Contingencies - Narrative (Details) - USD ($) $ in Millions		12 Months Ended	18 Months Ended	27 Months Ended
	Jun. 09, 2015	Dec. 31, 2021	Jun. 30, 2023	Jun. 30, 2023
Loss Contingencies [Line Items]
Loss Contingency, Receivable			$ 14.3	$ 14.3
Accrued Liabilities [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual			25.7	25.7
Highway Products Litigation | False Claims Act, USA
Loss Contingencies [Line Items]
Loss Contingency, Judgment Entered, Value	$ 682.4
Highway Products Litigation | State, County, and Municipal Actions [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual			0.0	0.0
Highway Products Litigation | Missouri Class Action
Loss Contingencies [Line Items]
Loss Contingency Accrual			7.8	7.8
Loss Contingency, Loss in Period		$ 23.9
Loss Contingency, Loss in Period, Net of Tax		$ 18.3
Loss Contingency Accrual, Payments			17.5
Environmental and Workplace Matters [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual			1.0	1.0
Loss from Catastrophes
Loss Contingencies [Line Items]
Loss Contingency, Receivable, Proceeds				28.9
Property, Plant and Equipment, Additions				19.6
Former Gain Contingency, Recognized in Current Period			1.2	1.2
Damage from Fire, Explosion or Other Hazard
Loss Contingencies [Line Items]
Loss Contingency, Receivable, Proceeds				8.1
Ohio Train Derailment Litigation | Ohio Train Derailment Litigation
Loss Contingencies [Line Items]
Loss Contingency Accrual			0.0	0.0
Minimum
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss			25.4	25.4
Maximum
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss			$ 36.9	$ 36.9