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Severance, acquisition and other costs (Tables)
12 Months Ended
Dec. 31, 2020
Analysis of income and expense [abstract]  
Disclosure of severance, acquisition and other costs
FOR THE YEAR ENDED DECEMBER 31 2020 2019
Severance (35) (63)
Acquisition and other (81) (51)
Total severance, acquisition and other costs (116) (114)