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Balance Sheet Details - Deferred Revenue and Financed Unearned Services Revenue (Detail) - USD ($) $ in Millions	Apr. 28, 2017	Apr. 29, 2016
Deferred Revenue And Credits [Line Items]
Deferred revenue and financed unearned services revenue	$ 3,342	$ 3,385
Short-term	1,744	1,794
Long-term	1,598	1,591
Deferred product revenue
Deferred Revenue And Credits [Line Items]
Deferred revenue and financed unearned services revenue	124	68
Deferred services revenue
Deferred Revenue And Credits [Line Items]
Deferred revenue and financed unearned services revenue	2,999	3,100
Financed unearned services revenue
Deferred Revenue And Credits [Line Items]
Deferred revenue and financed unearned services revenue	$ 219	$ 217

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