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FAIR VALUE OF FINANCIAL INSTRUMENTS - Narrative (Details) - Level 3 - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unrealized appreciation (depreciation) on investments	$ 345	$ (212)
Net unrealized gains (losses)	$ 118	$ 59

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

This element represents the net excess or deficiency of the fair value of an investment (security, contract) over or under its cost (face amount, notional amount), respectively, which excess value or deficiency has not been recognized in earnings of the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
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-Publisher FASB
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- Definition

Amount, after tax, of unrealized gain (loss) on investment, derivative, and foreign currency transaction, classified as operating. Investment includes, but is not limited to, debt and equity securities, security sold short, real estate, and commodity.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section 45
-Paragraph 6
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(1)(c))
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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-Name Accounting Standards Codification
-Section 45
-Paragraph 37
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-Publisher FASB
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