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Commitments (Tables)
 12 Months Ended
Dec. 31, 2019
Text block [abstract]  
Additional information about leasing activities for lessee
 
  
Total
 
  
Less than 1 Year
 
  
1 to 3 Years
 
  
After 3 Years
 
  
  
$
 
  
$
 
  
$
 
  
$
 
     
Variable lease payments
  
 
269.6
 
  
 
47.6
 
  
 
82.4
 
  
 
139.6
 
Short-term and low value lease payments
  
 
4.0
 
  
 
2.6
 
  
 
1.4
 
  
 
-
 
Leases not commenced but committed
  
 
50.6
 
  
 
2.3
 
  
 
10.2
 
  
 
38.1
 
Purchase obligations
  
 
67.6
 
  
 
43.9
 
  
 
20.5
 
  
 
3.2
 
     
 
  
 
391.8
 
  
 
96.4
 
  
 
114.5
 
  
 
180.9