The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Effect of Cash Flow Hedging on Income Statement (Detail) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative [Line Items]
Loans and leases, including fees	$ 274	$ 260	$ 819	$ 757
Short-term borrowings	$ 18	$ 20	66	54
Interest rate contracts [Member]
Derivative [Line Items]
Amount of gain (loss) reclassified from AOCI into net income			0
Amount of Gain (Loss) Reclassified from AOCI into Income				0
Interest Income - Loans and Leases [Member] \| Interest rate contracts [Member]
Derivative [Line Items]
Amount of gain (loss) reclassified from AOCI into net income			(1)
Amount of Gain (Loss) Reclassified from AOCI into Income				0
Amount of gain (loss) reclassified from AOCI into income as a result of that a forecasted transaction is no longer probable of occurring			0	0
Interest Expense - Short-Term Borrowings [Member] \| Interest rate contracts [Member]
Derivative [Line Items]
Amount of gain (loss) reclassified from AOCI into net income			3
Amount of Gain (Loss) Reclassified from AOCI into Income				2
Amount of gain (loss) reclassified from AOCI into income as a result of that a forecasted transaction is no longer probable of occurring			$ 0	$ 0