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Goodwill and Purchased Intangible Assets, Net - Purchased Intangible Assets, Net (Detail) - USD ($) $ in Millions	Apr. 26, 2019	Apr. 27, 2018
Acquired Finite Lived Intangible Assets [Line Items]
Gross Assets	$ 201	$ 216
Accumulated Amortization	(154)	(122)
Net Assets	47	94
Developed Technology
Acquired Finite Lived Intangible Assets [Line Items]
Gross Assets	160	164
Accumulated Amortization	(113)	(80)
Net Assets	47	84
Customer Contracts/Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Gross Assets	41	43
Accumulated Amortization	(41)	(33)
Net Assets	0	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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
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