Variable Interest Entities - NGHC Joint Venture By Balance Sheet Items (Details) - USD ($) $ in Millions		Dec. 31, 2025	Sep. 30, 2025
Assets
Cash and cash items		$ 1,026.4	$ 1,856.0
Trade receivables, net		1,894.9	1,901.2
Prepaid expenses		163.8	174.9
Other receivables and current assets		757.4	689.5
Total Current Assets		5,103.2	5,825.8
Plant and equipment, net		26,142.1	25,337.8
Operating lease right-of-use assets, net		925.2	944.0
Other noncurrent assets		1,100.0	1,021.3
Total Noncurrent Assets		36,137.5	35,233.7
Total Assets	[1]	41,240.7	41,059.5
Liabilities
Payables and accrued liabilities		3,035.3	3,237.7
Accrued income taxes		174.5	179.4
Short-term borrowings		66.7	34.7
Total Current Liabilities		3,497.9	4,218.6
Noncurrent operating lease liabilities		607.0	616.0
Other noncurrent liabilities		1,341.5	1,348.1
Deferred income taxes		661.9	579.6
Total Noncurrent Liabilities		19,905.7	19,491.1
Total Liabilities	[1]	23,403.6	23,709.7
Equity
Accumulated other comprehensive income		(1,977.1)	(2,087.8)
Noncontrolling interests	[1]	2,425.8	2,324.9
Variable Interest Entity, Primary Beneficiary | NEOM Green Hydrogen Company
Assets
Cash and cash items		128.7	40.3
Trade receivables, net		1.4	1.1
Prepaid expenses		18.0	20.7
Other receivables and current assets		133.5	107.2
Total Current Assets		281.6	169.3
Plant and equipment, net		6,995.2	6,593.9
Operating lease right-of-use assets, net		213.5	218.0
Other noncurrent assets		194.3	153.5
Total Noncurrent Assets		7,403.0	6,965.4
Total Assets		7,684.6	7,134.7
Liabilities
Payables and accrued liabilities		201.1	201.7
Accrued income taxes		3.0	1.2
Short-term borrowings		36.7	24.0
Total Current Liabilities		240.8	226.9
Long-term debt		5,027.1	4,677.6
Noncurrent operating lease liabilities		17.9	17.8
Other noncurrent liabilities		2.0	1.6
Deferred income taxes		17.0	13.8
Total Noncurrent Liabilities		5,064.0	4,710.8
Total Liabilities		5,304.8	4,937.7
Equity
Accumulated other comprehensive income		48.8	38.3
Noncontrolling interests		$ 1,580.2	$ 1,493.6

[1] Includes balances associated with a consolidated variable interest entity ("VIE"), including amounts reflected in "Total Assets" that can only be used to settle obligations of the VIE of $7,684.6 and $7,134.7 as of 31 December 2025 and 30 September 2025, respectively, as well as liabilities of the VIE reflected within "Total Liabilities" for which creditors do not have recourse to the general credit of Air Products of $5,304.8 and $4,937.7 as of 31 December 2025 and 30 September 2025, respectively. Refer to Note 3, Variable Interest Entities, for additional information regarding the NEOM Green Hydrogen Company joint venture.