Estimated Future Amortization Expense on Technology Placed in Service (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 30, 2012
2012	$ 69
2013	66
2014	62
2015	49
2016 and thereafter	291
Total	537
Technology and Software
2012	148
2013	132
2014	120
2015	88
2016 and thereafter	53
Total	$ 541

The amount of amortization expense expected to be recognized during year three of the five succeeding fiscal years.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275

Name:	us-gaap_FutureAmortizationExpenseYearThree
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration