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Debt and Other Financing Arrangements - Additional Information (Details)
$ in Millions
3 Months Ended 12 Months Ended
Jun. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Debt Instrument [Line Items]          
Payments of Debt Issuance Costs     $ 11.7 $ 19.1 $ 11.1
Write off of Deferred Debt Issuance Cost     1.3 2.1 5.9
Debt Issuance Costs, Noncurrent, Net   $ 22.3 27.2 22.3  
Amortization of Debt Issuance Costs     $ 5.7 3.4 3.0
Debt Covenants [Abstract]          
Consolidated total leverage ratio, maximum allowed under Line of Credit Facility     3.50    
Minimum consolidated interest coverage ratio     1.50    
Extinguishment of Debt Disclosures [Abstract]          
Loss (Gain) on Extinguishment of Debt $ 1.3   $ 1.3 3.2 19.0
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities     328.7 403.0 759.3
Tranche B Term Loan due 2024 [Member]          
Debt Instrument [Line Items]          
Payments of Debt Issuance Costs     1.0 12.9  
8% Senior Notes due 2025 [Member]          
Debt Instrument [Line Items]          
Payments of Debt Issuance Costs     $ 8.7 1.4  
Extinguishment of Debt Disclosures [Abstract]          
Debt Instrument, Redemption Price, Percentage     100.00%    
Revolving Credit Facility and Receivables Facility [Member]          
Debt Instrument [Line Items]          
Payments of Debt Issuance Costs     $ 2.3 4.6  
Other Noncurrent Assets [Member]          
Debt Instrument [Line Items]          
Debt Issuance Costs, Noncurrent, Net   5.1 $ 4.9 $ 5.1  
Senior Notes due 2020 [Member]          
Extinguishment of Debt Disclosures [Abstract]          
Extinguishment of Debt, Amount         $ 478.5
Debt Instrument, Redemption Price, Percentage         103.328%
Loss (Gain) on Extinguishment of Debt         $ 17.8
Tranche B Term Loan [Member]          
Extinguishment of Debt Disclosures [Abstract]          
Loss (Gain) on Extinguishment of Debt   2.6      
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities   $ 315.8