FAIR VALUE OF FINANCIAL INSTRUMENTS - Narrative (Details) - Level 3 - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unrealized appreciation (depreciation) on investments	$ 110	$ (179)	$ 110	$ (179)
Net unrealized gains (losses)	$ 215	$ (197)	$ 354	$ (302)

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-22

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant