Pension and Savings Plans - Components of Net Periodic Pension Cost (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Service cost for benefits earned	$ 0.1	$ 0.2	$ 0.3
Interest cost on projected benefit obligation	21.4	20.4	28.0
Expected return on plan assets	(23.8)	(22.9)	(29.7)
Settlement	0.0	0.0	(2.7)
Net actuarial (gain) loss	20.6	12.7	(25.6)
Net periodic pension cost (credit)	$ 18.3	$ 10.4	$ (29.7)