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Derivatives and Hedging Activities - Schedule of Derivative Instruments Not Designated as Cash Flow Hedges (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jan. 29, 2021
Jan. 24, 2020
Jan. 29, 2021
Jan. 24, 2020
Foreign Exchange Forward Contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Foreign currency exchange contracts $ 8 $ 5 $ 26 $ 2