Income Taxes (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Income Tax Contingency [Line Items]
Unrecognized tax benefit more likely than not percentage threshold	50.00%
Unrecognized tax benefits	$ 91.0
Unrecognized tax benefits that would impact effective tax rate	66.8
Interest expense or penalties, uncertain tax positions	0.3	$ 0.0
Accrued interest, uncertain tax positions	$ 0.3	$ 0.0	$ 0.0
Internal Revenue Service (IRS) [Member]
Income Tax Contingency [Line Items]
Earliest year subject to examination	2000