Consolidated Income Statements (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Sales	$ 2,985.5	$ 3,033.9	$ 8,913.1	$ 9,408.7
Cost of sales	2,005.6	2,070.7	6,064.3	6,625.8
Selling and administrative expense	235.4	238.7	714.4	724.3
Research and development expense	27.0	29.3	78.1	80.9
Business and asset actions	0.0	59.0	57.0	244.6
Other income (expense), net	20.1	8.0	42.4	22.9
Operating Income	737.6	644.2	2,041.7	1,756.0
Equity affiliates' income	168.9	165.0	470.6	440.9
Interest expense	55.7	47.4	169.1	129.5
Other non-operating income (expense), net	(1.3)	(11.7)	(25.3)	(26.2)
Income Before Taxes	849.5	750.1	2,317.9	2,041.2
Income tax provision	140.6	139.6	406.5	397.0
Net Income	708.9	610.5	1,911.4	1,644.2
Net Income Attributable to Noncontrolling Interests	12.3	14.9	33.1	36.6
Net Income Attributable to Air Products	$ 696.6	$ 595.6	$ 1,878.3	$ 1,607.6
Per Share Data
Basic earnings per share attributable to Air Products (in dollars per share)	$ 3.13	$ 2.68	$ 8.44	$ 7.23
Diluted earnings per share attributable to Air Products (in dollars per share)	$ 3.13	$ 2.67	$ 8.43	$ 7.22
Weighted Average Common Shares (in millions)
Basic (in shares)	222.5	222.4	222.5	222.3
Diluted (in shares)	222.8	222.8	222.8	222.7