Net Income per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Apr. 30, 2021	Apr. 24, 2020	Apr. 26, 2019
Net income per share:
Net income	$ 730	$ 819	$ 1,169
Shares used in basic computation	222	230	254
Dilutive impact of employee equity award plans	4	3	5
Shares used in diluted computation	226	233	259
Basic	$ 3.29	$ 3.56	$ 4.60
Diluted	$ 3.23	$ 3.52	$ 4.51