Restructuring and Other Charges (Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 25, 2015	Jul. 26, 2014	Jul. 27, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 484	$ 418	$ 105
Fiscal 2015 Plan | Cost of Sales and Opex
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	489
Fiscal 2015 Plan | Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	5
Fiscal 2015 Plan | Pre-tax | Expected Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 700
Fiscal 2014 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 418
Fiscal 2011 Plans
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			105
Cumulative pre-tax restructuring charges			$ 1,100