Employee Benefit Plans (Additional Information - Employee Stock Purchase Plan) (Details) - Employee Stock Purchase Plan - shares shares in Millions	12 Months Ended
	Jul. 30, 2016	Jul. 25, 2015	Jul. 26, 2014
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Shares reserved for issuance (in shares)	621
Employee Stock Purchase Plan (ESPP), Plan Description	24-month offering period, which consists of four consecutive 6-month purchase periods. Employees may purchase a limited number of shares of the Company’s stock at a discount of up to 15% of the lesser of the market value at the beginning of the offering period or the end of each 6-month purchase period.
ESPP- discount % of the lesser of the market value at the beginning of the offering period or the end of each 6-month purchase period	15.00%
ESPP Expiration Date	Jan. 03, 2020
Shares issued under employee purchase plan, shares	25	27	27
ESPP- shares available for issuance (in shares)	123