LOANS AND LEASES - Loans Held For Sale (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale at fair value	$ 1,065	$ 825
Other loans held for sale	133	33
Total loans held for sale	1,198	858
Residential Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale at fair value	895	633
Other loans held for sale	0	0
Total loans held for sale	895	633
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale at fair value	170	192
Other loans held for sale	133	33
Total loans held for sale	$ 303	$ 225