Consolidated Statements of Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	AOCL	[1]	Treasury Stock	Air Products Shareholders' Equity	Non- controlling Interests
Beginning balance at Sep. 30, 2023	$ 15,660.3	$ 249.4	$ 1,190.5	$ 17,289.7	$ (2,449.4)		$ (1,967.3)	$ 14,312.9	$ 1,347.4
Stockholders' Equity [Roll Forward]
Net income	621.6			609.3				609.3	12.3
Other comprehensive income (loss)	191.0				329.1			329.1	(138.1)
Dividends on common stock	(389.0)			(389.0)				(389.0)
Share-based compensation	13.8		13.8					13.8
Issuance of treasury shares for stock option and award plans	(3.2)		(4.4)				1.2	(3.2)
Investments by noncontrolling interests	34.5								34.5
Other equity transactions	0.1		0.1					0.1
Ending balance at Dec. 31, 2023	16,129.1	249.4	1,200.0	17,510.0	(2,120.3)		(1,966.1)	14,873.0	1,256.1
Beginning balance at Sep. 30, 2024	18,673.7	249.4	1,253.2	19,545.7	(2,027.7)		(1,984.1)	17,036.5	1,637.2
Stockholders' Equity [Roll Forward]
Net income	649.8			617.4				617.4	32.4
Other comprehensive income (loss)	(455.4)				(558.5)			(558.5)	103.1
Dividends on common stock	(393.8)			(393.8)				(393.8)
Distributions to noncontrolling interests	(1.4)								(1.4)
Share-based compensation	14.3		14.3					14.3
Issuance of treasury shares for stock option and award plans	(21.8)		(6.8)				(15.0)	(21.8)
Investments by noncontrolling interests	281.0								281.0
Purchase of noncontrolling interests	(5.9)								(5.9)
Other equity transactions	(1.8)		0.2	(2.0)				(1.8)
Ending balance at Dec. 31, 2024	$ 18,738.7	$ 249.4	$ 1,260.9	$ 19,767.3	$ (2,586.2)		$ (1,999.1)	$ 16,692.3	$ 2,046.4

[1] (A)Accumulated other comprehensive loss