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Stockholders' Equity - Income Tax Effects Associated with Employee Stock Transactions (Detail) - USD ($) $ in Millions	6 Months Ended
	Oct. 30, 2015	Oct. 24, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Income tax benefit associated with employee stock transactions	$ 33	$ 58

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- Definition

Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 740



-Section 45



-Paragraph 2



-URI http://asc.fasb.org/extlink&oid=6419406&loc=d3e23524-113945



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 505



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.3-04)



-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 505



-SubTopic 10



-Section 50



-Paragraph 2



-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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X

- References

No definition available.

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