Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net Income	$ 1,484	$ 1,779	$ 2,092
Other Comprehensive (Loss) Income, Net of Tax
Foreign currency translation adjustments	(91)	305	124
Defined benefit pension and postretirement plans	4	210	255
Cash flow hedges	27	85	81
Other Comprehensive (Loss) Income, Net of Tax	(60)	600	460
Comprehensive Income	$ 1,424	$ 2,379	$ 2,552