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Earnings Per Share (Narrative) (Details) In Millions, unless otherwise specified	3 Months Ended
	Oct. 27, 2013	Oct. 28, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options not included in the diluted earnings per share calculation as they were antidilutive	0	0

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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