Income Taxes (Details Textuals) (USD $) In Millions	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2008
Income Tax Contingency [Line Items]
Gross Unrecognized Tax Benefits	$ 75.1	$ 66.3	$ 116.7	$ 125.8
Net Unrecognized Tax Benefits	30.2	15.2	67.6
Income Taxes (Textuals) [Abstract]
Discrete tax expenses		9.6	4.2
Net discrete tax benefits	25.0
Discrete tax benefits		27.2	20.5
Total deferred tax assets	682.8	627.1
Total deferred tax liabilities	114.2	105.7
Cumulative undistributed earnings of foreign subsidiaries	1,906.0
Change in valuation allowance	6.1	(17.1)
Reasonably possible amount of increase / (decrease) in unrecognized tax benefits for the next twelve months	(5.4)
Reasonably possible amount of increase / (decrease) in offsetting tax benefits for the next twelve months	2.4
Accrued interest and penalties for unrecognized tax benefits	16.9	26.6
Interest and penalties recognized for unrecognized tax benefits	9.7	0.9	(2.4)
Continuing Operations [Member]
Income Tax Contingency [Line Items]
Gross Unrecognized Tax Benefits	75.1	57.5	85.2
Net Unrecognized Tax Benefits	$ 30.2	$ 9.5	$ 40.9