Fair Value Measurements Fair Value Measurements Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended				12 Months Ended				22 Months Ended	12 Months Ended		22 Months Ended	12 Months Ended		22 Months Ended			12 Months Ended
	Jul. 28, 2013	Aug. 03, 2014	Aug. 03, 2014 Fair Value, Inputs, Level 2 [Member]	Jul. 28, 2013 Fair Value, Inputs, Level 2 [Member]	Aug. 03, 2014 2014 Initiatives [Member]	Aug. 03, 2014 2014 Initiatives [Member] Asset Impairment Accelerated Depreciation [Member]	Aug. 03, 2014 2013 Initiatives [Member]	Jul. 28, 2013 2013 Initiatives [Member]	Aug. 03, 2014 2013 Initiatives [Member]	Aug. 03, 2014 2013 Initiatives [Member] Asset Impairment Accelerated Depreciation [Member]	Jul. 28, 2013 2013 Initiatives [Member] Asset Impairment Accelerated Depreciation [Member]	Aug. 03, 2014 2013 Initiatives [Member] Asset Impairment Accelerated Depreciation [Member]	Aug. 03, 2014 International Simple Meals And Beverages [Member] 2014 Initiatives [Member]	Aug. 03, 2014 International Simple Meals And Beverages [Member] 2014 Initiatives [Member] Asset Impairment Accelerated Depreciation [Member]	Aug. 03, 2014 International Simple Meals And Beverages [Member] 2013 Initiatives [Member]	Aug. 03, 2014 International Simple Meals And Beverages [Member] 2013 Initiatives [Member] Asset Impairment Accelerated Depreciation [Member]	Jul. 28, 2013 Discontinued Operations [Member]	Jul. 28, 2013 Discontinued Operations [Member] International Simple Meals And Beverages [Member]	Jul. 29, 2012 Discontinued Operations [Member] International Simple Meals And Beverages [Member]	Jul. 28, 2013 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Jul. 28, 2013 Fair Value, Measurements, Nonrecurring [Member] Discontinued Operations [Member] International Simple Meals And Beverages [Member] Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restructuring and Related Cost, Cost Incurred to Date					$ 54	$ 12			$ 146			$ 99	$ 18	$ 11	$ 9	$ 3
Goodwill, Impairment Loss	360																	360
Disposal Group, Including Discontinued Operation, Goodwill																	110				110
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)																		36	3
Restructuring and Related Cost, Incurred Cost					54	12	4	142		0	99
Property, Plant, and Equipment, Fair Value Disclosure																				29
Cash and Cash Equivalents, Fair Value Disclosure			46	4
Cash and Cash Equivalents, at Carrying Value	4	46
Long-term Debt, Fair Value			2,647	3,299
Long-term Debt	$ 3,244	$ 2,544