Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net Income	$ 286	$ 451	$ 746	$ 1,071
Other Comprehensive Income (Loss), Net of Tax
Foreign currency translation adjustments	34	(68)	(66)	(27)
Defined benefit pension and postretirement plans	17	12	50	40
Cash flow hedges	2	(3)	(68)	(2)
Other Comprehensive Income (Loss), Net of Tax	53	(58)	(83)	12
Comprehensive Income	$ 338	$ 393	$ 663	$ 1,082