Sonic Automotive, Inc. Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Tables) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accounting Policies [Abstract]
Revenues	$ 3,456,200,000	$ 2,786,800,000
Fleet As Reported	148,600,000
Total New Vehicles As Reported	1,499,900,000
Total Vehicles As Reported	3,039,500,000
Total Revenues As Reported	3,586,600,000
Fleet COS As Reported	(147,800,000)
Total New Vehicles COS As Reported	(1,331,400,000)
Total Vehicles COS As Reported	(2,821,400,000)
Total COS As Reported	(3,015,300,000)
Fleet Revenue Correction	(130,400,000)
Fleet COS Correction	130,400,000
Fleet As Restated	18,200,000
Total New Vehicles As Restated	1,369,500,000
Total Vehicles As Restated	2,909,100,000
Total Revenues As Restated	3,456,200,000
Fleet COS As Restated	(17,400,000)
Total New Vehicles As Restated	(1,201,000,000)
Total Vehicles COS As Restated	(2,691,000,000)
Total COS As Restated	$ (2,884,900,000)