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Restructuring and Other Charges (Additional Information) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	3 Months Ended		6 Months Ended
	Jan. 24, 2015	Jan. 24, 2015	Jan. 25, 2014	Jan. 25, 2014	Jul. 26, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 387us-gaap_RestructuringCharges
Fiscal 2015 plan
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	387	69
Fiscal 2015 plan \| Expected Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	600	600
Fiscal 2014 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			73	310
Cumulative restructuring charges					$ 418

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References+ Details