Liability for Claims and Claims Adjustment Expense [Line Items]                
Pretax (favorable) unfavorable premium development, excluding Life & Group     60,000,000 50,000,000 38,000,000      
Commercial                
Liability for Claims and Claims Adjustment Expense [Line Items]                
Pretax (favorable) unfavorable premium development, excluding Life & Group     (6,000,000) (7,000,000) (40,000,000)      
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 $ 2,200,000,000
Net A&EP adverse development before consideration of LPT     143,000,000 125,000,000 150,000,000      
Provision for uncollectible third-party reinsurance, released     5,000,000 25,000,000 $ 25,000,000      
Cumulative amounts ceded under AEP Loss Portfolio Transfer     3,400,000,000 3,300,000,000        
Deferred reinsurance benefit yet to be recognized     429,000,000 $ 398,000,000        
Fair value of collateral trust account established by NICO under A&EP Loss Portfolio Transfer     3,100,000,000          
Excess Workers' Compensation LPT                
Liability for Claims and Claims Adjustment Expense [Line Items]                
Funds held under reinsurance agreements, liability     $ 690,000,000          
v3.22.0.1
Claim, Claim Adjustment Expense 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, 2021
Dec. 31, 2020
Dec. 31, 2019
Liability for Claims and Claims Adjustment Expense [Line Items]      
Medical Professional Liability $ 23 $ 35 $ 75
Other Professional Liability and Management Liability 24 (15) (69)
Surety (73) (69) (92)
Warranty (14) (7) (15)
Other (5) (5) 9
Total pretax (favorable) unfavorable development $ (45) $ (61) $ (92)
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Specialty - Line of Business Composition) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses $ 19,205 $ 18,701 $ 17,885 $ 17,965
Specialty        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 5,265 $ 4,898    
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 1,556      
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 3,159      
Surety | Specialty        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 406      
Warranty | Specialty        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 44      
Other | Specialty        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses $ 100      
v3.22.0.1
Claim, Claim Adjustment Expense 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, 2021
USD ($)
claim
Dec. 31, 2020
USD ($)
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 ($)
Dec. 31, 2012
USD ($)
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 4,776                  
IBNR 1,016                  
2012                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 497 $ 497 $ 499 $ 493 $ 484 $ 493 $ 498 $ 508 $ 469 $ 464
IBNR $ 4                  
Cumulative Number of Claims | claim 17,755                  
2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 530 531 545 535 525 513 500 479 $ 462  
IBNR $ 11                  
Cumulative Number of Claims | claim 19,565                  
2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 524 527 529 535 530 537 489 $ 450    
IBNR $ 8                  
Cumulative Number of Claims | claim 19,800                  
2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 501 510 488 494 510 499 $ 433      
IBNR $ 28                  
Cumulative Number of Claims | claim 18,170                  
2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 510 508 499 485 487 $ 427        
IBNR $ 24                  
Cumulative Number of Claims | claim 16,085                  
2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 455 460 458 449 $ 412          
IBNR $ 41                  
Cumulative Number of Claims | claim 15,197                  
2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 448 431 429 $ 404            
IBNR $ 60                  
Cumulative Number of Claims | claim 14,997                  
2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 458 445 $ 430              
IBNR $ 156                  
Cumulative Number of Claims | claim 13,804                  
2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 476 $ 477                
IBNR $ 347                  
Cumulative Number of Claims | claim 9,935                  
2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 377                  
IBNR $ 337                  
Cumulative Number of Claims | claim 6,761                  
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Specialty - Medical Professional Liability - Net Cumulative Paid Claim and Claim Adjustment Expenses) (Details) - USD ($)
$ in Millions
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
Dec. 31, 2012
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,205 $ 18,701 $ 17,885 $ 17,965            
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 5,265 4,898                
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 3,276                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 1,500                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2012 28                  
Liability for unallocated claim adjustment expenses for accident years presented 28                  
Total net liability for unpaid claim and claim adjustment expenses 1,556                  
Medical Professional Liability | 2012 | Specialty                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 487 482 479 457 $ 427 $ 388 $ 323 $ 221 $ 117 $ 14
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 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 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 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 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 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 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 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 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 $ 11                  
v3.22.0.1
Claim, Claim Adjustment Expense 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, 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
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Claims Development [Line Items]                                    
Total $ 23 $ 35 $ 75                              
Medical Professional Liability                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 13 32 52                              
Total net development for accident years prior to 2012 3 3 21                              
Total unallocated claim adjustment expense development 7 0 2                              
Total 23 35 75                              
Medical Professional Liability | 2012                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 0 (2) 6 $ 9 $ (9) $ (5) $ (10) $ 39 $ 5                 $ 33
Medical Professional Liability | 2013                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (1) (14) 10 10 12 13 21 $ 17                 $ 68  
Medical Professional Liability | 2014                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (3) (2) (6) 5 (7) 48 $ 39                 $ 74    
Medical Professional Liability | 2015                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (9) 22 (6) (16) 11 $ 66                 $ 68      
Medical Professional Liability | 2016                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 2 9 14 (2) $ 60                 $ 83        
Medical Professional Liability | 2017                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (5) 2 9 $ 37                 $ 43          
Medical Professional Liability | 2018                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 17 2 $ 25                 $ 44            
Medical Professional Liability | 2019                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 13 $ 15                 $ 28              
Medical Professional Liability | 2020                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims $ (1)                 $ (1)                
v3.22.0.1
Claim, Claim Adjustment Expense 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, 2021
USD ($)
claim
Dec. 31, 2020
USD ($)
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 ($)
Dec. 31, 2012
USD ($)
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 8,767                  
IBNR 2,326                  
2012                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 848 $ 850 $ 831 $ 833 $ 846 $ 840 $ 878 $ 887 $ 909 $ 923
IBNR $ 18                  
Cumulative Number of Claims | claim 18,506                  
2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 833 846 850 863 866 885 926 894 $ 884  
IBNR $ 30                  
Cumulative Number of Claims | claim 17,950                  
2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 841 845 854 835 831 885 898 $ 878    
IBNR $ 37                  
Cumulative Number of Claims | claim 17,577                  
2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 836 813 807 832 877 892 $ 888      
IBNR $ 41                  
Cumulative Number of Claims | claim 17,436                  
2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 891 907 904 900 900 $ 901        
IBNR $ 84                  
Cumulative Number of Claims | claim 17,968                  
2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 775 791 813 845 $ 847          
IBNR $ 152                  
Cumulative Number of Claims | claim 18,159                  
2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 906 869 864 $ 850            
IBNR $ 202                  
Cumulative Number of Claims | claim 19,926                  
2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 856 845 $ 837              
IBNR $ 283                  
Cumulative Number of Claims | claim 19,357                  
2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 944 $ 930                
IBNR $ 568                  
Cumulative Number of Claims | claim 19,095                  
2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 1,037                  
IBNR $ 911                  
Cumulative Number of Claims | claim 15,487                  
v3.22.0.1
Claim, Claim Adjustment Expense 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, 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
Dec. 31, 2012
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,205 $ 18,701 $ 17,885 $ 17,965            
Specialty                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses 5,265 4,898                
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 5,735                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 3,032                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2012 74                  
Liability for unallocated claim adjustment expenses for accident years presented 53                  
Total net liability for unpaid claim and claim adjustment expenses 3,159                  
Other Professional Liability and Management Liability | 2012 | Specialty                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 816 812 792 755 $ 711 $ 651 $ 573 $ 400 $ 248 $ 56
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 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 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 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 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 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 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 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 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 $ 58                  
v3.22.0.1
Claim, Claim Adjustment Expense 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, 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
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Claims Development [Line Items]                                    
Total $ 24 $ (15) $ (69)                              
