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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		9 Months Ended
	Jan. 24, 2020	Jan. 25, 2019	Jan. 24, 2020	Jan. 25, 2019
Net income per share:
Net income	$ 277	$ 249	$ 623	$ 773
Shares used in basic computation	226	250	233	257
Dilutive impact of employee equity award plans	3	5	3	6
Shares used in diluted computation	229	255	236	263
Basic	$ 1.23	$ 1.00	$ 2.67	$ 3.01
Diluted	$ 1.21	$ 0.98	$ 2.64	$ 2.94

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