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Derivative Instruments and Hedging Activities (Detail) - USD ($)
$ in Millions
1 Months Ended
Jun. 30, 2018
Jun. 30, 2021
Dec. 31, 2020
Interest Rate Swap      
Derivative      
Derivative, term of contract 5 years    
Derivative, contract notional amount $ 500 $ 437 $ 456
Foreign Exchange Contract      
Derivative      
Derivative, contract notional amount   161 90
Net contract notional amount of foreign exchange forward contracts   $ 137 $ 29