Other Professional Liability and Management Liability                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 34 6 (35)                              
Total net development for accident years prior to 2012 (12) (21) (20)                              
Total unallocated claim adjustment expense development 2 0 (14)                              
Total 24 (15) (69)                              
Other Professional Liability and Management Liability | 2012                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (2) 19 (2) $ (13) $ 6 $ (38) $ (9) $ (22) $ (14)                 $ (75)
Other Professional Liability and Management Liability | 2013                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (13) (4) (13) (3) (19) (41) 32 $ 10                 $ (51)  
Other Professional Liability and Management Liability | 2014                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (4) (9) 19 4 (54) (13) $ 20                 $ (37)    
Other Professional Liability and Management Liability | 2015                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 23 6 (25) (45) (15) $ 4                 $ (52)      
Other Professional Liability and Management Liability | 2016                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (16) 3 4 0 $ (1)                 $ (10)        
Other Professional Liability and Management Liability | 2017                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (16) (22) (32) $ (2)                 $ (72)          
Other Professional Liability and Management Liability | 2018                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 37 5 $ 14                 $ 56            
Other Professional Liability and Management Liability | 2019                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 11 $ 8                 $ 19              
Other Professional Liability and Management Liability | 2020                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims $ 14                 $ 14                
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Specialty - Surety - Net Incurred Claims and Allocated Claim Adjustment Expenses) (Details) - Surety - Specialty
$ in Millions
Dec. 31, 2021
USD ($)
claim
Dec. 31, 2020
USD ($)
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 ($)
Dec. 31, 2012
USD ($)
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 765                  
IBNR 328                  
2012                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 36 $ 37 $ 38 $ 39 $ 45 $ 52 $ 70 $ 98 $ 122 $ 120
IBNR $ 1                  
Cumulative Number of Claims | claim 5,586                  
2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 82 82 83 87 91 106 115 121 $ 120  
IBNR $ 2                  
Cumulative Number of Claims | claim 5,088                  
2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 43 45 45 60 69 94 124 $ 123    
IBNR $ 1                  
Cumulative Number of Claims | claim 5,118                  
2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 53 58 63 79 104 131 $ 131      
IBNR $ 9                  
Cumulative Number of Claims | claim 5,055                  
2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 64 67 84 109 124 $ 124        
IBNR $ 10                  
Cumulative Number of Claims | claim 5,521                  
2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 71 84 103 115 $ 120          
IBNR $ 9                  
Cumulative Number of Claims | claim 5,795                  
2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 62 91 108 $ 114            
IBNR $ 19                  
Cumulative Number of Claims | claim 6,097                  
2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 98 112 $ 119              
IBNR $ 44                  
Cumulative Number of Claims | claim 5,816                  
2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 119 $ 128                
IBNR $ 104                  
Cumulative Number of Claims | claim 4,006                  
2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 137                  
IBNR $ 129                  
Cumulative Number of Claims | claim 2,592                  
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Specialty - Surety - Net Cumulative Paid Claim and Claim Adjustment Expenses) (Details) - USD ($)
$ in Millions
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
Dec. 31, 2012
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,205 $ 18,701 $ 17,885 $ 17,965            
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 5,265 4,898                
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 396                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 369                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2012 17                  
Liability for unallocated claim adjustment expenses for accident years presented 20                  
Total net liability for unpaid claim and claim adjustment expenses 406                  
Surety | Specialty | 2012                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 36 36 37 37 $ 36 $ 35 $ 35 $ 34 $ 32 $ 5
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 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 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 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 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 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 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 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 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 $ 5                  
v3.22.0.1
Claim, Claim Adjustment Expense 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, 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
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Claims Development [Line Items]                                    
Total $ (73) $ (69) $ (92)                              
Surety                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (76) (67) (79)                              
Total net development for accident years prior to 2012 3 (2) (3)                              
Total unallocated claim adjustment expense development 0 0 (10)                              
Total (73) (69) (92)                              
Surety | 2012                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (1) (1) (1) $ (6) $ (7) $ (18) $ (28) $ (24) $ 2                 $ (84)
Surety | 2013                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims 0 (1) (4) (4) (15) (9) (6) $ 1                 $ (38)  
Surety | 2014                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (2) 0 (15) (9) (25) (30) $ 1                 $ (80)    
Surety | 2015                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (5) (5) (16) (25) (27) $ 0                 $ (78)      
Surety | 2016                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (3) (17) (25) (15) $ 0                 $ (60)        
Surety | 2017                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (13) (19) (12) $ (5)                 $ (49)          
Surety | 2018                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (29) (17) $ (6)                 $ (52)            
Surety | 2019                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims (14) $ (7)                 $ (21)              
Surety | 2020                                    
Claims Development [Line Items]                                    
Cumulative Number of Claims $ (9)                 $ (9)                
v3.22.0.1
Claim, Claim Adjustment Expense 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, 2021
Dec. 31, 2020
Dec. 31, 2019
Liability for Claims and Claims Adjustment Expense [Line Items]      
Commercial $ 53 $ 33 $ (25)
General Liability 15 15 16
Workers' Compensation (82) (96) (13)
Property and Other 8 41 (18)
Total pretax (favorable) unfavorable development $ (6) $ (7) $ (40)
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Commercial - Commercial Auto - Short Duration Contracts) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses $ 19,205 $ 18,701 $ 17,885 $ 17,965
Commercial        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 8,065 $ 7,475    
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 673      
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 2,911      
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 3,850      
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 $ 631      
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Commercial - Commercial Auto - Net Incurred Claims and Allocated Claim Adjustment Expenses) (Details) - Commercial Auto - Commercial
$ in Millions
Dec. 31, 2021
USD ($)
claim
Dec. 31, 2020
USD ($)
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 ($)
Dec. 31, 2012
USD ($)
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 2,582                  
IBNR 433                  
2012                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 295 $ 296 $ 297 $ 299 $ 299 $ 307 $ 303 $ 299 $ 289 $ 275
IBNR $ 1                  
Cumulative Number of Claims | claim 46,288                  
2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 241 241 241 245 245 249 265 265 $ 246  
IBNR $ 2                  
Cumulative Number of Claims | claim 39,430                  
2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 202 201 201 205 205 212 223 $ 234    
IBNR $ 2                  
Cumulative Number of Claims | claim 33,628                  
2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 183 181 183 190 190 199 $ 201      
IBNR $ 3                  
Cumulative Number of Claims | claim 30,427                  
2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 195 190 186 186 186 $ 198        
IBNR $ 3                  
Cumulative Number of Claims | claim 30,449                  
2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 232 221 200 198 $ 199          
IBNR $ 5                  
Cumulative Number of Claims | claim 30,940                  
2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 245 227 227 $ 229            
IBNR $ 8                  
Cumulative Number of Claims | claim 34,292                  
2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 289 266 $ 257              
IBNR $ 31                  
Cumulative Number of Claims | claim 37,142                  
2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 303 $ 310                
IBNR $ 107                  
Cumulative Number of Claims | claim 28,837                  
2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 397                  
IBNR $ 271                  
Cumulative Number of Claims | claim 27,182                  
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Commercial - Commercial Auto - Net Cumulative Paid Claim and Claim Adjustment Expenses) (Details) - USD ($)
$ in Millions
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
Dec. 31, 2012
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,205 $ 18,701 $ 17,885 $ 17,965            
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 8,065 7,475                
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 1,928                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 654                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2012 5                  
Liability for unallocated claim adjustment expenses for accident years presented 14                  
Total net liability for unpaid claim and claim adjustment expenses 673                  
Commercial Auto | Commercial | 2012                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 292 291 291 290 $ 285 $ 282 $ 259 $ 220 $ 160 $ 78
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 239 239 238 234 225 200 168 135 $ 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 199 198 196 187 166 137 102 $ 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 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 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 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 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 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 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 $ 83                  
