Derivatives and Currency Exchange Risk Management - Derivative (Gains) Losses Not Designated as Hedging Instruments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 30, 2020	Oct. 25, 2019	Oct. 30, 2020	Oct. 25, 2019
Derivative Instruments, (Gain) Loss [Line Items]
Total	$ (3)	$ (11)	$ 97	$ (10)
Other operating expense, net | Currency exchange rate contracts
Derivative Instruments, (Gain) Loss [Line Items]
Total	(2)	(12)	125	(6)
Other operating expense, net | Total return swaps
Derivative Instruments, (Gain) Loss [Line Items]
Total	$ (1)	$ 1	$ (28)	$ (4)