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FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Fair Value Assets Measured on Recurring Basis (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2024 | Mar. 31, 2024
Policyholders’ account balances – embedded derivative |  |  |  |
Liabilities |  |  |  |
Beginning balance | $ (948) | $ (1,123) | $ (904) | $ (872)
Acquisition from business combination |  |  | 0 |
Derecognition |  |  | 0 |
Fair value changes in net income | (242) | 268 | (287) | (38)
Fair value changes in other comprehensive income | 0 | 0 | 0 | 0
Purchases | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Settlements or maturities | 0 | 0 | 30 | 0
Premiums less benefits | (1) | (93) | (35) | 6
Transfers into Level 3 | (5,066) | 0 | 0 |
Transfers out of Level 3 | 0 | 0 | 0 |
Ending balance | (6,257) | (948) | (1,196) | (904)
Funds withheld for reinsurance liabilities – embedded derivative |  |  |  |
Liabilities |  |  |  |
Funds withheld for reinsurance liabilities – embedded derivative, beginning balance | (55) | (37) | 1 | 0
Acquisition from business combination |  |  | 0 |
Derecognition |  |  | 0 |
Fair value changes in net income | (8) | (18) | (35) | 1
Fair value changes in other comprehensive income | 0 | 0 | 0 | 0
Purchases | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Settlements or maturities | 0 | 0 | 0 | 0
Premiums less benefits | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 | 0 | 0 |
Transfers out of Level 3 | 0 | 0 | 0 |
Funds withheld for reinsurance liabilities – embedded derivative, ending balance | $ (63) | $ (55) | $ (34) | $ 1
Invested assets |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
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 | Other Comprehensive Income (Loss), Net of Tax | Other Comprehensive Income (Loss), Net of Tax | Other Comprehensive Income (Loss), Net of Tax
Assets |  |  |  |
Beginning balance | $ 10,809 | $ 10,093 | $ 4,575 | $ 4,447
Acquisition from business combination |  |  | 4,288 |
Derecognition |  |  | 0 |
Fair value changes in net income | 26 | (32) | 162 | (5)
Fair value changes in other comprehensive income | (11) | 20 | 19 | 8
Purchases | 1,214 | 172 | 1,234 | 2,187
Sales | (1,537) | (45) | (1,260) | (2,056)
Settlements or maturities | (138) | (13) | (3) | (6)
Premiums less benefits | 0 | 0 | 0 | 0
Transfers into Level 3 | 239 | 681 | 64 |
Transfers out of Level 3 | (1,024) | (67) | (58) |
Ending balance | 9,578 | 10,809 | 9,021 | 4,575
Derivative assets |  |  |  |
Assets |  |  |  |
Beginning balance | 149 | 223 | 257 | 227
Acquisition from business combination |  |  | 0 |
Derecognition |  |  | 0 |
Fair value changes in net income | 66 | (38) | 24 | 57
Fair value changes in other comprehensive income | 0 | 0 | 0 | 0
Purchases | 34 | 33 | 39 | 35
Sales | 0 | 0 | 0 | 0
Settlements or maturities | (61) | (69) | (66) | (62)
Premiums less benefits | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 | 0 | 0 |
Transfers out of Level 3 | 0 | 0 | 0 |
Ending balance | 188 | 149 | 254 | 257
Reinsurance funds withheld – embedded derivative |  |  |  |
Assets |  |  |  |
Beginning balance | 8 | 18 | 89 | (46)
Acquisition from business combination |  |  | 0 |
Derecognition |  |  | (196) |
Fair value changes in net income | (2) | (10) | 141 | 135
Fair value changes in other comprehensive income | 0 | 0 | 0 | 0
Purchases | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Settlements or maturities | 0 | 0 | 0 | 0
Premiums less benefits | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 | 0 | 0 |
Transfers out of Level 3 | 0 | 0 | 0 |
Ending balance | $ 6 | $ 8 | $ 34 | $ 89

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