LOANS AND LEASES - Loans Held For Sale (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale, at fair value	$ 774	$ 2,733
Other loans held for sale	208	735
Retail | Residential loans held for sale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale, at fair value	666	2,657
Other loans held for sale	0	0
Commercial | Commercial loans held for sale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale, at fair value	108	76
Other loans held for sale	$ 208	$ 735