Consolidated Comprehensive Income Statement (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Comprehensive Income, net of tax [Abstract]
Net Income	$ 299.1	$ 287.2
Translation adjustments, net of tax	31.4	78.4
Net gain (loss) on derivatives, net of tax	13.1	16.0
Reclassification Adjustments [Abstract]
Derivatives, net of tax	(11.9)	(14.3)
Pension and postretirement plans, net of tax	20.0	24.4
Total Other Comprehensive Income (Loss)	52.6	104.5
Comprehensive Income	351.7	391.7
Net income attributable to noncontrolling interests	8.9	8.9
Other Comprehensive Income Attributable to Noncontrolling Interests	(1.1)	1.1
Comprehensive Income Attributable to Air Products	$ 343.9	$ 381.7