v3.26.1
Business Segments (Balance Sheet Information) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Segment Reporting Information [Line Items]      
Reinsurance receivables $ 6,419 $ 6,408  
Insurance receivables 3,745 3,764  
Deferred acquisition costs 1,008 986  
Goodwill 147 148  
Deferred non-insurance warranty acquisition expense 3,098 3,220  
Insurance reserves      
Claim and claim adjustment expenses 26,933 26,599  
Unearned premiums 7,646 7,635  
Future policy benefits 13,195 13,448 $ 13,304
Deferred non-insurance warranty revenue 3,976 4,138  
Operating Segments | Specialty      
Segment Reporting Information [Line Items]      
Reinsurance receivables 1,658 1,716  
Insurance receivables 885 1,008  
Deferred acquisition costs 454 447  
Goodwill 117 117  
Deferred non-insurance warranty acquisition expense 3,098 3,220  
Insurance reserves      
Claim and claim adjustment expenses 7,785 7,784  
Unearned premiums 3,281 3,317  
Future policy benefits 0 0  
Deferred non-insurance warranty revenue 3,976 4,138  
Operating Segments | Commercial      
Segment Reporting Information [Line Items]      
Reinsurance receivables 1,901 1,762  
Insurance receivables 2,432 2,315  
Deferred acquisition costs 407 391  
Goodwill 0 0  
Deferred non-insurance warranty acquisition expense 0 0  
Insurance reserves      
Claim and claim adjustment expenses 12,668 12,249  
Unearned premiums 3,453 3,411  
Future policy benefits 0 0  
Deferred non-insurance warranty revenue 0 0  
Operating Segments | International      
Segment Reporting Information [Line Items]      
Reinsurance receivables 575 577  
Insurance receivables 427 438  
Deferred acquisition costs 147 148  
Goodwill 30 31  
Deferred non-insurance warranty acquisition expense 0 0  
Insurance reserves      
Claim and claim adjustment expenses 3,396 3,376  
Unearned premiums 806 819  
Future policy benefits 0 0  
Deferred non-insurance warranty revenue 0 0  
Operating Segments | Life & Group      
Segment Reporting Information [Line Items]      
Reinsurance receivables 56 56  
Insurance receivables 1 2  
Deferred acquisition costs 0 0  
Goodwill 0 0  
Deferred non-insurance warranty acquisition expense 0 0  
Insurance reserves      
Claim and claim adjustment expenses 578 591  
Unearned premiums 107 88  
Future policy benefits 13,195 13,448  
Deferred non-insurance warranty revenue 0 0  
Operating Segments | Corporate & Other      
Segment Reporting Information [Line Items]      
Reinsurance receivables 2,229 2,297  
Insurance receivables 0 1  
Deferred acquisition costs 0 0  
Goodwill 0 0  
Deferred non-insurance warranty acquisition expense 0 0  
Insurance reserves      
Claim and claim adjustment expenses 2,506 2,599  
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 (1) 0  
Future policy benefits 0 0  
Deferred non-insurance warranty revenue $ 0 $ 0