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Income and other taxes (Tables) | 12 Months Ended
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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) |

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