v3.22.0.1
Claim, Claim Adjustment Expense 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, 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
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Total $ 53 $ 33 $ (25)                              
Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 52 31 (17)                              
Total net development for accident years prior to 2012 1 2 (7)                              
Total unallocated claim adjustment expense development 0 0 (1)                              
Total 53 33 (25)                              
2012 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (1) (1) (2) $ 0 $ (8) $ 4 $ 4 $ 10 $ 14                 $ 20
2013 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 0 0 (4) 0 (4) (16) 0 $ 19                 $ (5)  
2014 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 1 0 (4) 0 (7) (11) $ (11)                 $ (32)    
2015 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 2 (2) (7) 0 (9) $ (2)                 $ (18)      
2016 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 5 4 0 0 $ (12)                 $ (3)        
2017 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 11 21 2 $ (1)                 $ 33          
2018 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 18 0 $ (2)                 $ 16            
2019 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 23 $ 9                 $ 32              
2020 | Commercial Auto                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims $ (7)                 $ (7)                
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Commercial - General Liability - Net Incurred Claims and Allocated Claim Adjustment Expenses) (Details) - General Liability - Commercial
$ in Millions
Dec. 31, 2021
USD ($)
claim
Dec. 31, 2020
USD ($)
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 ($)
Dec. 31, 2012
USD ($)
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 6,670                  
IBNR 2,006                  
2012                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 632 $ 632 $ 630 $ 635 $ 635 $ 619 $ 636 $ 639 $ 611 $ 587
IBNR $ 20                  
Cumulative Number of Claims | claim 35,313                  
2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 624 623 620 623 613 655 650 655 $ 650  
IBNR $ 24                  
Cumulative Number of Claims | claim 33,706                  
2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 659 659 658 635 631 654 658 $ 653    
IBNR $ 28                  
Cumulative Number of Claims | claim 28,064                  
2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 617 602 600 589 574 576 $ 581      
IBNR $ 42                  
Cumulative Number of Claims | claim 24,118                  
2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 683 673 671 667 659 $ 623        
IBNR $ 68                  
Cumulative Number of Claims | claim 24,511                  
2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 630 634 632 632 $ 632          
IBNR $ 67                  
Cumulative Number of Claims | claim 22,195                  
2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 639 646 644 $ 653            
IBNR $ 205                  
Cumulative Number of Claims | claim 19,917                  
2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 682 682 $ 680              
IBNR $ 330                  
Cumulative Number of Claims | claim 18,602                  
2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 722 $ 723                
IBNR $ 516                  
Cumulative Number of Claims | claim 13,028                  
2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 782                  
IBNR $ 706                  
Cumulative Number of Claims | claim 9,759                  
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Commercial - General Liability - Net Cumulative Paid Claim and Claim Adjustment Expenses) (Details) - USD ($)
$ in Millions
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
Dec. 31, 2012
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,205 $ 18,701 $ 17,885 $ 17,965            
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 8,065 7,475                
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 3,929                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 2,741                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2012 119                  
Liability for unallocated claim adjustment expenses for accident years presented 51                  
Total net liability for unpaid claim and claim adjustment expenses 2,911                  
General Liability | Commercial | 2012                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 602 597 579 559 $ 510 $ 454 $ 374 $ 247 $ 132 $ 28
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 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 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 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 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 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 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 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 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 $ 26                  
v3.22.0.1
Claim, Claim Adjustment Expense 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, 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
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Total $ 15 $ 15 $ 16                              
General Liability                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 14 16 21                              
Total net development for accident years prior to 2012 (1) (1) (4)                              
Total unallocated claim adjustment expense development 2 0 (1)                              
Total 15 15 16                              
General Liability | 2012                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 0 2 (5) $ 0 $ 16 $ (17) $ (3) $ 28 $ 24                 $ 45
General Liability | 2013                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 1 3 (3) 10 (42) 5 (5) $ 5                 $ (26)  
General Liability | 2014                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 0 1 23 4 (23) (4) $ 5                 $ 6    
General Liability | 2015                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 15 2 11 15 (2) $ (5)                 $ 36      
General Liability | 2016                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 10 2 4 8 $ 36                 $ 60        
General Liability | 2017                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (4) 2 0 $ 0                 $ (2)          
General Liability | 2018                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (7) 2 $ (9)                 $ (14)            
General Liability | 2019                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 0 $ 2                 $ 2              
General Liability | 2020                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims $ (1)                 $ (1)                
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Commercial - Workers' Compensation - Net Incurred Claims and Allocated Claim Adjustment Expenses) (Details) - Workers' Compensation - Commercial
$ in Millions
Dec. 31, 2021
USD ($)
claim
Dec. 31, 2020
USD ($)
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 ($)
Dec. 31, 2012
USD ($)
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 4,575                  
IBNR 1,325                  
2012                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 664 $ 663 $ 668 $ 671 $ 673 $ 678 $ 669 $ 659 $ 627 $ 601
IBNR $ 66                  
Cumulative Number of Claims | claim 42,804                  
2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 548 552 561 582 593 618 592 572 $ 537  
IBNR $ 91                  
Cumulative Number of Claims | claim 38,867                  
2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 448 439 446 450 452 479 480 $ 467    
IBNR $ 105                  
Cumulative Number of Claims | claim 33,502                  
2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 372 382 394 408 406 431 $ 422      
IBNR $ 101                  
Cumulative Number of Claims | claim 31,894                  
2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 355 366 382 396 405 $ 426        
IBNR $ 104                  
Cumulative Number of Claims | claim 31,981                  
2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 402 400 421 432 $ 440          
IBNR $ 92                  
Cumulative Number of Claims | claim 33,121                  
2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 415 428 440 $ 450            
IBNR $ 104                  
Cumulative Number of Claims | claim 34,851                  
2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 437 449 $ 452              
IBNR $ 134                  
Cumulative Number of Claims | claim 34,248                  
2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 466 $ 477                
IBNR $ 228                  
Cumulative Number of Claims | claim 29,188                  
2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 468                  
IBNR $ 300                  
Cumulative Number of Claims | claim 25,711                  
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Commercial - Workers' Compensation - Net Cumulative Paid Claim and Claim Adjustment Expenses) (Details) - USD ($)
$ in Millions
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
Dec. 31, 2012
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,205 $ 18,701 $ 17,885 $ 17,965            
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 8,065 7,475                
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 2,703                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 1,872                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2012 1,941                  
Other (14)                  
Liability for unallocated claim adjustment expenses for accident years presented 51                  
Total net liability for unpaid claim and claim adjustment expenses 3,850                  
Workers' Compensation | 2012 | Commercial                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 541 538 536 524 $ 509 $ 470 $ 416 $ 342 $ 232 $ 87
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 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 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 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 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 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 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 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 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 $ 67                  
v3.22.0.1
Claim, Claim Adjustment Expense 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, 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
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Total $ (82) $ (96) $ (13)                              
Workers' Compensation                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (49) (85) (77)                              
Adjustment for development on a discounted basis 2 2 3                              
Total net development for accident years prior to 2012 (35) (13) 38                              
Total unallocated claim adjustment expense development 0 0 23                              
Total (82) (96) (13)                              
Workers' Compensation | 2012                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 1 (5) (3) $ (2) $ (5) $ 9 $ 10 $ 32 $ 26                 $ 63
