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Goodwill and Other Intangible Assets, Net - Carrying Amount and Accumulated Amortization of Intangible Assets (Details) - USD ($) $ in Millions | Jan. 29, 2016 | Apr. 24, 2015
--- | --- | ---
Indefinite-lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Non-Amortizable | $ 775 | $ 720
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Amortizable | 30,786 | 30,329
Accumulated Amortization | (4,245) | (2,948)
IPR&D [Member] |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Non-Amortizable | 775 | 470
Tradenames [Member] |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Non-Amortizable | 0 | 250
Customer-related [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Amortizable | 18,558 | 18,492
Accumulated Amortization | (1,066) | (273)
Purchased technology and patents [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Amortizable | 11,305 | 11,118
Accumulated Amortization | (2,722) | (2,268)
Trademarks and tradenames [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Amortizable | 852 | 640
Accumulated Amortization | (429) | (363)
Other [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount, Amortizable | 71 | 79
Accumulated Amortization | $ (28) | $ (44)

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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