Financial Information by Segment & Geographic Area - Schedule of Income (Loss) from Continuing Operations before Taxes for Unallocated and Other (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Interest expense									$ (55)	$ (62)	$ (46)
Equity in earnings of affiliated companies, net of tax	2	(2)	(2)	2	2	3	3	3		11	11
Income from continuing operations before income taxes and equity in (loss) earnings of affiliated companies	71	80	48	109	56	74	37	43	308	210	246
Unallocated and Other [Member]
Segment Reporting Information [Line Items]
Interest expense									(55)	(62)	(46)
Total certain items, pre-tax									(28)	(54)	(51)
Equity in earnings of affiliated companies, net of tax									(4)	(4)	(11)
Unallocated corporate costs									(54)	(48)	(56)
General unallocated expense									(2)	(1)
Income from continuing operations before income taxes and equity in (loss) earnings of affiliated companies									$ (139)	$ (176)	$ (164)