Sonic Automotive, Inc. Annual report [Section 13 and 15(d), not S-K Item 405]

Annual report [Section 13 and 15(d), not S-K Item 405]

Segment Information - Summary of Reportable Operating Segment (Details)

Segment Information - Summary of Reportable Operating Segment (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2025 USD ($) Segment	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting Information [Line Items]
Operating income (loss)		$ 367,500,000	$ 461,500,000	$ 423,600,000
Interest expense, other, net		(110,100,000)	(118,000,000.0)	(114,600,000)
Other income (expense), net		100,000	(500,000)	100,000
Income before taxes		172,800,000	256,100,000	241,900,000
Segment Schedule Footnotes
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		(5,500,000)
Asset impairment charges		173,800,000	3,900,000	79,300,000
Legal costs		(700,000)
Storm-related physical damage and legal costs		(5,000,000.0)	(8,300,000)	(1,900,000)
Total floor plan interest expense		84,700,000	86,900,000	67,200,000
Depreciation, Depletion and Amortization, Nonproduction		163,400,000	150,400,000	142,300,000
Total assets	$ 5,895,700,000	5,970,700,000	5,895,700,000
Cash and cash equivalents	44,000,000.0	6,300,000	44,000,000.0	28,900,000	$ 229,200,000
Goodwill	358,500,000	421,800,000	358,500,000	253,800,000
Intangible Assets, Net (Excluding Goodwill)	430,300,000	$ 454,100,000	430,300,000
Number of operating segments \| Segment		3
Segment Income		$ 346,500,000	260,000,000.0	321,200,000
EchoPark Segment Income		28,100,000	3,500,000	(132,500,000)
Powersports Segment Segment Income		2,300,000	(1,100,000)	5,700,000
Segment Retail Units Sold
Franchised Dealerships Used Vehicle Revenue		3,087,000,000	2,919,800,000	3,050,300,000
Franchised Dealerships Wholesale Revenue		207,000,000.0	188,900,000	204,500,000
Franchised Dealerships Fixed Ops Revenue		1,970,200,000	1,802,900,000	1,714,200,000
Franchised Dealerships F&I Revenue		571,500,000	506,800,000	498,600,000
Franchised New Vehicles Cost of Sales		(6,574,300,000)	(6,048,600,000)	(5,696,300,000)
Franchised Fleet New Vehicle Cost of Sales		(99,800,000)	(92,300,000)	(88,200,000)
Franchised Used Vehicles Cost of Sales		(2,929,200,000)	(2,769,600,000)	(2,887,400,000)
EchoPark New Vehicle Revenue		0	0	1,000,000.0
EchoPark Used Vehicle Revenue		1,747,800,000	1,838,000,000	2,143,800,000
EchoPark Wholesale Revenue		104,600,000	95,800,000	111,700,000
EchoPark F&I Revenue		219,200,000	194,000,000.0	177,900,000
Powersports Used Vehicle Revenue		37,900,000	22,300,000	19,500,000
Powersports Wholesale Vehicle Revenue		2,400,000	2,300,000	2,600,000
Powersports Fixed Ops Revenue		48,900,000	43,600,000	45,300,000
Powersports F&I Revenue		8,200,000	7,100,000	7,200,000
Powersports Retail New Vehicles Cost of Sales		(89,800,000)	(70,500,000)	(72,000,000.0)
Powersports Used vehicles Cost of Sales		(31,100,000)	(17,000,000.0)	(14,100,000)
Powersports Wholesale vehicles Cost of Sales		(2,500,000)	(2,600,000)	(2,800,000)
Powersports Parts, service and collision repair Cost of Sales		(25,700,000)	(23,500,000)	(24,000,000.0)
Powersports Segment gross profit		53,800,000	43,700,000	50,300,000
Powersports SG&A Expense - Compensation		(29,900,000)	(25,700,000)	(27,700,000)
Powersports SG&A Expense - Advertising		(1,100,000)	(1,700,000)	(1,800,000)
Powersports SG&A Expense - Rent		900,000	900,000	500,000
Total revenues		15,153,600,000	14,224,300,000	14,372,400,000
EchoPark Segment Assets	574,500,000	506,100,000	574,500,000
PowerSport Segment Assets [Domain]	232,700,000	224,400,000	232,700,000
Powersport Interest Expense, Other, Net		(2,800,000)	(2,600,000)	(1,700,000)
Powersports Floorplan Exp		(1,600,000)	(2,100,000)	(600,000)
Powersports Depreciation and Amortization		(5,300,000)	(4,200,000)	(3,400,000)
Powersports Capital Expenditures		2,900,000	3,900,000	6,900,000
EchoPark New Vehicle Cost of Sales				(900,000)
EchoPark Used Vehicle Cost of Sales		(1,731,300,000)	(1,822,800,000)	(2,160,900,000)
