INVESTMENT SECURITIES - Gains (Losses) on Equity Securities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Net (losses) gains recognized on equity securities during the period	$ (123)	$ (341)	$ 746
Less: Net losses recognized on equity securities sold during the period	(105)	(13)	0
Unrealized (losses) gains recognized on equity securities still held at the end of the period	$ (18)	$ (328)	$ 746