v3.26.1
Reinsurance - Schedule of Sources of Income Related to Funds Withheld Under Reinsurance Treaties (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Effects of Reinsurance [Line Items]        
Other investment expenses on funds withheld assets $ (103) $ (109) $ (166) $ (203)
Total net investment income 928 718 1,668 1,473
Funds withheld assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets 212 239 422 479
Other investment expenses on funds withheld assets (11) (12) (22) (25)
Total net investment income 201 227 400 454
Debt Securities | Funds withheld assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets 82 94 169 194
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 0 0 1
Equity securities | Funds withheld assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets 0 1 (1) 1
Mortgage loans | Funds withheld assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets 27 41 53 84
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 (3) 3 (1) 7
Policy loans | Funds withheld assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets 86 83 173 166
Limited partnerships | Funds withheld assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets 15 17 23 27
Other investment income | Funds withheld assets        
Effects of Reinsurance [Line Items]        
Total investment income on funds withheld assets $ 2 $ 3 $ 5 $ 7