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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