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Contingencies, Environmental and Legal Matters (Details) - USD ($)
$ in Millions
8 Months Ended 10 Months Ended 12 Months Ended
Dec. 31, 2013
Oct. 31, 2013
Dec. 31, 2015
Dec. 31, 2014
Successor [Member]        
Loss Contingencies [Line Items]        
Legal settlement $ 0.0   $ 16.0 $ 0.0
Loss Contingency Accrual [Roll Forward]        
AROs, beginning of period 0.0   18.5 4.8
Acquisitions 4.8   0.4 13.2
Additional obligations incurred 0.0   0.0 0.5
Accretion expense 0.0   1.0 0.7
Remeasurements 0.0   (0.2) 0.0
Payments/ settlements 0.0   (0.4) (0.2)
Foreign currency adjustments 0.0   (1.8) (0.5)
AROs, end of period $ 4.8   $ 17.5 $ 18.5
Predecessor [Member]        
Loss Contingencies [Line Items]        
Legal settlement   $ 0.0    
Loss Contingency Accrual [Roll Forward]        
AROs, beginning of period   2.3    
Acquisitions   0.0    
Additional obligations incurred   0.0    
Accretion expense   0.1    
Remeasurements   0.0    
Payments/ settlements   (0.1)    
Foreign currency adjustments   (0.1)    
AROs, end of period   $ 2.2