Stockholders' Equity - Summary of Activities Related to Dividends on Common Stock (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Oct. 30, 2020	Oct. 25, 2019	Oct. 30, 2020	Oct. 25, 2019
Dividends, Common Stock [Abstract]
Dividends per share declared	$ 0.48	$ 0.48	$ 0.96	$ 0.96
Dividend payments			$ 214	$ 226
Additional Paid-in Capital
Dividends, Common Stock [Abstract]
Dividend payments			30	226
Retained Earnings
Dividends, Common Stock [Abstract]
Dividend payments			$ 184	$ 0