v3.26.1
Investments (Net Realized Gains (Losses) And Losses Included In Net Realized Gains (Losses) And Other Comprehensive Income) (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Gain (Loss) on Securities [Line Items]        
Net realized gains (losses) $ 162 $ 160 $ (245) $ 44
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Period Increase (Decrease) 18 30 37 51
Debt Securities, Available-for-sale, Gain (Loss), Total 18 (7) (103) (104)
Foreign exchange (17) (89) (25) (154)
Other 5 (5) (16) (7)
Fixed Maturities [Member]        
Gain (Loss) on Securities [Line Items]        
Debt Securities, Available-for-Sale, Realized Gain 68 69 108 107
Debt Securities, Available-for-Sale, Realized Loss 125 123 249 219
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Period Increase (Decrease) 2 (9) 5 (1)
Debt Securities, Available-For-Sale, Credit Impairment Charges Intent to Sell [1] (25) (5) (57) (12)
Other Investments        
Gain (Loss) on Securities [Line Items]        
Net realized gains (losses) 98 61 90 21
Equity Securities        
Gain (Loss) on Securities [Line Items]        
Equity Securities, FV-NI, Realized Gain (Loss) 126 137 (23) 200
Private equities        
Gain (Loss) on Securities [Line Items]        
Net realized gains (losses) 93 (28) 109 (17)
Other investments - Fixed Maturities [Member]        
Gain (Loss) on Securities [Line Items]        
Net realized gains (losses) 63 53 43 0
Reserved alternative investment fund        
Gain (Loss) on Securities [Line Items]        
Equity Securities, FV-NI, Realized Gain (Loss) (2) 12 (69) 65
Investment and embedded derivative instruments        
Gain (Loss) on Securities [Line Items]        
Gain (Loss) on Derivative (55) 154 (170) 131
Other derivative instruments        
Gain (Loss) on Securities [Line Items]        
Gain (Loss) on Derivative $ (8) $ (2) $ (17) $ (5)
[1] Relates to certain securities we intend to sell and securities written to market entering default.