Stock-Based Compensation - Allocation of Share-based Compensation Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation expense	$ 23.7	$ 37.5	$ 34.0
Stock option and appreciation rights
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation expense	5.6	12.5	10.2
Performance share units, stock-settled
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation expense	15.6	17.6	16.6
Performance share units, cash-settled
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation expense	(0.1)	1.0	0.4
Performance share units, dividend equivalents
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation expense	0.1	0.2	0.6
Employee stock purchase plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation expense	1.3	1.4	1.1
Deferred compensation plans and restricted share awards
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation expense	$ 1.2	$ 4.8	$ 5.1