Net Income per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jan. 29, 2021	Jan. 24, 2020	Jan. 29, 2021	Jan. 24, 2020
Net income per share:
Net income	$ 182	$ 277	$ 396	$ 623
Shares used in basic computation	223	226	222	233
Dilutive impact of employee equity award plans	4	3	3	3
Shares used in diluted computation	227	229	225	236
Basic	$ 0.82	$ 1.23	$ 1.78	$ 2.67
Diluted	$ 0.80	$ 1.21	$ 1.76	$ 2.64