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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. 26, 2019	Apr. 27, 2018	Apr. 28, 2017
Net income per share:
Net income	$ 1,169	$ 116	$ 481
Shares used in basic computation	254	268	275
Dilutive impact of employee equity award plans	5	8	6
Shares used in diluted computation	259	276	281
Basic	$ 4.60	$ 0.43	$ 1.75
Diluted	$ 4.51	$ 0.42	$ 1.71

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