Income Taxes (Income Before Provision For Income Taxes) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jan. 23, 2016	Jan. 24, 2015	Jan. 23, 2016	Jan. 24, 2015
Income Tax Disclosure [Abstract]
INCOME BEFORE PROVISION FOR INCOME TAXES	$ 3,306	$ 2,873	$ 6,443	$ 5,233
Provision for income taxes	$ 159	$ 476	$ 866	$ 1,008
Effective Income Tax Rate Reconciliation, Percent	4.80%	16.60%	13.40%	19.30%

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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