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Leases (Tables)
 12 Months Ended
Dec. 31, 2020
Leases [Abstract]  
Components of Lease Expense
The components of lease expense were as follows:
 
(in millions)
   
Twelve Months
Ended December 31
     
Twelve Months
Ended December 31
  
    
2020
     
2019
  
Finance lease cost:
                  
Amortization of
right-of-use
assets
    $ 1.0      $ 1.7  
Interest on lease liabilities
      0.0        0.0  
    
 
 
     
 
 
  
Total finance lease cost
      1.0        1.7  
Operating lease cost
      12.8        12.1  
Short-term lease cost
      3.2        2.5  
Variable lease cost
      0.3        0.3  
    
 
 
     
 
 
  
Total lease cost
    $ 17.3      $ 16.6  
    
 
 
     
 
 
  
Supplemental Cash Flow Information Related to Leases
Supplemental cash flow information related to leases is as follows:
 
(in millions)
   
Twelve Months
Ended December 31
     
Twelve Months
Ended December 31
  
    
2020
     
2019
  
Cash paid for amounts included in the measurement of lease liabilities:
      
Operating cash flows from operating leases
    $ 15.9      $ 14.3  
Operating cash flows from finance leases
      1.2        2.1  
Finance cash flows from finance leases
      0.0        0.0  
Right-of-use
assets obtained in exchange for new lease obligations:
      
Operating leases
    $ 5.7      $ 4.3  
Finance leases
      0.0        0.0  
Supplemental Balance Sheet Information Related to Leases
Supplemental balance sheet information related to leases is as follows:
 
(in millions except lease term and discount rate)
  
December 31
2020
 
 
December 31
2019
 
Operating leases:
                  
Operating lease
right-of-use
assets
    $ 40.1      $ 32.4  
    
 
 
     
 
 
  
Current portion of operating lease liabilities
    $ 11.3      $ 10.6  
Operating lease liabilities, net of current portion
      28.9        21.9  
    
 
 
     
 
 
  
Total operating lease liabilities
    $ 40.2      $ 32.5  
    
 
 
     
 
 
  
 
 
 
 
 
 
 
 
 
Finance leases:
                  
Property, plant and equipment at cost
    $ 9.0      $ 9.9  
Accumulated depreciation
      (8.0 )
 
 
 		      (8.1 )
 
 
 
    
 
 
     
 
 
  
Net property, plant and equipment
    $ 1.0    
$
 1.8  
    
 
 
    
 
 
  
Current portion of finance leases
   
$
 0.5    
$
1.0
  
Finance leases, net of current portion
      0.1      
0.5
  
    
 
 
    
 
 
  
Total finance lease liabilities
   
$
 0.6    
$
 1.5  
    
 
 
    
 
 
  
 
 
 
 
 
 
 
 
 
Weighted average remaining lease term:
                 
Operating leases
      4.1 years       3.3
 years
  
Finance leases
      1.1 years       1.7
years
  
Weighted average discount rate:
                 
Operating leases
      3.0 %      3.1
% 
Finance leases
      2.6
% 
     2.4
% 
Maturities of Lease Liabilities
Maturities of lease liabilities were as follows as at December 31, 2020:
 
(in millions)
   
Operating
Leases
     
Finance
Leases
  
Within one year
    $ 11.4     
$
 0.5  
Year two
      9.4        0.1  
Year three
      8.2        0.0  
Year four
      5.5        0.0  
Year five
      3.8        0.0  
Thereafter
      4.6        0.0  
    
 
 
     
 
 
  
Total lease payments
      42.9        0.6  
Less imputed interest
      (2.7 )       0.0  
    
 
 
     
 
 
  
Total
   
$
 40.2     
$
 0.6  
    
 
 
     
 
 
  
As of December 31, 2020, additional operating and finance leases that have not yet commenced are $
0.0
 million.
Future lease payment for all
non-cancellable
operating and finance leases as of December 31, 2019 were as follows:
 
(in millions)
   
Operating

Leases
     
Finance

Leases
  
Within one year
   
$
 10.8     
$
 1.1  
Year two
      9.1        0.4  
Year three
      5.8       
0.1
  
Year four
      4.4        0.0  
Year five
      2.1        0.0  
Thereafter
      2.5        0.0  
    
 
 
     
 
 
  
Total lease payments
      34.7        1.6  
Less imputed interest
      (2.2
) 
      (0.1
) 
    
 
 
     
 
 
  
Total
   
$
 32.5     
$
 1.5