Income Taxes - Schedule of Liabilities for Income Tax (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Accrued Income Taxes, Current	$ 0.0	$ 7.8
Deferred Income Tax Liabilities	0.0	21.5
Unrecognized Tax Benefits	3.8	7.2	$ 6.8	$ 6.4
Liabilities for Income Taxes	$ 3.8	$ 36.5