Workers' Compensation | 2013                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (4) (9) (21) (11) (25) 26 20 $ 35                 $ 11  
Workers' Compensation | 2014                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 9 (7) (4) (2) (27) (1) $ 13                 $ (19)    
Workers' Compensation | 2015                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (10) (12) (14) 2 (25) $ 9                 $ (50)      
Workers' Compensation | 2016                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (11) (16) (14) (9) $ (21)                 $ (71)        
Workers' Compensation | 2017                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 2 (21) (11) $ (8)                 $ (38)          
Workers' Compensation | 2018                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (13) (12) $ (10)                 $ (35)            
Workers' Compensation | 2019                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (12) $ (3)                 $ (15)              
Workers' Compensation | 2020                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims $ (11)                 $ (11)                
v3.22.0.1
Claim, Claim Adjustment Expense 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, 2021
Dec. 31, 2020
Dec. 31, 2019
Liability for Claims and Claims Adjustment Expense [Line Items]      
Commercial $ (35) $ (2) $ (8)
Specialty 36 3 37
Other 1 (3) (8)
Total pretax (favorable) unfavorable development $ 2 $ (2) $ 21
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (International - Short Duration Contracts) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses $ 19,205 $ 18,701 $ 17,885 $ 17,965
International        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses 1,940 $ 1,822    
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 1,400      
Hardy | International        
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]        
Total net liability for unpaid claim and claim adjustment expenses $ 540      
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (International - Excluding Hardy - Net Incurred Claims and Allocated Claim Adjustment Expenses) (Details) - Excluding Hardy - International
$ in Millions
Dec. 31, 2021
USD ($)
claim
Dec. 31, 2020
USD ($)
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 ($)
Dec. 31, 2012
USD ($)
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 3,371                  
IBNR 845                  
2012                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 250 $ 236 $ 241 $ 247 $ 254 $ 261 $ 262 $ 269 $ 285 $ 278
IBNR $ 16                  
Cumulative Number of Claims | claim 24,998                  
2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 251 247 251 260 269 273 293 301 $ 285  
IBNR $ 12                  
Cumulative Number of Claims | claim 23,967                  
2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 294 301 300 283 291 303 303 $ 288    
IBNR $ 16                  
Cumulative Number of Claims | claim 24,946                  
2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 297 294 292 298 316 317 $ 301      
IBNR $ 27                  
Cumulative Number of Claims | claim 23,357                  
2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 302 287 297 300 315 $ 296        
IBNR $ 37                  
Cumulative Number of Claims | claim 17,776                  
2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 388 393 401 378 $ 312          
IBNR $ 84                  
Cumulative Number of Claims | claim 18,470                  
2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 406 407 402 $ 384            
IBNR $ 81                  
Cumulative Number of Claims | claim 20,726                  
2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 368 371 $ 357              
IBNR $ 91                  
Cumulative Number of Claims | claim 17,974                  
2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 389 $ 398                
IBNR $ 184                  
Cumulative Number of Claims | claim 13,909                  
2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 426                  
IBNR $ 297                  
Cumulative Number of Claims | claim 10,401                  
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (International - Excluding Hardy - Net Cumulative Paid Claim and Claim Adjustment Expenses) (Details) - USD ($)
$ in Millions
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
Dec. 31, 2012
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,205 $ 18,701 $ 17,885 $ 17,965            
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 1,940 1,822                
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 2,053                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 1,318                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2012 47                  
Liability for unallocated claim adjustment expenses for accident years presented 35                  
Total net liability for unpaid claim and claim adjustment expenses 1,400                  
Excluding Hardy | 2012 | International                    
Short-Duration Insurance Contracts, Net Cumulative Paid Claim and Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 218 215 213 210 $ 200 $ 188 $ 172 $ 151 $ 117 $ 46
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 224 218 206 186 176 161 144 116 $ 51  
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 250 245 211 190 173 154 126 $ 54    
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 239 228 213 189 168 137 $ 58      
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 223 200 188 164 136 $ 68        
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 247 223 193 152 $ 67          
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 252 221 173 $ 94            
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 209 171 $ 76              
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 133 $ 62                
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 $ 58                  
v3.22.0.1
Claim, Claim Adjustment Expense 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, 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
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
2012                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims $ 14 $ (5) $ (6) $ (7) $ (7) $ (1) $ (7) $ (16) $ 7                 $ (28)
2013                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 4 (4) (9) (9) (4) (20) (8) $ 16                 $ (34)  
2014                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (7) 1 17 (8) (12) 0 $ 15                 $ 6    
2015                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 3 2 (6) (18) (1) $ 16                 $ (4)      
2016                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 15 (10) (3) (15) $ 19                 $ 6        
2017                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (5) (8) 23 $ 66                 $ 76          
2018                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (1) 5 $ 18                 $ 22            
2019                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (3) $ 14                 $ 11              
2020                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims $ (9)                 $ (9)                
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (International - Hardy - Net Incurred Claims and Allocated Claim Adjustment Expenses) (Details) - International
$ in Millions
Dec. 31, 2021
USD ($)
claim
Dec. 31, 2020
USD ($)
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 ($)
Dec. 31, 2012
USD ($)
Hardy                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 2,008                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 529                  
IBNR 297                  
Hardy | 2012                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Net Claim and Allocated Claim Adjustment Expense Reserves at Acquisition                   $ 34
Incurred claims and allocated claim adjustment expense, net 114 $ 113 $ 115 $ 116 $ 114 $ 113 $ 120 $ 112 $ 105 71
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented                   105
IBNR $ (3)                  
Cumulative Number of Claims | claim 7,045,000,000                  
Hardy | 2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 144 146 146 145 142 140 139 147 132  
IBNR $ 7                  
Cumulative Number of Claims | claim 7,893,000,000                  
Hardy | 2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 169 172 173 172 171 178 184 186    
IBNR $ (6)                  
Cumulative Number of Claims | claim 8,493,000,000                  
Hardy | 2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 181 180 178 180 179 181 191      
IBNR $ (1)                  
Cumulative Number of Claims | claim 9,669,000,000                  
Hardy | 2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 222 228 226 238 249 231        
IBNR $ (1)                  
Cumulative Number of Claims | claim 10,746,000,000                  
Hardy | 2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 253 246 244 256 246          
IBNR $ 8                  
Cumulative Number of Claims | claim 13,029,000,000                  
Hardy | 2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 316 310 306 275            
IBNR $ 36                  
Cumulative Number of Claims | claim 14,868,000,000                  
Hardy | 2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 223 228 224              
IBNR $ 42                  
Cumulative Number of Claims | claim 10,891,000,000                  
Hardy | 2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 205 215                
IBNR $ 87                  
Cumulative Number of Claims | claim 5,963,000,000                  
Hardy | 2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 181                  
IBNR $ 128                  
Cumulative Number of Claims | claim 2,244,000,000                  
Excluding Hardy                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 3,371                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 1,318                  
IBNR 845                  
Excluding Hardy | 2012                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net 250 236 241 247 254 261 262 269 285 $ 278
IBNR $ 16                  
Cumulative Number of Claims | claim 24,998                  
Excluding Hardy | 2013                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 251 247 251 260 269 273 293 301 $ 285  
IBNR $ 12                  
Cumulative Number of Claims | claim 23,967                  
Excluding Hardy | 2014                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 294 301 300 283 291 303 303 $ 288    
IBNR $ 16                  
Cumulative Number of Claims | claim 24,946                  
Excluding Hardy | 2015                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 297 294 292 298 316 317 $ 301      
IBNR $ 27                  
Cumulative Number of Claims | claim 23,357                  
Excluding Hardy | 2016                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 302 287 297 300 315 $ 296        
IBNR $ 37                  
Cumulative Number of Claims | claim 17,776                  
Excluding Hardy | 2017                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 388 393 401 378 $ 312          
IBNR $ 84                  
Cumulative Number of Claims | claim 18,470                  
Excluding Hardy | 2018                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 406 407 402 $ 384            
IBNR $ 81                  
Cumulative Number of Claims | claim 20,726                  
Excluding Hardy | 2019                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 368 371 $ 357              
IBNR $ 91                  
Cumulative Number of Claims | claim 17,974                  
