Consolidated Income Statements (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Income Statement [Abstract]
Sales	$ 2,916.2	$ 2,930.2	$ 5,847.7	$ 5,927.6
Cost of sales	2,053.9	1,991.5	4,070.4	4,058.7
Selling and administrative expense	222.0	240.6	464.4	479.0
Research and development expense	22.9	25.4	44.9	51.1
Business and asset actions	2,927.9	57.0	2,927.9	57.0
Shareholder activism-related costs	31.4	0.0	61.3	0.0
Other income (expense), net	13.9	21.5	36.8	22.3
Operating Income (Loss)	(2,328.0)	637.2	(1,684.4)	1,304.1
Equity affiliates' income	145.5	143.3	296.1	301.7
Interest expense	42.2	59.9	84.8	113.4
Other non-operating income (expense), net	(18.6)	(9.2)	20.3	(24.0)
Income (Loss) Before Taxes	(2,243.3)	711.4	(1,452.8)	1,468.4
Income tax expense (benefit)	(505.8)	130.5	(365.1)	265.9
Net Income (Loss)	(1,737.5)	580.9	(1,087.7)	1,202.5
Net Income (Loss) Attributable to Noncontrolling Interests	(6.9)	8.5	25.5	20.8
Net Income (Loss) Attributable to Air Products	$ (1,730.6)	$ 572.4	$ (1,113.2)	$ 1,181.7
Per Share Data (U.S. Dollars per share)
Basic earnings(loss) per share attributable to Air Products (in dollars per share)	$ (7.77)	$ 2.57	$ (5.00)	$ 5.31
Diluted earnings (loss) per share attributable to Air Products (in dollars per share)	$ (7.77)	$ 2.57	$ (5.00)	$ 5.30
Weighted Average Common Shares (in millions)
Basic (in shares)	222.8	222.5	222.7	222.5
Diluted (in shares)	222.8	222.7	222.7	222.8