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Share Capital - Additional Information (Details) $ / shares in Units, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 CAD ($) shares day | Dec. 31, 2023 CAD ($) shares $ / shares | Dec. 11, 2023 shares
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Common shares repurchased for cancellation (in shares) | shares | 0 | 129,036 |
Cost of common shares repurchased and cancelled |  | $ 10.0 |
Increase (decrease) in number of ordinary shares issued (in shares) | shares |  | 3,108,450 |
Treasury price per share (in cad per share) | $ / shares |  | $ 92.50 |
Gross proceeds from issuing shares |  | $ 287.5 |
Proceeds from issue of share capital, net of transaction costs | $ 0.0 | 277.8 |
Dividends declared included in trade and other payables | 23.9 | 22.3 |
Net share-based compensation expense | 43.0 | 75.6 |
Expense related to amortization of fair value of options granted | 49.6 | 60.1 |
Reclassification adjustments on cash flow hedges, net of tax | 6.6 | (15.5) |
Outstanding fair value | $ 85.2 | $ 95.5 |
Top of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Maximum common shares authorized to be repurchased (in shares) | shares |  |  | 2,281,339
RSUs |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Vesting period for share-based payment arrangement |  | 3 years |
Number of trading days | day | 5 |  |
Number of share units granted | shares | 118,812 | 121,498 |
Number of units paid | shares | 114,329 | 127,173 |
Payments made for RSUs | $ 13.8 | $ 10.2 |
Outstanding fair value | $ 22.2 | $ 20.2 |
PSUs |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Vesting period for share-based payment arrangement | 3 years |  |
Number of trading days | day | 5 |  |
Number of share units granted | shares | 130,644 | 183,388 |
Number of units paid | shares | 229,024 | 284,209 |
Outstanding fair value | $ 39.5 | $ 51.5 |
PSUs | Bottom of range | Option pricing model |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of units vest percentage | 0.00% |  |
PSUs | Top of range | Option pricing model |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of units vest percentage | 200.00% |  |
PSUs, excluding dividends |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share units granted | shares | 126,023 | 177,897 |
Fair value of share units granted | $ 13.9 | $ 15.7 |
Number of units paid | shares | 229,024 | 284,209 |
Amount of units paid | $ 41.6 | $ 28.2 |
PSUs, Return On Equity Weighting |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Weighting of the return on equity target | 60.00% |  |
PSUs, Total Shareholder Return Weighting |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Weighting of the return on equity target | 40.00% |  |
Performance Share Units (PSUs), Adjusted Earnings Per Share Growth And Total Shareholder Return Weighting |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Weighting of the return on equity target | 50.00% |  |
DSUs |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share units granted | shares | 13,070 | 26,146 |
Number of units paid | shares | 39,424 | 24,081 |
Fair value of outstanding and vested DSUs | $ 23.5 | $ 23.8 |
DSUs, excluding dividends |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of trading days | day | 10 |  |
Number of share units granted | shares | 11,446 | 23,077 |
Fair value of share units granted | $ 1.3 | $ 1.8 |
Percentage of compensation | 70.00% |  |
Officers and employees | RSUs |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share units granted | shares | 116,111 | 118,259 |
Fair value of share units granted | $ 13.3 | $ 9.5 |

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