Annual report pursuant to Section 13 and 15(d)

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

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Description of Business and Summary of Significant Accounting Policies - Cumulative Effect of Adjustments for Adoption of ASC 606 (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Revenues:      
Total revenues $ 14,001,100,000 $ 12,396,400,000 $ 9,767,000,000
Cost of Sales:      
Total cost of sales (11,684,100,000) (10,482,100,000) (8,343,400,000)
Operating income (loss) 314,000,000.0 538,400,000 33,900,000
Assets:      
Receivables, net 462,400,000 401,100,000  
Liabilities:      
Other accrued liabilities 352,400,000 350,500,000  
Stockholders’ Equity:      
Retained Earnings (Accumulated Deficit) 1,100,300,000 1,051,700,000  
Parts, service and collision repair      
Revenues:      
Total revenues 1,599,700,000 1,340,400,000 1,194,300,000
Cost of Sales:      
Total cost of sales (807,200,000) (667,500,000) (599,000,000.0)
Finance, insurance and other, net      
Revenues:      
Total revenues 679,100,000 637,200,000 $ 489,900,000
ASU 2014-09 | Finance, insurance and other, net      
Assets:      
Contract with Customer, Asset, Net, Current $ 38,700,000 $ 34,900,000