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FAIR VALUE DISCLOSURES - Fair Value Measurement Reconciliation for All Levels (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Total gains and (losses), realized and unrealized, included in: |  |
Transfers into level 3 | $ 132 | $ 36
Transfers out of level 3 | (154) | (517)
Level 3 | Corporate |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | 2,158 | 2,121
Total gains and (losses), realized and unrealized, included in: |  |
Net investment income (loss) | 8 | 6
Investment gains (losses), net | (4) | (17)
Subtotal | 4 | (11)
Other comprehensive income (loss) | 20 | 50
Purchases | 906 | 594
Debt issuances | 0 |
Sales | (575) | (272)
Settlements | 0 | 0
Other | 0 | 0
Activity related to consolidated VIEs/VOEs | 0 | 0
Transfers into level 3 | 27 | 11
Transfers out of level 3 | (68) | (335)
Balance, end of period | 2,472 | 2,158
Change in unrealized gains or losses for the period included in earnings for instruments held at the end of the reporting period | 0 | 0
Change in unrealized gains or losses for the period included in other comprehensive income for instruments held at the end of the reporting period | 19 | 4
Level 3 | States and political subdivisions |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | 27 | 28
Total gains and (losses), realized and unrealized, included in: |  |
Net investment income (loss) | 0 | 0
Investment gains (losses), net | 0 | 0
Subtotal | 0 | 0
Other comprehensive income (loss) | 0 | 0
Purchases | 0 | 0
Debt issuances | 0 |
Sales | 0 | (1)
Settlements | 0 | 0
Other | 0 | 0
Activity related to consolidated VIEs/VOEs | 0 | 0
Transfers into level 3 | 0 | 0
Transfers out of level 3 | (27) | 0
Balance, end of period | 0 | 27
Change in unrealized gains or losses for the period included in earnings for instruments held at the end of the reporting period | 0 | 0
Change in unrealized gains or losses for the period included in other comprehensive income for instruments held at the end of the reporting period | 0 | 0
Level 3 | Asset-backed |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | 47 | 0
Total gains and (losses), realized and unrealized, included in: |  |
Net investment income (loss) | 1 | 0
Investment gains (losses), net | 0 | 0
Subtotal | 1 | 0
Other comprehensive income (loss) | 0 | 0
Purchases | 379 | 55
Debt issuances | 0 |
Sales | (181) | (8)
Settlements | 0 | 0
Other | 0 | 0
Activity related to consolidated VIEs/VOEs | 0 | 0
Transfers into level 3 | 0 | 0
Transfers out of level 3 | (14) | 0
Balance, end of period | 232 | 47
Change in unrealized gains or losses for the period included in earnings for instruments held at the end of the reporting period | 0 | 0
Change in unrealized gains or losses for the period included in other comprehensive income for instruments held at the end of the reporting period | 1 | 0
Level 3 | RMBS |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | 0 | 34
Total gains and (losses), realized and unrealized, included in: |  |
Net investment income (loss) |  | 0
Investment gains (losses), net |  | 0
Subtotal |  | 0
Other comprehensive income (loss) |  | 0
Purchases |  | 0
Sales |  | 0
Settlements |  | 0
Other |  | 0
Activity related to consolidated VIEs/VOEs |  | 0
Transfers into level 3 |  | 0
Transfers out of level 3 |  | (34)
Balance, end of period |  | 0
Change in unrealized gains or losses for the period included in earnings for instruments held at the end of the reporting period |  | 0
Change in unrealized gains or losses for the period included in other comprehensive income for instruments held at the end of the reporting period |  | 0
Level 3 | CMBS |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | 7 | 32
Total gains and (losses), realized and unrealized, included in: |  |
Net investment income (loss) | 0 | 0
Investment gains (losses), net | 0 | 0
Subtotal | 0 | 0
Other comprehensive income (loss) | 1 | (1)
Purchases | 0 | 3
Debt issuances | 0 |
Sales | 0 | 0
Settlements | 0 | 0
Other | 0 | 0
Activity related to consolidated VIEs/VOEs | 0 | 0
Transfers into level 3 | 0 | 0
Transfers out of level 3 | 0 | (27)
Balance, end of period | 8 | 7
Change in unrealized gains or losses for the period included in earnings for instruments held at the end of the reporting period | 0 | 0
Change in unrealized gains or losses for the period included in other comprehensive income for instruments held at the end of the reporting period | 1 | (1)
Level 3 | Fixed maturities, at FVO |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | 181 | 224
Total gains and (losses), realized and unrealized, included in: |  |
Net investment income (loss) | (23) | 6
Investment gains (losses), net | 1 | (1)
Subtotal | (22) | 5
Other comprehensive income (loss) | 0 | 0
