v3.26.1
Long-duration Contracts - Schedule of Rollforward by Product Within Future Policy Benefits (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Present value of expected future policy benefits        
Net future policy benefits $ 48,657 $ 49,897    
Total        
Present value of expected net premiums        
Beginning balance, present value of expected net premiums 1,402 880    
Effect of changes in discount rate assumptions, beginning balance (25) (30)    
Effect of foreign exchange on the change in discount rate assumptions, beginning balance 1 2    
Beginning balance at original discount rate 1,378 852    
Effect of actual to expected experience     $ (4)  
Adjusted balance     1,374  
Issuances 4      
Interest accrual 13 4    
Net premium collected (82) (47)    
Foreign exchange (9) 40    
Ending balance at original discount rate 1,300 849 1,378 $ 852
Effect of changes in discount rate assumptions, ending balance (7) (20)    
Effect of foreign exchange on the change in discount rate assumptions, ending balance 1 1    
Ending balance, present value of expected net premiums 1,306 868    
Present value of expected future policy benefits        
Beginning balance, present value of expected future policy benefits 45,853 44,972    
Effect of changes in discount rate assumptions 6,977 7,584    
Effect of foreign exchange on the change in discount rate assumptions (26) (6)    
Beginning balance at original discount rate 52,804 52,550    
Effect of actual to expected experience     11 (40)
Adjusted balance     52,815 52,510
Issuances 131 75    
Interest accrual 476 459    
Benefit payments (1,170) (1,154)    
Foreign exchange (52) 168    
Ending balance at original discount rate 52,200 52,058    
Effect of changes in discount rate assumptions 7,904 7,066    
Effect of foreign exchange on the change in discount rate assumptions (47) 16    
Ending balance, present value of expected future policy benefits 44,343 44,976    
Less: Present value of expected net premiums 1,306 868 1,402 880
Net future policy benefits 43,037 44,108    
Payout Annuities with Life Contingencies        
Present value of expected net premiums        
Beginning balance, present value of expected net premiums 0 0    
Effect of changes in discount rate assumptions, beginning balance 0 0    
Effect of foreign exchange on the change in discount rate assumptions, beginning balance 0 0    
Beginning balance at original discount rate 0 0    
Effect of actual to expected experience     0  
Adjusted balance     0  
Issuances 0      
Interest accrual 0 0    
Net premium collected 0 0    
Foreign exchange 0 0    
Ending balance at original discount rate 0 0 0 0
Effect of changes in discount rate assumptions, ending balance 0 0    
Effect of foreign exchange on the change in discount rate assumptions, ending balance 0 0    
Ending balance, present value of expected net premiums 0 0    
Present value of expected future policy benefits        
Beginning balance, present value of expected future policy benefits 42,058 42,261    
Effect of changes in discount rate assumptions 5,941 7,378    
Effect of foreign exchange on the change in discount rate assumptions 21 (5)    
Beginning balance at original discount rate 48,020 49,634    
Effect of actual to expected experience     (2) (42)
Adjusted balance     48,018 49,592
Issuances 127 75    
Interest accrual 433 442    
Benefit payments (1,082) (1,132)    
Foreign exchange (14) 25    
Ending balance at original discount rate 47,482 49,002    
Effect of changes in discount rate assumptions 6,753 6,778    
Effect of foreign exchange on the change in discount rate assumptions 14 6    
Ending balance, present value of expected future policy benefits 40,715 42,218    
Less: Present value of expected net premiums 0 0 0 0
Net future policy benefits $ 40,715 $ 42,218    
Liability for Future Policy Benefit, after Reinsurance [Abstract]        
Weighted-average liability duration (in years) 9 years 2 months 12 days 9 years 4 months 24 days    
Weighted-average interest accretion rate 3.70% 3.70%    
Weighted-average current discount rate 5.50% 5.40%    
Expected future gross premiums, undiscounted $ 0 $ 0    
Expected future gross premiums, discounted 0 0    
Expected future benefit payments, undiscounted 69,188 71,699    
Whole Life        
Present value of expected net premiums        
Beginning balance, present value of expected net premiums 1,402 880    
Effect of changes in discount rate assumptions, beginning balance (25) (30)    
Effect of foreign exchange on the change in discount rate assumptions, beginning balance 1 2    
Beginning balance at original discount rate 1,378 852    
Effect of actual to expected experience     (4)  
Adjusted balance     1,374  
Issuances 4      
Interest accrual 13 4    
Net premium collected (82) (47)    
Foreign exchange (9) 40    
Ending balance at original discount rate 1,300 849 1,378 852
Effect of changes in discount rate assumptions, ending balance (7) (20)    
Effect of foreign exchange on the change in discount rate assumptions, ending balance 1 1    
Ending balance, present value of expected net premiums 1,306 868    
Present value of expected future policy benefits        
Beginning balance, present value of expected future policy benefits 3,795 2,711    
Effect of changes in discount rate assumptions 1,036 206    
Effect of foreign exchange on the change in discount rate assumptions (47) (1)    
Beginning balance at original discount rate 4,784 2,916    
Effect of actual to expected experience     13 2
Adjusted balance     4,797 2,918
Issuances 4 0    
Interest accrual 43 17    
Benefit payments (88) (22)    
Foreign exchange (38) 143    
Ending balance at original discount rate 4,718 3,056    
Effect of changes in discount rate assumptions 1,151 288    
Effect of foreign exchange on the change in discount rate assumptions (61) 10    
Ending balance, present value of expected future policy benefits 3,628 2,758    
Less: Present value of expected net premiums 1,306 868 $ 1,402 $ 880
Net future policy benefits $ 2,322 $ 1,890    
Liability for Future Policy Benefit, after Reinsurance [Abstract]        
Weighted-average liability duration (in years) 20 years 1 month 6 days 30 years    
Weighted-average interest accretion rate 5.20% 4.80%    
Weighted-average current discount rate 6.50% 4.70%    
Expected future gross premiums, undiscounted $ 1,844 $ 1,073    
Expected future gross premiums, discounted 1,484 927    
Expected future benefit payments, undiscounted $ 11,477 $ 10,126