Derivatives and Currency Exchange Risk Management - (Gains) Losses Recognized in Income, Net Investment Hedges (Details) - Currency exchange rate contracts - Other operating expense, net - Net investment hedges - USD ($) $ in Millions	12 Months Ended
	Apr. 24, 2020	Apr. 26, 2019	Apr. 27, 2018
Derivative Instruments, (Gain) Loss [Line Items]
Recognized in Income, Net investment hedges	$ (9)
Recognized in Income, Net investment hedges		$ (12)	$ 0