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Financial Instruments - Additional Information (Details)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2021
CAD ($)
day
Dec. 31, 2020
CAD ($)
day
Dec. 31, 2021
AUD ($)
day
Oct. 29, 2021
CAD ($)
Dec. 31, 2020
USD ($)
day
Disclosure of nature and extent of risks arising from financial instruments [line items]          
Gains (losses) on cash flow hedges, net of tax $ 3,600,000 $ (4,100,000)      
Maximum amount of credit risk exposure $ 1,746,900,000 $ 1,649,600,000      
Number of internal target days of revenue in trade receivables | day 59 58 59   58
Decrease through write-off, financial assets $ 1,000,000.0 $ 2,000,000.0      
Recoveries 2,200,000 0      
Adjustments in net income resulting from 1% changes in interest rate 1,500,000        
Adjustments in net income resulting from 0.5% changes in interest rate $ 2,600,000        
PSUs          
Disclosure of nature and extent of risks arising from financial instruments [line items]          
Adjustments in net income resulting from 10% changes in interest rate 130000000.00%   130000000.00%    
Revolving credit facility          
Disclosure of nature and extent of risks arising from financial instruments [line items]          
Amount of revolving credit facility     $ 800.0 $ 800,000,000.0  
Unused capacity of the facility $ 243,700,000 786,500,000      
Total return swap on share-based compensation units          
Disclosure of nature and extent of risks arising from financial instruments [line items]          
Unrealized gain (loss) on interest rate swap 100,000        
Gains (losses) on cash flow hedges, net of tax 100,000        
Reclassification adjustments on cash flow hedges, before tax 100,000        
Reclassification adjustments on cash flow hedges, net of tax 100,000        
Gains on change in fair value of derivatives 100,000        
Forward contract          
Disclosure of nature and extent of risks arising from financial instruments [line items]          
Gains on change in fair value of derivatives 300,000        
Derivative notional amount $ 39,300,000 96,000,000.0 $ 42.8   $ 75.0
Losses on change in fair value of derivatives   500,000      
Cash flow hedges          
Disclosure of nature and extent of risks arising from financial instruments [line items]          
Interest rate swap agreement, amount 160,000,000.0        
Interest rate swap agreement, fixed Interest rate 2.295%   2.295%    
Unrealized gain (loss) on interest rate swap $ 4,600,000 (5,400,000)      
Gains (losses) on cash flow hedges, net of tax $ 3,500,000 $ (4,100,000)      
Cash flow hedges | Total return swap on share-based compensation units          
Disclosure of nature and extent of risks arising from financial instruments [line items]          
Interest rate swap agreement, amount 24,900,000