LOANS AND LEASES - Non-Performing Assets (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 88	$ 88
Non-Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	88	88
Total non-performing loans and leases	88	88
Other real estate owned	6	8
Total non-performing assets	$ 94	$ 96
Non-performing loans and leases / total loans and leases	0.30%	0.35%
Non-performing assets + 90 days past due / total loans and leases + OREO	0.36%	0.41%
Past due	90 days	90 days