Commitments and Contingencies - Additional Information (Detail) - USD ($)	6 Months Ended
	Oct. 28, 2016	Oct. 30, 2015	Apr. 29, 2016
Commitments and Contingencies Disclosure [Line Items]
Future annual minimum lease payments	$ 238,000,000
Accrued purchase commitments with contract manufacturers	4,000,000		$ 7,000,000
Sale of finance receivables	108,000,000	$ 72,000,000
Legal proceedings and claims	$ 0
Maximum
Commitments and Contingencies Disclosure [Line Items]
Terms of recourse leases	3 years
Inventory
Commitments and Contingencies Disclosure [Line Items]
Purchase orders and other commitments	$ 291,000,000
Construction Related
Commitments and Contingencies Disclosure [Line Items]
Purchase orders and other commitments	15,000,000
Other
Commitments and Contingencies Disclosure [Line Items]
Purchase orders and other commitments	$ 231,000,000