XML 101 R54.htm IDEA: XBRL DOCUMENT v3.21.1
Provisions (Tables)
 12 Months Ended
Dec. 31, 2020
Disclosure of other provisions [abstract]  
Disclosure of detailed information about changes in provisions [Table Text Block]
   

Decommis-

sioning,

restoration

and similar

liabilities

    

Deferred

share units

(note 24a)

    

Restricted

share

units1 (note

24a)

    

Performan-

ce share

units (note

24a)

     Other     Total  
Balance, January 1, 2020 $ 302,116   $ 3,876   $ 5,477   $ —   $ 2,956   $ 314,425  
Net additional provisions made   5,868     1,628     3,642     1,257     15     12,410  
Amounts used   (18,737 )   (497 )   (2,646 )   —     (1,824 )   (23,704 )
Unwinding of discount (note 6g)   3,543     —     —     —     —     3,543  
Effect of change in discount rate   43,180     —     —     —     —     43,180  
Effect of foreign exchange   7,162     191     116     43     (3 )   7,509  
Effect of change in share price   —     3,521     3,860     730     —     8,111  
Balance, December 31, 2020 $ 343,132   $ 8,719   $ 10,449   $ 2,030   $ 1,144   $ 365,474  
 
    Decommis-sioning, restoration and similar liabilities     Deferred share units (note 24a)     Restricted share units1 (note 24a)     Performance share units (note 24a)     Other     Total  
Balance, January 1, 2019 $ 202,024   $ 4,288   $ 12,201   $ —   $ 411   $ 218,924  
Net additional provisions made   68,881     1,479     2,885     —     2,882     76,127  
Amounts used   (4,136 )   (1,668 )   (9,380 )   —     (341 )   (15,525 )
Unwinding of discount (note 6g)   4,392     —     —     —     —     4,392  
Effect of change in discount rate   23,635     —     —     —     —     23,635  
Effect of foreign exchange   7,320     99     225     —     4     7,648  
Effect of change in share price   —     (322 )   (454 )   —     —     (776 )
Balance, December 31, 2019 $ 302,116   $ 3,876   $ 5,477   $ —   $ 2,956   $ 314,425  

1 Certain amounts relating to the Arizona segment are capitalized.
Disclosure of detailed information about provisions [Table Text Block]
December 31, 2020   Decommis-sioning, restoration and similar liabilities     Deferred share units (note 24a)     Restricted share units1 (note 24a)     Performance share units (note 24a)     Other     Total  
Current (note 14) $ 20,308   $ 8,719   $ 4,648   $ —   $ —   $ 33,675  
Non-current   322,824     —     5,801     2,030     1,144     331,799  
  $ 343,132   $ 8,719   $ 10,449   $ 2,030   $ 1,144   $ 365,474