Pension and Other Post-Retirement Benefits - Pension Obligations, Plan Assets, and Other Post-retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Change in Benefit Obligation
Service cost	$ 6.2	$ 5.4	$ 7.9
Change in Fair Value of Plan Assets
Plan assets at beginning of year	328.8
Plan assets at end of year	325.0	328.8
Amount Recognized
Other liabilities	(38.5)	(47.0)
Defined Benefit Pension [Member]
Change in Benefit Obligation
Benefit obligation at beginning of year	346.9	341.8
Service cost	6.1	5.3	7.7
Interest cost	16.4	16.6	10.1
Plan amendments	0.0	0.5
Actuarial loss	14.9	(12.4)
Benefits paid	24.3	30.8
Effect of foreign exchange rate changes	(0.5)	1.1
Benefit obligation at end of year	329.7	346.9	341.8
Change in Fair Value of Plan Assets
Plan assets at beginning of year	328.8	323.8
Actual return on plan assets	19.6	29.1
Effect of exchange rate changes	(0.4)	1.4
Company contributions	1.3	5.3
Benefits paid	(24.3)	(30.8)
Plan assets at end of year	325.0	328.8	323.8
Funded Status at end of year	(4.7)	(18.1)
Amount Recognized
Other liabilities	(4.7)	(18.1)
Accumulative other comprehensive loss:
Net actuarial loss	58.0	72.0
Prior service credit (cost)	0.5	0.6
Accumulated other comprehensive loss	58.5	72.6
Defined Benefit Plan, Amounts Recognized in Balance Sheet and Accumulated Other Comprehensive Income (Loss)	53.8	54.5
After-tax amount recognized in accumulated other comprehensive loss	46.2	56.8
Retiree Health and Life [Member]
Change in Benefit Obligation
Benefit obligation at beginning of year	14.9	15.6
Service cost	0.1	0.1	0.2
Interest cost	0.7	0.8	0.4
Actuarial loss	1.0	(0.2)
Benefits paid	1.6	1.8
Effect of foreign exchange rate changes	0.0	0.0
Benefit obligation at end of year	13.1	14.9	15.6
Change in Fair Value of Plan Assets
Plan assets at beginning of year	0.0	0.0
Actual return on plan assets	0.0	0.0
Effect of exchange rate changes	0.0	0.0
Company contributions	1.6	1.8
Benefits paid	(1.6)	(1.8)
Plan assets at end of year	0.0	0.0	$ 0.0
Funded Status at end of year	(13.1)	(14.9)
Amount Recognized
Other liabilities	(13.1)	(14.9)
Accumulative other comprehensive loss:
Net actuarial loss	(7.1)	(6.7)
Prior service credit (cost)	0.0	(0.2)
Accumulated other comprehensive loss	(7.1)	(6.9)
Defined Benefit Plan, Amounts Recognized in Balance Sheet and Accumulated Other Comprehensive Income (Loss)	(20.2)	(21.8)
After-tax amount recognized in accumulated other comprehensive loss	$ (5.6)	$ (5.4)