Income and other taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Taxes [Abstract]

Components of income tax expense

Income tax (expense) recovery:

For the years ended December 31	2022		2021
Current tax (expense) recovery:
Current period before undernoted items	$	(127,254)	$	(115,629)
Adjustments to prior years	(324)		(138)
	(127,578)		(115,767)
Deferred tax recovery (expense):
Origination and reversal of temporary differences	9,589		4,360
Adjustments to prior years	(400)		(235)
Changes in tax rates	(23)		3,630
Impact of foreign exchange and other	(1,447)		(2,415)
	7,719		5,340
Total income tax (expense) recovery	$	(119,859)	$	(110,427)

Reconciliation of accounting profit multiplied by applicable tax rates

Income tax expense differs from the amounts that would be obtained by applying the Canadian statutory income tax rate to net income before income taxes as follows:

For the years ended December 31	2022			2021
Income (loss) before income taxes	$	582,147		$	666,338
Deduct earnings of associate	(76,938)			(97,743)
	505,209			568,595
Canadian statutory tax rate	24.5		%	24.5		%
Income tax recovery (expense) calculated at Canadian statutory tax rate	(123,776)			(139,306)
Decrease (increase) in income tax expense resulting from:
Impact of income and losses taxed in foreign jurisdictions	1,346			(24,313)
Utilization of unrecognized loss carryforwards and temporary differences	7,077			7,008
Impact of tax rate changes and tax settlements	(23)			43,515
Impact of foreign exchange	3,783			(3,198)
Other business taxes	(11,065)			(3,691)
Impact of items (expenses) not taxable (deductible) for tax purposes	3,624			8,377
Adjustments to prior years	(724)			(373)
Other	(101)			1,554
Total income tax (expense) recovery	$	(119,859)		$	(110,427)

Effect of temporary difference, unused tax losses and unused tax credits and analysis of change in deferred income tax liabilities

The tax effect of temporary differences that give rise to deferred income tax liabilities and deferred income tax assets is as follows:

As at			Dec 31, 2022						Dec 31, 2021
	Net		Deferred tax assets		Deferred tax liabilities		Net		Deferred tax assets		Deferred tax liabilities
Property, plant and equipment (owned)	$	(403,505)	$	(230,756)	$	(172,749)	$	(427,001)	$	(253,108)	$	(173,893)
Right-of-use assets	(33,477)		(26,486)		(6,991)		(35,571)		(28,047)		(7,524)
Repatriation taxes	(106,989)		—		(106,989)		(106,339)		—		(106,339)
Other	(78,305)		(60,850)		(17,455)		(13,467)		(270)		(13,197)
	(622,276)		(318,092)		(304,184)		(582,378)		(281,425)		(300,953)
Non-capital loss carryforwards	353,986		322,608		31,378		370,642		329,405		41,237
Lease obligations	46,438		35,957		10,481		48,481		37,153		11,328
Share-based compensation	17,068		2,096		14,972		14,063		1,832		12,231
Other	24,141		3,784		20,357		34,656		11,204		23,452
	441,633		364,445		77,188		467,842		379,594		88,248
Net deferred income tax assets (liabilities)	$	(180,643)	$	46,353	$	(226,996)	$	(114,536)	$	98,169	$	(212,705)

As at December 31, 2022, deferred income tax assets have been recognized in respect of non-capital loss carryforwards generated in the United States. These loss carryforwards expire as follows:

	Dec 31 2022
	Gross amount		Tax effect
Expire
Losses generated in 2015 (expires 2035)	$	280,549	$	64,526
Losses generated in 2016 (expires 2036)	432,581		99,494
Losses generated in 2017 (expires 2037)	234,941		54,036
	948,071		218,056
No expiry
Losses generated in 2019	255,244		58,706
Losses generated in 2020	111,894		25,736
Total non-capital loss carryforwards	$	1,315,209	$	302,498

Analysis of the change in deferred income tax assets and liabilities:

			2022						2021
	Net		Deferred tax assets		Deferred tax liabilities		Net		Deferred tax assets		Deferred tax liabilities
Balance, January 1	$	(114,536)	$	98,169	$	(212,705)	$	(75,868)	$	137,524	$	(213,392)
Deferred income tax recovery included in net income	7,719		22,578		(14,859)		5,340		(592)		5,932
Deferred income tax recovery (expense) included in other comprehensive income	(72,440)		(74,394)		1,954		(42,919)		(38,763)		(4,156)
Other	(1,386)		—		(1,386)		(1,089)		—		(1,089)
Balance, December 31	$	(180,643)	$	46,353	$	(226,996)	$	(114,536)	$	98,169	$	(212,705)