Balance Sheet Details - Deferred Revenue and Financed Unearned Services Revenue (Detail) - USD ($) $ in Millions	Jul. 29, 2016	Apr. 29, 2016
Deferred Revenue And Credits [Line Items]
Deferred revenue and financed unearned services revenue	$ 3,300	$ 3,385
Short-term	1,724	1,794
Long-term	1,576	1,591
Deferred product revenue
Deferred Revenue And Credits [Line Items]
Deferred revenue and financed unearned services revenue	63	68
Deferred services revenue
Deferred Revenue And Credits [Line Items]
Deferred revenue and financed unearned services revenue	3,017	3,100
Financed unearned services revenue
Deferred Revenue And Credits [Line Items]
Deferred revenue and financed unearned services revenue	$ 220	$ 217