Income Taxes (Income Before Provision For Income Taxes) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Apr. 25, 2015	Apr. 26, 2014	Apr. 25, 2015	Apr. 26, 2014
Income Tax Disclosure [Abstract]
INCOME BEFORE PROVISION FOR INCOME TAXES	$ 3,035	$ 2,642	$ 8,268	$ 6,937
Provision for income taxes	$ 598us-gaap_IncomeTaxExpenseBenefit	$ 461us-gaap_IncomeTaxExpenseBenefit	$ 1,606us-gaap_IncomeTaxExpenseBenefit	$ 1,331us-gaap_IncomeTaxExpenseBenefit
Effective Income Tax Rate Reconciliation, Percent	19.70%	17.40%	19.40%	19.20%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h)(2))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph h

-Subparagraph 2

-Article 4

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