Benefit Plans and Other Postretirement Benefits, Benefit obligation and plan assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Amounts recognized in the balance sheet as of December 31:
Accrued pension and postretirement benefit obligations	$ 129.8	$ 143.0
Accumulated other comprehensive loss, net	$ (716.3)	$ (533.6)
United States
Weighted average assumptions used to determine projected benefit obligations:
Rate of compensation increase (as a percent)	2.40%	2.40%
Foreign Plans
Weighted average assumptions used to determine projected benefit obligations:
Rate of compensation increase (as a percent)	1.91%	1.89%
Pension Benefits
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$ 561.8	$ 563.8
Service cost	3.7	3.8	$ 6.0
Interest cost	24.1	25.4	14.0
Plan amendments	0.2	0.0
Actuarial (gain) loss	(32.1)	14.5
Foreign exchange translation and other	(8.8)	(9.5)
Benefits paid	(53.5)	(36.2)
Projected benefit obligation at end of year	495.4	561.8	563.8
Change in plan assets:
Fair value of plan assets at the beginning of the year	481.6	470.6
Actual return on plan assets	15.7	44.8
Employer contributions	4.9	5.4	6.3
Foreign exchange translation and other	(4.2)	(3.0)
Benefits paid	(53.5)	(36.2)
Fair value of plan assets at end of year	444.5	481.6	470.6
Over (under) funded status at end of year	(50.9)	(80.2)
Amounts recognized in the balance sheet as of December 31:
Other long-term assets	34.8	21.9
Other accrued expenses	3.9	4.1
Accrued pension and postretirement benefit obligations	81.8	98.0
Accumulated other comprehensive loss, net	(106.4)	(122.9)
Accumulated benefit obligation
Accumulated benefit obligation	492.5	557.0
Pension Benefits | United States
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	388.5	388.2
Service cost	2.2	2.5	3.5
Interest cost	17.8	18.6	10.6
Plan amendments	0.2	0.0
Actuarial (gain) loss	(20.8)	8.8
Foreign exchange translation and other	0.0	0.0
Benefits paid	(46.5)	(29.6)
Projected benefit obligation at end of year	341.4	388.5	388.2
Change in plan assets:
Fair value of plan assets at the beginning of the year	395.6	387.0
Actual return on plan assets	8.9	37.1
Employer contributions	1.1	1.1
Foreign exchange translation and other	0.0	0.0
Benefits paid	(46.5)	(29.6)
Fair value of plan assets at end of year	359.1	395.6	387.0
Over (under) funded status at end of year	17.7	7.1
Amounts recognized in the balance sheet as of December 31:
Other long-term assets	31.2	21.2
Other accrued expenses	1.2	1.2
Accrued pension and postretirement benefit obligations	12.3	12.9
Accumulated other comprehensive loss, net	$ (96.8)	$ (104.0)
Weighted average assumptions used to determine projected benefit obligations:
Benefit obligation discount rate (as a percent)	5.53%	4.97%
Increase (decrease) in benefit obligation due to change in discount rate	$ (17.0)
Accumulated benefit obligation
Accumulated benefit obligation	341.3	$ 388.2
Pension Benefits | Foreign Plans
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	173.3	175.6
Service cost	1.5	1.3	2.5
Interest cost	6.3	6.8	3.4
Plan amendments	0.0	0.0
Actuarial (gain) loss	(11.3)	5.7
Foreign exchange translation and other	(8.8)	(9.5)
Benefits paid	(7.0)	(6.6)
Projected benefit obligation at end of year	154.0	173.3	175.6
Change in plan assets:
Fair value of plan assets at the beginning of the year	86.0	83.6
Actual return on plan assets	6.8	7.7
Employer contributions	3.8	4.3
Foreign exchange translation and other	(4.2)	(3.0)
Benefits paid	(7.0)	(6.6)
Fair value of plan assets at end of year	85.4	86.0	$ 83.6
Over (under) funded status at end of year	(68.6)	(87.3)
Amounts recognized in the balance sheet as of December 31:
Other long-term assets	3.6	0.7
Other accrued expenses	2.7	2.9
Accrued pension and postretirement benefit obligations	69.5	85.1
Accumulated other comprehensive loss, net	$ (9.6)	$ (18.9)
Weighted average assumptions used to determine projected benefit obligations:
Benefit obligation discount rate (as a percent)	4.13%	3.72%
Accumulated benefit obligation
Accumulated benefit obligation	$ 151.2	$ 168.8
Largest foreign pension plan | Pension Benefits | Foreign Plans
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	81.7
Projected benefit obligation at end of year	$ 72.2	$ 81.7
Accumulated benefit obligation
Funding status [Extensible Enumeration]	us-gaap:UnfundedPlanMember	us-gaap:UnfundedPlanMember