Employee Benefits - Components of Net Periodic Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Domestic Pension Plan
Defined Pension and Postretirement Benefit Plans
Service cost	$ 0.0	$ 0.0	$ 0.0	$ 0.0
Interest cost	0.9	1.0	2.6	2.8
Expected return on plan assets	(0.7)	(0.7)	(2.0)	(2.1)
Settlements	8.7	(0.0)	8.7	(0.0)
Amortization of:
Prior service cost	0.0	0.0	0.0	0.0
Unrecognized actuarial losses	0.5	0.3	1.5	1.1
Net periodic cost	9.4	0.6	10.8	1.8
Foreign Pension Plans
Defined Pension and Postretirement Benefit Plans
Service cost	0.8	0.8	2.5	2.5
Interest cost	4.2	3.8	12.2	11.1
Expected return on plan assets	(4.4)	(3.8)	(12.9)	(11.1)
Settlements	(0.2)	(0.1)	(0.2)	(0.2)
Amortization of:
Prior service cost	0.0	0.1	0.0	0.1
Unrecognized actuarial losses	1.7	1.5	5.1	4.4
Net periodic cost	2.1	2.3	6.7	6.8
Domestic Postretirement Benefit Plan
Defined Pension and Postretirement Benefit Plans
Service cost	0.0	0.0	0.0	0.0
Interest cost	0.2	0.2	0.6	0.6
Expected return on plan assets	(0.0)	(0.0)	(0.0)	(0.0)
Settlements	(0.0)	(0.0)	(0.0)	(0.0)
Amortization of:
Prior service cost	0.0	0.0	0.0	0.0
Unrecognized actuarial losses	0.1	(0.0)	0.2	(0.0)
Net periodic cost	$ 0.3	$ 0.2	$ 0.8	$ 0.6