DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Effect of Cash Flow Hedging on Income Statement (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Interest Income - Loans and Leases	$ 1,754,000,000	$ 1,117,000,000	$ 886,000,000
Interest Expense - Short-Term Borrowings	78,000,000	25,000,000	27,000,000
Interest rate contracts
Derivative [Line Items]
Amount of gain (loss) reclassified from AOCI into net income	0	0
Interest rate contracts | Interest Income - Loans and Leases
Derivative [Line Items]
Amount of gain (loss) reclassified from AOCI into net income	(46,000,000)	(8,000,000)	2,000,000
Interest rate contracts | Interest Expense - Short-Term Borrowings
Derivative [Line Items]
Amount of gain (loss) reclassified from AOCI into net income	$ 22,000,000	$ (3,000,000)	$ (20,000,000)