Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Apr. 29, 2016	Apr. 24, 2015
Components of Deferred Tax Assets and Liabilities [Abstract]
Reserves and accruals	$ 214	$ 94
Acquired intangibles	0	44
Net operating loss and credit carryforwards	72	80
Stock-based compensation	66	70
Deferred revenue	336	298
Other	39	27
Gross deferred tax assets	727	613
Valuation allowance	(59)	(58)
Deferred tax assets, net of valuation allowance	668	555
Prepaids and accruals	3	4
Acquired intangibles	27	14
Property and equipment	14	26
Other	3	3
Total deferred tax liabilities	47	47
Deferred tax assets, net of valuation allowance and deferred tax liabilities	$ 621	$ 508