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Stock-Based Compensation (Narrative) (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
item
$ / shares
shares
Dec. 31, 2020
USD ($)
employee
$ / shares
item
Dec. 31, 2019
USD ($)
$ / shares
shares
Dec. 30, 2020
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock authorized and reserved for issuances | shares 6,830      
Shares authorized but not issued | shares 2,141      
Weighted-average Black-Scholes fair value per share at date of grant | $ / shares $ 403.01 $ 231.52 $ 176.79  
Stock Options And SOSARs [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unearned compensation $ 23,115      
Weighted average period 1 year 6 months      
Total intrinsic value of options and SOSARs exercised $ 498,399 $ 236,573 $ 219,984  
Expiration period of SOSARs 7 years      
Restricted Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Grant date fair value | $ / shares   $ 905.96 $ 627.94  
Unearned compensation $ 21,600      
Weighted average period 1 year 6 months      
Shares vested, fair value $ 73,540 $ 47,649 $ 27,197  
Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Grant date fair value | $ / shares   $ 853.03 $ 583.13  
Unearned compensation $ 69,203      
Weighted average period 1 year 8 months 12 days      
Shares vested, fair value $ 97,496 $ 60,081 $ 0  
Vesting period 3 years      
Number of types of PSU awards | item   2    
Performance Shares [Member] | 2018 Stock Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of installments | item 4      
Number of employees affected by modified service requirements | employee   7    
Modified service requirements expense   $ 71,441    
Stock-based compensation expense $ 63,050      
Modified service requirements expense, unamortized $ 8,391      
Stock price | $ / shares       $ 1,374.17
Performance Shares [Member] | First Half Vested [Member] | 2018 Stock Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of installments | item 2      
Units vested | shares 33      
Performance Shares Grant 1 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance shares granted | shares     33  
Vesting period     3 years  
Performance Shares Grant 2 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance shares granted | shares     13  
Performance Shares Grant 2 [Member] | First Half Vested [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 3 years      
Vesting percentage     40.00%  
Performance Shares Grant 2 [Member] | Second Half Vested [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period     4 years  
Vesting percentage     60.00%  
Minimum [Member] | Performance Shares [Member] | Vesting Period 1 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of target number of shares to be earned if certain criteria is met 0.00%   0.00%  
Maximum [Member] | Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of target number of shares to be earned if certain criteria is met 100.00%      
Maximum [Member] | Performance Shares [Member] | Vesting Period 1 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of target number of shares to be earned if certain criteria is met 300.00%   300.00%