INVESTMENT SECURITIES - Schedule of Realized Losses From Available-for-sale Securities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Investments [Abstract]
Gross realized gains on sales of investment securities available for sale	$ 0	$ 0	$ 0	$ 0
Gross realized losses on sales of investment securities available for sale	0	(12)	0	(26)
Net realized losses on sales of investment securities available for sale	$ 0	$ (12)	$ 0	$ (26)