Business and Summary of Significant Accounting Policies - Property and Equipment, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment impairment charges	$ 4.2	$ 1.8	$ 5.1
Buildings and leasehold improvements \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	25 years
Buildings and leasehold improvements \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	50 years
Machinery and dealership equipment \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years
Machinery and dealership equipment \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	20 years
Office equipment, furniture and fixtures \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Office equipment, furniture and fixtures \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	20 years
Company vehicles \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Company vehicles \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years