Note 15. Commitments and Contingencies Commitments and Contingencies (Details) - USD ($) $ in Millions		12 Months Ended
	Jun. 09, 2015	Dec. 31, 2021	Mar. 31, 2021
Loss Contingencies [Line Items]
Loss Contingency, Receivable		$ 10.3
Former Gain Contingency, Recognized in Current Period		7.8
Property, Plant and Equipment, Additions		4.9
Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		37.4
Maximum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		55.4
Environmental and Workplace Matters [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual		1.3
Loss from Catastrophes
Loss Contingencies [Line Items]
Loss Contingency, Receivable			$ 1.2
Loss Contingency, Receivable, Proceeds		17.8
Damage from Fire, Explosion or Other Hazard
Loss Contingencies [Line Items]
Loss Contingency, Receivable, Proceeds		8.1
Collectibility of Receivables
Loss Contingencies [Line Items]
Loss Contingency, Receivable, Proceeds		1.2
Joshua Harman, False Claims Act [Member] | Highway Products Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Judgment Entered, Value	$ 682.4
State, County, and Municipal Actions [Member] | Highway Products Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual		0.0
Missouri Class Action | Highway Products Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		23.9
Loss Contingency, Estimate of Possible Loss, Net of Tax		18.3
Accrued Liabilities [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual		$ 37.8