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Segments - Schedule of Reconciliation of the Company's Segment Operating Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]    
Total operating income (loss) $ 1.7 $ (21.8)
Restructuring expense 6.2 11.7
Other operating income (expense) - net   (0.2)
Segment Operating Income (Loss)    
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]    
Total operating income (loss) 14.0 (13.6)
Reconciliation of Company’s Segment Operating Income (Loss)    
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]    
Total operating income (loss) 1.7 (21.8)
Unallocated corporate expenses (9.6) (9.1)
Restructuring expense (2.2) (0.2)
Other operating income (expense) - net $ (0.5) $ 1.1