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Acquisitions, Discontinued Operations, and the Asbestos Portfolio Sale - Results of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Asset acquired :
Loss from discontinued operations, net of tax	$ (1.3)	$ (54.8)	$ (19.6)
Discontinued operations
Asset acquired :
Loss from discontinued operations	(0.9)	(70.3)	(24.3)
Income tax benefit (provision)	(0.4)	15.5	4.7
Loss from discontinued operations, net of tax	(1.3)	(54.8)	(19.6)
Discontinued operations | Transformer Solutions
Asset acquired :
Loss from discontinued operations	0.0	0.0	(0.6)
Income tax benefit (provision)	0.0	0.0	0.9
Loss from discontinued operations, net of tax	0.0	0.0	0.3
Discontinued operations | DBT
Asset acquired :
Loss from discontinued operations	(0.6)	(69.0)	(17.3)
Income tax benefit (provision)	(0.1)	15.3	2.1
Loss from discontinued operations, net of tax	(0.7)	(53.7)	(15.2)
Discontinued operations | All other
Asset acquired :
Loss from discontinued operations	(0.3)	(1.3)	(6.4)
Income tax benefit (provision)	(0.3)	0.2	1.7
Loss from discontinued operations, net of tax	$ (0.6)	$ (1.1)	$ (4.7)

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