FAIR VALUE OF ASSETS AND LIABILITIES - Changes in Fair Value of Insurance Contracts (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
Sep. 30, 2023	Dec. 31, 2022
Insurance Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of insurance contracts, liabilities	$ (972)	$ (8,065)
Insurance Liabilities \| Retained Business
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of insurance contracts, liabilities	(399)	(421)
Insurance Liabilities \| Ceded Business
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of insurance contracts, liabilities	(573)	(7,644)
Reinsurance recoverables
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of insurance contracts, assets	(56)	(15)
Reinsurance recoverables \| Retained Business
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of insurance contracts, assets	0	0
Reinsurance recoverables \| Ceded Business
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of insurance contracts, assets	(56)	(15)
Modified coinsurance receivable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of insurance contracts, assets	(338)	(5,640)
Modified coinsurance receivable \| Retained Business
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of insurance contracts, assets	0	0
Modified coinsurance receivable \| Ceded Business
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of insurance contracts, assets	(338)	(5,640)
Deposit asset
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of insurance contracts, assets	(177)	(1,989)
Deposit asset \| Retained Business
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of insurance contracts, assets	0	0
Deposit asset \| Ceded Business
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of insurance contracts, assets	$ (177)	$ (1,989)

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- Definition

Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

+ References

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

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- Definition

Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

+ References

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