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Schedule of Debt (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Long-term debt, current $ 33.6 $ 32.8
Long-term debt 117.1 120.2
Senior Notes [Member]    
Debt Instrument [Line Items]    
Long-term debt, face amount 74.3 74.3
Long-term debt, interest 42.8 45.9
Long-term debt, current 6.1 6.1
Long-term debt 117.1 120.2
Payment in Kind (PIK) Note [Member]    
Debt Instrument [Line Items]    
Long-term debt, carrying amount 0.0 0.0
Long-term debt, current 27.5 26.7
Long-term debt $ 0.0 $ 0.0