Annual report pursuant to Section 13 and 15(d)

Segment Information - Summary of Reportable Operating Segment (Details)

v3.22.0.1
Segment Information - Summary of Reportable Operating Segment (Details)
 12 Months Ended
Dec. 31, 2021
USD ($)
Segment
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Segment Reporting Information [Line Items]        
Operating income (loss) $ 538,400,000 $ 33,900,000 $ 307,700,000  
Interest expense, other, net (48,000,000.0) (41,600,000) (53,000,000.0)  
Other income (expense), net (15,500,000) 100,000 (6,600,000)  
Income (loss) from continuing operations before taxes 458,200,000 (34,800,000) 199,600,000  
Segment Schedule Footnotes        
Asset impairment charges 100,000 270,000,000.0 20,800,000  
Executive transition costs     6,300,000  
Nonrecurring Compensation Expense 6,500,000      
Total floor plan interest expense 16,700,000 27,200,000 48,500,000  
Depreciation, Depletion and Amortization, Nonproduction 101,100,000 91,000,000.0 93,100,000  
Total assets 4,975,100,000 3,746,000,000    
Cash and cash equivalents 299,400,000 170,300,000 29,100,000 $ 5,900,000
Goodwill 416,400,000 214,000,000.0 475,800,000  
Intangible Assets, Net (Excluding Goodwill) 480,200,000 64,300,000    
Other corporate assets $ 200,000 0    
Number of operating segments | Segment 2      
Segment Income $ 458,300,000 235,200,000 220,400,000  
EchoPark Segment Income (72,000,000.0) 4,000,000.0 9,100,000  
Segment Retail Units Sold        
Franchised Dealerships New Vehicle Revenue 5,109,000,000 4,281,200,000 4,889,200,000  
Franchised Dealerships Used Vehicle Revenue 2,901,000,000 2,345,900,000 2,493,500,000  
Franchised Dealerships Wholesale Revenue 257,200,000 168,700,000 180,000,000.0  
Franchised Dealerships Fixed Ops Revenue 1,340,400,000 1,194,400,000 1,366,500,000  
Franchised Dealerships F&I Revenue 443,500,000 357,800,000 363,100,000  
Franchised Dealerships Segment Revenue 10,051,100,000 8,348,000,000 9,292,300,000  
EchoPark New Vehicle Revenue 9,000,000.0 0 0  
EchoPark Used Vehicle Revenue 2,032,600,000 1,258,200,000 1,025,300,000  
EchoPark Wholesale Revenue 110,000,000.0 28,700,000 22,900,000  
EchoPark F&I Revenue 193,700,000 132,100,000 113,800,000  
EchoPark Segment Revenue 2,345,300,000 1,419,000,000 1,162,000,000  
Total revenues 12,396,400,000 9,767,000,000 10,454,300,000  
EchoPark Total Impairment [Member]        
Segment Schedule Footnotes        
Asset impairment charges 100,000 0 19,700,000  
Franchised Dealership Impairment [Member]        
Segment Schedule Footnotes        
Asset impairment charges $ 0   1,100,000  
Franchised Dealerships [Member]        
Segment Schedule Footnotes        
Asset impairment charges   $ 270,000,000.0    
PreOwnedStoreMember [Member]        
Segment Schedule Footnotes        
Asset impairment charges     19,700,000  
Operating segments | Income (loss) from continuing operations before taxes | Franchised Dealership Impairment [Member]        
Segment Schedule Footnotes        
Asset impairment charges     $ 270,000,000