Employee Benefit Plans (Summary Of Share-Based Awards Available For Grant) (Detail) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended
Jan. 25, 2014	Jul. 27, 2013
Share-based Awards Available for Grant [Roll Forward]
Beginning balance (in shares)	228	218
Reduction from available-for-grant share balance due to issuance of stock awards	(80)	(102)
Share-based awards canceled/forfeited/expired	22	115
Additional shares reserved	135
Other	1	(3)
Ending balance (in shares)	306	228

Adjustment to Share-Based Awards Grants For The Period

No definition available.

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- Definition

Reduction from available-for-grant share balance due to issuance of stock awards

+ References

No definition available.

+ Details

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- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

+ Details

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ 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

+ Details

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- Details

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- Definition

Number of shares (or other type of equity) forfeited during the period.

+ References

No definition available.

+ Details

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