LOANS AND LEASES - Loans Held For Sale (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale at fair value	$ 935	$ 825
Other loans held for sale	1,158	33
Total loans held for sale	2,093	858
Residential Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale at fair value	766	633
Other loans held for sale	0	0
Total loans held for sale	766	633
Other Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale at fair value	0
Other loans held for sale	979
Total loans held for sale	979
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale at fair value	169	192
Other loans held for sale	179	33
Total loans held for sale	$ 348	$ 225