Stock-Based Compensation (Narrative) (Details)	6 Months Ended
Jun. 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	71,000
Shares forfeited	15,000
Grant date fair value \| $ / shares	$ 520.23
Granted, weighted-average exercise price \| $ / shares	$ 1,611.18
Shares exercised	85,000
Weighted-average Black-Scholes fair value per share at date of grant \| $ / shares	$ 520.23
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	34,000
Shares forfeited	6,000
Grant date fair value \| $ / shares	$ 1,639.50
Units vested	21,000
Weighted-average Black-Scholes fair value per share at date of grant \| $ / shares	$ 1,639.50
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%

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