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Debt - Credit Facility (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Oct. 02, 2017
Dec. 31, 2016
Line of Credit Facility [Line Items]              
Corporate Credit Agreement   $ 0.0   $ 0.0      
Line of Credit Facility, Remaining Borrowing Capacity   150.0   150.0   $ 200.0  
Line of Credit Facility, Commitment Fee Percentage 0.50%            
Loss on extinguishment of debt, net   0.0 $ 11.4 0.0 $ 14.2    
Receivables facility amount outstanding   0.0   0.0     $ 89.5
Letters of Credit Outstanding, Amount   6.3   6.3      
Receivables facility remaining borrowing capacity   96.4   96.4      
Receivables facility maximum borrowing availability   102.7   $ 102.7      
Accounts Receivable Facility, Renewal Term       364      
Receivables facility maximum borrowing capacity   $ 120.0   $ 120.0      
Standby Letters of Credit [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Remaining Borrowing Capacity           30.0  
Bridge Loan [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Remaining Borrowing Capacity           $ 25.0  
Base Rate [Member]              
Line of Credit Facility [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage           2.75%  
Base Rate [Member] | Minimum [Member]              
Line of Credit Facility [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage           2.00%  
London Interbank Offered Rate (LIBOR) [Member]              
Line of Credit Facility [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage           3.75%  
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]              
Line of Credit Facility [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage           1.00%  
Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Loss on extinguishment of debt, net $ 1.0