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INVESTMENTS - Schedule of Components of Net Realized Capital Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Debt Securities, Available-for-Sale [Line Items]
Net gains (losses) on investments	$ (47)	$ (27)	$ (59)	$ (50)
Fixed maturity securities | Market Value
Debt Securities, Available-for-Sale [Line Items]
Allowance for credit losses	(12)	(9)	(14)	(3)
Fixed maturity securities | Fair Value
Debt Securities, Available-for-Sale [Line Items]
Net realized gains (losses) from dispositions	(36)	(25)	(48)	(47)
Equity securities, fair value | Market Value
Debt Securities, Available-for-Sale [Line Items]
Gains (losses) from fair value adjustments	0	5	3	(3)
Equity securities, fair value | Fair Value
Debt Securities, Available-for-Sale [Line Items]
Net realized gains (losses) from dispositions	0	0	(1)	1
Other invested assets
Debt Securities, Available-for-Sale [Line Items]
Net realized gains (losses) from dispositions	0	1	0	0
Short-term investments gain (loss)
Debt Securities, Available-for-Sale [Line Items]
Net realized gains (losses) from dispositions	$ 0	$ 1	$ 0	$ 1

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