Consolidated Statements of Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	AOCL		Treasury Stock	Air Products Share-holders' 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]	$ (1,967.3)	$ 14,312.9	$ 1,347.4
Stockholders' Equity [Roll Forward]
Net income (loss)	1,911.4			1,878.3				1,878.3	33.1
Other comprehensive income	0.5				58.3	[1]		58.3	(57.8)
Dividends on common stock	(1,176.1)			(1,176.1)				(1,176.1)
Distributions to noncontrolling interests	(15.7)								(15.7)
Share-based compensation	44.0		44.0					44.0
Issuance of treasury shares for stock option and award plans	(14.3)		3.4				(17.7)	(14.3)
Investments by noncontrolling interests	278.7								278.7
Other equity transactions	(1.8)		0.2	(2.0)				(1.8)
Ending balance at Jun. 30, 2024	16,687.0	249.4	1,238.1	17,989.9	(2,391.1)	[1],[2]	(1,985.0)	15,101.3	1,585.7
Beginning balance at Mar. 31, 2024	16,334.9	249.4	1,215.7	17,690.0	(2,275.9)	[2]	(1,965.8)	14,913.4	1,421.5
Stockholders' Equity [Roll Forward]
Net income (loss)	708.9			696.6				696.6	12.3
Other comprehensive income	(97.4)				(115.2)	[2]		(115.2)	17.8
Dividends on common stock	(393.6)			(393.6)				(393.6)
Distributions to noncontrolling interests	(2.0)								(2.0)
Share-based compensation	14.5		14.5					14.5
Issuance of treasury shares for stock option and award plans	(11.3)		7.9				(19.2)	(11.3)
Investments by noncontrolling interests	136.1								136.1
Other equity transactions	(3.1)		0.0	(3.1)				(3.1)	0.0
Ending balance at Jun. 30, 2024	16,687.0	249.4	1,238.1	17,989.9	(2,391.1)	[1],[2]	(1,985.0)	15,101.3	1,585.7
Beginning balance at Sep. 30, 2024	18,673.7	249.4	1,253.2	19,545.7	(2,027.7)	[1]	(1,984.1)	17,036.5	1,637.2
Stockholders' Equity [Roll Forward]
Net income (loss)	(364.5)			(399.4)				(399.4)	34.9
Other comprehensive income	140.3				57.9	[1]		57.9	82.4
Dividends on common stock	(1,190.5)			(1,190.5)				(1,190.5)
Distributions to noncontrolling interests	(4.0)								(4.0)
Share-based compensation	62.5		62.5					62.5
Issuance of treasury shares for stock option and award plans	(26.8)		(13.8)				(13.0)	(26.8)
Investments by noncontrolling interests	485.9								485.9
Purchase of noncontrolling interests	(5.9)								(5.9)
Other equity transactions	(2.7)		0.2	(2.9)				(2.7)
Ending balance at Jun. 30, 2025	17,768.0	249.4	1,302.1	17,952.9	(1,969.8)	[1],[2]	(1,997.1)	15,537.5	2,230.5
Beginning balance at Mar. 31, 2025	16,779.6	249.4	1,291.4	17,637.3	(2,477.7)	[2]	(1,997.0)	14,703.4	2,076.2
Stockholders' Equity [Roll Forward]
Net income (loss)	723.2			713.8				713.8	9.4
Other comprehensive income	531.9				507.9	[2]		507.9	24.0
Dividends on common stock	(398.4)			(398.4)				(398.4)
Distributions to noncontrolling interests	(2.6)								(2.6)
Share-based compensation	11.5		11.5					11.5
Issuance of treasury shares for stock option and award plans	(1.1)		(1.0)				(0.1)	(1.1)
Investments by noncontrolling interests	123.5								123.5
Other equity transactions	0.4		0.2	0.2				0.4
Ending balance at Jun. 30, 2025	$ 17,768.0	$ 249.4	$ 1,302.1	$ 17,952.9	$ (1,969.8)	[1],[2]	$ (1,997.1)	$ 15,537.5	$ 2,230.5

[1] (A)Accumulated other comprehensive loss

[2] Accumulated other comprehensive loss