v3.26.1
Long-duration Contracts - Schedule of Rollforward by Product Within Future Policy Benefits (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Present value of expected future policy benefits        
Net future policy benefits $ 48,241 $ 49,400    
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     $ (8) $ (1)
Adjusted balance     1,370 851
Issuances 7      
Interest accrual 25 10    
Net premium collected (161) (92)    
Foreign exchange (25) 76    
Ending balance at original discount rate 1,216 845 1,378 852
Effect of changes in discount rate assumptions   23 25 30
Effect of foreign exchange on the change in discount rate assumptions, ending balance 1      
Ending balance, present value of expected net premiums 1,215 868    
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     (15) (62)
Adjusted balance     52,789 52,488
Issuances 280 133    
Interest accrual 945 914    
Benefit payments (2,360) (2,287)    
Foreign exchange (123) 345    
Ending balance at original discount rate 51,531 51,593    
Effect of changes in discount rate assumptions 7,712 7,018    
Effect of foreign exchange on the change in discount rate assumptions (72) 52    
Ending balance, present value of expected future policy benefits 43,891 44,523    
Less: Present value of expected net premiums 1,215 868 1,402 880
Net future policy benefits 42,676 43,655    
Less: Reinsurance recoverable 5      
Net future policy benefits, net of reinsurance 42,671      
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 0
Adjusted balance     0 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   0 0 0
Effect of foreign exchange on the change in discount rate assumptions, ending balance 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     (49) (64)
Adjusted balance     47,971 49,570
Issuances 273 133    
Interest accrual 861 879    
Benefit payments (2,158) (2,238)    
Foreign exchange (13) 75    
Ending balance at original discount rate 46,934 48,419    
Effect of changes in discount rate assumptions 6,531 6,465    
Effect of foreign exchange on the change in discount rate assumptions 15 28    
Ending balance, present value of expected future policy benefits 40,388 41,926    
Less: Present value of expected net premiums 0 0 0 0
Net future policy benefits 40,388 $ 41,926    
Less: Reinsurance recoverable 0      
Net future policy benefits, net of reinsurance $ 40,388      
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% 5.30%    
Expected future gross premiums, undiscounted $ 0 $ 0    
Expected future gross premiums, discounted 0 0    
Expected future benefit payments, undiscounted 69,045 70,754    
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     (8) (1)
Adjusted balance     1,370 851
Issuances 7      
Interest accrual 25 10    
Net premium collected (161) (92)    
Foreign exchange (25) 76    
Ending balance at original discount rate 1,216 845 1,378 852
Effect of changes in discount rate assumptions   23 25 30
Effect of foreign exchange on the change in discount rate assumptions, ending balance 1      
Ending balance, present value of expected net premiums 1,215 868    
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     34 2
Adjusted balance     4,818 2,918
Issuances 7 0    
Interest accrual 84 35    
Benefit payments (202) (49)    
Foreign exchange (110) 270    
Ending balance at original discount rate 4,597 3,174    
Effect of changes in discount rate assumptions 1,181 553    
Effect of foreign exchange on the change in discount rate assumptions (87) 24    
Ending balance, present value of expected future policy benefits 3,503 2,597    
Less: Present value of expected net premiums 1,215 868 $ 1,402 $ 880
Net future policy benefits 2,288 $ 1,729    
Less: Reinsurance recoverable 5      
Net future policy benefits, net of reinsurance $ 2,283      
Liability for Future Policy Benefit, after Reinsurance [Abstract]        
Weighted-average liability duration (in years) 19 years 6 months 29 years 4 months 24 days    
Weighted-average interest accretion rate 5.20% 4.80%    
Weighted-average current discount rate 6.50% 5.10%    
Expected future gross premiums, undiscounted $ 1,715 $ 1,064    
Expected future gross premiums, discounted 1,380 919    
Expected future benefit payments, undiscounted $ 10,554 $ 10,085