Consolidated Income Statements (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Sales	$ 3,033.9	$ 3,189.3	$ 9,408.7	$ 9,128.6
Cost of sales	2,070.7	2,342.1	6,625.8	6,717.3
Selling and administrative expense	238.7	216.9	724.3	676.7
Research and development expense	29.3	24.8	80.9	71.8
Business and asset actions	59.0	0.0	244.6	0.0
Other income (expense), net	8.0	21.9	22.9	49.5
Operating Income	644.2	627.4	1,756.0	1,712.3
Equity affiliates' income	165.0	116.1	440.9	384.7
Interest expense	47.4	32.7	129.5	95.5
Other non-operating income (expense), net	(11.7)	10.5	(26.2)	42.2
Income Before Taxes	750.1	721.3	2,041.2	2,043.7
Income tax provision	139.6	134.2	397.0	370.2
Net Income	610.5	587.1	1,644.2	1,673.5
Net income attributable to noncontrolling interests	14.9	5.0	36.6	0.5
Net Income Attributable to Air Products	$ 595.6	$ 582.1	$ 1,607.6	$ 1,673.0
Per Share Data
Basic EPS attributable to Air Products (in dollars per share)	$ 2.68	$ 2.62	$ 7.23	$ 7.54
Diluted EPS attributable to Air Products (in dollars per share)	$ 2.67	$ 2.62	$ 7.22	$ 7.52
Weighted Average Common Shares (in millions)
Basic (in shares)	222.4	222.0	222.3	222.0
Diluted (in shares)	222.8	222.5	222.7	222.5