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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
Mar. 31, 2019
Mar. 31, 2018
Derivative [Line Items]    
Loans and leases, including fees $ 269 $ 239
Short-term borrowings 26 15
Interest Income - Loans and Leases [Member] | Interest rate contracts [Member]    
Derivative [Line Items]    
Amount of gain (loss) reclassified from AOCI into net income 0 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 1 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