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Derivatives - Summary of Fair Values of Derivative Instruments Designated as Hedges (Detail) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Derivatives Fair Value [Line Items]    
Derivative asset fair value   $ 9,000,000
Derivative liability fair value $ 40,000,000 17,000,000
Designated as Hedging Instrument [Member] | Other Current Assets and Liabilities [Member] | Foreign Exchange Forward Contracts [Member]    
Derivatives Fair Value [Line Items]    
Derivative asset fair value   5,000,000
Derivative liability fair value 4,000,000 3,000,000
Derivative notional amount 132,000,000 202,000,000
Designated as Hedging Instrument [Member] | Other Assets and Liabilities [Member] | Interest Rate Swaps [Member]    
Derivatives Fair Value [Line Items]    
Derivative asset fair value   3,000,000
Derivative liability fair value 33,000,000 9,000,000
Derivative notional amount 875,000,000 890,000,000
Designated as Hedging Instrument [Member] | Deposits and Other Assets [Member] | Interest Rate Cap [Member]    
Derivatives Fair Value [Line Items]    
Derivative asset fair value   1,000,000
Derivative notional amount   700,000,000
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest Rate Swaps [Member]    
Derivatives Fair Value [Line Items]    
Derivative liability fair value 3,000,000 5,000,000
Derivative notional amount $ 317,000,000 $ 432,000,000