Environmental and other provisions (Tables)

12 Months Ended

Dec. 31, 2021

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 23a)			Restricted share units1 (note 23a)			Performan-ce share units (note 23a)			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 5g)		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

		Decommis-sioning, restoration and similar liabilities			Deferred share units (note 23a)			Restricted share units1 (note 23a)			Performan-ce share units (note 23a)		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
Disbursements		(18,737	)		(497	)		(2,646	)		-		(1,824	)		(23,704	)
Unwinding of discount (note 5g)		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

Disclosure of detailed information about provisions [Table Text Block]

December 31, 2021		Decommis-sioning, restoration and similar liabilities		Deferred share units (note 23a)		Restricted share units1 (note 23a)		Performan-ce share units (note 23a)		Other		Total
Current (note 13)	$	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

December 31, 2020		Decommis-sioning, restoration and similar liabilities		Deferred share units (note 23a)		Restricted share units1 (note 23a)		Performan-ce share units (note 23a)		Other		Total
Current (note 13)	$	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