VARIABLE INTEREST ENTITIES - Schedule of Consolidated Variable Interest Entities (Details) - USD ($) $ in Millions		Jun. 30, 2024	Dec. 31, 2023
ASSETS:
Cash and due from banks	[1]	$ 1,191	$ 1,794
Interest-bearing deposits in banks	[1]	559	405
Net loans and leases	[1]	139,717	143,861
Other assets	[1]	13,494	13,359
TOTAL ASSETS		219,938	221,964
LIABILITIES:
Long-term borrowed funds	[1]	13,082	13,467
Other liabilities	[1]	5,086	4,746
TOTAL LIABILITIES		196,069	197,622
Variable Interest Entity, Primary Beneficiary
ASSETS:
Cash and due from banks		0	13
Interest-bearing deposits in banks		209	106
Net loans and leases		5,034	3,194
Other assets		24	14
TOTAL ASSETS		5,267	3,327
LIABILITIES:
Long-term borrowed funds		4,190	2,692
Other liabilities		11	8
TOTAL LIABILITIES		$ 4,201	$ 2,700

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