Restructuring Charges and Asset Impairments (Details) - Jul. 26, 2015 - USD ($) $ in Millions	Total
Restructuring Cost and Reserve [Line Items]
Restructuring costs and asset impairment charges	$ 17
Inventory-related charges	34
Restructuring accruals	10
Employee Severance and Other Employee-related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring accruals	8
Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Expected cost	45
Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Expected cost	$ 55