Excluding Hardy | 2020                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 389 $ 398                
IBNR $ 184                  
Cumulative Number of Claims | claim 13,909                  
Excluding Hardy | 2021                    
Short-duration Insurance Contracts, Net Incurred Claim and Claim Adjustment Expenses [Line Items]                    
Incurred claims and allocated claim adjustment expense, net $ 426                  
IBNR $ 297                  
Cumulative Number of Claims | claim 10,401                  
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (International - Hardy - Net Cumulative Paid Claim and Claim Adjustment Expenses) (Details) - USD ($)
$ in Millions
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
Dec. 31, 2012
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses $ 19,205 $ 18,701 $ 17,885 $ 17,965            
International                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Total net liability for unpaid claim and claim adjustment expenses 1,940 1,822                
Hardy | International                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 1,479                  
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented 529                  
Net liability for unpaid claim and claim adjustment expenses for accident years prior to 2012 3                  
Liability for unallocated claim adjustment expenses for accident years presented 8                  
Total net liability for unpaid claim and claim adjustment expenses 540                  
Hardy | International | 2012                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 115 112 111 110 $ 109 $ 107 $ 109 $ 100 $ 80 $ 14
Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented                   $ 105
Hardy | International | 2013                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 141 140 139 135 132 128 122 102 $ 38  
Hardy | International | 2014                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 166 165 163 157 152 142 124 $ 56    
Hardy | International | 2015                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 164 166 158 146 130 99 $ 30      
Hardy | International | 2016                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 208 196 183 174 146 $ 64        
Hardy | International | 2017                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 215 207 185 152 $ 53          
Hardy | International | 2018                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 236 205 176 $ 55            
Hardy | International | 2019                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 142 104 $ 44              
Hardy | International | 2020                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net 79 $ 28                
Hardy | International | 2021                    
Short Duration Contracts Net Cumulative Paid Claim Adjustment Expenses [Line Items]                    
Cumulative paid claims and allocated claim adjustment expense, net $ 13                  
v3.22.0.1
Claim, Claim Adjustment Expense 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, 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
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2021
2012                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims $ 1 $ (2) $ (1) $ 2 $ 1 $ (7) $ 8 $ 7 $ 0                 $ 9
2013                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (2) 0 1 3 2 1 (8) $ 15                 $ 12  
2014                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (3) (1) 1 1 (7) (6) $ (2)                 $ (17)    
2015                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 1 2 (2) 1 (2) $ (10)                 $ (10)      
2016                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (6) 2 (12) (11) $ 18                 $ (9)        
2017                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 7 2 (12) $ 10                 $ 7          
2018                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims 6 4 $ 31                 $ 41            
2019                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims (5) $ 4                 $ (1)              
2020                                    
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]                                    
Cumulative Number of Claims $ (10)                 $ (10)                
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Historical Claims Duration) (Details)
Dec. 31, 2021
Medical Professional Liability | Specialty  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 3.60%
Year 2 18.30%
Year 3 23.70%
Year 4 18.20%
Year 5 12.00%
Year 6 8.30%
Year 7 5.10%
Year 8 2.80%
Year 9 0.70%
Year 10 1.00%
Other Professional Liability and Management Liability | Specialty  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 6.70%
Year 2 21.90%
Year 3 21.10%
Year 4 16.70%
Year 5 9.90%
Year 6 6.40%
Year 7 4.30%
Year 8 3.50%
Year 9 1.70%
Year 10 0.50%
Surety | Specialty  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 14.10%
Year 2 48.70%
Year 3 18.90%
Year 4 2.60%
Year 5 1.10%
Year 6 1.30%
Year 7 0.00%
Year 8 0.40%
Year 9 (0.80%)
Year 10 0.00%
Commercial Auto | Commercial  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 26.70%
Year 2 23.20%
Year 3 18.00%
Year 4 13.60%
Year 5 10.10%
Year 6 3.20%
Year 7 1.50%
Year 8 0.40%
Year 9 0.00%
Year 10 0.30%
General Liability | Commercial  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 4.10%
Year 2 14.10%
Year 3 18.00%
Year 4 19.00%
Year 5 13.50%
Year 6 8.70%
Year 7 5.60%
Year 8 4.10%
Year 9 2.20%
Year 10 0.80%
Workers' Compensation | Commercial  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 14.70%
Year 2 21.70%
Year 3 13.90%
Year 4 9.50%
Year 5 6.40%
Year 6 2.70%
Year 7 1.10%
Year 8 1.50%
Year 9 0.40%
Year 10 0.50%
Excluding Hardy | International  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 19.00%
Year 2 23.70%
Year 3 10.80%
Year 4 7.40%
Year 5 6.10%
Year 6 5.70%
Year 7 6.80%
Year 8 2.60%
Year 9 1.60%
Year 10 1.20%
Hardy | International  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Year 1 20.40%
Year 2 36.10%
Year 3 13.40%
Year 4 6.90%
Year 5 4.40%
Year 6 3.90%
Year 7 1.00%
Year 8 0.60%
Year 9 0.70%
v3.22.0.1
Claim, Claim Adjustment Expense 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, 2021
Dec. 31, 2020
Dec. 31, 2019
Liability for Claims and Claims Adjustment Expense [Line Items]      
Net A&EP adverse development before consideration of LPT $ 143 $ 125 $ 150
Provision for uncollectible third-party reinsurance on A&EP (5) (25) (25)
Total additional amounts ceded under LPT 138 100 125
Retroactive reinsurance benefit recognized (107) (94) (107)
Pretax impact of deferred retroactive reinsurance $ 31 $ 6 $ 18
v3.22.0.1
Claim, Claim Adjustment Expense and Future Policy Benefit Reserves (Life & Group Policyholder Reserves) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2021
Liability for Claims and Claims Adjustment Expense [Abstract]        
Liability for unpaid claims and claims adjustment expense, long term care policies, period increase (decrease) $ (40) $ (37) $ (56)  
Liability for unpaid claims and claims adjustment expense structured settlement obligations period increase (decrease) 2 46    
Liability for future policy benefits, gross premium valuation, pretax margin $ 72     $ 72
Premium deficiency and future policy benefit   $ 74 $ 216  
v3.22.0.1
Legal Proceedings, Contingencies and Guarantees (Narrative) (Details)
$ in Billions
Dec. 31, 2021
USD ($)
Guarantee Obligations  
Legal Proceedings, Commitments and Contingencies, and Guarantees [Line Items]  
Guarantor obligations, maximum exposure, undiscounted $ 1.6
v3.22.0.1
Reinsurance (Components of Reinsurance Receivables) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Reinsurance receivables related to insurance reserves        
Ceded claim and claim adjustment expenses $ 4,969 $ 4,005 $ 3,835 $ 4,019
Ceded future policy benefits 288 263    
Reinsurance receivables related to paid losses 227 210    
Reinsurance receivables 5,484 4,478    
Allowance for uncollectible reinsurance (21) (21)    
Reinsurance receivables, net of allowance for uncollectible reinsurance $ 5,463 $ 4,457    
v3.22.0.1
Reinsurance (Voluntary Reinsurance) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Effects of Reinsurance [Line Items]  
Total voluntary reinsurance outstanding balance $ 4,802
A- to A++  
Effects of Reinsurance [Line Items]  
Total voluntary reinsurance outstanding balance 3,812
B- to B++  
Effects of Reinsurance [Line Items]  
Total voluntary reinsurance outstanding balance 987
Insolvent  
Effects of Reinsurance [Line Items]  
Total voluntary reinsurance outstanding balance $ 3
v3.22.0.1
Reinsurance (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Feb. 05, 2021
Ceded Credit Risk [Line Items]        
Funds held under reinsurance agreements, liability $ 4,000 $ 3,300   $ 690
Largest recoverable from single reinsurer 5,463 4,457    
Reinsurance recoveries reported in insurance claims and policyholders' benefits reported on the Consolidated Statement of Operations 3,058 3,158 $ 2,733  
Subsidiaries of Berkshire Hathaway Group        
Ceded Credit Risk [Line Items]        
Largest recoverable from single reinsurer 1,800      
Cavello Bay Reinsurance Limited        
Ceded Credit Risk [Line Items]        
Largest recoverable from single reinsurer 612      
Gateway Rivers Insurance Company        
Ceded Credit Risk [Line Items]        
Largest recoverable from single reinsurer 425      
Significant Captive Program        
Ceded Credit Risk [Line Items]        
Direct and ceded earned premiums 3,638 3,543 3,578  
Reinsurance recoveries reported in insurance claims and policyholders' benefits reported on the Consolidated Statement of Operations $ 2,003 $ 2,375 $ 2,080  
v3.22.0.1
Reinsurance (Components of Earned Premiums) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Premiums Earned, Net [Abstract]      
Direct $ 12,997 $ 12,001 $ 11,491
Assumed 288 288 338
Ceded 5,110 4,640 4,401
Net 8,175 7,649 7,428
Property and casualty      
Premiums Earned, Net [Abstract]      
Direct 12,554 11,547 11,021
Assumed 240 238 288
Ceded 5,110 4,640 4,401
Net 7,684 7,145 6,908
Long term care      
Premiums Earned, Net [Abstract]      
Direct 443 454 470
Assumed 48 50 50
Ceded 0 0 0
Net $ 491 $ 504 $ 520
Percentage of assumed premiums earned to net premiums earned      
Premiums Earned, Net [Abstract]      
Assumed/ Net % 3.50% 3.80% 4.60%
Percentage of assumed premiums earned to net premiums earned | Property and casualty      
Premiums Earned, Net [Abstract]      
Assumed/ Net % 3.10% 3.30% 4.20%
Percentage of assumed premiums earned to net premiums earned | Long term care      
Premiums Earned, Net [Abstract]      
Assumed/ Net % 9.80% 9.90% 9.60%
v3.22.0.1
Reinsurance (Components of Written Premiums) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Premiums Written, Net [Abstract]      
Direct $ 13,587 $ 12,612 $ 11,894
Assumed 303 279 331
Ceded 5,485 4,832 4,569
Net 8,405 8,059 7,656
Property and casualty      
Premiums Written, Net [Abstract]      
Direct 13,150 12,168 11,421
Assumed 255 229 281
Ceded 5,485 4,832 4,569
Net 7,920 7,565 7,133
Long term care      
Premiums Written, Net [Abstract]      
Direct 437 444 473
Assumed 48 50 50
Ceded 0 0 0
Net $ 485 $ 494 $ 523
Percentage of assumed premiums written to net premiums written      
Premiums Written, Net [Abstract]      
Assumed/ Net % 3.60% 3.50% 4.30%
Percentage of assumed premiums written to net premiums written | Property and casualty      
Premiums Written, Net [Abstract]      
Assumed/ Net % 3.20% 3.00% 3.90%
Percentage of assumed premiums written to net premiums written | Long term care      
Premiums Written, Net [Abstract]      
Assumed/ Net % 9.90% 10.10% 9.60%
v3.22.0.1
Debt (Schedule of debt instruments) (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Long term debt $ 2,779,000,000 $ 2,776,000,000
Total $ 2,779,000,000 2,776,000,000
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 $ 549,000,000 548,000,000
