Financial Information by Segment & Geographic Area - Revenues from External Customers and Long-Lived Asset Information by Geographic Area (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
Sales Information [Line Items]
Revenues from external customers	$ 3,463	[1]	$ 3,300	[1]	$ 3,102	[1]
Net property, plant and equipment	1,605		1,552		1,036
US [Member]
Sales Information [Line Items]
Revenues from external customers	825		695		589
Net property, plant and equipment	493		486		233
China [Member]
Sales Information [Line Items]
Revenues from external customers	558		543		554
Net property, plant and equipment	385		305		274
Netherlands [Member]
Sales Information [Line Items]
Revenues from external customers	224		131		115
Net property, plant and equipment	211		208		45
Other Foreign Countries [Member]
Sales Information [Line Items]
Revenues from external customers	1,856		1,931		1,844
Net property, plant and equipment	$ 516		$ 553		$ 484

[1] Unallocated and other reflects royalties paid by equity affiliates, external shipping and handling fees, the impact of the corporate adjustment for unearned revenue and Notes receivable.