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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		8 Months Ended
	Oct. 25, 2019	Oct. 26, 2018	Oct. 25, 2019	Oct. 26, 2018	Dec. 31, 2017	Apr. 26, 2019
Income Tax Contingency [Line Items]
U.S. federal corporate tax rate			21.00%		35.00%
Provision (benefit) for income taxes	$ 56	$ 52	$ 72	$ 41
Gross unrecognized tax benefits	294		294
Gross unrecognized tax benefits included in other long-term liabilities	251		251			$ 252
Unrecognized tax benefits that would affect provision for income taxes	$ 246		$ 246
Impact of ASC 606 Adoption | ASC 606
Income Tax Contingency [Line Items]
Provision (benefit) for income taxes				$ (34)

X

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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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