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 $ 497,000,000 496,000,000
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 $ 496,000,000 496,000,000
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 $ 495,000,000 495,000,000
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  
Long term debt $ 243,000,000 $ 242,000,000
v3.22.0.1
Debt (Narrative) (Details)
12 Months Ended
Dec. 31, 2019
USD ($)
extensionTerm
Dec. 31, 2021
USD ($)
Dec. 31, 2020
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
v3.22.0.1
Debt (Maturity of debt) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Debt Disclosure [Abstract]    
2022 $ 0  
2023 243  
2024 550  
2025 0  
2026 500  
Thereafter 1,500  
Less: discount (14)  
Total $ 2,779 $ 2,776
v3.22.0.1
Benefit Plans (Funded Status) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Changes in benefit obligation:      
Actuarial (gain) loss $ (84) $ 205  
Pension Benefits      
Changes in benefit obligation:      
Balance at beginning of period 2,769 2,661  
Interest cost 62 80 $ 100
Participants' contributions 0 0  
Actuarial (gain) loss (84) 205  
Benefits paid (182) (173)  
Foreign currency translation and other (2) 3  
Settlements (2) (7)  
Balance at end of period 2,561 2,769 2,661
Change in plan assets:      
Balance beginning of period 2,420 2,285  
Actual return on plan assets 332 295  
Company contributions 10 16  
Participants' contributions 0 0  
Benefits paid (182) (173)  
Foreign currency translation and other (1) 4  
Settlements (2) (7)  
Balance end of period 2,577 2,420 2,285
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]      
Funded status 16 (349)  
Amounts recognized on the Consolidated Balance Sheets as of December 31:      
Other assets 77 2  
Other liabilities (61) (351)  
Net amount recognized 16 (349)  
Amounts recognized in Accumulated other comprehensive income, not yet recognized in net periodic cost (benefit):      
Net actuarial (gain) loss 763 1,073  
Net amount recognized 763 1,073  
Postretirement Benefits      
Changes in benefit obligation:      
Balance at beginning of period 7 8  
Interest cost 0 0  
Participants' contributions 3 2  
Actuarial (gain) loss 1 2  
Benefits paid (5) (5)  
Foreign currency translation and other 0 0  
Settlements 0 0  
Balance at end of period 6 7 8
Change in plan assets:      
Balance beginning of period 0 0  
Actual return on plan assets 0 0  
Company contributions 2 3  
Participants' contributions 3 2  
Benefits paid (5) (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 (6) (7)  
Amounts recognized on the Consolidated Balance Sheets as of December 31:      
Other assets 0 0  
Other liabilities (6) (7)  
Net amount recognized (6) (7)  
Amounts recognized in Accumulated other comprehensive income, not yet recognized in net periodic cost (benefit):      
Net actuarial (gain) loss 1 0  
Net amount recognized $ 1 $ 0  
v3.22.0.1
Benefit Plans (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Actuarial (gain) loss $ (84) $ 205  
Defined benefit plan, plan with accumulated benefit obligation in excess of plan assets, accumulated benefit obligation 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 $ 160    
Percentage of limited partnerships employing hedge fund strategies focused on fixed income and equity investments 32.00% 51.00%  
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 $ 65 $ 70 $ 71
Pension Benefits      
Defined benefit plan, accumulated benefit obligation 2,561 2,769  
Actuarial (gain) loss $ (84) $ 205  
Percentage of limited partnerships employing hedge fund strategies focused on fixed income and equity investments 65.00% 75.00%  
Limited partnership equity related hedge fund strategy plan assets 76.00%    
Limited partnership hedge fund multi strategy plan assets 19.00%    
Limited partnership hedge fund strategy distressed investments plan assets 5.00%    
Defined benefit plan, expected future employer contributions, next fiscal year $ 5    
Postretirement Benefits      
Actuarial (gain) loss $ 1 $ 2  
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 40.00%    
Maximum      
Defined benefit plan, plan assets, target allocation, percentage 60.00%    
v3.22.0.1
Benefit Plans (Components of Net Periodic Cost (Benefit)) (Details) - Pension Benefits - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]      
Interest cost on projected benefit obligation $ 62 $ 80 $ 100
Expected return on plan assets (154) (155) (142)
Amortization of net actuarial (gain) loss 46 45 39
Settlement loss 1 3 0
Total net periodic pension cost (benefit) $ (45) $ (27) $ (3)
v3.22.0.1
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, 2021
Dec. 31, 2020
Dec. 31, 2019
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 $ (45) $ (27) $ (3)
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 (13) (8) (1)
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 $ (32) $ (19) $ (2)
v3.22.0.1
Benefit Plans (Schedule of Amounts Recognized in Other Comprehensive Income) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Retirement Benefits [Abstract]      
Amounts arising during the period $ 262 $ (67) $ (112)
Settlement 1 3 0
Reclassification adjustment relating to prior service credit 0 0 0
Reclassification adjustment relating to actuarial loss 46 45 39
Total increase (decrease) in Other comprehensive income $ 309 $ (19) $ (73)
v3.22.0.1
Benefit Plans (Actuarial Assumptions for Benefit Obligations) (Details)
Dec. 31, 2021
Dec. 31, 2020
Pension Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 2.75% 2.35%
Interest crediting rate 3.00% 3.00%
Postretirement Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 2.25% 1.60%
v3.22.0.1
Benefit Plans (Actuarial Assumptions for Net Cost or Benefit) (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 2.35% 3.15% 4.25%
Expected long term rate of return 6.75% 7.25% 7.50%
Interest crediting rate 3.00% 5.00% 5.00%
Postretirement Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 1.60% 2.30% 3.55%
v3.22.0.1
Benefit Plans (Fair Value of Plan Assets Measured on a Recurring Basis) (Details) - Pension Benefits - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 2,577 $ 2,420 $ 2,285
Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,577 2,420  
Total | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,719 1,664  
Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 777 699  
Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 934 956  
Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 9  
Fair Value Measured at Net Asset Value Per Share | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 838 756  
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 20    
Total fixed maturity securities trading | Total | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 793 782  
Total fixed maturity securities trading | Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Total fixed maturity securities trading | Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 785 773  
Total fixed maturity securities trading | Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 9  
Corporate and other bonds | Total | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 653 652  
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 645 643  
Corporate and other bonds | Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 9  
States, municipalities and political subdivisions | Total | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 30 32  
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 30 32  
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 110 98  
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 110 98  
Asset-backed | Level 3 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity securities | Total | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 873 803  
Equity securities | Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 732 666  
Equity securities | Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 141 137  
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 45 58  
Short term investments | Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 45 20  
Short term investments | Level 2 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 38  
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 8 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 8 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 13  
Cash | Level 1 | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 13  
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  
v3.22.0.1
Benefit Plans (Estimated Future Minimum Benefit Payments to Participants) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Pension Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2022 $ 182
2023 179
2024 177
2025 175
2026 173
2027-2031 798
Postretirement Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2022 1
2023 1
2024 1
2025 0
2026 0
2027-2031 $ 1
v3.22.0.1
Stock-Based Compensation (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
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) 5,600,000    
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 $ 32 $ 37 $ 34
Tax benefit from compensation expense 6 6 8
Compensation cost not yet recognized $ 41    
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 $ 36 $ 35 $ 31
Weighted average grant date fair value of awards granted (in usd per share) $ 45.82 $ 34.36 $ 43.86
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    
v3.22.0.1
Stock-Based Compensation (Restricted shares, performance-based restricted share units and performance share unit activity) (Details) - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Number of Awards      
Balance as of beginning of period (in shares) 2,439,141    
Awards granted (in shares) 1,044,772    
Awards vested (in shares) (789,495)    
Awards forfeited, canceled or expired (in shares) (355,881)    
Performance-based adjustment (in shares) 37,061    
Balance as of end of period (in shares) 2,375,598 2,439,141  
Weighted Average Grant Date Fair Value      
Balance as of January 1, 2020 (in dollars per share) $ 40.56    
Awards granted (in dollars per share) 45.82 $ 34.36 $ 43.86
Awards vested (in dollars per share) 46.13    
Awards forfeited, canceled or expired (in dollars per share) 40.19    
Performance-based adjustment (in dollars per share) 43.70    
Balance as of December 31, 2020 (in dollars per share) $ 41.21 $ 40.56  
v3.22.0.1
Other Intangible Assets (Summary of Other Intangible Assets) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Schedule of Other Intangible Assets [Abstract]    
Finite-lived intangible assets: $ 18 $ 18
Indefinite-lived intangible assets: 63 64
Total other intangible assets 81 82
Accumulated Amortization 14 13
Syndicate capacity    
Schedule of Other Intangible Assets [Abstract]    
Indefinite-lived intangible assets: 47 48
Agency force    
Schedule of Other Intangible Assets [Abstract]    
Indefinite-lived intangible assets: $ 16 16
Trade name    
Schedule of Other Intangible Assets [Abstract]    
Economic Useful Life 8 years  
Finite-lived intangible assets: $ 7 7
Accumulated Amortization $ 7 7
Distribution channel    
Schedule of Other Intangible Assets [Abstract]    
Economic Useful Life 15 years  
Finite-lived intangible assets: $ 11 11
Accumulated Amortization $ 7 $ 6
v3.22.0.1
Other Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]      
2022 $ 1    
2023 1    
2024 1    
2025 1    
2026 1    
Other Intangible Assets | International      
Finite-Lived Intangible Assets [Line Items]      
Amortization expense included in other operating expenses $ 1 $ 1 $ 1
v3.22.0.1
Leases (Narrative) (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]      
Lease expense $ 57 $ 57 $ 55
Operating lease, cost 38 38 37
Variable lease, cost 19 19 18
Operating lease, payments 44 41 34
Right-of-use asset obtained in exchange for operating lease liability $ 11 $ 6 $ 12
v3.22.0.1
Leases (Assets and Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
Operating lease ROU assets $ 175 $ 199
Operating lease liabilities $ 248 $ 279
v3.22.0.1
Leases (Maturities) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
