VARIABLE INTEREST ENTITIES - Schedule of Consolidated Variable Interest Entities (Details) - USD ($) $ in Millions		Mar. 31, 2025	Dec. 31, 2024
ASSETS:
Interest-bearing deposits in banks	[1]	$ 685	$ 635
Net loans and leases	[1]	135,621	137,142
Other assets	[1]	13,479	13,941
TOTAL ASSETS		220,148	217,521
LIABILITIES:
Long-term borrowed funds	[1]	12,267	12,401
Other liabilities	[1]	4,509	4,870
TOTAL LIABILITIES		195,282	193,267
Variable Interest Entity, Primary Beneficiary
ASSETS:
Interest-bearing deposits in banks		197	209
Net loans and leases		3,313	3,843
Other assets		21	21
TOTAL ASSETS		3,531	4,073
LIABILITIES:
Long-term borrowed funds		2,885	3,375
Other liabilities		7	8
TOTAL LIABILITIES		$ 2,892	$ 3,383

[1] Includes amounts in consolidated VIEs. See Note 6 for additional information.