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INVESTMENTS - Summary of Components of Net Realized Capital Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Securities, Available-for-Sale [Line Items]
Total net gains (losses) on investments	$ 5	$ (236)	$ 10	$ (390)
Fixed maturities | Market Value
Debt Securities, Available-for-Sale [Line Items]
Allowance for credit losses	0	(1)	(8)	(13)
Net gains (losses on investments	(3)	(16)	(1)	(13)
Equity securities | Fair Value
Debt Securities, Available-for-Sale [Line Items]
Net gains (losses on investments	0	(31)	7	(43)
Gains (losses) from fair value adjustments	8	(189)	12	(326)
Other invested assets
Debt Securities, Available-for-Sale [Line Items]
Net gains (losses on investments	$ 0	$ 1	$ 0	$ 5

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