v3.25.2
FAIR VALUE - Schedule of Activity Under Level 3, Fair Value Measurements Using Significant Unobservable Inputs for Fixed Maturities - Available for Sale (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Transfers in/(out) of Level 3 and reclassification of securities in/(out) of investment categories $ 0   $ 0  
Market Value        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning balance of fixed maturities 2,234,000,000 $ 1,976,000,000 2,189,000,000 $ 1,993,000,000
Total gains or (losses) (realized/unrealized) included in earnings (or changes in net assets) (1,000,000) 5,000,000 (1,000,000) 6,000,000
Included in other comprehensive income (loss) (12,000,000) 2,000,000 (17,000,000) 9,000,000
Purchases, issuances and settlements 91,000,000 62,000,000 140,000,000 37,000,000
Transfers in/(out) of Level 3 and reclassification of securities in/(out) of investment categories 0 0 0 0
Ending balance 2,312,000,000 2,045,000,000 2,312,000,000 2,045,000,000
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date (2,000,000) 3,000,000 (2,000,000) 4,000,000
Market Value | Corporate Securities        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning balance of fixed maturities 468,000,000 620,000,000 518,000,000 672,000,000
Total gains or (losses) (realized/unrealized) included in earnings (or changes in net assets) (1,000,000) 5,000,000 (1,000,000) 6,000,000
Included in other comprehensive income (loss) $ (8,000,000) $ (1,000,000) $ (15,000,000) $ (1,000,000)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Net increase (decrease) during the period Net increase (decrease) during the period Net increase (decrease) during the period Net increase (decrease) during the period
Purchases, issuances and settlements $ (22,000,000) $ (35,000,000) $ (67,000,000) $ (88,000,000)
Transfers in/(out) of Level 3 and reclassification of securities in/(out) of investment categories 0 0 0 0
Ending balance 436,000,000 589,000,000 436,000,000 589,000,000
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date (2,000,000) 3,000,000 (2,000,000) 4,000,000
Market Value | Asset Backed Securities        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning balance of fixed maturities 1,752,000,000 1,340,000,000 1,657,000,000 1,305,000,000
Total gains or (losses) (realized/unrealized) included in earnings (or changes in net assets) 0 0 0 0
Included in other comprehensive income (loss) (3,000,000) 3,000,000 (2,000,000) 10,000,000
Purchases, issuances and settlements 114,000,000 99,000,000 207,000,000 126,000,000
Transfers in/(out) of Level 3 and reclassification of securities in/(out) of investment categories 0 0 0 0
Ending balance 1,862,000,000 1,442,000,000 1,862,000,000 1,442,000,000
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date 0 0 0 0
Market Value | Foreign Corporate        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning balance of fixed maturities 14,000,000 16,000,000 14,000,000 16,000,000
Total gains or (losses) (realized/unrealized) included in earnings (or changes in net assets) 0 0 0 0
Included in other comprehensive income (loss) 0 0 0 0
Purchases, issuances and settlements 0 (2,000,000) 0 (2,000,000)
Transfers in/(out) of Level 3 and reclassification of securities in/(out) of investment categories 0 0 0 0
Ending balance 14,000,000 14,000,000 14,000,000 14,000,000
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date $ 0 $ 0 $ 0 $ 0