Income Taxes - Schedule of Liabilities for Income Tax (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
Accrued Income Taxes, Current	$ 1.5	$ 0
Deferred Income Tax Liabilities	0	15.1
Unrecognized Tax Benefits	6.8	6.4	6.2	7.8
Liabilities for Income Taxes	$ 8.3	$ 21.5