v3.26.3
Investments (Net Realized Gains (Losses) And Losses Included In Net Realized Gains (Losses) And Other Comprehensive Income) (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Gain (Loss) on Securities [Line Items]        
Net realized gains (losses) $ (455) $ 283 $ (700) $ 327
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Period Increase (Decrease) 21 25 58 76
Debt Securities, Available-for-sale, Gain (Loss), Total (145) 46 (248) (58)
Foreign exchange (112) (115) (137) (269)
Other (2) 2 (18) (5)
Fixed Maturities [Member]        
Gain (Loss) on Securities [Line Items]        
Debt Securities, Available-for-Sale, Realized Gain 12 121 120 228
Debt Securities, Available-for-Sale, Realized Loss 98 157 347 376
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Period Increase (Decrease) (5) 22 0 21
Debt Securities, Available-For-Sale, Credit Impairment Charges Intent to Sell [1] (15) (22) (72) (34)
Other Investments        
Gain (Loss) on Securities [Line Items]        
Net realized gains (losses) (39) 82 51 103
Equity Securities        
Gain (Loss) on Securities [Line Items]        
Equity Securities, FV-NI, Realized Gain (Loss) (329) 396 (352) 596
Private equities        
Gain (Loss) on Securities [Line Items]        
Net realized gains (losses) (105) 48 4 31
Other investments - Fixed Maturities [Member]        
Gain (Loss) on Securities [Line Items]        
Net realized gains (losses) 84 (116) 127 (116)
Reserved alternative investment fund        
Gain (Loss) on Securities [Line Items]        
Equity Securities, FV-NI, Realized Gain (Loss) (250) 66 (319) 131
Investment and embedded derivative instruments        
Gain (Loss) on Securities [Line Items]        
Gain (Loss) on Derivative 233 (85) 63 46
Other derivative instruments        
Gain (Loss) on Securities [Line Items]        
Gain (Loss) on Derivative $ 5 $ (9) $ (12) $ (14)
[1] Relates to certain securities we intend to sell and securities written to market entering default.