Consolidated Comprehensive Income Statement (USD $) In Millions, unless otherwise specified	3 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Other Comprehensive Income (Loss), net of tax [Abstract]
Net Income	$ 337.5us-gaap_ProfitLoss	$ 299.1us-gaap_ProfitLoss
Translation adjustments, net of tax	(244.4)	31.4
Net gain (loss) on derivatives, net of tax	(23.8)	13.1
Pension and postretirement benefits, net of tax	0	0
Reclassification Adjustments [Abstract]
Currency translation adjustment	0	0
Derivatives, net of tax	13.5	(11.9)
Pension and postretirement benefits, net of tax	20.9	20.0
Total Other Comprehensive Income (Loss)	(233.8)	52.6
Comprehensive Income	103.7	351.7
Net income attributable to noncontrolling interests	12.9	8.9
Other Comprehensive Income (Loss) Attributable to Noncontrolling Interests	(5.1)	(1.1)
Comprehensive Income Attributable to Air Products	$ 95.9us-gaap_ComprehensiveIncomeNetOfTax	$ 343.9us-gaap_ComprehensiveIncomeNetOfTax

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