Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2014	Mar. 31, 2013	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Effective income tax rate					(671.10%)	18.00%
Discrete income tax (benefit)	$ (1.1)	$ (0.2)	$ (0.4)	$ (0.1)	$ (1.3)
Percentage points that reduced effective tax rate					(714.0)	(19.1)
Unrecognized tax benefits that would impact effective tax rate	2.0				2.0
Income tax penalties and interest accrued	0.4				0.4		0.6
Accumulated undistributed foreign earnings	25.7				25.7
Minimum [Member]
Income Tax Contingency [Line Items]
Estimated unrecognized deferred tax liability	1.5				1.5
Maximum [Member]
Income Tax Contingency [Line Items]
Estimated unrecognized deferred tax liability	$ 2.5				$ 2.5