INVESTMENTS - Schedule of Proceeds and Split Between Gross Gains and Losses, from Dispositions of Fixed Maturity Securities (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales of fixed maturity securities - available for sale	$ 127	$ 407
Gross gains from sales	5	11
Gross losses from sales	(9)	(18)
Proceeds from sales of fixed maturity securities - held to maturity	10	0
Gross gains from sales	0	0
Gross losses from sales	(1)	0
Proceeds from sales of equity securities	50	0
Gross gains from sales	0	1
Gross losses from sales	$ 0	$ 0

Debt Security, Held-To-Maturity, Sold, Realized Gain

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Debt Security, Held-To-Maturity, Sold, Realized Loss

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Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-9

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Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized gain from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
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-Publisher FASB
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Amount of realized loss from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
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-Paragraph 11
-Publisher FASB
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Amount of cash inflow from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as investing activity.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 230
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The cash inflow associated with the sale of securities that had been designated as held-to-maturity. Excludes proceeds from maturities, prepayments and calls by the issuer.

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