Pension - Components of Net Periodic Benefit Cost (Details) - Pension Benefits - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.3	$ 0.5
Interest cost	3.2	1.9
Expected return on plan assets	(4.3)	(3.9)
Amortization of net actuarial losses	1.3	2.0
Net periodic cost	$ 0.5	$ 0.5