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DERIVATIVE INSTRUMENTS - Schedule of Derivative Instruments, Gain (Loss) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Gains (losses) on derivatives not designated as hedging instruments | $ 289 | $ 85 | $ 386 | $ 121
Modco arrangement | Net investment results from reinsurance funds withheld |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Gains (losses) on derivatives not designated as hedging instruments | 141 | 27 | 276 | (10)
Indexed annuity and variable annuity product | Change in fair value of insurance-related derivatives and embedded derivatives |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Gains (losses) on derivatives not designated as hedging instruments | (237) | (39) | (294) | (134)
Funds withheld arrangement |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Gains (losses) on derivatives not designated as hedging instruments | (131) | (12) | (52) | (144)
Funds withheld arrangement | Change in fair value of insurance-related derivatives and embedded derivatives |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Gains (losses) on derivatives not designated as hedging instruments | $ (35) | $ 0 | $ (34) | $ 0

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