v3.26.1
Investments - Schedule of Amortized Cost, Gross Unrealized Gains (Losses), Allowance for Credit Losses and Fair Value of Our Fixed Maturity Securities Classified as Available-For-Sale (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Schedule of Investments [Line Items]        
Amortized cost $ 48,192 $ 48,150    
Gross unrealized gains 615 871    
Gross unrealized losses (3,689) (3,236)    
Allowance for credit losses (23) (23) $ (14) $ (10)
Fair value 45,095 45,762    
U.S. government, agencies and government-sponsored enterprises        
Schedule of Investments [Line Items]        
Amortized cost 3,967 3,999    
Gross unrealized gains 50 66    
Gross unrealized losses (401) (364)    
Allowance for credit losses 0 0    
Fair value 3,616 3,701    
State and political subdivisions        
Schedule of Investments [Line Items]        
Amortized cost 2,336 2,356    
Gross unrealized gains 15 13    
Gross unrealized losses (265) (255)    
Allowance for credit losses 0 0    
Fair value 2,086 2,114    
Non-U.S. government        
Schedule of Investments [Line Items]        
Amortized cost 1,276 1,257    
Gross unrealized gains 19 36    
Gross unrealized losses (98) (76)    
Allowance for credit losses (6) (2)    
Fair value 1,191 1,215    
U.S. corporate        
Schedule of Investments [Line Items]        
Amortized cost 28,301 28,356    
Gross unrealized gains 406 572    
Gross unrealized losses (2,188) (1,874)    
Allowance for credit losses (10) (8) (6) (4)
Fair value 26,509 27,046    
U.S. corporate | Utilities        
Schedule of Investments [Line Items]        
Amortized cost 4,848 4,798    
Gross unrealized gains 64 95    
Gross unrealized losses (426) (375)    
Allowance for credit losses (3) (3)    
Fair value 4,483 4,515    
U.S. corporate | Energy        
Schedule of Investments [Line Items]        
Amortized cost 2,506 2,506    
Gross unrealized gains 57 69    
Gross unrealized losses (138) (123)    
Allowance for credit losses 0 0    
Fair value 2,425 2,452    
U.S. corporate | Finance and insurance        
Schedule of Investments [Line Items]        
Amortized cost 7,434 7,435    
Gross unrealized gains 68 109    
Gross unrealized losses (580) (487)    
Allowance for credit losses 0 0    
Fair value 6,922 7,057    
U.S. corporate | Consumer—non-cyclical        
Schedule of Investments [Line Items]        
Amortized cost 4,630 4,591    
Gross unrealized gains 72 98    
Gross unrealized losses (342) (279)    
Allowance for credit losses (6) (4)    
Fair value 4,354 4,406    
U.S. corporate | Technology and communications        
Schedule of Investments [Line Items]        
Amortized cost 2,871 2,947    
Gross unrealized gains 43 58    
Gross unrealized losses (294) (256)    
Allowance for credit losses 0 0    
Fair value 2,620 2,749    
U.S. corporate | Industrial        
Schedule of Investments [Line Items]        
Amortized cost 986 1,030    
Gross unrealized gains 9 14    
Gross unrealized losses (99) (89)    
Allowance for credit losses (1) (1)    
Fair value 895 954    
U.S. corporate | Capital goods        
Schedule of Investments [Line Items]        
Amortized cost 2,353 2,359    
Gross unrealized gains 46 65    
Gross unrealized losses (126) (105)    
Allowance for credit losses 0 0    
Fair value 2,273 2,319    
U.S. corporate | Consumer—cyclical        
Schedule of Investments [Line Items]        
Amortized cost 1,286 1,295    
Gross unrealized gains 14 23    
Gross unrealized losses (81) (69)    
Allowance for credit losses 0 0    
Fair value 1,219 1,249    
U.S. corporate | Transportation        
Schedule of Investments [Line Items]        
Amortized cost 1,113 1,115    
Gross unrealized gains 31 37    
Gross unrealized losses (87) (77)    
