INVESTMENTS - Schedule of Components of Net Realized Capital Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Debt Securities, Available-for-Sale [Line Items]
Credit allowance on fixed maturity securities	$ 13	$ (1)
Gains (losses) from fair value adjustment on public equities	(7)	(2)
Total net realized gains (losses) from dispositions	(16)	(5)
Total net gains (losses) on investments	(10)	(7)
Fixed maturities
Debt Securities, Available-for-Sale [Line Items]
Fixed maturities	(16)	(4)
Equity securities
Debt Securities, Available-for-Sale [Line Items]
Fixed maturities	0	0
Other Invested Assets
Debt Securities, Available-for-Sale [Line Items]
Fixed maturities	0	0
Short-term investments
Debt Securities, Available-for-Sale [Line Items]
Fixed maturities	$ 0	$ 0

Investments, Allowance For (Reversal Of) Credit Loss

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Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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Amount of realized and unrealized gain (loss) on investment.

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Amount of realized gain (loss) on investment.

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Amount of unrealized gain (loss) on investment.

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