Goodwill and Intangible Assets - Impairment Analysis (Details)	12 Months Ended
	Jul. 30, 2016	Jul. 25, 2015	Jul. 26, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	11.50%	11.50%	11.50%
Change In Fair Value, Percentage	25.00%
Percentage Change in Fair Value Input	100.00%
Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	2.00%	1.50%	1.50%
Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	3.00%	2.50%	3.00%