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Goodwill and Purchased Intangible Assets, Net - Amortization Expense for Purchased Intangible Assets (Detail) - USD ($) $ in Millions	3 Months Ended
	Jul. 25, 2025	Jul. 26, 2024
Acquired Finite Lived Intangible Assets [Line Items]
Amortization expense	$ 6	$ 14
Cost of revenues | Developed Technology
Acquired Finite Lived Intangible Assets [Line Items]
Amortization expense	3	8
Operating expenses | Customer Contracts/Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Amortization expense	$ 3	$ 6

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