v3.26.1
Accumulated Other Comprehensive Income (Loss) - Schedule of Amounts Reclassified Out of AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net unrealized gain (loss) $ 2,487 $ 2,860 $ 2,204 $ 1,517
Income tax expense (benefit) (5) (4) (25) (5)
Reclassifications, net of income taxes (660) (185) (240) (167)
Reclassification out of Accumulated Other Comprehensive Income        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Income tax expense (benefit) 0 (2) 0 0
Reclassifications, net of income taxes 6 (10) 0 (3)
Reclassification out of Accumulated Other Comprehensive Income | Net unrealized gain (loss)        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net unrealized gain (loss) 6 (12) 0 (3)
Reclassification out of Accumulated Other Comprehensive Income | Net realized gain (loss) on investments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net unrealized gain (loss) 13 21 31 45
Reclassification out of Accumulated Other Comprehensive Income | Other impaired securities        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net unrealized gain (loss) $ (7) $ (33) $ (31) $ (48)