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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
	Jul. 28, 2017	Jul. 29, 2016
Net income per share:
Net income	$ 136	$ 64
Shares used in basic computation	270	279
Dilutive impact of employee equity award plans	8	3
Shares used in diluted computation	278	282
Basic	$ 0.50	$ 0.23
Diluted	$ 0.49	$ 0.23

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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