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Shareholders' Capital (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 CAD ($) shares vote | Dec. 31, 2020 CAD ($) shares
Number of Common Shares |  |
Vesting of share awards (in shares) | shares | 3,013,000 | 2,922,000
Changes in equity [abstract] |  |
Beginning balance | $ | $ 578,213 | $ 2,947,209
Vesting of share awards | $ | 6,389 | 7,216
Ending balance | $ | $ 2,211,329 | $ 578,213
Shareholders’ capital |  |
Number of Common Shares |  |
Beginning balance (in shares) | shares | 561,227,000 | 558,305,000
Vesting of share awards (in shares) | shares | 2,986,000 | 2,922,000
Ending balance (in shares) | shares | 564,213,000 | 561,227,000
Changes in equity [abstract] |  |
Beginning balance | $ | $ 5,729,418 | $ 5,718,835
Vesting of share awards | $ | 7,175 | 10,583
Ending balance | $ | $ 5,736,593 | $ 5,729,418
Preference shares |  |
Preferred shares without nominal or par value (in shares) | shares | 10,000,000 |
Issued on corporate acquisition (in shares) | shares | 0 |
Ordinary shares |  |
Voting rights, votes per share | vote | 1 |

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