v3.25.2
Fair Value - Reconciliations of Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Corporate bonds and other        
Reconciliations for All Assets and Liabilities [Roll Forward]        
Balance at beginning of period $ 1,351 $ 1,082 $ 1,278 $ 1,045
Included in Net Income 1 1
Included in OCI 16 (8) 37 (20)
Purchases 44 72 99 146
Sales
Settlements (24) (17) (42) (53)
Transfers into Level 3 15 11
Transfers out of Level 3
Balance at ending of period 1,388 1,129 1,388 1,129
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities 16 (8) 37 (22)
States, municipalities and political subdivisions        
Reconciliations for All Assets and Liabilities [Roll Forward]        
Balance at beginning of period 44 43 42 44
Included in Net Income
Included in OCI 2 (1)
Purchases
Sales
Settlements
Transfers into Level 3
Transfers out of Level 3
Balance at ending of period 44 43 44 43
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities 2 (1)
Asset-backed        
Reconciliations for All Assets and Liabilities [Roll Forward]        
Balance at beginning of period 889 871 876 901
Included in Net Income 1 2 5 4
Included in OCI (4) (11) (3) (16)
Purchases 22 55 49 73
Sales (5) (14)
Settlements (22) (25) (41) (42)
Transfers into Level 3
Transfers out of Level 3 (19)
Balance at ending of period 886 887 886 887
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities (4) (11) (3) (16)
Fixed maturities available-for-sale        
Reconciliations for All Assets and Liabilities [Roll Forward]        
Balance at beginning of period 2,284 1,996 2,196 1,990
Included in Net Income 2 2 6 4
Included in OCI 12 (19) 36 (37)
Purchases 66 127 148 219
Sales 0 (5) 0 (14)
Settlements (46) (42) (83) (95)
Transfers into Level 3 0 0 15 11
Transfers out of Level 3 0 0 0 (19)
Balance at ending of period 2,318 2,059 2,318 2,059
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities 0 0 0 0
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities 12 (19) 36 (39)
Equity securities        
Reconciliations for All Assets and Liabilities [Roll Forward]        
Balance at beginning of period 17 11 20 24
Included in Net Income 1 6
Included in OCI
Purchases 3 3
Sales (7) (7) (19)
Settlements (4)
Transfers into Level 3
Transfers out of Level 3
Balance at ending of period 10 14 10 14
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities (1) (1) 2
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities