Summary of Significant Accounting Policies - Depreciation Period by Type of Assets (Details)	12 Months Ended
	Jul. 27, 2019
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	25 years
Building improvements
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years
Computer equipment and related software | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	36 months
Computer equipment and related software | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	30 months
Production, engineering, and other equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years