Income Taxes (Income Before Provision For Income Taxes) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Apr. 30, 2016	Apr. 25, 2015	Apr. 30, 2016	Apr. 25, 2015
Income Tax Disclosure [Abstract]
INCOME BEFORE PROVISION FOR INCOME TAXES	$ 3,083	$ 3,035	$ 9,526	$ 8,268
Provision for income taxes	$ 734	$ 598	$ 1,600	$ 1,606
Effective Income Tax Rate Reconciliation, Percent	23.80%	19.70%	16.80%	19.40%

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=51673353&loc=d3e41242-110953

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 10
-Article 5

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