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Supplemental Financial Information - Property and Equipment Net (Detail) - USD ($) $ in Millions	Jan. 25, 2019	Apr. 27, 2018
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 2,071	$ 2,004
Accumulated depreciation and amortization	(1,308)	(1,248)
Property and equipment, net	763	756
Land
Property Plant And Equipment [Line Items]
Property and equipment, gross	106	106
Buildings and improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	605	594
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	87	88
Computer, production, engineering and other equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	806	733
Computer software
Property Plant And Equipment [Line Items]
Property and equipment, gross	357	357
Furniture and fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	104	99
Construction-in-progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 6	$ 27

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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