Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Apr. 28, 2017	Apr. 29, 2016
Components of Deferred Tax Assets and Liabilities [Abstract]
Reserves and accruals	$ 149	$ 214
Net operating loss and credit carryforwards	104	72
Stock-based compensation	49	66
Deferred revenue	329	336
Other	32	39
Gross deferred tax assets	663	727
Valuation allowance	(94)	(59)
Deferred tax assets, net of valuation allowance	569	668
Prepaids and accruals	3	3
Acquired intangibles	36	27
Property and equipment	4	14
Other	2	3
Total deferred tax liabilities	45	47
Deferred tax assets, net of valuation allowance and deferred tax liabilities	$ 524	$ 621