v3.26.1
Reinsurance - Schedule of Sources of Income Related to Funds Withheld Under Reinsurance Treaties (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Effects of Reinsurance [Line Items]    
Other investment expenses on funds withheld assets $ (63) $ (94)
Total net investment income 740 755
Funds withheld assets    
Effects of Reinsurance [Line Items]    
Total investment income on funds withheld assets 210 240
Other investment expenses on funds withheld assets (11) (13)
Total net investment income 199 227
Debt Securities | Funds withheld assets    
Effects of Reinsurance [Line Items]    
Total investment income on funds withheld assets 87 100
Debt securities, at fair value under the fair value option | Funds withheld assets    
Effects of Reinsurance [Line Items]    
Total investment income on funds withheld assets 0 1
Equity securities | Funds withheld assets    
Effects of Reinsurance [Line Items]    
Total investment income on funds withheld assets (1) 0
Mortgage loans | Funds withheld assets    
Effects of Reinsurance [Line Items]    
Total investment income on funds withheld assets 26 43
Mortgage loans, at fair value under the fair value option | Funds withheld assets    
Effects of Reinsurance [Line Items]    
Total investment income on funds withheld assets 2 4
Policy loans | Funds withheld assets    
Effects of Reinsurance [Line Items]    
Total investment income on funds withheld assets 87 83
Limited partnerships | Funds withheld assets    
Effects of Reinsurance [Line Items]    
Total investment income on funds withheld assets 8 10
Other investment income | Funds withheld assets    
Effects of Reinsurance [Line Items]    
Total investment income on funds withheld assets $ 3 $ 4