2022 $ 42  
2023 37  
2024 30  
2025 25  
2026 22  
Thereafter 141  
Total lease payments 297  
Less: Discount (49)  
Total operating lease liabilities $ 248 $ 279
v3.22.0.1
Leases (Lease Term and Discount Rate) (Details)
Dec. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
Weighted average remaining lease term 9 years 9 months 18 days 10 years 3 months 18 days
Weighted average discount rate 3.40% 3.40%
v3.22.0.1
Stockholders' Equity and Statutory Accounting Practices (Narrative) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Stockholders' Equity and Statutory Accounting Practices [Abstract]    
Increase in statutory capital and surplus due to prescribed practice $ 67 $ 91
Statutory amount available for dividend payment before consideration of statutory dividends paid in the preceding twelve months 1,201  
Dividends paid in the preceding twelve months $ 880  
Capital required for capital adequacy to risk weighted assets 2.64 2.66
v3.22.0.1
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, 2021
Dec. 31, 2020
Dec. 31, 2019
Statutory Accounting Practices [Line Items]      
Statutory Capital and Surplus $ 11,321 $ 10,708  
Statutory Net Income (Loss) $ 1,253 $ 800 $ 1,062
v3.22.0.1
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, 2021
Dec. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Total stockholder's equity at beginning of period $ 12,707 $ 12,215
Other comprehensive income (loss) before reclassifications (444) 714
Amounts reclassified from accumulated other comprehensive income (loss) net of tax 39 (38)
Other comprehensive income (loss) after tax (expense) benefit (483) 752
Total stockholder's equity at end of period 12,809 12,707
Reclassification from AOCI, tax (10) 10
Tax (expense) benefit on other comprehensive income (loss) 124 (185)
Accumulated other comprehensive income (loss)    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Total stockholder's equity at beginning of period 803 51
Total stockholder's equity at end of period 320 803
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 0 0
Other comprehensive income (loss) before reclassifications   (43)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax   (43)
Other comprehensive income (loss) after tax (expense) benefit   0
Total stockholder's equity at end of period   0
Net unrealized gains (losses) on investments with an allowance for credit losses | Net unrealized gains (losses) on investments with an allowance for credit losses    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Reclassification from AOCI, tax   12
Tax (expense) benefit on other comprehensive income (loss)   0
Net unrealized gains (losses) on investments    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Total stockholder's equity at beginning of period 1,745 1,025
Other comprehensive income (loss) before reclassifications   763
Amounts reclassified from accumulated other comprehensive income (loss) net of tax   43
Other comprehensive income (loss) after tax (expense) benefit   720
Total stockholder's equity at end of period   1,745
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 0  
Other comprehensive income (loss) before reclassifications (7)  
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (5)  
Other comprehensive income (loss) after tax (expense) benefit (2)  
Total stockholder's equity at end of period (2) 0
Reclassification from AOCI, tax 1  
Tax (expense) benefit on other comprehensive income (loss) 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 1,745  
Other comprehensive income (loss) before reclassifications (625)  
Amounts reclassified from accumulated other comprehensive income (loss) net of tax 81  
Other comprehensive income (loss) after tax (expense) benefit (706)  
Total stockholder's equity at end of period 1,039 1,745
Reclassification from AOCI, tax (21) (12)
Tax (expense) benefit on other comprehensive income (loss) 188 (189)
Pension and postretirement benefits    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Total stockholder's equity at beginning of period (848) (833)
Other comprehensive income (loss) before reclassifications 207 (53)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (37) (38)
Other comprehensive income (loss) after tax (expense) benefit 244 (15)
Total stockholder's equity at end of period (604) (848)
Reclassification from AOCI, tax 10 10
Tax (expense) benefit on other comprehensive income (loss) (65) 4
Cumulative foreign currency translation adjustment    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Total stockholder's equity at beginning of period (94) (141)
Other comprehensive income (loss) before reclassifications (19) 47
Amounts reclassified from accumulated other comprehensive income (loss) net of tax 0 0
Other comprehensive income (loss) after tax (expense) benefit (19) 47
Total stockholder's equity at end of period (113) (94)
Reclassification from AOCI, tax 0 0
Tax (expense) benefit on other comprehensive income (loss) $ 0 $ 0
v3.22.0.1
Business Segments (Narrative) (Details) - segment
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]      
Percentage of direct foreign written premiums 10.00% 9.00% 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    
v3.22.0.1
Business Segments (Income Statement Information) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]      
Net written premiums $ 8,405 $ 8,059 $ 7,656
Operating revenues      
Net earned premiums 8,175 7,649 7,428
Net investment income 2,159 1,935 2,118
Non-insurance warranty revenue 1,430 1,252 1,161
Other revenues 24 26 31
Total operating revenues 11,788 10,862 10,738
Claims, Benefits and Expenses      
Net incurred claims and benefits 6,327 6,149 5,783
Policyholders’ dividends 22 21 23
Amortization of deferred acquisition costs 1,443 1,410 1,383
Non-insurance warranty expense 1,328 1,159 1,082
Other insurance related expenses 1,062 1,028 1,038
Other expenses 242 220 235
Total claims, benefits and expenses 10,424 9,987 9,544
Core income (loss) before income tax 1,364 875 1,194
Income tax (expense) benefit on core income (loss) (258) (140) (215)
Core income (loss)  1,106 735 979
Net investment gains (losses) 120 (54) 29
Income tax (expense) benefit on net investment gains (losses) (24) 9 (8)
Net investment gains (losses), after tax 96 (45) 21
Net income (loss) 1,202 690 1,000
Operating Segments | Specialty      
Segment Reporting Information [Line Items]      
Net written premiums 3,225 3,040 2,848
Operating revenues      
Net earned premiums 3,076 2,883 2,773
Net investment income 497 449 556
Non-insurance warranty revenue 1,430 1,252 1,161
Other revenues 1 1 1
Total operating revenues 5,004 4,585 4,491
Claims, Benefits and Expenses      
Net incurred claims and benefits 1,787 1,792 1,595
Policyholders’ dividends 3 3 5
Amortization of deferred acquisition costs 643 621 610
Non-insurance warranty expense 1,328 1,159 1,082
Other insurance related expenses 296 280 292
Other expenses 47 50 48
Total claims, benefits and expenses 4,104 3,905 3,632
Core income (loss) before income tax 900 680 859
Income tax (expense) benefit on core income (loss) (196) (145) (188)
Core income (loss)  704 535 671
Operating Segments | Commercial      
Segment Reporting Information [Line Items]      
Net written premiums 3,595 3,565 3,315
Operating revenues      
Net earned premiums 3,552 3,323 3,162
Net investment income 624 513 605
Non-insurance warranty revenue 0 0 0
Other revenues 23 25 29
Total operating revenues 4,199 3,861 3,796
Claims, Benefits and Expenses      
Net incurred claims and benefits 2,540 2,375 2,086
Policyholders’ dividends 19 18 18
Amortization of deferred acquisition costs 594 592 537
Non-insurance warranty expense 0 0 0
Other insurance related expenses 511 506 505
Other expenses 38 34 32
Total claims, benefits and expenses 3,702 3,525 3,178
Core income (loss) before income tax 497 336 618
Income tax (expense) benefit on core income (loss) (103) (69) (138)
Core income (loss)  394 267 480
Operating Segments | International      
Segment Reporting Information [Line Items]      
Net written premiums 1,101 961 971
Operating revenues      
Net earned premiums 1,057 940 974
Net investment income 57 58 63
Non-insurance warranty revenue 0 0 0
Other revenues 0 0 0
Total operating revenues 1,114 998 1,037
Claims, Benefits and Expenses      
Net incurred claims and benefits 652 629 624
Policyholders’ dividends 0 0 0
Amortization of deferred acquisition costs 206 197 236
Non-insurance warranty expense 0 0 0
Other insurance related expenses 144 136 130
Other expenses (2) (7) 8
Total claims, benefits and expenses 1,000 955 998
Core income (loss) before income tax 114 43 39
Income tax (expense) benefit on core income (loss) (28) (5) (9)
Core income (loss)  86 38 30
Operating Segments | Life & Group      
Segment Reporting Information [Line Items]      
Net written premiums 485 494 523
Operating revenues      
Net earned premiums 491 504 520
Net investment income 966 851 820
Non-insurance warranty revenue 0 0 0
Other revenues 0 0 0
Total operating revenues 1,457 1,355 1,340
Claims, Benefits and Expenses      
Net incurred claims and benefits 1,239 1,286 1,416
Policyholders’ dividends 0 0 0
Amortization of deferred acquisition costs 0 0 0
Non-insurance warranty expense 0 0 0
Other insurance related expenses 103 109 115
Other expenses 10 7 8
Total claims, benefits and expenses 1,352 1,402 1,539
Core income (loss) before income tax 105 (47) (199)
Income tax (expense) benefit on core income (loss) 21 56 90
Core income (loss)  126 9 (109)
Operating Segments | Corporate & Other      
Segment Reporting Information [Line Items]      
Net written premiums 0 0 1
Operating revenues      
Net earned premiums 0 0 1
Net investment income 15 64 74
Non-insurance warranty revenue 0 0 0
Other revenues 6 5 6
Total operating revenues 21 69 81
Claims, Benefits and Expenses      
Net incurred claims and benefits 109 67 62
Policyholders’ dividends 0 0 0
Amortization of deferred acquisition costs 0 0 0
Non-insurance warranty expense 0 0 0
Other insurance related expenses 9 (2) (2)
Other expenses 155 141 144
Total claims, benefits and expenses 273 206 204
Core income (loss) before income tax (252) (137) (123)
Income tax (expense) benefit on core income (loss) 48 23 30
Core income (loss)  (204) (114) (93)
Eliminations      
Segment Reporting Information [Line Items]      
Net written premiums (1) (1) (2)
Operating revenues      
Net earned premiums (1) (1) (2)
Net investment income 0 0 0
Non-insurance warranty revenue 0 0 0
Other revenues (6) (5) (5)
Total operating revenues (7) (6) (7)
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) (2)
Other expenses (6) (5) (5)
Total claims, benefits and expenses (7) (6) (7)
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
v3.22.0.1
Business Segments (Balance Sheet Information) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting Information [Line Items]    
Reinsurance receivables $ 5,484 $ 4,478
Insurance receivables 2,974 2,640
Deferred acquisition costs 737 708
Goodwill 148 148
Deferred non-insurance warranty acquisition expense 3,476 3,068
Insurance reserves    
Claim and claim adjustment expenses 24,174 22,706
Unearned premiums 5,761 5,119
Future policy benefits 13,236 13,318
Deferred non-insurance warranty revenue 4,503 4,023
Operating Segments | Specialty    
Segment Reporting Information [Line Items]    
Reinsurance receivables 1,200 886
Insurance receivables 1,136 1,052
Deferred acquisition costs 363 330
Goodwill 117 117
Deferred non-insurance warranty acquisition expense 3,476 3,068
Insurance reserves    
Claim and claim adjustment expenses 6,433 5,748
Unearned premiums 3,001 2,635
Future policy benefits 0 0
Deferred non-insurance warranty revenue 4,503 4,023
Operating Segments | Commercial    
Segment Reporting Information [Line Items]    
Reinsurance receivables 923 848
Insurance receivables 1,488 1,254
Deferred acquisition costs 278 281
Goodwill 0 0
Deferred non-insurance warranty acquisition expense 0 0
Insurance reserves    
Claim and claim adjustment expenses 8,890 8,250
Unearned premiums 2,066 1,824
