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Revenue (Tables)
12 Months Ended
Dec. 31, 2019
Text block [abstract]  
Significant Increases (Decreases) in Contract Assets and Deferred Revenue
Significant increases (decreases) in contract assets and deferred revenue in the year are as follows:
 
 
  
 
 
  
For the year ended
 
    
 
  
 
 
  
        December 31, 2019
 
  
            December 31, 2018
 
      
 
  
 
 
  
Contract
 
  
Deferred
 
  
Contract
 
 
Deferred
 
 
  
 
 
  
Assets
 
  
Revenue
 
  
Assets
 
 
Revenue
 
      
  
  
Note
 
  
$
 
  
$
 
  
$
 
 
$
 
Acquisitions
  
   
  
 
1.1
 
  
 
4.6
 
  
 
0.7
 
 
 
7.2
 
Discontinued operations and disposition of subsidiaries
  
 
8
 
  
 
-
 
  
 
-
 
  
 
(15.3
 
 
(59.3