XML 47 R37.htm IDEA: XBRL DOCUMENT v3.23.3
Stock-Based Compensation (Narrative) (Details)
 9 Months Ended
Sep. 30, 2023
$ / shares
shares
Performance Shares [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Grant date fair value | $ / shares $ 1,606.91
Units vested 49,000
Units forfeited 3,000
Performance shares granted 24,000
Weighted-average Black-Scholes fair value per share at date of grant | $ / shares $ 1,606.91
Performance and market measurement period 3 years
Performance Shares [Member] | Defined Minimum Targets Not Met [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Units vested 0
SOSARs [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Shares granted 72,000
Shares forfeited 18,000
Grant date fair value | $ / shares $ 521.66
Granted, weighted-average exercise price | $ / shares $ 1,615.39
Shares exercised 94,000
Weighted-average Black-Scholes fair value per share at date of grant | $ / shares $ 521.66
SOSARs [Member] | Vesting Period 1 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 2 years
SOSARs [Member] | Vesting Period 2 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 3 years
Restricted Stock Units (RSUs) [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Shares granted 35,000
Shares forfeited 8,000
Grant date fair value | $ / shares $ 1,647.04
Units vested 22,000
Weighted-average Black-Scholes fair value per share at date of grant | $ / shares $ 1,647.04
Restricted Stock Units (RSUs) [Member] | Vesting Period 1 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 2 years
Restricted Stock Units (RSUs) [Member] | Vesting Period 2 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 3 years
Minimum [Member] | Performance Shares [Member] | Vesting Period 1 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Targeted number of shares, quantity that will vest, percentage 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]  
Targeted number of shares, quantity that will vest, percentage 300.00%