Income Taxes - Current and Deferred Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Current Federal Tax Expense (Benefit)									$ 0.5	$ (1.7)	$ (4.7)
Current State and Local Tax Expense (Benefit)									0	(1.4)	0.6
Current Foreign Tax Expense (Benefit)									11.6	13.4	10.1
Current Income Tax Expense (Benefit)									12.1	10.3	6.0
Deferred Income Tax Expense (Benefit)									(5.7)	(7.7)	(0.5)
Income tax expense	$ 2.0	$ 0.3	$ 2.6	$ 1.5	$ (3.3)	$ 2.0	$ 0	$ 3.9	$ 6.4	$ 2.6	$ 5.5