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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. 25, 2019	Oct. 26, 2018	Oct. 25, 2019	Oct. 26, 2018
Net income per share:
Net income	$ 243	$ 241	$ 346	$ 524
Shares used in basic computation	235	258	237	260
Dilutive impact of employee equity award plans	1	6	3	7
Shares used in diluted computation	236	264	240	267
Basic	$ 1.03	$ 0.93	$ 1.46	$ 2.02
Diluted	$ 1.03	$ 0.91	$ 1.44	$ 1.96

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