Income Taxes (Details Textuals) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Net discrete tax benefits			$ 22.7
Expiration date of non-U.S. government sponsored tax incentive programs	2017 through 2019
Tax benefit attributable to non-U.S. government sponsored tax incentive programs	$ 36.5	$ 42.9	$ 38.2
Tax benefit per diluted share attributable to non-U.S. government sponsored tax incentive programs	$ 0.27	$ 0.31	$ 0.27
Total deferred tax assets	$ 645.1	$ 529.1
Total deferred tax liabilities	128.1	132.1
Cumulative undistributed earnings of foreign subsidiaries	3,059.0
Decrease in valuation allowance	5.6
Gross unrecognized tax benefits	43.9	38.9	$ 40.8	$ 70.3
Accrued interest and penalties for unrecognized tax benefits	5.1	8.1
Benefits recognized for interest and penalties related to unrecognized tax benefits	2.4	$ 4.0	$ 6.7
Net impact on income tax provision if unrecognized tax benefits were recognized, including the recognition of interest and penalties and offsetting tax assets	26.5
Reasonably possible amount of reduction of gross unrecognized tax benefit in the next twelve months	31.0
Reasonably possible amount of net reduction to income tax provision in the next twelve months if unrecognized tax benefits were recognized, including the recognition of interest and penalties and offsetting tax assets	$ 14.5
Earliest open year for income tax examinations, U.S. federal	2012
Earliest open year for income tax examinations, state, local and non-U.S.	2003