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Purchased Intangible Assets, Net - Purchased Intangible Assets, Net (Detail) - USD ($) $ in Millions	Jul. 27, 2018	Apr. 27, 2018
Acquired Finite Lived Intangible Assets [Line Items]
Gross Assets	$ 201	$ 216
Accumulated Amortization	(120)	(122)
Net Assets	81	94
Developed Technology
Acquired Finite Lived Intangible Assets [Line Items]
Gross Assets	160	164
Accumulated Amortization	(86)	(80)
Net Assets	74	84
Customer Contracts/Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Gross Assets	41	43
Accumulated Amortization	(34)	(33)
Net Assets	7	10
Other Purchased Intangibles
Acquired Finite Lived Intangible Assets [Line Items]
Gross Assets	0	9
Accumulated Amortization	0	(9)
Net Assets	$ 0	$ 0

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+ References

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-Publisher FASB
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-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
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