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Retirement Plans - Amounts Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Current year net actuarial loss (gain)	$ (2.3)	$ (0.4)	$ (4.8)
Current year prior service cost (credit)	0.0	0.3	0.4
Amortization of net actuarial (loss) gain and prior service (cost) credit	(0.1)	(0.1)	(0.1)
Settlement and curtailment (charges) income, net	(0.2)	0.0	(0.2)
Total recognized in other comprehensive (income) loss, before taxes	(2.6)	(0.2)	(4.7)
Total recognized in other comprehensive (income) loss, after taxes	(2.0)	(0.1)	(3.6)
Pensions
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Current year net actuarial loss (gain)	(2.3)	(0.4)	(4.7)
Current year prior service cost (credit)	0.0	0.3	0.5
Amortization of net actuarial (loss) gain and prior service (cost) credit	(0.1)	(0.1)	(0.1)
Settlement and curtailment (charges) income, net	(0.2)	0.0	(0.2)
Total recognized in other comprehensive (income) loss, before taxes	(2.6)	(0.2)	(4.5)
Total recognized in other comprehensive (income) loss, after taxes	(2.0)	(0.1)	(3.4)
Other Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Current year net actuarial loss (gain)	0.0	0.0	(0.1)
Current year prior service cost (credit)	0.0	0.0	(0.1)
Amortization of net actuarial (loss) gain and prior service (cost) credit	0.0	0.0	0.0
Settlement and curtailment (charges) income, net	0.0	0.0	0.0
Total recognized in other comprehensive (income) loss, before taxes	0.0	0.0	(0.2)
Total recognized in other comprehensive (income) loss, after taxes	$ 0.0	$ 0.0	$ (0.2)

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Amount, before tax, of cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan, attributable to parent.

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