Annual report pursuant to Section 13 and 15(d)

Income Taxes Income Taxes - Schedule of Net Operating Loss Carryforwards (Details)

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Income Taxes Income Taxes - Schedule of Net Operating Loss Carryforwards (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
State    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards $ 176.5 $ 152.0
Foreign    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards 83.2 79.9
Federal    
Operating Loss Carryforwards [Line Items]    
Operating Loss Carryforwards $ 30.5 $ 0.0