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Income and other taxes (Tables) | 12 Months Ended
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Dec. 31, 2021
Income Taxes [Abstract] |
Components of income tax expense | Income tax (expense) recovery:
For the years ended December 31 | 2021 | 2020
Current tax (expense) recovery: |  |
Current period before undernoted items | $ | (115,629) |  | $ | (27,759) |
Adjustments to prior years | (138) |  | 2,563 |
| (115,767) |  | (25,196) |
Deferred tax recovery (expense): |  |
Origination and reversal of temporary differences | 4,360 |  | 89,301 |
Adjustments to prior years | (235) |  | (1,067) |
Changes in tax rates | 3,630 |  | (5,031) |
Other | (2,415) |  | 4,098 |
| 5,340 |  | 87,301 |
Total income tax (expense) recovery | $ | (110,427) |  | $ | 62,105 |
Reconciliation of accounting profit multiplied by applicable tax rates | Income tax (expense) recovery differs from the amounts that would be obtained by applying the Canadian statutory income tax rate to net income (loss) before income taxes as follows:
For the years ended December 31 | 2021 | 2020
Income (loss) before income taxes | $ | 666,338 |  | $ | (187,432) |
Deduct earnings of associate | (97,743) |  | (29,577) |
| 568,595 |  | (217,009) |
Canadian statutory tax rate | 24.5 | % | 25.6 | %
Income tax recovery (expense) calculated at Canadian statutory tax rate | (139,306) |  | 55,554 |
Decrease (increase) in income tax expense resulting from: |  |
Impact of income and losses taxed in foreign jurisdictions | (24,313) |  | 3,771 |
Utilization of unrecognized loss carryforwards and temporary differences | 7,008 |  | 7,013 |
Impact of tax rate changes and tax settlements | 43,515 |  | (5,031) |
Impact of foreign exchange | (3,198) |  | 3,748 |
Other business taxes | (3,691) |  | (3,081) |
Impact of recovery items (expenses) not taxable (deductible) for tax purposes | 8,377 |  | (5,461) |
Adjustments to prior years | (373) |  | 1,496 |
Other | 1,554 |  | 4,096 |
Total income tax (expense) recovery | $ | (110,427) |  | $ | 62,105 |
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, 2021 |  |  | Dec 31, 2020
| Net | Deferred tax assets | Deferred tax liabilities |  | Net | Deferred tax assets | Deferred tax liabilities
Property, plant and equipment (owned) | $ | (427,001) |  | $ | (253,108) |  | $ | (173,893) |  |  | $ | (448,533) |  | $ | (262,020) |  | $ | (186,513) |
Right-of-use assets | (35,571) |  | (28,047) |  | (7,524) |  |  | (43,386) |  | (35,297) |  | (8,089) |
Repatriation taxes | (106,339) |  | — |  | (106,339) |  |  | (102,370) |  | — |  | (102,370) |
Other | (13,467) |  | (270) |  | (13,197) |  |  | (15,205) |  | — |  | (15,205) |
| (582,378) |  | (281,425) |  | (300,953) |  |  | (609,494) |  | (297,317) |  | (312,177) |
Non-capital loss carryforwards | 370,642 |  | 329,405 |  | 41,237 |  |  | 391,132 |  | 339,396 |  | 51,736 |
Lease obligations | 48,481 |  | 37,153 |  | 11,328 |  |  | 56,894 |  | 44,455 |  | 12,439 |
Share-based compensation | 14,063 |  | 1,832 |  | 12,231 |  |  | 14,669 |  | 1,758 |  | 12,911 |
Other | 34,656 |  | 11,204 |  | 23,452 |  |  | 70,931 |  | 49,232 |  | 21,699 |
| 467,842 |  | 379,594 |  | 88,248 |  |  | 533,626 |  | 434,841 |  | 98,785 |
Net deferred income tax assets (liabilities) | $ | (114,536) |  | $ | 98,169 |  | $ | (212,705) |  |  | $ | (75,868) |  | $ | 137,524 |  | $ | (213,392) |
As at December 31, 2021, 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 2021
| Gross amount | Tax effect
Expire |  |
Losses generated in 2015 (expires 2035) | $ | 294,774 |  | $ | 67,798 |
Losses generated in 2016 (expires 2036) | 432,581 |  | 99,494 |
Losses generated in 2017 (expires 2037) | 234,941 |  | 54,036 |
| 962,296 |  | 221,328 |
No expiry |  |
Losses generated in 2019 | 255,244 |  | 58,706 |
Losses generated in 2020 | 160,058 |  | 36,813 |
Total non-capital loss carryforwards | $ | 1,377,598 |  | $ | 316,847 |
Analysis of the change in deferred income tax assets and liabilities:
|  | 2021 |  |  |  | 2020 |
| Net | Deferred tax assets | Deferred tax liabilities |  | Net | Deferred tax assets | Deferred tax liabilities
Balance, January 1 | $ | (75,868) |  | $ | 137,524 |  | $ | (213,392) |  |  | $ | (161,206) |  | $ | 111,614 |  | $ | (272,820) |
Deferred income tax recovery included in net income | 5,340 |  | (592) |  | 5,932 |  |  | 87,301 |  | 28,243 |  | 59,058 |
Deferred income tax recovery (expense) included in other comprehensive income | (42,919) |  | (38,763) |  | (4,156) |  |  | (2,325) |  | (2,333) |  | 8 |
Other | (1,089) |  | — |  | (1,089) |  |  | 362 |  | — |  | 362 |
Balance, December 31 | $ | (114,536) |  | $ | 98,169 |  | $ | (212,705) |  |  | $ | (75,868) |  | $ | 137,524 |  | $ | (213,392) |

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