Income Taxes (Details Textuals) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Income Taxes (Textuals) [Abstract]
Net discrete tax benefits		$ 22.7
Expiration date of non-U.S. government sponsored tax incentive programs	2016 through 2019
Tax benefit attributable to non-U.S. government sponsored tax incentive programs	42.9	38.2	41.9
Tax benefit per diluted share attributable to non-U.S. government sponsored tax incentive programs	$ 0.31	$ 0.27	$ 0.29
Total deferred tax assets	529.1	493.8
Total deferred tax liabilities	132.1	128.7
Cumulative undistributed earnings of foreign subsidiaries	2,781.0
Gross unrecognized tax benefits	38.9	40.8	70.3	75.1
Accrued interest and penalties for unrecognized tax benefits	8.1	12.4
Benefits (expense) recognized for interest and penalties related to unrecognized tax benefits	4.0	6.7	(3.1)
Net impact on effective tax rate of unrecognized tax benefits, tax penalities, accrued interest, and offsetting tax assets	22.9
Reasonably possible amount of decrease in unrecognized tax benefits for the next twelve months, upper bound	23.8
Reasonably possible amount of net reduction to income tax provision if unrecognized tax benefits were recognized	$ 9.1
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