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 earnings	$ 13,200	$ 3,230	$ 2,327
Other comprehensive income (loss), net of tax:
Foreign currency translation	254	(644)	81
Pension and postretirement	(25)	37	605
Cash flow hedges	4	(14)	18
Total other comprehensive income (loss)	233	(621)	704
Comprehensive income	13,433	2,609	3,031
Less: Noncontrolling interests in comprehensive income of subsidiaries	(18)	(9)	23
Comprehensive income common stockholders	$ 13,451	$ 2,618	$ 3,008