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FAIR VALUE DISCLOSURES - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2023 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Fair Value Inputs Assets Quantitative Information 1 [Line Items] |  |  |  |
Fair value adjustments on purchased MRB asset | $ 1,100 | $ 1,100 |  |
AFS fixed maturities transferred from Level 3 to Level 2 |  | 495 | $ 184 |
Transfers into level 3 |  | $ 118 | $ 250 |
Fair value measurement with unobservable inputs reconciliation recurring basis asset transfers percentage |  | 11.70% | 6.10% |
Level 3 | Nonrecurring |  |  |  |
Fair Value Inputs Assets Quantitative Information 1 [Line Items] |  |  |  |
Investments, fair value disclosure |  | $ 1,000 |  | $ 1,000

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