Stock-Based Compensation - Allocation of Share-based Compensation Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation expense	$ 18.7	$ 23.3	$ 23.7
Stock option and appreciation rights
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation expense	11.0	11.3	5.6
Performance share units
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation expense	2.2	5.9	15.6
Employee stock purchase plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation expense	1.3	1.3	1.3
Deferred compensation plans and restricted share awards
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation expense	$ 4.2	$ 4.8	$ 1.2