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Capital Stock - Additional Information (Details)
$ in Millions
 1 Months Ended 4 Months Ended 12 Months Ended 13 Months Ended
Dec. 31, 2021
USD ($)
vote
shares
Dec. 31, 2021
USD ($)
vote
shares
Jan. 29, 2021
shares
Jan. 29, 2021
shares
Jun. 30, 2021
shares
Dec. 05, 2022
shares
Dec. 31, 2021
USD ($)
shares
vote
Nov. 23, 2021
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
shares
Dec. 31, 2019
shares
Jan. 01, 2021
Jan. 01, 2020
Jan. 01, 2019
Dec. 31, 2018
shares
Disclosure of classes of share capital [line items]                              
Expense reversal to reflect reduction in estimated PSUs expected to vest | $             $ 8.4                
Risk free interest rate, share options granted             1.09%                
Expected volatility, share options granted             43.00%                
Option life, share options granted             7 years                
Performance period             3 years                
Number of share options granted in share-based payment arrangement (in shares)             90,000.00   0 0          
DSUs                              
Disclosure of classes of share capital [line items]                              
Conversion rate, numerator (in shares)             1                
Options                              
Disclosure of classes of share capital [line items]                              
Expiration period             10 years                
Vesting period             4 years                
PSUs                              
Disclosure of classes of share capital [line items]                              
Vesting period             3 years                
Percentage of shares vested dependent on performance achievements (percent)             100.00%                
TSR and Monte Carlo simulation premium                       109.00% 112.00% 102.00%  
Award requisite service period             3 years                
RSUs                              
Disclosure of classes of share capital [line items]                              
Conversion rate, numerator (in shares)             1                
Vesting period             3 years                
Bottom of range | PSUs                              
Disclosure of classes of share capital [line items]                              
Percentage of shares vested dependent on performance achievements (percent)             0.00%                
Top of range | PSUs                              
Disclosure of classes of share capital [line items]                              
Percentage of shares vested dependent on performance achievements (percent)             200.00%                
SVS                              
Disclosure of classes of share capital [line items]                              
Subordinate voting shares, number of votes per share | vote 1 1         1                
Conversion rate, numerator (in shares)             1                
Number of shares issued (in shares) 106,100,000 106,100,000         106,100,000   110,500,000 110,200,000 110,200,000       117,700,000
Number of SVS repurchased for cancellation (in millions) (in shares)             4,370,000   6,200.0000 8,300,000          
Conversion rate, denominator (in shares)             1                
Number of shares of SVS holder of vested PSU or RSU unit is entitled to (in shares) 1 1         1                
Number of SVS repurchased for delivery under SBC plans (in millions) (in shares)             1,900,000   2,900,000 1,200,000          
SVS | LTIP                              
Disclosure of classes of share capital [line items]                              
Number of shares authorized (in shares)             29,000,000                
Shares remaining in reserve for issuance (in shares) 10,000,000 10,000,000         10,000,000                
SVS | ASPP                              
Disclosure of classes of share capital [line items]                              
Number of SVS repurchased for delivery under SBC plans (in millions) (in shares)             700,000   0 0          
SVS | 2020 NCIB                              
Disclosure of classes of share capital [line items]                              
Number of SVS repurchased for cancellation (in millions) (in shares)             4,370,000   6,200.0000            
SVS | 2017 NCIB                              
Disclosure of classes of share capital [line items]                              
Number of SVS repurchased for cancellation (in millions) (in shares)                   8,300,000          
SVS | ASPP                              
Disclosure of classes of share capital [line items]                              
Number of SVS repurchased for cancellation (in millions) (in shares)         1,700,000       0 0          
Accrual for repurchase of stock under automatic share purchase plan | $                 $ 15.0            
SVS | 2021 NCIB                              
Disclosure of classes of share capital [line items]                              
Stock repurchase program, number of shares remaining 8,300,000 8,300,000         8,300,000                
SVS | 2021 NICB ASPP                              
Disclosure of classes of share capital [line items]                              
Accrual for repurchase of stock under automatic share purchase plan | $ $ 7.5 $ 7.5         $ 7.5                
SVS | 2021 SBC ASPP                              
Disclosure of classes of share capital [line items]                              
Accrual for repurchase of stock under automatic share purchase plan | $ $ 33.8 $ 33.8         $ 33.8                
Number of SVS repurchased for delivery under SBC plans (in millions) (in shares)             700,000                
SVS | 2021 SBC ASPP | Top of range                              
Disclosure of classes of share capital [line items]                              
Stock repurchase program, number of shares remaining 3,000,000.0 3,000,000.0         3,000,000.0                
SVS | 2018 NCIB                              
Disclosure of classes of share capital [line items]                              
Number of shares authorized to be repurchased (in shares)                     9,500,000        
Number of SVS repurchased for cancellation (in millions) (in shares)                     8,300,000        
Multiple voting shares                              
Disclosure of classes of share capital [line items]                              
Subordinate voting shares, number of votes per share | vote 25 25         25                
Number of shares issued (in shares) 18,600,000 18,600,000         18,600,000   18,600,000 18,600,000 18,600,000       18,600,000
Number of SVS repurchased for cancellation (in millions) (in shares)             0   0 0          
Preferred shares                              
Disclosure of classes of share capital [line items]                              
Number of shares issued (in shares) 0 0         0                
Purchase of shares for cancellation | SVS | Top of range                              
Disclosure of classes of share capital [line items]                              
Number of shares authorized to be repurchased (in shares)   3,700,000                          
Purchase of shares for cancellation | SVS | Top of range | ASPP                              
Disclosure of classes of share capital [line items]                              
Number of shares authorized to be repurchased (in shares)       2,000,000.0                      
Purchase of shares for cancellation | SVS | 2020 NCIB                              
Disclosure of classes of share capital [line items]                              
Number of shares authorized to be repurchased (in shares)               9,000,000              
Purchase of shares for cancellation | SVS | ASPP                              
Disclosure of classes of share capital [line items]                              
Number of SVS repurchased for cancellation (in millions) (in shares)     0                        
Purchase of shares for cancellation | SVS | 2021 NCIB                              
Disclosure of classes of share capital [line items]                              
Number of shares authorized to be repurchased (in shares)           9,000,000                  
Purchase of shares for cancellation | SVS | 2021 NICB ASPP                              
Disclosure of classes of share capital [line items]                              
Number of SVS repurchased for cancellation (in millions) (in shares)   3,600.0000                          
Purchase of shares for cancellation | SVS | 2021 NICB ASPP | Top of range                              
Disclosure of classes of share capital [line items]                              
Number of shares authorized to be repurchased (in shares)   700,000                          
Retirement of the chairman of the board of directors | Other related parties | Mr. William A. Etherington | DSUs                              
Disclosure of classes of share capital [line items]                              
Number of shares owned by Mr. Etherington (in shares) 475,000 475,000         475,000                
Award requisite service period 90 days