Purchases | 163 | 95
Debt issuances | 0 |
Sales | (107) | (47)
Settlements | 0 | 0
Other | 0 | 0
Activity related to consolidated VIEs/VOEs | 0 | 0
Transfers into level 3 | 105 | 25
Transfers out of level 3 | (45) | (121)
Balance, end of period | 275 | 181
Change in unrealized gains or losses for the period included in earnings for instruments held at the end of the reporting period | 18 | 0
Change in unrealized gains or losses for the period included in other comprehensive income for instruments held at the end of the reporting period | 0 | 16
Level 3 | Other equity investments |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | 57 | 17
Total gains and (losses), realized and unrealized, included in: |  |
Net investment income (loss) | 1 | (2)
Investment gains (losses), net | 0 | 0
Subtotal | 1 | (2)
Other comprehensive income (loss) | 0 | 0
Purchases | 0 | 85
Debt issuances | 0 |
Sales | (2) | (42)
Settlements | 0 | 0
Other | 0 | 0
Activity related to consolidated VIEs/VOEs | (1) | (1)
Transfers into level 3 | 0 | 0
Transfers out of level 3 | 0 | 0
Balance, end of period | 55 | 57
Change in unrealized gains or losses for the period included in earnings for instruments held at the end of the reporting period | 1 | (2)
Change in unrealized gains or losses for the period included in other comprehensive income for instruments held at the end of the reporting period | 0 | 0
Level 3 | Trading Securities, at Fair Value |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | 61 | 55
Total gains and (losses), realized and unrealized, included in: |  |
Net investment income (loss) | 0 | 0
Investment gains (losses), net | 14 | 6
Subtotal | 14 | 6
Other comprehensive income (loss) | 0 | 0
Purchases | 5 | 0
Debt issuances | 0 |
Sales | 0 | 0
Settlements | 0 | 0
Other | 0 | 0
Activity related to consolidated VIEs/VOEs | 0 | 0
Transfers into level 3 | 0 | 0
Transfers out of level 3 | 0 | 0
Balance, end of period | 80 | 61
Change in unrealized gains or losses for the period included in earnings for instruments held at the end of the reporting period | 14 | 6
Change in unrealized gains or losses for the period included in other comprehensive income for instruments held at the end of the reporting period | 0 | 0
Level 3 | Notes issued by consolidated VIE’s |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | 0 |
Total gains and (losses), realized and unrealized, included in: |  |
Net investment income (loss) | 0 |
Investment gains (losses), net | 0 |
Subtotal | 0 |
Other comprehensive income (loss) | 0 |
Purchases | 0 |
Debt issuances | 188 |
Sales | 0 |
Settlements | (16) |
Other | 0 |
Activity related to consolidated VIEs/VOEs | 0 |
Transfers into level 3 | 0 |
Transfers out of level 3 | 0 |
Balance, end of period | 172 | 0
Change in unrealized gains or losses for the period included in earnings for instruments held at the end of the reporting period | 0 |
Change in unrealized gains or losses for the period included in other comprehensive income for instruments held at the end of the reporting period | 0 |
Level 3 | Separate Accounts Assets |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | 0 | 1
Total gains and (losses), realized and unrealized, included in: |  |
Net investment income (loss) |  | 0
Investment gains (losses), net |  | 0
Subtotal |  | 0
Other comprehensive income (loss) |  | 0
Purchases |  | 0
Sales |  | 0
Settlements |  | 0
Other |  | 0
Activity related to consolidated VIEs/VOEs |  | 0
Transfers into level 3 |  | 0
Transfers out of level 3 |  | (1)
Balance, end of period |  | 0
Change in unrealized gains or losses for the period included in earnings for instruments held at the end of the reporting period |  | 0
Change in unrealized gains or losses for the period included in other comprehensive income for instruments held at the end of the reporting period |  | 0
Level 3 | Contingent Payment Arrangement |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | (253) | (247)
Total gains and (losses), realized and unrealized, included in: |  |
Net investment income (loss) | 0 | 0
Investment gains (losses), net | 0 | 0
Subtotal | 0 | 0
Other comprehensive income (loss) | 0 | 0
Purchases | 0 | 0
Debt issuances | 0 |
Sales | 0 | 0
Settlements | 3 | 1
Other | 241 | (7)
Activity related to consolidated VIEs/VOEs | 0 | 0
Transfers into level 3 | 0 | 0
Transfers out of level 3 | 0 | 0
Balance, end of period | (9) | (253)
Change in unrealized gains or losses for the period included in earnings for instruments held at the end of the reporting period | 0 | 0
Change in unrealized gains or losses for the period included in other comprehensive income for instruments held at the end of the reporting period | $ 0 | $ 0

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