v2.4.1.9

Goodwill and Purchased Intangible Assets (Schedule Of Purchased Intangible Assets With Finite And Indefinite Lives) (Details) (USD $) In Millions, unless otherwise specified	Apr. 25, 2015	Jul. 26, 2014
Business Acquisition [Line Items]
Gross	$ 5,216us-gaap_FiniteLivedIntangibleAssetsGross	$ 5,857us-gaap_FiniteLivedIntangibleAssetsGross
Accumulated Amortization	(2,679)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization	(2,709)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Total purchased intangible assets with finite lives, net	2,537us-gaap_FiniteLivedIntangibleAssetsNet	3,148us-gaap_FiniteLivedIntangibleAssetsNet
In-process research and development, with indefinite lives	89us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill	132us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Total- Gross	5,305us-gaap_IntangibleAssetsGrossExcludingGoodwill	5,989us-gaap_IntangibleAssetsGrossExcludingGoodwill
Total, net	2,626us-gaap_IntangibleAssetsNetExcludingGoodwill	3,280us-gaap_IntangibleAssetsNetExcludingGoodwill
TECHNOLOGY
Business Acquisition [Line Items]
Gross	3,456us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyBasedIntangibleAssetsMember	4,100us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyBasedIntangibleAssetsMember
Accumulated Amortization	(1,742)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyBasedIntangibleAssetsMember	(1,976)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyBasedIntangibleAssetsMember
Total purchased intangible assets with finite lives, net	1,714us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyBasedIntangibleAssetsMember	2,124us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyBasedIntangibleAssetsMember
CUSTOMER RELATIONSHIPS
Business Acquisition [Line Items]
Gross	1,709us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember	1,706us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Accumulated Amortization	(915)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember	(720)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Total purchased intangible assets with finite lives, net	794us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember	986us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
OTHER
Business Acquisition [Line Items]
Gross	51us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember	51us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember
Accumulated Amortization	(22)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember	(13)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember
Total purchased intangible assets with finite lives, net	$ 29us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember	$ 38us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember

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