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Environmental and other provisions (Tables)
12 Months Ended
Dec. 31, 2022
Disclosure of other provisions [abstract]  
Disclosure of detailed information about changes in provisions [Table Text Block]
    Decommissioning,
restoration
and similar
liabilities
    Deferred
share
units
3
    Restricted
share
units1, 3 
    Performance
share
units
3
    Other2     Total  
Balance, January 1, 2022 $ 467,800   $ 8,107   $ 10,889   $ 5,402   $ 10,320   $ 502,518  
Net additional provisions made   13,440     1,184     3,866     239     3,918     22,647  
Disbursements   (15,460 )   -     (6,232 )   (1,115 )   (3,633 )   (26,440 )
Unwinding of discount (note 6g)   8,498     -     -     -     -     8,498  
Effect of change in discount rate   (184,508 )   -     -     -     -     (184,508 )
Effect of foreign exchange   (13,368 )   (386 )   (352 )   (287 )   (392 )   (14,785 )
Effect of change in share price   -     (2,033 )   (1,316 )   (1,250 )   -     (4,599 )
Balance, December 31, 2022 $ 276,402   $ 6,872   $ 6,855   $ 2,989   $ 10,213   $ 303,331  
    Decommissioning,
restoration
and similar
liabilities
    Deferred
share units
(note 25a)
    Restricted
share units1
(note 25a)
    Performance
share units
(note 25a)
    Other2     Total  
Balance, January 1, 2021 $ 343,132   $ 8,719   $ 10,449   $ 2,030   $ 1,144   $ 365,474  
Net additional provisions made   172,023     1,233     5,523     2,993     9,182     190,954  
Disbursements   (21,663 )   (2,053 )   (6,143 )   -     (5 )   (29,864 )
Unwinding of discount (note 6g)   4,988     -     -     -     -     4,988  
Effect of change in estimate to inflation rates3   (23,173 )   -     -     -     -     (23,173 )
Effect of change in discount rate   (9,982 )   -     -     -     -     (9,982 )
Effect of foreign exchange   2,475     (18 )   316     (10 )   (1 )   2,762  
Effect of change in share price   -     226     744     389     -     1,359  
Balance, December 31, 2021 $ 467,800   $ 8,107   $ 10,889   $ 5,402   $ 10,320   $ 502,518  
Disclosure of detailed information about provisions [Table Text Block]
December 31, 2022   Decommissioning,
restoration
and similar
liabilities
    Deferred
share units
    Restricted
share
units1 
    Performance
share
units
    Other     Total  
Current (note 14) $ 4,162   $ 6,872   $ 4,836   $ 1,736   $ 6,485   $ 24,091  
Non-current   272,240     -     2,019     1,253     3,728     279,240  
  $ 276,402   $ 6,872   $ 6,855   $ 2,989   $ 10,213   $ 303,331  
December 31, 2021   Decommissioning,
restoration
and similar
liabilities
    Deferred
share units
(note 25a)
    Restricted
share units1
(note 25a)
    Performance
share units
(note 25a)
    Other     Total  
Current (note 14) $ 16,759   $ 8,107   $ 5,061   $ 4,622   $ 6,468   $ 41,017  
Non-current   451,041     -     5,828     780     3,852     461,501  
  $ 467,800   $ 8,107   $ 10,889   $ 5,402   $ 10,320   $ 502,518