Contingencies - Narrative (Details) - USD ($) $ in Millions		12 Months Ended
	Jun. 09, 2015	Mar. 31, 2022
Loss Contingencies [Line Items]
Loss Contingency, Receivable		$ 10.3
Property, Plant and Equipment, Additions		6.5
Former Gain Contingency, Recognized in Current Period		6.4
Accrued Liabilities [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual		42.0
Highway Products Litigation | False Claims Act, USA
Loss Contingencies [Line Items]
Loss Contingency, Judgment Entered, Value	$ 682.4
Highway Products Litigation | Massachusetts Qui Tam
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		5.0
Highway Products Litigation | State, County, and Municipal Actions [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual		0.0
Highway Products Litigation | Missouri Class Action
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		23.9
Loss Contingency, Estimate of Possible Loss, Net of Tax		18.3
Environmental and Workplace Matters [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual		1.3
Loss from Catastrophes
Loss Contingencies [Line Items]
Loss Contingency, Receivable		7.3
Loss Contingency, Receivable, Proceeds		17.8
Damage from Fire, Explosion or Other Hazard
Loss Contingencies [Line Items]
Loss Contingency, Receivable, Proceeds		8.1
Minimum
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		41.6
Maximum
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		$ 59.4