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Share-based compensation plans (Inputs used in the measurement - Cash) (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 CAD ($) shares yr $ / shares | Dec. 31, 2022 shares $ / shares | Dec. 31, 2021 shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of options granted | shares | 0 | 0 |
Average strike price | $ 0 | $ 0 |
Number of options, reporting date | shares | 1,396,289 | 3,053,571 | 3,458,001
Average strike price, reporting date | $ 14.73 | $ 15.75 |
Performance Share Unit Plan [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of options granted | shares | 232,160 |  |
Expected vesting | 83.00% |  |
Expected life of option | yr | 3 |  |
Expected forfeitures | 9.00% |  |
Weighted average measurement date fair values | $ 37.30 |  |
Number of options, reporting date | shares | 830,279 |  |
Expected vesting, reporting date | 70.00% |  |
Average strike price, reporting date | $ 0 |  |
Expected dividend, reporting date | $ | $ 0 |  |
Expected volatility, reporting date | 0.00% |  |
Risk free interest rate, reporting date | 0.00% |  |
Expected life of option, reporting date | yr | 0.8 |  |
Expected forfeitures, reporting date | 2.00% |  |
Weighted average measurement date fair values | $ 57.13 |  |
Restricted Share Unit Plan [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of options granted | shares | 162,930 |  |
Expected vesting | 0.00% |  |
Expected life of option | yr | 3 |  |
Expected forfeitures | 8.00% |  |
Weighted average measurement date fair values | $ 37.30 |  |
Number of options, reporting date | shares | 561,210 |  |
Expected vesting, reporting date | 0.00% |  |
Average strike price, reporting date | $ 0 |  |
Expected dividend, reporting date | $ | $ 0 |  |
Expected volatility, reporting date | 0.00% |  |
Risk free interest rate, reporting date | 0.00% |  |
Expected life of option, reporting date | yr | 1.0 |  |
Expected forfeitures, reporting date | 8.00% |  |
Weighted average measurement date fair values | $ 57.13 |  |
Phantom Stock Option Plan [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of options, reporting date | shares | 45,551 |  |
Expected vesting, reporting date | 0.00% |  |
Average strike price, reporting date | $ 12.29 | $ 12.55 |
Expected dividend, reporting date | $ | $ 0.12 |  |
Expected volatility, reporting date | 48.00% |  |
Risk free interest rate, reporting date | 3.50% |  |
Expected life of option, reporting date | yr | 3.4 |  |
Expected forfeitures, reporting date | 7.00% |  |
Weighted average measurement date fair values | $ 46.08 |  |
Phantom Restricted Share Unit Plan [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of options granted | shares | 9,997 |  |
Expected vesting | 0.00% |  |
Expected life of option | yr | 3 |  |
Expected forfeitures | 8.00% |  |
Weighted average measurement date fair values | $ 37.30 |  |
Number of options, reporting date | shares | 28,000 |  |
Expected vesting, reporting date | 0.00% |  |
Average strike price, reporting date | $ 0 |  |
Expected dividend, reporting date | $ | $ 0.12 |  |
Expected volatility, reporting date | 0.00% |  |
Risk free interest rate, reporting date | 0.00% |  |
Expected life of option, reporting date | yr | 1.0 |  |
Expected forfeitures, reporting date | 8.00% |  |
Weighted average measurement date fair values | $ 57.13 |  |

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