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Stockholders' Equity - Reconciliation of Retained Earnings (Detail) - USD ($) $ in Millions	3 Months Ended
	Jul. 29, 2016	Jul. 31, 2015
Retained Earnings Adjustments [Line Items]
Beginning balance	$ 0
Cumulative-effect of new accounting principle	21
Net income	64	$ (30)
Repurchases of common stock	(175)
Dividends paid	(53)	(54)
Ending balance	0
Retained Earnings
Retained Earnings Adjustments [Line Items]
Repurchases of common stock	(82)
Dividends paid	$ (3)	$ 0

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- Definition

Amount of the cumulative effect on retained earnings net of related income tax effect.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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