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Stock-Based Compensation (Additional Information Regarding Options Outstanding And Exercisable) (Details)
shares in Thousands
12 Months Ended
Dec. 31, 2021
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding, Number of Shares | shares 1,899
Options Exercisable, Number of Shares | shares 1,166
$95.01 - $115.00 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise price range, lower limit $ 95.01
Exercise price range, upper limit $ 115.00
Options Outstanding, Number of Shares | shares 145
Options Outstanding, Weighted Average Remaining Contractual Life 1 year 2 months 12 days
Options Outstanding, Weighted Average Exercise Price $ 97.90
Options Exercisable, Number of Shares | shares 144
Options Exercisable, Weighted Average Exercise Price $ 97.90
$115.01 - $150.00 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise price range, lower limit 115.01
Exercise price range, upper limit $ 150.00
Options Outstanding, Number of Shares | shares 303
Options Outstanding, Weighted Average Remaining Contractual Life 2 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price $ 116.20
Options Exercisable, Number of Shares | shares 303
Options Exercisable, Weighted Average Exercise Price $ 116.20
$150.01 - $180.00 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise price range, lower limit 150.01
Exercise price range, upper limit $ 180.00
Options Outstanding, Number of Shares | shares 606
Options Outstanding, Weighted Average Remaining Contractual Life 3 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price $ 156.54
Options Exercisable, Number of Shares | shares 389
Options Exercisable, Weighted Average Exercise Price $ 156.55
$180.01 - $270.00 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise price range, lower limit 180.01
Exercise price range, upper limit $ 270.00
Options Outstanding, Number of Shares | shares 845
Options Outstanding, Weighted Average Remaining Contractual Life 4 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price $ 183.77
Options Exercisable, Number of Shares | shares 330
Options Exercisable, Weighted Average Exercise Price $ 183.44