Balance Sheet Details - Deferred Revenue and Financed Unearned Services Revenue (Detail) - USD ($) $ in Millions	Apr. 29, 2016	Apr. 24, 2015
Deferred Revenue And Credits [Line Items]
Deferred revenue and financed unearned services revenue	$ 3,385	$ 3,197
Short-term	1,794	1,724
Long-term	1,591	1,473
Deferred product revenue
Deferred Revenue And Credits [Line Items]
Deferred revenue and financed unearned services revenue	68	17
Deferred services revenue
Deferred Revenue And Credits [Line Items]
Deferred revenue and financed unearned services revenue	3,100	3,075
Financed unearned services revenue
Deferred Revenue And Credits [Line Items]
Deferred revenue and financed unearned services revenue	$ 217	$ 105