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, 2023
Dec. 31, 2022
Dec. 31, 2021
Revenues:      
Total revenues $ 14,372,400,000 $ 14,001,100,000 $ 12,396,400,000
Cost of Sales:      
Total cost of sales (12,126,700,000) (11,684,100,000) (10,482,100,000)
Operating income (loss) 423,600,000 314,000,000.0 538,400,000
Assets:      
Receivables, net 528,100,000 462,400,000  
Liabilities:      
Other accrued liabilities 370,200,000 352,400,000  
Stockholders’ Equity:      
Retained Earnings (Accumulated Deficit) 1,238,600,000 1,100,300,000  
Parts, service and collision repair      
Revenues:      
Total revenues 1,759,500,000 1,599,700,000 1,340,400,000
Cost of Sales:      
Total cost of sales (885,500,000) (807,200,000) (667,500,000)
Finance, insurance and other, net      
Revenues:      
Total revenues 683,700,000 679,100,000 $ 637,200,000
ASU 2014-09 | Finance, insurance and other, net      
Assets:      
Contract with Customer, Asset, Net, Current $ 31,800,000 $ 38,700,000