v3.26.3
Reinsurance - Schedule of Sources of Income Related to Funds Withheld Under Reinsurance Treaties (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Effects of Reinsurance [Line Items]        
Other investment expenses on funds withheld assets $ (93) $ (106) $ (259) $ (309)
Total net investment income 886 856 2,554 2,329
Funds Withheld Reinsurance Assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets 181 215 603 694
Other investment expenses on funds withheld assets (10) (12) (32) (37)
Total net investment income 171 203 571 657
Debt securities | Funds Withheld Reinsurance Assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets 77 92 246 286
Debt securities, at fair value under the fair value option | Funds Withheld Reinsurance Assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets (2) 0 (2) 1
Equity securities | Funds Withheld Reinsurance Assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets (2) 5 (3) 6
Mortgage loans | Funds Withheld Reinsurance Assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets 34 30 87 114
Mortgage loans, at fair value under the fair value option | Funds Withheld Reinsurance Assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets (1) (1) (2) 6
Policy loans | Funds Withheld Reinsurance Assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets 63 84 236 250
Limited partnerships | Funds Withheld Reinsurance Assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets 7 2 30 29
Other investment income | Funds Withheld Reinsurance Assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets $ 2 $ 2 $ 7 $ 9