INVESTMENT SECURITIES - Net (Purchases) Dispositions of Investment Securities (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Purchases of investment securities	$ (4,046)	$ (4,286)
Dispositions and maturities of investment securities	3,170	2,997
Net (purchases) dispositions of insurance investment securities	$ (876)	$ (1,290)	$ (1,352)

Amount of cash outflow for purchase of marketable security.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 11
-URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26853-111562

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration