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Long-Term Debt - Additional Information (Details)
£ in Millions, $ in Millions, $ in Millions
 12 Months Ended
Oct. 29, 2021
CAD ($)
tranche
Dec. 31, 2024
CAD ($)
Dec. 31, 2023
CAD ($)
Dec. 31, 2024
GBP (£)
Dec. 31, 2024
AUD ($)
Jun. 27, 2024
CAD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2023
GBP (£)
Jun. 27, 2023
CAD ($)
Dec. 23, 2022
GBP (£)
Oct. 08, 2020
CAD ($)
Disclosure of detailed information about borrowings [line items]                      
Borrowings, interest rate   4.86% 6.78% 4.86% 4.86%   6.78% 6.78%      
Syndicated senior credit facilities, additional borrowing capacity $ 600,000,000                    
Number of tranches | tranche 2                    
Additional revolving credit facilities amount $ 600,000,000                    
Letter of credit outstanding   $ 4,200,000 $ 2,400,000                
Letter of credit issued and outstanding in addition   75,500,000 57,000,000.0                
Expire before 2022                      
Disclosure of detailed information about borrowings [line items]                      
Letter of credit issued and outstanding in addition   47,300,000 41,600,000                
Open-ended terms                      
Disclosure of detailed information about borrowings [line items]                      
Letter of credit issued and outstanding in addition   28,200,000 15,400,000                
Senior unsecured notes                      
Disclosure of detailed information about borrowings [line items]                      
Notional amount                 $ 250,000,000   $ 300,000,000
Borrowings, interest rate                 5.393%   2.048%
Syndicated senior credit facilities | Canadian Dollars                      
Disclosure of detailed information about borrowings [line items]                      
Bank indebtedness   0 0                
Revolving credit facility                      
Disclosure of detailed information about borrowings [line items]                      
Syndicated senior credit facilities, borrowing capacity 800,000,000                    
Revolving credit facilities amount   800,000,000                  
Amount available under the facility   539,800,000 718,100,000                
Revolving credit facility | Canadian Dollars                      
Disclosure of detailed information about borrowings [line items]                      
Payable amount   256,000,000.0                  
Revolving credit facility | US dollars                      
Disclosure of detailed information about borrowings [line items]                      
Payable amount     79,500,000       $ 60.0        
Term loan facilities                      
Disclosure of detailed information about borrowings [line items]                      
Syndicated senior credit facilities, borrowing capacity $ 310,000,000                    
Term Loan Tranche B                      
Disclosure of detailed information about borrowings [line items]                      
Syndicated senior credit facilities, borrowing capacity           $ 150,000,000          
Term Loan Tranche C                      
Disclosure of detailed information about borrowings [line items]                      
Syndicated senior credit facilities, borrowing capacity           160,000,000          
Unsecured bilateral                      
Disclosure of detailed information about borrowings [line items]                      
Revolving credit facilities amount           $ 100,000,000          
Unsecured multicurrency facility                      
Disclosure of detailed information about borrowings [line items]                      
Revolving credit facilities amount | £                   £ 20.0  
Payable amount   17,100,000 23,600,000 £ 9.5       £ 14.0      
Overdraft facility                      
Disclosure of detailed information about borrowings [line items]                      
Revolving credit facilities amount         $ 5            
Notes payable                      
Disclosure of detailed information about borrowings [line items]                      
Aggregate maturity value of notes   $ 116,600,000 $ 52,000,000.0                
Notes payable | Weighted average                      
Disclosure of detailed information about borrowings [line items]                      
Borrowings, interest rate   4.90% 5.00% 4.90% 4.90%   5.00% 5.00%      
Other financing obligations                      
Disclosure of detailed information about borrowings [line items]                      
Software additions acquired through software financing obligations   $ 66,300,000 $ 600,000                
Letter of credit                      
Disclosure of detailed information about borrowings [line items]                      
Revolving credit facilities amount   100,000,000                  
Surety facilities                      
Disclosure of detailed information about borrowings [line items]                      
Bonds issued under surety facilities   3,500,000 16,600,000                
Surety facilities expiring before September 2026                      
Disclosure of detailed information about borrowings [line items]                      
Bonds issued under surety facilities   $ 44,300,000 $ 20,300,000