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Share-Based Compensation (Share-Based Payment Arrangement, Option, Activity) (Details) - $ / shares
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Number of Options      
Number of options outstanding, beginning balance (in shares) 3,039,951 2,961,167 2,339,667
Granted (in shares) 203,933 560,000 840,000
Special dividend adjustment (in shares) 104,348    
Exercised (in shares) (183,749) (471,216) (71,500)
Cancelled (in shares) 0 (10,000) (147,000)
Number of options outstanding, ending balance (in shares) 3,164,483 3,039,951 2,961,167
Number of options exercisable (in shares) 1,627,882    
Weighted Average Exercise Price per Share      
Number of options outstanding, beginning balance (in USD per share) $ 216.04 $ 210.59 $ 204.53
Granted (in USD per share) 331.46 234.29 226.58
Exercised (in USD per share) (191.74) (203.30) (175.16)
Cancelled (in USD per share) 0 (228.94) (222.67)
Number of options outstanding, ending balance (in USD per share) 217.75 $ 216.04 $ 210.59
Number of options exercisable (in USD per share) $ 201.00    
Service-Based      
Number of Options      
Number of options outstanding, beginning balance (in shares) 1,899,951 2,231,167 2,339,667
Granted (in shares) 65,000 140,000 70,000
Special dividend adjustment (in shares) 62,512    
Exercised (in shares) (173,422) (471,216) (71,500)
Cancelled (in shares) 0 0 (107,000)
Number of options outstanding, ending balance (in shares) 1,854,041 1,899,951 2,231,167
Number of options exercisable (in shares) 1,617,555    
Weighted Average Exercise Price per Share      
Number of options outstanding, beginning balance (in USD per share) $ 208.16 $ 204.60 $ 204.53
Granted (in USD per share) 398.97 248.54 200.61
Exercised (in USD per share) (189.95) (203.30) (175.16)
Cancelled (in USD per share) 0 0 (220.33)
Number of options outstanding, ending balance (in USD per share) 209.53 $ 208.16 $ 204.60
Number of options exercisable (in USD per share) $ 200.87    
Performance-Based      
Number of Options      
Number of options outstanding, beginning balance (in shares) 1,140,000 730,000 0
Granted (in shares) 138,933 420,000 770,000
Special dividend adjustment (in shares) 41,836    
Exercised (in shares) (10,327) 0 0
Cancelled (in shares) 0 (10,000) (40,000)
Number of options outstanding, ending balance (in shares) 1,310,442 1,140,000 730,000
Number of options exercisable (in shares) 10,327    
Weighted Average Exercise Price per Share      
Number of options outstanding, beginning balance (in USD per share) $ 229.16 $ 228.94 $ 0
Granted (in USD per share) 299.88 229.53 228.94
Exercised (in USD per share) (221.68) 0 0
Cancelled (in USD per share) 0 (228.94) (228.94)
Number of options outstanding, ending balance (in USD per share) 229.39 $ 229.16 $ 228.94
Number of options exercisable (in USD per share) $ 221.68