Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net Income	$ 525	$ 286	$ 1,827	$ 746
Other Comprehensive Income (Loss), Net of Tax
Foreign currency translation adjustments	19	34	68	(66)
Defined benefit pension and postretirement plans	14	17	72	50
Cash flow hedges	(34)	2	78	(68)
Other Comprehensive (Loss) Income, Net of Tax	(1)	53	218	(83)
Comprehensive Income	$ 524	$ 338	$ 2,045	$ 663