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INVESTMENTS - Schedule of Components of Net Realized Capital Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Total net gains (losses) on investments	$ (7)	$ 5
Fixed maturities
Debt Securities, Available-for-Sale [Line Items]
Allowance for credit losses	2	(8)
Fixed maturities | Market Value
Debt Securities, Available-for-Sale [Line Items]
Net realized gains (losses) from dispositions	(7)	2
Equity securities | Fair Value
Debt Securities, Available-for-Sale [Line Items]
Net realized gains (losses) from dispositions	1	7
Gains (losses) from fair value adjustments	(2)	4
Other invested assets
Debt Securities, Available-for-Sale [Line Items]
Net realized gains (losses) from dispositions	0	0
Short-term investments gain (loss)
Debt Securities, Available-for-Sale [Line Items]
Net realized gains (losses) from dispositions	$ 0	$ 0

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