Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net Income	$ 976	$ 695	$ 1,185
Other Comprehensive Income (Loss), Net of Tax
Foreign currency translation adjustments	(50)	(692)	(344)
Defined benefit pension and postretirement plans	(141)	(36)	(147)
Net unrealized gains (losses) on cash flow hedges, net of reclassifications	1	(9)	5
Other Comprehensive (Loss) Income, Net of Tax	(191)	(737)	(486)
Comprehensive Income (Loss)	$ 786	$ (42)	$ 699