v3.26.1
FAIR VALUE - Schedule of Activity Under Level 3, Fair Value Measurements Using Significant Unobservable Inputs by Asset Type (Details) - USD ($)
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Total gains or (losses) (realized/unrealized)    
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 2,474,000,000 2,189,000,000
Total gains or (losses) (realized/unrealized)    
Included in earnings (2,000,000) 0
Included in other comprehensive income (loss) $ (2,000,000) $ (5,000,000)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Purchases, issuances and settlements $ 97,000,000 $ 49,000,000
Transfers in/(out) of Level 3 and reclassification of securities in/(out) of investment categories 0 0
Ending balance of fixed maturities 2,568,000,000 2,234,000,000
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 (1,000,000) 0
Corporate securities | Market Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance of fixed maturities 370,000,000 518,000,000
Total gains or (losses) (realized/unrealized)    
Included in earnings (2,000,000) 0
Included in other comprehensive income (loss) 2,000,000 (6,000,000)
Purchases, issuances and settlements (6,000,000) (45,000,000)
Transfers in/(out) of Level 3 and reclassification of securities in/(out) of investment categories 0 0
Ending balance of fixed maturities 364,000,000 468,000,000
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 (1,000,000) 0
Asset-backed securities | Market Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance of fixed maturities 2,091,000,000 1,657,000,000
Total gains or (losses) (realized/unrealized)    
Included in earnings 0 0
Included in other comprehensive income (loss) (4,000,000) 1,000,000
Purchases, issuances and settlements 103,000,000 94,000,000
Transfers in/(out) of Level 3 and reclassification of securities in/(out) of investment categories 0 0
Ending balance of fixed maturities 2,190,000,000 1,752,000,000
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
Foreign corporate securities | Market Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance of fixed maturities 14,000,000 14,000,000
Total gains or (losses) (realized/unrealized)    
Included in earnings 0 0
Included in other comprehensive income (loss) 0 0
Purchases, issuances and settlements 0 0
Transfers in/(out) of Level 3 and reclassification of securities in/(out) of investment categories 0 0
Ending balance of fixed maturities 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