Goodwill and Purchased Intangible Assets (Goodwill by Reportable Segment) (Details) (USD $) In Millions	9 Months Ended
Apr. 30, 2011
Balance, beginning	$ 16,674
Acquisitions	184
Other	22
Balance, ending	16,880
United States and Canada [Member]
Balance, beginning	11,289
Acquisitions	121
Other	(14)
Balance, ending	11,396
European Markets [Member]
Balance, beginning	2,729
Acquisitions	35
Other	35
Balance, ending	2,799
Emerging Markets [Member]
Balance, beginning	762
Acquisitions	4
Other	1
Balance, ending	767
Asia Pacific Markets [Member]
Balance, beginning	1,894
Acquisitions	24
Other
Balance, ending	$ 1,918

Carrying amount as of the balance sheet date, which is the cumulative amount paid, adjusted for any amortization recognized prior to adoption of FAS 142 and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e(1)

+ Details

Name:	us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Reflects net changes to the recorded value of goodwill for foreign currency translation adjustments and purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration