DERIVATIVES AND HEDGING ACTIVITIES - Schedule of the Components of AOCI Related to Hedging Activities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 7,187	$ 7,017	$ 6,956	$ 7,293
Total other comprehensive loss, net of tax	(1)	(1)	(4)	(2)
Balance at end of period	6,574	6,954	6,574	6,954
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(3)	0	0	0
Other comprehensive loss before reclassifications, net of tax	(1)	0	(4)	0
Reclassification adjustment for net losses included in net interest revenues, net of tax	0	0	0	0
Total other comprehensive loss, net of tax	(1)	0	(4)	0
Balance at end of period	$ (4)	$ 0	$ (4)	$ 0