Goodwill and Other Intangible Assets - Other Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Sep. 30, 2012	Jun. 30, 2012
Intangible Assets [Line Items]
Gross Carrying Amount, Total Amortized Intangible Assets	$ 1,063	$ 909	$ 894
Gross Carrying Amount, Total Intangible Assets	1,378	1,224	1,208
Accumulated Amortization	(323)	(277)	(259)
Net, Total Amortized Intangible Assets	740	632	635
Net, Total Intangible Assets	1,055	947	949
Trademarks
Intangible Assets [Line Items]
Gross Carrying Amount and Net	315	315	314
Patented Technology
Intangible Assets [Line Items]
Gross Carrying Amount, Total Amortized Intangible Assets	168	188	185
Accumulated Amortization	(104)	(113)	(108)
Net, Total Amortized Intangible Assets	64	75	77
Customer Relationships
Intangible Assets [Line Items]
Gross Carrying Amount, Total Amortized Intangible Assets	548	517	510
Accumulated Amortization	(133)	(117)	(108)
Net, Total Amortized Intangible Assets	415	400	402
Miscellaneous
Intangible Assets [Line Items]
Gross Carrying Amount, Total Amortized Intangible Assets	347	204	199
Accumulated Amortization	(86)	(47)	(43)
Net, Total Amortized Intangible Assets	$ 261	$ 157	$ 156