Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount recognized for uncertainty in income taxes classified as noncurrent.

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Amount of unrecognized tax benefits.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		8 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017	Dec. 31, 2017	Apr. 27, 2018
Income Tax Contingency [Line Items]
Provision (benefit) for income taxes	$ 52	$ 48	$ 41	$ 62
U.S. federal corporate tax rate			21.00%		35.00%
Gross unrecognized tax benefits	356		$ 356
Gross unrecognized tax benefits included in other long-term liabilities	324		324			$ 314
Unrecognized tax benefits that would affect provision for income taxes	$ 306		306
Impact of ASC 606 Adoption \| ASC 606
Income Tax Contingency [Line Items]
Provision (benefit) for income taxes		$ (2)	$ (34)	$ (5)