LOANS, LEASES, AND ALLOWANCE FOR CREDIT LOSSES (Summary of Accrued Interest Receivables Reversed) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financing Receivable, Past Due [Line Items]
Accrued interest receivable written off	$ 7	$ 4	$ 17	$ 10
Commercial
Financing Receivable, Past Due [Line Items]
Accrued interest receivable written off	5	2	10	7
Commercial real estate
Financing Receivable, Past Due [Line Items]
Accrued interest receivable written off	1	2	4	2
Consumer
Financing Receivable, Past Due [Line Items]
Accrued interest receivable written off	$ 1	$ 0	$ 3	$ 1