EchoPark Wholesale Cost of Sales		(106,400,000)	(97,100,000)	(110,800,000)
EchoPark Segment Gross Profit		233,900,000	207,900,000	161,800,000
EchoPark SG&A Expense - Compensation		(100,600,000)	(95,800,000)	(132,000,000.0)
EchoPark SG&A Expense - Advertising		(30,200,000)	(27,700,000)	(49,900,000)
EchoPark SG&A Expense - Rent		(3,000,000.0)	1,700,000	(6,300,000)
EchoPark SG&A Expense - Other		(39,000,000.0)	(43,900,000)	(58,800,000)
Franchised Wholesale Vehicles Cost of Sales		(216,300,000)	(193,500,000)	(207,800,000)
Franchised Parts, service and collision repair Cost of Sales		(964,300,000)	(894,000,000.0)	(861,500,000)
Franchised Segment Gross Profit		2,095,200,000	1,941,200,000	2,033,600,000
Franchised SG&A expense - Compensation		(956,900,000)	(892,400,000)	(856,600,000)
Franchised SG&A Expense - Advertising		(69,900,000)	(55,100,000)	(40,500,000)
Franchised SG&A Expense - Rent		(44,300,000)	(39,200,000)	(40,300,000)
Franchised SG&A Expense - Other		(392,500,000)	(388,700,000)	(377,200,000)
Franchised Dealerships Depreciation and Amortization		(137,700,000)	(124,400,000)	(112,300,000)
Franchised Dealerships Floorplan Exp		(72,000,000.0)	(70,600,000)	(49,200,000)
Franchised Segment Interest Expense, Other, Net		(105,900,000)	(112,700,000)	(109,700,000)
Franchised Other income (expense), net		100,000	(500,000)	200,000
Franchised Dealerships Segment Income		316,100,000	257,600,000	448,000,000.0
Powersports SG&A Expense - Other		(11,700,000)	(9,400,000)	(9,900,000)
Gain Loss On Exit Of Leased Dealerships			3,000,000.0	(4,300,000)
Floor Plan Deposit Balance	340,000,000.0	300,000,000.0	340,000,000.0
Echo Park [Member]
Segment Schedule Footnotes
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		0.0
Asset impairment charges	$ 16,700,000
Fleet new vehicles
Segment Retail Units Sold
Total revenues		101,500,000	95,300,000	92,200,000
Total new vehicles
Segment Retail Units Sold
Total revenues		7,148,900,000	6,602,800,000	6,396,800,000
Retail new vehicles
Segment Retail Units Sold
Powersports New Vehicle Revenue		105,500,000	82,000,000.0	88,600,000
Total revenues		7,047,400,000	6,507,500,000	6,304,600,000
Echo Park [Member]
Segment Schedule Footnotes
Asset impairment charges		(200,000)	2,700,000
Nonrecurring Compensation Expense			(2,900,000)	(5,100,000)
Segment Retail Units Sold
Business Combination, Acquisition-Related Cost, Expense			2,100,000	(300,000)
Gain (Loss) on Disposition of Property Plant Equipment		900,000	(2,100,000)
Vehicle Inventory Valuation Adjustments				(10,000,000.0)
Echo Park [Member] \| CDK Outage Impact
Segment Schedule Footnotes
Nonrecurring Compensation Expense			(400,000)
Franchised Dealership Impairment [Member]
Segment Schedule Footnotes
Asset impairment charges				1,000,000.0
Franchised Dealership Impairment [Member] \| Property, Plant and Equipment
Segment Schedule Footnotes
Asset impairment charges		(165,900,000)
FranchisedDealershipMember [Member]
Segment Schedule Footnotes
Nonrecurring Compensation Expense			(2,200,000)
FranchisedDealershipMember [Member] \| Fleet new vehicles
Segment Retail Units Sold
Total revenues		101,500,000	95,300,000	92,200,000
FranchisedDealershipMember [Member] \| Retail new vehicles
Segment Retail Units Sold
Total revenues		6,941,900,000	6,425,500,000	6,215,000,000
FranchisedDealershipMember [Member] \| CDK Outage Impact
Segment Schedule Footnotes
Nonrecurring Compensation Expense			(13,000,000.0)
Franchised Dealerships [Member]
Segment Schedule Footnotes
Asset impairment charges			1,200,000
PreOwnedStoreMember [Member]
Segment Schedule Footnotes
Asset impairment charges				$ 78,300,000
Powersports Dealerships
Segment Schedule Footnotes
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		(1,100,000)
Asset impairment charges		(7,200,000)
Nonrecurring Compensation Expense			$ (500,000)
Powersports Dealerships \| Property, Plant and Equipment
Segment Schedule Footnotes
Asset impairment charges		$ (400,000)