Future policy benefits 0 0
Deferred non-insurance warranty revenue 0 0
Operating Segments | International    
Segment Reporting Information [Line Items]    
Reinsurance receivables 381 302
Insurance receivables 340 328
Deferred acquisition costs 96 97
Goodwill 31 31
Deferred non-insurance warranty acquisition expense 0 0
Insurance reserves    
Claim and claim adjustment expenses 2,280 2,091
Unearned premiums 585 546
Future policy benefits 0 0
Deferred non-insurance warranty revenue 0 0
Operating Segments | Life & Group    
Segment Reporting Information [Line Items]    
Reinsurance receivables 401 390
Insurance receivables 6 4
Deferred acquisition costs 0 0
Goodwill 0 0
Deferred non-insurance warranty acquisition expense 0 0
Insurance reserves    
Claim and claim adjustment expenses 3,754 3,743
Unearned premiums 109 114
Future policy benefits 13,236 13,318
Deferred non-insurance warranty revenue 0 0
Operating Segments | Corporate & Other    
Segment Reporting Information [Line Items]    
Reinsurance receivables 2,579 2,052
Insurance receivables 4 2
Deferred acquisition costs 0 0
Goodwill 0 0
Deferred non-insurance warranty acquisition expense 0 0
Insurance reserves    
Claim and claim adjustment expenses 2,817 2,874
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
v3.22.0.1
Business Segments (Revenues by Line of Business) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Total revenues $ 11,908 $ 10,808 $ 10,767
Total operating revenues 11,788 10,862 10,738
Net investment gains (losses) 120 (54) 29
Operating Segments | Specialty      
Total revenues 5,004 4,585 4,491
Operating Segments | Commercial      
Total revenues 4,199 3,861 3,796
Operating Segments | International      
Total revenues 1,114 998 1,037
Operating Segments | Life & Group      
Total revenues 1,457 1,355 1,340
Operating Segments | Corporate & Other      
Total revenues 21 69 81
Eliminations      
Total revenues (7) (6) (7)
Management & Professional Liability | Operating Segments | Specialty      
Total revenues 2,776 2,577 2,572
Surety | Operating Segments | Specialty      
Total revenues 604 596 596
Warranty & Alternative Risks | Operating Segments | Specialty      
Total revenues 1,624 1,412 1,323
Middle Market | Operating Segments | Commercial      
Total revenues 1,508 1,444 1,439
Construction | Operating Segments | Commercial      
Total revenues 1,322 1,120 1,043
Small Business | Operating Segments | Commercial      
Total revenues 558 482 504
Other Commercial | Operating Segments | Commercial      
Total revenues 811 815 810
Canada | Operating Segments | International      
Total revenues 344 291 277
Europe | Operating Segments | International      
Total revenues 473 389 363
Hardy | Operating Segments | International      
Total revenues $ 297 $ 318 $ 397
v3.22.0.1
Related Party Transactions Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Due to related parties $ 56 $ 89  
Fees and expenses of investment facilities and services      
Amounts reimbursed to Loews for services provided to the Company 47 47 $ 44
Due to related parties 23 22  
Corporate services and related travel expenses      
Amounts reimbursed to Loews for services provided to the Company 1 1  
Taxes paid      
Due from related parties 33 67  
Loews      
Amounts earned from Loews for insurance premiums $ 2 $ 2 $ 2
v3.22.0.1
Non-Insurance Revenues from Contracts with Customers (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Deferred non-insurance warranty revenue $ 4,503 $ 4,023
Contract with customer, liability, revenue recognized 1,200 1,100
Deferred non-insurance warranty acquisition expense 3,476 3,068
Amortization of deferred sales commissions 1,100 900
Capitalized Commission Costs    
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Deferred non-insurance warranty acquisition expense 3,500 3,100
Capitalized Administrator Service Costs    
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Deferred non-insurance warranty acquisition expense $ 47 $ 37
v3.22.0.1
Non-Insurance Revenues from Contracts with Customers (Performance Obligation) (Details)
$ in Billions
Dec. 31, 2021
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01  
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]  
Remaining performance obligation, expected timing of satisfaction, period 12 months
Remaining performance obligation, amount $ 1.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01  
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]  
Remaining performance obligation, expected timing of satisfaction, period 1 year
Remaining performance obligation, amount $ 1.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01  
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]  
Remaining performance obligation, expected timing of satisfaction, period 1 year
Remaining performance obligation, amount $ 0.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01  
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]  
Remaining performance obligation, expected timing of satisfaction, period
Remaining performance obligation, amount $ 1.3
v3.22.0.1
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, 2021
Dec. 31, 2020
Dec. 31, 2019
Revenues      
Net investment income $ 2,159 $ 1,935 $ 2,118
Net investment gains (losses) 120 (54) 29
Total revenues 11,908 10,808 10,767
Expenses      
Interest 113 122 131
Income tax benefit (282) (131) (223)
Net income 1,202 690 1,000
Total comprehensive income 719 1,442 1,929
Parent Company      
Revenues      
Net investment income 0 3 13
Net investment gains (losses) 0 (20) (21)
Total revenues 0 (17) (8)
Expenses      
Administrative and general 1 1 1
Interest 112 122 131
Total expenses 113 123 132
Loss from operations before income taxes and equity in net income of subsidiaries (113) (140) (140)
Income tax benefit 11 18 21
Loss before equity in net income of subsidiaries (102) (122) (119)
Equity in net income of subsidiaries 1,304 812 1,119
Net income 1,202 690 1,000
Equity in other comprehensive (loss) income of subsidiaries (483) 752 929
Total comprehensive income $ 719 $ 1,442 $ 1,929
v3.22.0.1
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, 2021
Dec. 31, 2020
Dec. 31, 2019
Assets      
Cash $ 536 $ 419  
Other assets 2,261 1,628  
Total assets 66,639 64,026  
Liabilities      
Long term debt 2,779 2,776  
Other liabilities 3,377 3,377  
Total liabilities 53,830 51,319  
Stockholders' Equity      
Common stock ($2.50 par value; 500,000,000 shares authorized; 273,040,243 shares issued; 271,363,999 and 271,391,603 shares outstanding) 683 683  
Additional paid-in capital 2,215 2,211  
Retained earnings 9,663 9,081  
Accumulated other comprehensive income 320 803  
Treasury stock (1,676,244 and 1,648,640 shares), at cost (72) (71)  
Total stockholders’ equity 12,809 12,707 $ 12,215
Total liabilities and stockholders' equity $ 66,639 $ 64,026  
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) 271,363,999 271,391,603  
Treasury stock, shares (in shares) 1,676,244 1,648,640  
Parent Company      
Assets      
Investment in subsidiaries $ 14,937 $ 14,996  
Cash 1 0  
Short term investments 685 522  
Amounts due from affiliates 3 4  
Other assets 0 1  
Total assets 15,626 15,523  
Liabilities      
Long term debt 2,779 2,776  
Other liabilities 38 40  
Total liabilities 2,817 2,816  
Stockholders' Equity      
Common stock ($2.50 par value; 500,000,000 shares authorized; 273,040,243 shares issued; 271,363,999 and 271,391,603 shares outstanding) 683 683  
Additional paid-in capital 2,215 2,211  
Retained earnings 9,663 9,081  
Accumulated other comprehensive income 320 803  
Treasury stock (1,676,244 and 1,648,640 shares), at cost (72) (71)  
Total stockholders’ equity 12,809 12,707  
Total liabilities and stockholders' equity $ 15,626 $ 15,523  
v3.22.0.1
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, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash Flows from Operating Activities      
Net income $ 1,202 $ 690 $ 1,000
Adjustments to reconcile net income to net cash flows provided by operating activities:      
Net investment income (120) 54 (29)
Other, net (76) (145) (225)
Net cash flows provided by operating activities 1,997 1,775 1,140
Cash Flows from Investing Activities      
Change in short term investments (83) (39) (535)
Other, net 1 16 15
Net cash flows used by investing activities (1,228) (705) (225)
Cash Flows from Financing Activities      
Dividends paid to common stockholders (621) (950) (929)
Proceeds from the issuance of debt 0 495 496
Repayment of debt 0 (419) (520)
Purchase of treasury stock (18) (18) (23)
Other, net (9) (10) (12)
Net cash flows used by financing activities (648) (902) (988)
Net change in cash 117 177 (68)
Cash, beginning of year 419 242 310
Cash, end of period 536 419 242
Parent Company      
Cash Flows from Operating Activities      
Net income 1,202 690 1,000
Adjustments to reconcile net income to net cash flows provided by operating activities:      
Equity in net income of subsidiaries (1,304) (812) (1,119)
Dividends received from subsidiaries 880 975 1,065
Net investment income 0 20 21
Other, net 33 26 13
Net cash flows provided by operating activities 811 899 980
Cash Flows from Investing Activities      
Change in short term investments (163) 2 10
Capital contributions to subsidiaries 0 (1) (2)
Other, net 0 0 0
Net cash flows used by investing activities (163) 1 8
Cash Flows from Financing Activities      
Dividends paid to common stockholders (621) (950) (929)
Proceeds from the issuance of debt 0 495 496
Repayment of debt 0 (419) (520)
Purchase of treasury stock (18) (18) (23)
Other, net (8) (9) (12)
Net cash flows used by financing activities (647) (901) (988)
Net change in cash 1 (1) 0
Cash, beginning of year 0 1 1
Cash, end of period $ 1 $ 0 $ 1
v3.22.0.1
Schedule II. Condensed Financial Information of Registrant (Parent Company) (Narrative) (Details)
Dec. 31, 2021
CNAF Consolidated | Loews  
Condensed Financial Statements, Captions [Line Items]  
Noncontrolling interest, ownership percentage by parent 89.60%
v3.22.0.1
Schedule V. Valuation and Qualifying Accounts (Schedule of valuation and qualifying accounts) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Mortgage loan receivables      
Movement in valuation allowances and reserves [Roll Forward]      
Balance Beginning of Period $ 26 $ 7  
Charged to Costs and Expenses 0 0  
Charged to Other Accounts (10) 19  
Deductions 0 0  
Balance at End of Period 16 26 $ 7
Insurance and reinsurance receivables      
Movement in valuation allowances and reserves [Roll Forward]      
Balance Beginning of Period 54 57 71
Charged to Costs and Expenses 4 4 (6)
Charged to Other Accounts 0 0 0
Deductions (8) (7) (8)
Balance at End of Period 50 54 57
Fixed maturity securities      
Movement in valuation allowances and reserves [Roll Forward]      
Balance Beginning of Period 40 6  
Charged to Costs and Expenses 0 0  
Charged to Other Accounts 30 92  
Deductions (52) (58)  
Balance at End of Period $ 18 $ 40 $ 6
v3.22.0.1
Schedule VI. Supplemental Information Concerning Property and Casualty Insurance Operations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Incurred claim and claim adjustment expenses related to current year $ 5,970 $ 5,793 $ 5,356
Incurred claim and claim adjustment expenses related to prior years (104) (119) (127)
Consolidated Property and Casualty Insurance Entity      
Deferred acquisition costs 737 708  
Reserves for unpaid claim and claim adjustment expenses 24,174 22,706  
Discount deducted from claim and claim adjustment expense reserves above (based on interest rates ranging from 3.5% to 6.4%) 1,146 1,209  
Unearned premiums 5,761 5,119  
Net written premiums 8,405 8,059 7,656
Net earned premiums 8,175 7,649 7,428
Net investment income 2,111 1,896 2,063
Incurred claim and claim adjustment expenses related to current year   5,793 5,356
Incurred claim and claim adjustment expenses related to prior years   (119) (127)
Amortization of deferred acquisition costs $ 1,443 1,410 1,383
Paid claim and claim adjustment expenses   $ 5,164 $ 5,576
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%