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Share Capital - Additional Information (Details) $ / shares in Units, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 CAD ($) shares day $ / shares | Dec. 31, 2022 CAD ($) 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 | 129,036 | 1,085,676 |
Cost of common shares repurchased and cancelled | $ 10.0 | $ 65.3 |
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 | 277.8 | 0.0 |
Dividends declared included in trade and other payables | 22.3 | 20.0 |
Net share-based compensation expense | 60.1 | 26.0 |
Expense related to amortization of fair value of options granted | 75.6 | 30.2 |
Reclassification adjustments on cash flow hedges, net of tax | 15.5 | $ (4.2) |
Number of share options outstanding in share-based payment arrangement (in shares) | shares |  | 281,061 |
Outstanding fair value | $ 95.5 | $ 60.4 |
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 | 121,498 | 150,591 |
Number of units paid | shares | 127,173 | 148,327 |
Payments made for RSUs | $ 10.2 | $ 8.0 |
Outstanding fair value | $ 20.2 | $ 12.7 |
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 | 183,388 | 263,434 |
Number of units paid | shares | 284,209 | 318,058 |
Outstanding fair value | $ 51.5 | $ 32.8 |
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 | 177,897 | 253,938 |
Fair value of share units granted | $ 15.7 | $ 14.5 |
Number of units paid | shares | 284,209 | 318,058 |
Amount of units paid | $ 28.2 | $ 15.3 |
DSUs, excluding dividends |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Percentage of compensation | 70.00% |  |
Number of trading days | day | 10 |  |
Number of share units granted | shares | 26,146 | 28,871 |
Fair value of share units granted | $ 1.9 | $ 1.6 |
DSUs |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share units granted | shares | 26,146 | 28,871 |
Number of units paid | shares | 24,081 | 0 |
Fair value of outstanding and vested DSUs | $ 23.8 | $ 14.9 |
Performance Share Units (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% |  |
Performance Share Units (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% |  |
Officers and employees | RSUs |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share units granted | shares | 118,259 | 145,884 |
Fair value of share units granted | $ 9.5 | $ 8.0 |

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