Stock-based Compensation (Stock Appreciation Rights) (Details) - USD ($) $ / shares in Units, $ 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]
Compensation expense	$ 30.1	$ 21.8	$ 24.3
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 4.1	$ 3.9	$ 4.8
Weighted-average fair value of grants, per share (in usd per share)	$ 0	$ 64.54	$ 70.50