v3.26.3
Accumulated Other Comprehensive Income (Loss) - Schedule of Amounts Reclassified Out of AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net unrealized gain (loss) $ 1,587 $ 1,132 $ 3,791 $ 2,649
Income tax expense (benefit) (130) 19 (155) 14
Reclassifications, net of income taxes (870) (91) (1,110) (258)
Reclassification out of Accumulated Other Comprehensive Income        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Income tax expense (benefit) 0 0 0 0
Reclassifications, net of income taxes 5 (5) 5 (8)
Reclassification out of Accumulated Other Comprehensive Income | Net unrealized gain (loss)        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net unrealized gain (loss) 5 (5) 5 (8)
Reclassification out of Accumulated Other Comprehensive Income | Net realized gain (loss) on investments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net unrealized gain (loss) 29 8 60 53
Reclassification out of Accumulated Other Comprehensive Income | Other impaired securities        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net unrealized gain (loss) $ (24) $ (13) $ (55) $ (61)