Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Details)

v3.20.2
Commitments and Contingencies - Additional Information (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Other Commitments [Line Items]    
Maximum exposure associated with general indemnifications $ 29.3 $ 46.5
General indemnifications minimum expiration period 1 year  
General indemnifications maximum expiration period 3 years  
Percentage of dealership that is accounted for under the equity method 50.00%  
Contingent liability reserve balance after reduction $ 4.3  
Other accrued liabilities    
Other Commitments [Line Items]    
Amount reserved for pending proceedings 0.3 1.2
Other long-term liabilities    
Other Commitments [Line Items]    
Amount reserved for pending proceedings $ 0.2 $ 0.3