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Share Capital - Range of Exercise Prices of Stock Options (Details)
shares in Thousands
 12 Months Ended
Dec. 31, 2022
shares
$ / shares
Dec. 31, 2021
shares
$ / shares
Dec. 31, 2020
shares
$ / shares
Disclosure of range of exercise prices of outstanding share options [line items]      
Stock options outstanding (in shares) | shares 31,150 38,327 48,656
Weighted  average  remaining  term (years) 2 years 11 months 1 day    
Weighted average exercise price, options outstanding (in CAD per share) $ 42.37 $ 35.88 $ 37.53
Stock options exercisable (in shares) | shares 5,522 7,841  
Weighted average exercise price, options exercisable (in CAD per share) $ 37.60 $ 39.19  
$20.76 - $29.99      
Disclosure of range of exercise prices of outstanding share options [line items]      
Stock options outstanding (in shares) | shares 7,821    
Weighted  average  remaining  term (years) 2 years 11 months 23 days    
Weighted average exercise price, options outstanding (in CAD per share) $ 27.14    
Stock options exercisable (in shares) | shares 982    
Weighted average exercise price, options exercisable (in CAD per share) $ 24.07    
$20.76 - $29.99 | Bottom of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices 20.76    
$20.76 - $29.99 | Top of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices $ 29.99    
$30.00 - $39.99      
Disclosure of range of exercise prices of outstanding share options [line items]      
Stock options outstanding (in shares) | shares 11,266    
Weighted  average  remaining  term (years) 1 year 10 months 2 days    
Weighted average exercise price, options outstanding (in CAD per share) $ 36.60    
Stock options exercisable (in shares) | shares 2,672    
Weighted average exercise price, options exercisable (in CAD per share) $ 36.83    
$30.00 - $39.99 | Bottom of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices 30.00    
$30.00 - $39.99 | Top of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices $ 39.99    
$40.00 - $49.99      
Disclosure of range of exercise prices of outstanding share options [line items]      
Stock options outstanding (in shares) | shares 4,503    
Weighted  average  remaining  term (years) 2 years 7 months 13 days    
Weighted average exercise price, options outstanding (in CAD per share) $ 41.50    
Stock options exercisable (in shares) | shares 1,682    
Weighted average exercise price, options exercisable (in CAD per share) $ 42.73    
$40.00 - $49.99 | Bottom of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices 40.00    
$40.00 - $49.99 | Top of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices $ 49.99    
$50.00 - $59.99      
Disclosure of range of exercise prices of outstanding share options [line items]      
Stock options outstanding (in shares) | shares 555    
Weighted  average  remaining  term (years) 4 years 10 months 9 days    
Weighted average exercise price, options outstanding (in CAD per share) $ 54.24    
Stock options exercisable (in shares) | shares 1    
Weighted average exercise price, options exercisable (in CAD per share) $ 54.24    
$50.00 - $59.99 | Bottom of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices 50.00    
$50.00 - $59.99 | Top of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices $ 59.99    
$60.00 - $69.99      
Disclosure of range of exercise prices of outstanding share options [line items]      
Stock options outstanding (in shares) | shares 4,718    
Weighted  average  remaining  term (years) 4 years 5 months 26 days    
Weighted average exercise price, options outstanding (in CAD per share) $ 64.84    
Stock options exercisable (in shares) | shares 1    
Weighted average exercise price, options exercisable (in CAD per share) $ 64.15    
$60.00 - $69.99 | Bottom of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices 60.00    
$60.00 - $69.99 | Top of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices $ 69.99    
$70.00 - $79.71      
Disclosure of range of exercise prices of outstanding share options [line items]      
Stock options outstanding (in shares) | shares 2,287    
Weighted  average  remaining  term (years) 4 years 10 months 17 days    
Weighted average exercise price, options outstanding (in CAD per share) $ 75.40    
Stock options exercisable (in shares) | shares 184    
Weighted average exercise price, options exercisable (in CAD per share) $ 73.83    
$70.00 - $79.71 | Bottom of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices 70.00    
$70.00 - $79.71 | Top of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices $ 79.71