Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Sep. 30, 2013
Change in weighted average enacted income tax rate			0.52%
Income Tax Expense (Benefit)	$ 3.1	$ 2.5	$ 3.4	$ 0.9
Valuation allowance, change				6.3
Unrecognized Tax Benefits	3.6		3.6		3.7
Accrued interest related to uncertain tax positions	0.9		0.9		0.9
Income Tax Examination, Penalties and Interest Expense					0
Valuation Allowance of Deferred Tax Assets [Member]
Valuation allowance, change				11.1
Effect of Change in Marginal Tax Rate [Member]
Income Tax Expense (Benefit)	(2.0)	0	(2.0)	0
Valuation Allowance of Deferred Tax Assets [Member]
Income Tax Expense (Benefit)	0	(1.3)	0	(0.5)
Discontinued Operation, Tax Effect of Discontinued Operation				$ 4.3