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, 2024	Dec. 31, 2023
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 10 months 24 days
Stock Appreciation Rights Outstanding, Shares	203,700	292,500
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	33,400
Stock Appreciation Rights Outstanding, Weighted-Average Remaining Contractual Term (in years)	1 year 8 months 23 days
Stock Appreciation Rights Outstanding, Aggregate Intrinsic Value	$ 12.1
Stock Appreciation Rights Exercisable, Shares	33,400
Stock Appreciation Rights Exercisable, Weighted-Average Remaining Contractual Life (in years)	1 year 8 months 12 days
Stock Appreciation Rights Exercisable, Aggregate Intrinsic Value	$ 12.1
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	57,800
Stock Appreciation Rights Outstanding, Weighted-Average Remaining Contractual Term (in years)	3 years 6 months 29 days
Stock Appreciation Rights Outstanding, Aggregate Intrinsic Value	$ 17.4
Stock Appreciation Rights Exercisable, Shares	57,800
Stock Appreciation Rights Exercisable, Weighted-Average Remaining Contractual Life (in years)	3 years 6 months 29 days
Stock Appreciation Rights Exercisable, Aggregate Intrinsic Value	$ 17.4
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	112,500
Stock Appreciation Rights Outstanding, Weighted-Average Remaining Contractual Term (in years)	5 years 9 months 21 days
Stock Appreciation Rights Outstanding, Aggregate Intrinsic Value	$ 32.1
Stock Appreciation Rights Exercisable, Shares	61,900
Stock Appreciation Rights Exercisable, Weighted-Average Remaining Contractual Life (in years)	5 years 4 months 28 days
Stock Appreciation Rights Exercisable, Aggregate Intrinsic Value	$ 19.6
Range of Exercise Prices per Share, lower range limit	$ 259.56