Pension and Postretirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Domestic Plan
Components of the net periodic cost for retirement and postretirement benefits
Service cost	$ 5.4	$ 6.1	$ 16.1	$ 18.5
Interest cost	5.1	3.3	15.3	9.9
Expected return on plan assets	(6.0)	(6.3)	(18.0)	(19.0)
Amortization of unrecognized prior service cost and other costs	0.0	0.0	0.1	0.1
Amortization of unrecognized net loss	0.0	0.9	0.0	2.6
Net periodic cost recognized	4.5	4.0	13.5	12.1
Foreign Plan
Components of the net periodic cost for retirement and postretirement benefits
Service cost	1.2	1.3	3.5	4.3
Interest cost	2.9	1.3	8.9	4.6
Expected return on plan assets	(1.6)	(1.2)	(5.0)	(4.1)
Amortization of unrecognized prior service cost and other costs	(0.1)	(0.1)	0.1	0.2
Amortization of unrecognized net loss	0.4	0.5	1.0	1.9
Net periodic cost recognized	2.8	1.8	8.5	6.9
Postretirement Medical Benefits
Components of the net periodic cost for retirement and postretirement benefits
Service cost	0.0	0.0	0.0	0.0
Interest cost	0.2	0.1	0.6	0.3
Expected return on plan assets	0.0	0.0	0.0	0.0
Amortization of unrecognized prior service cost and other costs	0.0	0.0	0.1	0.1
Amortization of unrecognized net loss	0.0	0.1	0.0	0.2
Net periodic cost recognized	$ 0.2	$ 0.2	$ 0.7	$ 0.6