Benefit Plans - Pension Obligation and Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Pension Benefits [Member]
Change in benefit obligations:
Beginning projected benefit obligation	$ 342.3	$ 368.9
Service cost	3.8	4.2	$ 4.5
Interest cost	16.5	16.0	16.0
Actuarial (gain)/loss	4.5	(25.4)
Benefits paid	(23.0)	(18.7)
Foreign exchange impact	5.3	(3.1)
Other	(0.1)	0.4
Ending projected benefit obligation	349.3	342.3	368.9
Change in plan assets:
Beginning fair value	341.3	317.4
Actual return on plan assets	38.0	33.5
Employer contributions	8.5	11.6
Plan participants' contributions	0.4	0.4
Benefits paid	(23.4)	(18.7)
Foreign exchange impact	5.1	(2.9)
Ending fair value	369.9	341.3	317.4
Funded status	20.6	(1.0)
Postretirement Benefits [Member]
Change in benefit obligations:
Beginning projected benefit obligation	1.8	2.0
Service cost	0.0	0.0	0.0
Interest cost	0.1	0.1	0.1
Actuarial (gain)/loss	(0.1)	(0.1)
Benefits paid	(0.1)	(0.1)
Foreign exchange impact	0.1	(0.1)
Other	0.0	0.0
Ending projected benefit obligation	1.8	1.8	2.0
Change in plan assets:
Beginning fair value	0.0	0.0
Actual return on plan assets	0.0	0.0
Employer contributions	0.1	0.1
Plan participants' contributions	0.0	0.0
Benefits paid	(0.1)	(0.1)
Foreign exchange impact	0.0	0.0
Ending fair value	0.0	0.0	$ 0.0
Funded status	$ (1.8)	$ (1.8)