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Derivative Financial Instruments - Additional Information (Detail) - USD ($)
3 Months Ended
Jan. 21, 2020
Mar. 31, 2020
May 08, 2018
Reclassification out of AOCI [Member]      
Derivative [Line Items]      
Recognized unrealized losses in AOCI reclassified to interest expense   $ 20,000,000  
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]      
Derivative [Line Items]      
Fair value of swap arrangement in net liability position   39,000,000  
Derivative, fair value, net $ 47,000,000    
Term Facility [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]      
Derivative [Line Items]      
Notional value of outstanding derivative contracts   500,000,000 $ 1,900,000,000
Decrease in notional amount $ 1,400,000,000    
Foreign Exchange Rate [Member]      
Derivative [Line Items]      
Notional value of outstanding derivative contracts   $ 682,000,000  
Derivative contracts, maturity date   Sep. 30, 2023  
Fair value of derivative contracts   $ 55,000,000  
Unrealized net gain (loss) on derivative financial instruments   (54,000,000)  
Net deferred losses expected to be reclassified from AOCI over next 12 months   $ (22,000,000)