Derivatives and Currency Exchange Risk Management - Amount of (Gains) Losses Recognized in Consolidated Statements of Income, Cash Flow Hedges (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 30, 2020	Oct. 25, 2019	Oct. 30, 2020	Oct. 25, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Other operating expense, net	$ 149	$ 149	$ 35	$ 127
Cash flow hedging | Currency exchange rate contracts | Other operating expense, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain reclassified from AOCI into income	$ (2)	$ (68)	$ (55)	$ (125)