Segment Information - Summary of Reportable Operating Segment (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Sep. 30, 2022 |
Sep. 30, 2021 |
Sep. 30, 2022 |
Sep. 30, 2021 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Revenues: | ||||||
| Total consolidated revenues | $ 3,448,100,000 | $ 3,072,800,000 | $ 10,410,500,000 | $ 9,211,900,000 | ||
| Segment income (loss): | ||||||
| Segment income (loss) | 148,900,000 | 125,400,000 | 458,100,000 | 378,700,000 | ||
| Interest expense, other, net | (22,900,000) | (9,800,000) | (65,100,000) | (30,200,000) | ||
| Other income (expense), net | 0 | (100,000) | 100,000 | 100,000 | ||
| Income (loss) from continuing operations before taxes | 116,400,000 | 112,200,000 | 372,500,000 | 335,800,000 | ||
| Impairment of Long-Lived Assets to be Disposed of | 0 | |||||
| Depreciation, Depletion and Amortization | 32,800,000 | 25,200,000 | 94,000,000.0 | 73,700,000 | ||
| FloorPlanInterestExpense | 9,600,000 | 3,300,000 | 20,600,000 | 12,800,000 | ||
| Interest Expense, Other | 22,900,000 | 9,800,000 | 65,100,000 | 30,200,000 | ||
| Payments to Acquire Property, Plant, and Equipment | 97,300,000 | 76,500,000 | 197,600,000 | 181,500,000 | ||
| Cash and cash equivalents | 139,000,000.0 | 220,100,000 | 139,000,000.0 | 220,100,000 | $ 299,400,000 | $ 170,300,000 |
| Other Assets | 0 | 200,000 | 0 | 200,000 | ||
| Assets | 4,828,300,000 | 4,828,300,000 | 4,975,100,000 | |||
| Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 2,840,300,000 | 2,409,500,000 | 8,511,900,000 | 7,445,800,000 | ||
| Segment income (loss): | ||||||
| Interest expense, other, net | (21,400,000) | (9,500,000) | (61,700,000) | (29,200,000) | ||
| Depreciation, Depletion and Amortization | 25,800,000 | 21,200,000 | 75,800,000 | 62,300,000 | ||
| FloorPlanInterestExpense | 6,600,000 | 2,000,000.0 | 13,900,000 | 9,200,000 | ||
| Interest Expense, Other | 21,400,000 | 9,500,000 | 61,700,000 | 29,200,000 | ||
| Payments to Acquire Property, Plant, and Equipment | 43,800,000 | 53,800,000 | 95,800,000 | 122,000,000.0 | ||
| Assets | 4,004,900,000 | 4,004,900,000 | 3,934,900,000 | |||
| EchoPark Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 607,800,000 | 663,300,000 | 1,898,600,000 | 1,766,100,000 | ||
| Segment income (loss): | ||||||
| Interest expense, other, net | (1,500,000) | (300,000) | (3,400,000) | (1,000,000.0) | ||
| Depreciation, Depletion and Amortization | 7,000,000.0 | 4,000,000.0 | 18,200,000 | 11,400,000 | ||
| FloorPlanInterestExpense | 3,000,000.0 | 1,300,000 | 6,700,000 | 3,500,000 | ||
| Interest Expense, Other | 1,500,000 | 300,000 | 3,400,000 | 1,000,000.0 | ||
| Payments to Acquire Property, Plant, and Equipment | 53,500,000 | 22,700,000 | 101,800,000 | 59,500,000 | ||
| Assets | 684,400,000 | 684,400,000 | $ 740,600,000 | |||
| Operating segments | Franchised Dealerships Segment | ||||||
| Segment income (loss): | ||||||
| Segment income (loss) | 146,300,000 | 145,100,000 | 472,200,000 | 381,100,000 | ||
| Operating segments | EchoPark Segment | ||||||
| Segment income (loss): | ||||||
| Segment income (loss) | (29,900,000) | (32,900,000) | (99,700,000) | (45,300,000) | ||
| Reconciling items | ||||||
| Segment income (loss): | ||||||
| Other income (expense), net | 116,400,000 | 112,200,000 | 372,500,000 | 335,800,000 | ||
| New vehicles | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 1,405,100,000 | 1,146,900,000 | 4,138,700,000 | 3,766,100,000 | ||
| New vehicles | Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 1,391,600,000 | 1,143,400,000 | 4,117,100,000 | 3,761,700,000 | ||
| Used vehicles | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 1,358,000,000 | 1,324,800,000 | 4,178,300,000 | 3,708,900,000 | ||
| Used vehicles | Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 842,400,000 | 750,300,000 | 2,568,100,000 | 2,173,300,000 | ||
| Used vehicles | EchoPark Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 515,600,000 | 574,500,000 | 1,610,200,000 | 1,535,600,000 | ||
| Wholesale vehicles | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 114,700,000 | 97,100,000 | 404,800,000 | 256,700,000 | ||
| Wholesale vehicles | Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 75,800,000 | 64,100,000 | 261,200,000 | 183,200,000 | ||
| Wholesale vehicles | EchoPark Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 38,900,000 | 33,000,000.0 | 143,600,000 | 73,500,000 | ||
| Parts, service and collision repair | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 404,700,000 | 339,900,000 | 1,183,400,000 | 994,100,000 | ||
| Parts, service and collision repair | Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 404,700,000 | 339,900,000 | 1,183,400,000 | 994,100,000 | ||
| Finance, insurance and other, net | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 165,600,000 | 164,100,000 | 505,300,000 | 486,100,000 | ||
| Finance, insurance and other, net | Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 125,800,000 | 111,800,000 | 382,100,000 | 333,500,000 | ||
| Finance, insurance and other, net | EchoPark Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 39,800,000 | 52,300,000 | 123,200,000 | 152,600,000 | ||
| NewVehiclesMember | EchoPark Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 13,500,000 | 3,500,000 | 21,600,000 | 4,400,000 | ||
| Retail New Vehicles [Member] | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 1,373,100,000 | 1,128,000,000 | 4,068,700,000 | 3,715,200,000 | ||
| Retail New Vehicles [Member] | Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 1,359,600,000 | 1,124,500,000 | 4,047,100,000 | 3,710,800,000 | ||
| Fleet New Vehicles [Member] | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 32,000,000.0 | 18,900,000 | 70,000,000.0 | 50,900,000 | ||
| Fleet New Vehicles [Member] | Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | $ 32,000,000.0 | $ 18,900,000 | $ 70,000,000.0 | $ 50,900,000 | ||