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Supplemental Financial Information - Other Non-Current Assets (Detail) - USD ($) $ in Millions	Jan. 24, 2020	Apr. 26, 2019
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Deferred tax assets	$ 222	$ 201
Operating lease ROU assets	142	0
Other assets	348	389
Other non-current assets	$ 712	$ 590

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards classified as noncurrent.

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Amount of lessee's right to use underlying asset under operating lease.

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