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FAIR VALUE DISCLOSURES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2023	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Fair Value Inputs Assets Quantitative Information 1 [Line Items]
Fair value adjustments on purchased MRB asset	$ 1,100	$ 1,100
AFS fixed maturities transferred from Level 3 to Level 2		495	$ 184
Transfers into level 3		$ 118	$ 250
Fair value measurement with unobservable inputs reconciliation recurring basis asset transfers percentage		11.70%	6.10%
Level 3 | Nonrecurring
Fair Value Inputs Assets Quantitative Information 1 [Line Items]
Investments, fair value disclosure		$ 1,000		$ 1,000

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Percentage of transfers into assets measured at fair value that have taken place during the period.

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Amount of addition (reduction) to the amount at which an asset could be incurred (settled) in a current transaction between willing parties.

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Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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