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Share-based compensation expense (Tables)
12 Months Ended
Dec. 31, 2021
Share-based compensation expense  
Schedule of Share-based compensation expense

  

  

2021

  

  

2020

  

Stock options and restricted share units

$

8.0

$

5.6

Deferred share units

 

3.2

 

4.0

$

11.2

$

9.6