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Balance Sheet Details - Additional Information (Detail) - USD ($) $ in Millions		9 Months Ended
	Dec. 07, 2017	Jan. 26, 2018	Jan. 27, 2017	Jan. 25, 2019	Sep. 08, 2017	Apr. 28, 2017
Property Plant And Equipment [Line Items]
Sale price of properties					$ 306
Net book value		$ 741				$ 799
Cash proceeds from properties sold		210	$ 0
Scenario, Forecast
Property Plant And Equipment [Line Items]
Sale of assets payments to be received				$ 96
Properties Sold
Property Plant And Equipment [Line Items]
Net book value	$ 66
Cash proceeds from properties sold	210
Gain on sale of properties, net of direct selling costs	$ 142
Other Current Assets
Property Plant And Equipment [Line Items]
Land and buildings held for sale		$ 52				$ 118

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- Definition

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+ References

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- Definition

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- Definition

Amount of assets held-for-sale that are not part of a disposal group.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 15
-Paragraph 4
-Subparagraph (b)(2)
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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
-Paragraph 28
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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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