Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net Income	$ 326	$ 302	$ 884	$ 1,203
Other Comprehensive Income (Loss), Net of Tax
Foreign currency translation adjustments	(11)	(75)	3	(109)
Defined benefit pension and postretirement plans	8	14	51	41
Unrealized gains on cash flow hedges, net of amounts realized	1	1	4	6
Other Comprehensive Income (Loss), Net of Tax	(2)	(61)	58	(62)
Comprehensive Income	$ 324	$ 240	$ 943	$ 1,140