Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Activities
Net Income	$ 586.8	$ 558.5
Less: Net income attributable to noncontrolling interests	18.1	14.4
Net Income Attributable to Air Products	568.7	544.1
Income from discontinued operations	(2.5)	(39.2)
Income from continuing operations attributable to Air Products	566.2	504.9
Adjustments to reconcile income to cash provided by (used for) operating activities:
Depreciation and amortization	444.7	408.3
Deferred income taxes	32.8	53.1
Benefit from Spanish tax ruling	0	(58.3)
Undistributed earnings of unconsolidated affiliates	(26.3)	(25.0)
Share-based compensation	22.4	27.4
Noncurrent capital lease receivables	(123.2)	(109.9)
Other adjustments	92.9	66.4
Working capital changes that provided (used) cash, excluding effects of acquisitions and divestitures:
Trade receivables	17.8	(13.9)
Inventories	53.1	(19.9)
Contracts in progress, less progress billings	(41.4)	(1.9)
Other receivables	(55.7)	14.2
Payables and accrued liabilities	(150.3)	5.9
Other working capital	4.1	(96.7)
Pension plan contributions	(238.9)	(23.4)
Cash Provided by (Used for) Operating Activities	598.2	731.2
Investing Activities
Additions to plant and equipment	(707.3)	(734.9)
Acquisitions, less cash acquired	0	(26.4)
Investment in and advances to unconsolidated affiliates	0.2	(21.2)
Proceeds from sale of assets and investments	6.4	12.5
Change in restricted cash	0	6.4
Other investing activities	(1.5)	0
Cash Provided by (Used for) Investing Activities	(702.2)	(763.6)
Financing Activities
Long-term debt proceeds	504.0	400.1
Payments on long-term debt	(392.0)	(8.6)
Net increase (decrease) in commercial paper and short-term borrowings	604.4	(190.2)
Dividends paid to shareholders	(268.9)	(244.1)
Purchase of treasury shares	(461.6)	(53.1)
Proceeds from stock option exercises	62.7	75.9
Excess tax benefit from share-based compensation	14.3	18.5
Payment for subsidiary shares from noncontrolling interests	(0.3)	(58.4)
Other financing activities	(19.9)	(13.2)
Cash Provided by (Used for) Financing Activities	42.7	(73.1)
Discontinued Operations
Cash provided by operating activities	9.8	20.0
Cash provided by (used for) investing activities	(0.9)	(7.7)
Cash provided by (used for) financing activities	0	0
Cash Provided by (Used for) Discontinued Operations	8.9	12.3
Effect of Exchange Rate Changes on Cash	(0.4)	3.7
Increase (Decrease) in Cash and Cash Items	(52.8)	(89.5)
Cash and Cash Items - Beginning of Year	454.4	422.5
Cash and Cash Items - End of Period	401.6	333.0
Less: Cash and Cash Items - Discontinued Operations	0	13.5
Cash and Cash Items - Continuing Operations	$ 401.6	$ 319.5