Aggregate Intrinsic Value for Stock Options Outstanding and Exercisable (Detail) (USD $) In Millions, unless otherwise specified	May 02, 2015	May 03, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding	$ 153	$ 128
Outstanding and exercisable	137	110
Vested and expected to vest	$ 153	$ 127

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding and Exercisable, Aggregate Intrinsic Value

No definition available.

+ Details

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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