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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	12 Months Ended
	Apr. 24, 2020	Apr. 26, 2019	Apr. 27, 2018
Net income per share:
Net income	$ 819	$ 1,169	$ 116
Shares used in basic computation	230	254	268
Dilutive impact of employee equity award plans	3	5	8
Shares used in diluted computation	233	259	276
Basic	$ 3.56	$ 4.60	$ 0.43
Diluted	$ 3.52	$ 4.51	$ 0.42

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