Stock-Based Compensation (Stock Appreciation Rights Outstanding and Exercisable) (Details) - Stock Appreciation Rights (SARs) [Member] - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 9 months
Stock Appreciation Rights Outstanding, Shares	189,600	203,700
Stock Appreciation Rights Exercisable, Shares	153,100
$34.06 to $46.78 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices per Share, upper range limit	$ 257.08
Stock Appreciation Rights Outstanding, Shares	19,900
Stock Appreciation Rights Outstanding, Weighted-Average Remaining Contractual Term (in years)	1 year
Stock Appreciation Rights Outstanding, Aggregate Intrinsic Value	$ 4.6
Stock Appreciation Rights Exercisable, Shares	19,900
Stock Appreciation Rights Exercisable, Weighted-Average Remaining Contractual Life (in years)	1 year
Stock Appreciation Rights Exercisable, Aggregate Intrinsic Value	$ 5.1
Range of Exercise Prices per Share, lower range limit	$ 214.63
$51.11 to $81.14 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices per Share, upper range limit	$ 328.65
Stock Appreciation Rights Outstanding, Shares	46,500
Stock Appreciation Rights Outstanding, Weighted-Average Remaining Contractual Term (in years)	2 years 6 months 14 days
Stock Appreciation Rights Outstanding, Aggregate Intrinsic Value	$ 8.4
Stock Appreciation Rights Exercisable, Shares	46,500
Stock Appreciation Rights Exercisable, Weighted-Average Remaining Contractual Life (in years)	2 years 6 months 14 days
Stock Appreciation Rights Exercisable, Aggregate Intrinsic Value	$ 14.2
Range of Exercise Prices per Share, lower range limit	$ 278.00
$92.64 to $126.31 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices per Share, upper range limit	$ 418.69
Stock Appreciation Rights Outstanding, Shares	90,300
Stock Appreciation Rights Outstanding, Weighted-Average Remaining Contractual Term (in years)	4 years 5 months 12 days
Stock Appreciation Rights Outstanding, Aggregate Intrinsic Value	$ 14.6
Stock Appreciation Rights Exercisable, Shares	76,800
Stock Appreciation Rights Exercisable, Weighted-Average Remaining Contractual Life (in years)	4 years 3 months 29 days
Stock Appreciation Rights Exercisable, Aggregate Intrinsic Value	$ 23.6
Range of Exercise Prices per Share, lower range limit	$ 259.56
Exercise Price Range 4
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices per Share, upper range limit	$ 576.28
Stock Appreciation Rights Outstanding, Shares	32,900
Stock Appreciation Rights Outstanding, Weighted-Average Remaining Contractual Term (in years)	6 years 1 month 6 days
Stock Appreciation Rights Outstanding, Aggregate Intrinsic Value	$ 0.0
Stock Appreciation Rights Exercisable, Shares	9,900
Stock Appreciation Rights Exercisable, Weighted-Average Remaining Contractual Life (in years)	6 years 1 month 6 days
Stock Appreciation Rights Exercisable, Aggregate Intrinsic Value	$ 5.7