Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common stockholders' equity	Common stock	Additional paid-in-capital	Retained earnings	Accumulated other comprehensive income (loss)	Treasury stock	Noncontrolling interests in subsidiaries
Stockholders' equity, beginning balance at Sep. 30, 2024				$ 169	$ 40,830	$ (868)	$ (18,972)	$ 5,873
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock plans				(56)
Reclass negative APIC to retained earnings				0	0
Net earnings common stockholders	$ 585				585
Dividends paid (per share: $0.5275 and $0.555, respectively)					(303)			0
Foreign currency translation	(492)					(485)
Pension and postretirement	3					3
Cash flow hedges	10					10
Purchases							(946)
Issued under stock plans							46
Net earnings								8
Stock plans								15
Other comprehensive income	(479)							(7)
Stockholders' equity, ending balance at Dec. 31, 2024	26,379	$ 20,490	$ 477	113	41,112	(1,340)	(19,872)	5,889
Stockholders' equity, beginning balance at Sep. 30, 2025	20,298			85	40,603	(821)	(20,062)	16
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock plans				(92)
Reclass negative APIC to retained earnings				23	(23)
Net earnings common stockholders	605				605
Dividends paid (per share: $0.5275 and $0.555, respectively)					(314)			(1)
Foreign currency translation	(20)					(19)
Pension and postretirement	4					4
Cash flow hedges	8					8
Purchases							(252)
Issued under stock plans							55
Net earnings								1
Stock plans								0
Other comprehensive income	(8)							(1)
Stockholders' equity, ending balance at Dec. 31, 2025	$ 20,292	$ 20,277	$ 477	$ 16	$ 40,871	$ (828)	$ (20,259)	$ 15