v3.26.3
Investments - Investments - Available-for-Sale Securities (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Jun. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]            
Fixed maturities, available-for-sale, at fair value, amortized cost $ 48,913   $ 46,871      
Debt Securities, Available-for-Sale, Allowance for Credit Loss (19) $ (16) (16) $ (14) $ (14) $ (16)
Gross Unrealized Gains, fixed maturities, available-for-sale 92   610      
Gross Unrealized Losses, fixed maturities, available-for-sale (3,084)   (1,424)      
Debt Securities, Available-for-Sale, Total 45,902   46,041      
ABS            
Debt Securities, Available-for-sale [Line Items]            
Fixed maturities, available-for-sale, at fair value, amortized cost 4,933   4,628      
Debt Securities, Available-for-Sale, Allowance for Credit Loss 0   0      
Gross Unrealized Gains, fixed maturities, available-for-sale 5   51      
Gross Unrealized Losses, fixed maturities, available-for-sale (105)   (16)      
Debt Securities, Available-for-Sale, Total 4,833   4,663      
Collateralized Loan Obligations [Member]            
Debt Securities, Available-for-sale [Line Items]            
Fixed maturities, available-for-sale, at fair value, amortized cost 3,652   3,310      
Debt Securities, Available-for-Sale, Allowance for Credit Loss (2) (2) (2)      
Gross Unrealized Gains, fixed maturities, available-for-sale 5   9      
Gross Unrealized Losses, fixed maturities, available-for-sale (3)   (1)      
Debt Securities, Available-for-Sale, Total 3,652   3,316      
CMBS            
Debt Securities, Available-for-sale [Line Items]            
Fixed maturities, available-for-sale, at fair value, amortized cost 1,781   2,468      
Debt Securities, Available-for-Sale, Allowance for Credit Loss (13) (14) (14) (14) $ (14) (13)
Gross Unrealized Gains, fixed maturities, available-for-sale 18   24      
Gross Unrealized Losses, fixed maturities, available-for-sale (181)   (150)      
Debt Securities, Available-for-Sale, Total 1,605   2,328      
Corporate            
Debt Securities, Available-for-sale [Line Items]            
Fixed maturities, available-for-sale, at fair value, amortized cost 25,083   23,305      
Debt Securities, Available-for-Sale, Allowance for Credit Loss (4) $ 0 0 $ 0   $ (3)
Gross Unrealized Gains, fixed maturities, available-for-sale 42   375      
Gross Unrealized Losses, fixed maturities, available-for-sale (1,604)   (604)      
Debt Securities, Available-for-Sale, Total 23,517   23,076      
Foreign Govt./Govt. Agencies            
Debt Securities, Available-for-sale [Line Items]            
Fixed maturities, available-for-sale, at fair value, amortized cost 450   440      
Debt Securities, Available-for-Sale, Allowance for Credit Loss 0   0      
Gross Unrealized Gains, fixed maturities, available-for-sale 2   9      
Gross Unrealized Losses, fixed maturities, available-for-sale (14)   (2)      
Debt Securities, Available-for-Sale, Total 438   447      
Municipal            
Debt Securities, Available-for-sale [Line Items]            
Fixed maturities, available-for-sale, at fair value, amortized cost 4,341   4,831      
Debt Securities, Available-for-Sale, Allowance for Credit Loss 0   0      
Gross Unrealized Gains, fixed maturities, available-for-sale 19   89      
Gross Unrealized Losses, fixed maturities, available-for-sale (458)   (268)      
Debt Securities, Available-for-Sale, Total 3,902   4,652      
RMBS            
Debt Securities, Available-for-sale [Line Items]            
Fixed maturities, available-for-sale, at fair value, amortized cost 6,147   6,372      
Debt Securities, Available-for-Sale, Allowance for Credit Loss 0   0      
Gross Unrealized Gains, fixed maturities, available-for-sale 1   50      
Gross Unrealized Losses, fixed maturities, available-for-sale (463)   (244)      
Debt Securities, Available-for-Sale, Total 5,685   6,178      
U.S. Treasuries            
Debt Securities, Available-for-sale [Line Items]            
Fixed maturities, available-for-sale, at fair value, amortized cost 2,526   1,517      
Debt Securities, Available-for-Sale, Allowance for Credit Loss 0   0      
Gross Unrealized Gains, fixed maturities, available-for-sale 0   3      
Gross Unrealized Losses, fixed maturities, available-for-sale (256)   (139)      
Debt Securities, Available-for-Sale, Total $ 2,270   $ 1,381