Allowance for credit losses 0 0    
Fair value 1,057 1,075    
U.S. corporate | Other        
Schedule of Investments [Line Items]        
Amortized cost 274 280    
Gross unrealized gains 2 4    
Gross unrealized losses (15) (14)    
Allowance for credit losses 0 0    
Fair value 261 270    
Non-U.S. corporate        
Schedule of Investments [Line Items]        
Amortized cost 7,377 7,430    
Gross unrealized gains 102 149    
Gross unrealized losses (430) (379)    
Allowance for credit losses (4) (9) (4) (3)
Fair value 7,045 7,191    
Non-U.S. corporate | Utilities        
Schedule of Investments [Line Items]        
Amortized cost 635 672    
Gross unrealized gains 2 4    
Gross unrealized losses (38) (36)    
Allowance for credit losses 0 (3)    
Fair value 599 637    
Non-U.S. corporate | Energy        
Schedule of Investments [Line Items]        
Amortized cost 935 957    
Gross unrealized gains 21 27    
Gross unrealized losses (37) (36)    
Allowance for credit losses (4) (4)    
Fair value 915 944    
Non-U.S. corporate | Finance and insurance        
Schedule of Investments [Line Items]        
Amortized cost 1,760 1,751    
Gross unrealized gains 30 43    
Gross unrealized losses (90) (75)    
Allowance for credit losses 0 0    
Fair value 1,700 1,719    
Non-U.S. corporate | Consumer—non-cyclical        
Schedule of Investments [Line Items]        
Amortized cost 619 615    
Gross unrealized gains 4 6    
Gross unrealized losses (73) (64)    
Allowance for credit losses 0 0    
Fair value 550 557    
Non-U.S. corporate | Technology and communications        
Schedule of Investments [Line Items]        
Amortized cost 772 743    
Gross unrealized gains 6 9    
Gross unrealized losses (72) (63)    
Allowance for credit losses 0 0    
Fair value 706 689    
Non-U.S. corporate | Industrial        
Schedule of Investments [Line Items]        
Amortized cost 761 769    
Gross unrealized gains 12 19    
Gross unrealized losses (32) (27)    
Allowance for credit losses 0 0    
Fair value 741 761    
Non-U.S. corporate | Capital goods        
Schedule of Investments [Line Items]        
Amortized cost 713 710    
Gross unrealized gains 6 11    
Gross unrealized losses (33) (29)    
Allowance for credit losses 0 0    
Fair value 686 692    
Non-U.S. corporate | Consumer—cyclical        
Schedule of Investments [Line Items]        
Amortized cost 231 255    
Gross unrealized gains 1 3    
Gross unrealized losses (11) (8)    
Allowance for credit losses 0 0    
Fair value 221 250    
Non-U.S. corporate | Transportation        
Schedule of Investments [Line Items]        
Amortized cost 504 491    
Gross unrealized gains 11 15    
Gross unrealized losses (24) (21)    
Allowance for credit losses 0 0    
Fair value 491 485    
Non-U.S. corporate | Other        
Schedule of Investments [Line Items]        
Amortized cost 447 467    
Gross unrealized gains 9 12    
Gross unrealized losses (20) (20)    
Allowance for credit losses 0 (2)    
Fair value 436 457    
Residential mortgage-backed        
Schedule of Investments [Line Items]        
Amortized cost 1,089 1,115    
Gross unrealized gains 12 19    
Gross unrealized losses (37) (34)    
Allowance for credit losses 0 0    
Fair value 1,064 1,100    
Commercial mortgage-backed        
Schedule of Investments [Line Items]        
Amortized cost 1,596 1,536    
Gross unrealized gains 2 3    
Gross unrealized losses (237) (226)    
Allowance for credit losses (3) (4) $ (4) $ (3)
Fair value 1,358 1,309    
Other asset-backed        
Schedule of Investments [Line Items]        
Amortized cost 2,250 2,101    
Gross unrealized gains 9 13    
Gross unrealized losses (33) (28)    
Allowance for credit losses 0 0    
Fair value $ 2,226 $ 2,086