Stock-Based Compensation (Intrinsic Value and Tax Deductions of Stock Appreciation Rights) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Realized tax benefits from tax deductions	$ 5.2	$ 0.6	$ 5.7
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeiture Rate	13.60%
Instrinsic value of stock appreciation rights exercised	$ 19.8	3.5	31.2
Realized tax benefits from tax deductions	$ 4.8	$ 0.9	$ 7.7