Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Operating Activities
Net Income (Loss)	$ (1,087.7)	$ 1,202.5
Less: Net income attributable to noncontrolling interests	25.5	20.8
Net income (loss) attributable to Air Products	(1,113.2)	1,181.7
Adjustments to reconcile income to cash provided by operating activities:
Depreciation and amortization	750.4	710.0
Deferred income taxes	(540.1)	6.9
Tax reform repatriation	(34.9)	0.0
Business and asset actions	2,927.9	57.0
Undistributed earnings of equity method investments	(129.4)	(118.2)
Gain on sale of assets and investments	(12.3)	(18.2)
Share-based compensation	54.7	28.5
Noncurrent lease receivables	28.0	40.2
Other adjustments	(87.8)	26.5
Working capital changes that provided (used) cash, excluding effects of acquisitions:
Trade receivables	(66.9)	30.9
Inventories	(24.4)	(72.7)
Other receivables	6.5	(31.6)
Payables and accrued liabilities	(47.7)	(301.0)
Other working capital	(571.0)	(111.7)
Cash Provided by Operating Activities	1,139.8	1,428.3
Investing Activities
Additions to plant and equipment, including long-term deposits	(4,009.1)	(3,114.9)
Investment in and advances to unconsolidated affiliates	(365.4)	0.0
Investment in financing receivables	(35.8)	(392.4)
Proceeds from sale of assets and investments	36.5	20.2
Purchases of investments	(117.6)	(136.4)
Proceeds from investments	11.1	367.4
Other investing activities	60.9	30.1
Cash Used for Investing Activities	(4,419.4)	(3,226.0)
Financing Activities
Long-term debt proceeds	2,002.5	3,649.0
Payments on long-term debt	(332.3)	(64.7)
Increase (Decrease) in commercial paper and short-term borrowings	645.6	(131.9)
Dividends paid to shareholders	(787.4)	(777.9)
Proceeds from stock option exercises	1.1	5.7
Investments by noncontrolling interests	355.7	142.6
Other financing activities	(60.1)	(110.3)
Cash Provided by Financing Activities	1,825.1	2,712.5
Effect of Exchange Rate Changes on Cash	(33.8)	3.2
Increase (Decrease) in cash and cash items	(1,488.3)	918.0
Cash and cash items – Beginning of year	2,979.7	1,617.0
Cash and Cash Items – End of Period	$ 1,491.4	$ 2,535.0