Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net earnings	$ 2,246	$ 1,955	$ 13,200
Other comprehensive income (loss), net of tax:
Foreign currency translation	47	400	254
Pension and postretirement	(24)	2	(25)
Cash flow hedges	20	(13)	4
Total other comprehensive income (loss)	43	389	233
Comprehensive income	2,289	2,344	13,433
Less: Noncontrolling interests in comprehensive income of subsidiaries	(51)	(9)	(18)
Comprehensive income common stockholders	$ 2,340	$ 2,353	$ 13,451