Income Taxes (Details Textuals) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Income Taxes (Textuals) [Abstract]
Net discrete tax benefits	$ 22.7	$ 2.1	$ 25.0
Expiration date of non-U.S. government sponsored tax incentive programs	2016 through 2019
Reduction in effective income tax rate due to non-U.S. government sponsored tax incentive programs	(3.90%)	(4.30%)	(5.00%)
Total deferred tax assets	493.8	715.9
Total deferred tax liabilities	128.7	124.4
Cumulative undistributed earnings of foreign subsidiaries	2,427.0
Gross unrecognized tax benefits	40.8	70.3	75.1	66.3
Accrued interest and penalties for unrecognized tax benefits	12.4	20.1
Interest and penalties recognized for unrecognized tax benefits	6.7	(3.1)	9.7
Net impact on effective tax rate of unrecognized tax benefits, tax penalities, accrued interest, and offsetting tax assets	27.1
Reasonably possible amount of increase / (decrease) in unrecognized tax benefits for the next twelve months	$ (16.4)