Summary of Significant Accounting Policies Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disposal Group, Including Discontinued Operations [Line Items]
Loss from discontinued operations, net of benefit for income taxes of $0.6 and $0.6	$ (1.8)	$ (1.9)
Sale of Highway Products
Disposal Group, Including Discontinued Operations [Line Items]
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	(2.4)	(2.5)
Loss from discontinued operations, net of benefit for income taxes of $0.6 and $0.6	$ (1.8)	$ (1.9)