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Share Based Compensation - Exercise price ranges (Details)
shares in Thousands, Option in Thousands
12 Months Ended
Dec. 31, 2023
Option
shares
$ / shares
Dec. 31, 2022
Option
$ / shares
shares
Dec. 31, 2021
Option
$ / shares
Share Based Compensation      
Number of share options | Option 17,036 21,068 37,090
Weighted average remaining contractual life 3 years    
Weighted Average Exercise Price $ 39.32 $ 38.55 $ 38.39
Number of exercisable share option | Option 14,300 16,407  
Weighted Average Exercise Price Exercisable $ 39.61 $ 40.19  
Common shares authorized for issuance | shares 27,322 27,901  
22.00-23.27      
Share Based Compensation      
Number of share options | Option 1,980    
Weighted average remaining contractual life 3 years    
Weighted Average Exercise Price $ 22.65    
Number of exercisable share option | shares 1,422    
Weighted Average Exercise Price Exercisable $ 22.66    
22.00-23.27 | Minimum      
Share Based Compensation      
Exercise price (in dollars per share) 22.63    
22.00-23.27 | Maximum      
Share Based Compensation      
Exercise price (in dollars per share) $ 24.99    
23.28-24.99      
Share Based Compensation      
Number of share options | Option 4    
Weighted average remaining contractual life 4 years    
Weighted Average Exercise Price $ 28.86    
Number of exercisable share option | Option 1    
Weighted Average Exercise Price Exercisable $ 27.21    
23.28-24.99 | Minimum      
Share Based Compensation      
Exercise price (in dollars per share) 25.00    
23.28-24.99 | Maximum      
Share Based Compensation      
Exercise price (in dollars per share) $ 29.99    
30.00-34.99      
Share Based Compensation      
Number of share options | Option 19    
Weighted Average Exercise Price $ 31.26    
Number of exercisable share option | Option 16    
Weighted Average Exercise Price Exercisable $ 31.09    
30.00-34.99 | Minimum      
Share Based Compensation      
Exercise price (in dollars per share) 30.00    
30.00-34.99 | Maximum      
Share Based Compensation      
Exercise price (in dollars per share) $ 34.99    
35.00-39.99      
Share Based Compensation      
Number of share options | Option 5,414    
Weighted average remaining contractual life 3 years    
Weighted Average Exercise Price $ 38.35    
Number of exercisable share option | Option 4,429    
Weighted Average Exercise Price Exercisable $ 38.59    
35.00-39.99 | Minimum      
Share Based Compensation      
Exercise price (in dollars per share) 35.00    
35.00-39.99 | Maximum      
Share Based Compensation      
Exercise price (in dollars per share) $ 39.99    
40.00-44.99      
Share Based Compensation      
Number of share options | Option 8,239    
Weighted average remaining contractual life 1 year    
Weighted Average Exercise Price $ 42.83    
Number of exercisable share option | Option 8,117    
Weighted Average Exercise Price Exercisable $ 42.83    
40.00-44.99 | Minimum      
Share Based Compensation      
Exercise price (in dollars per share) 40.00    
40.00-44.99 | Maximum      
Share Based Compensation      
Exercise price (in dollars per share) $ 44.99    
45.00-49.99      
Share Based Compensation      
Number of share options | Option 1,291    
Weighted average remaining contractual life 5 years    
Weighted Average Exercise Price $ 45.76    
Number of exercisable share option | Option 231    
Weighted Average Exercise Price Exercisable $ 46.26    
45.00-49.99 | Minimum      
Share Based Compensation      
Exercise price (in dollars per share) 45.00    
45.00-49.99 | Maximum      
Share Based Compensation      
Exercise price (in dollars per share) $ 49.99    
50.00-54.27      
Share Based Compensation      
Number of share options | Option 89    
Weighted average remaining contractual life 2 years    
Weighted Average Exercise Price $ 52.79    
Number of exercisable share option | Option 84    
Weighted Average Exercise Price Exercisable $ 52.84    
50.00-54.27 | Minimum      
Share Based Compensation      
Exercise price (in dollars per share) 50.00    
50.00-54.27 | Maximum      
Share Based Compensation      
Exercise price (in dollars per share) $ 54.27