XML 128 R105.htm IDEA: XBRL DOCUMENT v3.21.1
Common shares - Additional Information (Details)
12 Months Ended
Dec. 31, 2020
Vote
$ / shares
shares
Dec. 31, 2019
shares
Common shares    
Common stock, shares authorized 1,000,000,000  
Common stock, par value | $ / shares $ 0.00025  
Number of votes per common share | Vote 1  
Common stock, shares outstanding 334,401,981 339,165,241