LEASES - Schedule of Operating Lease Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Leases [Abstract]
Lease income – Operating leases	$ 254	$ 237
Variable lease income – Operating leases	16	18
Rental income on operating leases	270	255
Interest income – sales type and direct financing leases	43	43
Variable lease income included in other noninterest income	14	16
Interest income – leveraged leases	1	1
Total lease income	$ 328	$ 315