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FAIR VALUE - Schedule of Activity Under Level 3, Fair Value Measurements Using Significant Unobservable Inputs by Asset Type (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
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 | 2,234,000,000 | $ 1,976,000,000 | 2,189,000,000 | $ 1,993,000,000
Total gains or (losses) (realized/unrealized) |  |  |  |
Included in earnings | (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
Included in other comprehensive income (loss) | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | 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 | $ 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 of fixed maturities | 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
Corporate securities | Market Value |  |  |  |
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 | (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)
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 of fixed maturities | 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
Asset-backed securities | Market Value |  |  |  |
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 | 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 of fixed maturities | 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
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 | 16,000,000 | 14,000,000 | 16,000,000
Total gains or (losses) (realized/unrealized) |  |  |  |
Included in earnings | 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 of fixed maturities | 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

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