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Commitments and Contingencies - Additional Information (Detail) - USD ($)	9 Months Ended
	Jan. 27, 2017	Jan. 29, 2016	Apr. 29, 2016
Commitments and Contingencies Disclosure [Line Items]
Future annual minimum lease payments	$ 227,000,000
Accrued purchase commitments with contract manufacturers	11,000,000		$ 7,000,000
Sale of finance receivables	142,000,000	$ 153,000,000
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	$ 313,000,000
Construction Related
Commitments and Contingencies Disclosure [Line Items]
Purchase orders and other commitments	20,000,000
Other
Commitments and Contingencies Disclosure [Line Items]
Purchase orders and other commitments	$ 220,000,000

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Accrued liability for quantities in excess of future demand forecasts with contract manufacturers.

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Commitments and contingencies disclosure.

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- Definition

The approximate maximum term of recourse financing arrangements.

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Amount of loss contingency liability.

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-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
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-Name Accounting Standards Codification
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

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