Supplemental Cash Flow Disclosures (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
Feb. 29, 2012	Feb. 28, 2011
Notes to Financial Statements [Abstract]
Cash paid for interest	$ 46	$ 42
Cash paid for income taxes	$ 672	$ 634

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 29

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 27

-Subparagraph f

Name:	us-gaap_IncomeTaxesPaid
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration