Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Tax Credit Carryforward [Line Items]
Tax provision related to changes in pension and post-retirement plan assets and benefit obligations	$ 0.5	$ 0.5	$ 2.8
Deferred tax assets valuation allowance	43.6	46.4
Amount of unrecognized tax benefits that would, if recognized, affect the effective tax rate	8.6	18.4	7.8
Unrecognized tax benefits including interest and penalties expense	9.4	19.3
Gross unrecognized tax benefit	0.0	13.9	0.0
Indemnification receivable	3.1	7.1
Unrecognized tax benefits, interest and penalty (income)	(1.0)	(0.1)	(0.4)
Unrecognized tax benefits, interest and penalties accrued	1.3	2.8
Reasonably possible change in unrecognized tax benefits	3.7
Gross unrecognized tax benefits	8.1	16.5	$ 7.6	$ 10.3
Tax Loss and Credit Carryforwards
Tax Credit Carryforward [Line Items]
Deferred tax assets valuation allowance	$ 43.6	$ 46.4