Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Operating Activities
Net Income	$ 256.3	$ 275.9
Less: Net income attributable to noncontrolling interests	8.2	7.3
Net income attributable to Air Products	248.1	268.6
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	212.5	217.6
Deferred income taxes	26.3	(2.3)
Undistributed earnings of unconsolidated affiliates	(10.4)	14.9
Gain on sale of assets and investments	(4.9)	(0.8)
Share-based compensation	11.8	10.2
Noncurrent capital lease receivables	(61.2)	(37.7)
Net loss on Airgas transaction		43.5
Payment of acquisition-related costs		(12.0)
Other adjustments	17.9	30.2
Working capital changes that provided (used) cash, excluding effects of acquisitions and divestitures:
Trade receivables	27.8	(11.5)
Inventories	(23.3)	(10.2)
Contracts in progress, less progress billings	(9.6)	9.8
Other receivables	8.2	11.6
Payables and accrued liabilities	(58.2)	(229.3)
Other working capital	45.7	34.0
Cash Provided by Operating Activities	430.7	336.6
Investing Activities
Additions to plant and equipment	(349.7)	(306.9)
Investment in and advances to unconsolidated affiliates	(21.2)
Proceeds from sale of assets and investments	11.9	33.2
Change in restricted cash	2.0	(3.1)
Cash Used for Investing Activities	(357.0)	(276.8)
Financing Activities
Long-term debt proceeds	400.1	38.5
Payments on long-term debt	(3.3)	(137.6)
Net decrease in commercial paper and short-term borrowings	(315.4)	(33.3)
Dividends paid to shareholders	(121.9)	(104.8)
Proceeds from stock option exercises	7.9	36.8
Excess tax benefit from share-based compensation	2.8	8.5
Payment for subsidiary shares from noncontrolling interests	(58.4)
Other financing activities	(0.1)	1.3
Cash Used for Financing Activities	(88.3)	(190.6)
Effect of Exchange Rate Changes on Cash	(0.6)	3.7
Decrease in Cash and Cash Items	(15.2)	(127.1)
Cash and Cash Items - Beginning of Year	422.5	374.3
Cash and Cash Items - End of Period	$ 407.3	$ 247.2