VARIABLE INTEREST ENTITIES - Schedule of Consolidated Variable Interest Entities (Details) - USD ($) $ in Millions		Jun. 30, 2025	Dec. 31, 2024
ASSETS:
Interest-bearing deposits in banks	[1]	$ 680	$ 635
Net loans and leases	[1]	137,296	137,142
Other assets	[1]	13,331	13,941
TOTAL ASSETS		218,310	217,521
LIABILITIES:
Long-term borrowed funds	[1]	12,526	12,401
Other liabilities	[1]	4,449	4,870
TOTAL LIABILITIES		193,076	193,267
Variable Interest Entity, Primary Beneficiary
ASSETS:
Interest-bearing deposits in banks		173	209
Net loans and leases		2,815	3,843
Other assets		20	21
TOTAL ASSETS		3,008	4,073
LIABILITIES:
Long-term borrowed funds		2,411	3,375
Other liabilities		6	8
TOTAL LIABILITIES		$ 2,417	$ 3,383

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