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		6 Months Ended
	Oct. 28, 2016	Oct. 30, 2015	Oct. 28, 2016	Oct. 30, 2015
Net income per share:
Net income	$ 109	$ 114	$ 173	$ 84
Shares used in basic computation	278	294	278	299
Dilutive impact of employee equity award plans	6	2	5	3
Shares used in diluted computation	284	296	283	302
Basic	$ 0.39	$ 0.39	$ 0.62	$ 0.28
Diluted	$ 0.38	$ 0.39	$ 0.61	$ 0.28