Financial Information by Segment (Financial Information by Segment) (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Royalties paid by equity affiliates, other operating revenues, and the impact of corporate adjustments for unearned revenue	$ (1)	$ 9
Shipping and handling fees	19	20
Total	$ 18	$ 29

Fees charged to customers for the delivery, generally by postal or freight service providers, of product or goods purchased.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(a))

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 45

-Section 45

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=21915142&loc=d3e60635-111653

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