LEASES - Schedule of Operating Lease Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Leases [Abstract]
Lease income – operating leases	$ 261	$ 236	$ 772	$ 714
Variable lease income – operating leases	12	26	43	62
Rental income on operating leases	273	262	815	776
Interest income – sales type and direct financing leases	44	44	131	131
Variable lease income included in other noninterest income	14	15	44	46
Interest income – leveraged leases	1	1	3	3
Total lease income	$ 332	$ 322	$ 993	$ 956