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Financial Instruments - Additional Information (Detail)
€ in Millions, $ in Millions
3 Months Ended 12 Months Ended
May 18, 2017
EUR (€)
Sep. 30, 2020
USD ($)
swap
Dec. 31, 2018
USD ($)
Mar. 31, 2016
USD ($)
Agreement
Mar. 31, 2016
EUR (€)
Agreement
Dec. 31, 2021
USD ($)
swap
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Sep. 30, 2019
swap
Derivatives, Fair Value [Line Items]                  
Proceeds from unwinding of cross currency swap derivative instruments           $ 0 $ 0 $ 26  
Payments for (Proceeds from) Hedge, Investing Activities           0 (14) $ 0  
Derivative Liability, Fair Value, Gross Liability           7 29    
Forward Currency Contracts [Member]                  
Derivatives, Fair Value [Line Items]                  
Derivative instruments outstanding           46 221    
Currency Swap [Member]                  
Derivatives, Fair Value [Line Items]                  
Derivative instruments outstanding           300 300    
Payments for (Proceeds from) Hedge, Investing Activities   $ 15              
Interest Receivable   $ 2              
Derivative Liability, Fair Value, Gross Liability           5 23    
Interest Rate Swap [Member]                  
Derivatives, Fair Value [Line Items]                  
Loss incurred on termination of interest rate swaps       $ 3 € 3        
Gain on deal contingent derivatives | € € 5                
Number of interest rate derivatives held | Agreement       2 2        
Fair Value of Derivatives Not Designated as Hedging Instrument [Member]                  
Derivatives, Fair Value [Line Items]                  
Derivative Liability, Fair Value, Gross Liability           2 0    
Fair Value of Derivatives Not Designated as Hedging Instrument [Member] | Currency Swap [Member]                  
Derivatives, Fair Value [Line Items]                  
Derivative Liability, Fair Value, Gross Liability           0 0    
Designated as Hedging Instrument [Member]                  
Derivatives, Fair Value [Line Items]                  
Derivative Liability, Fair Value, Gross Liability           $ 5 29    
Designated as Hedging Instrument [Member] | Currency Swap [Member]                  
Derivatives, Fair Value [Line Items]                  
Interest Income (Expense), Net     $ 8            
Number of Foreign Currency Derivatives Held | swap   2       2     4
Proceeds from unwinding of cross currency swap derivative instruments     $ 34            
Derivative Liability, Fair Value, Gross Liability           $ 5 $ 23    
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]                  
Derivatives, Fair Value [Line Items]                  
Derivative Liability, Fair Value, Gross Liability           $ 5