Basis of Presentation Prior Period Corrections (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Loss before income taxes and discontinued operations	$ (23.0)	$ (5.4)	$ (27.9)	$ (15.5)
Accumulated Deficit | Accounting Standards Update 2016-16 [Member] | New Accounting Pronouncement, Early Adoption, Effect [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption					$ (0.1)
Restatement Adjustment [Member] | Incentive Compensation Accrual [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Loss before income taxes and discontinued operations	$ 1.1
Other Noncurrent Assets [Member] | Accounting Standards Update 2016-16 [Member] | New Accounting Pronouncement, Early Adoption, Effect [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption					$ (0.1)