Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Cumulative Effect of Adjustments for Adoption of ASC 606 (Details)

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Summary of Significant Accounting Policies - Cumulative Effect of Adjustments for Adoption of ASC 606 (Details) - USD ($)
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Revenues:      
Revenues $ 3,586,600,000 $ 2,786,800,000  
Cost of Sales:      
Cost of Sales (3,015,300,000) (2,385,900,000)  
Operating income (loss) 154,400,000 87,900,000  
Assets:      
Receivables, net 351,500,000   $ 401,100,000
Liabilities:      
Other accrued liabilities 406,300,000   350,500,000
Stockholders' Equity:      
Retained Earnings (Accumulated Deficit) 1,138,900,000   1,051,700,000
Parts, service and collision repair      
Revenues:      
Revenues 380,500,000 320,900,000  
Cost of Sales:      
Cost of Sales (193,900,000) (165,900,000)  
Finance, insurance and other, net      
Revenues:      
Revenues 166,600,000 $ 144,700,000  
ASU 2014-09 | Finance, insurance and other, net      
Assets:      
Contract assets $ 24,400,000   $ 34,900,000