Segment Information - Summary of Reportable Operating Segment (Details) - USD ($) |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2022 |
Jun. 30, 2021 |
Jun. 30, 2022 |
Jun. 30, 2021 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Revenues: | ||||||
| Total consolidated revenues | $ 3,652,800,000 | $ 3,352,200,000 | $ 7,239,400,000 | $ 6,139,000,000 | ||
| Segment income (loss): | ||||||
| Segment income (loss) | 154,800,000 | 165,400,000 | 309,200,000 | 253,300,000 | ||
| Interest expense, other, net | (21,300,000) | (10,100,000) | (42,100,000) | (20,400,000) | ||
| Other income (expense), net | (200,000) | 0 | 100,000 | 100,000 | ||
| Income (loss) from continuing operations before taxes | 127,200,000 | 151,000,000.0 | 256,100,000 | 223,600,000 | ||
| Impairment of Long-Lived Assets to be Disposed of | 0 | |||||
| Depreciation, Depletion and Amortization | 31,200,000 | 24,800,000 | 61,100,000 | 48,400,000 | ||
| FloorPlanInterestExpense | 6,100,000 | 4,300,000 | 11,100,000 | 9,400,000 | ||
| Interest Expense, Other | 21,300,000 | 10,100,000 | 42,100,000 | 20,400,000 | ||
| Payments to Acquire Property, Plant, and Equipment | 41,600,000 | 37,400,000 | 100,400,000 | 105,100,000 | ||
| Cash and cash equivalents | 327,100,000 | 239,600,000 | 327,100,000 | 239,600,000 | $ 299,400,000 | $ 170,300,000 |
| Other Assets | 0 | 200,000 | 0 | 200,000 | ||
| Assets | 5,023,500,000 | 5,023,500,000 | 4,975,100,000 | |||
| Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 2,987,200,000 | 2,756,600,000 | 5,948,500,000 | 5,036,300,000 | ||
| Segment income (loss): | ||||||
| Interest expense, other, net | (20,200,000) | (9,700,000) | (40,300,000) | (19,700,000) | ||
| Depreciation, Depletion and Amortization | 25,300,000 | 20,600,000 | 50,100,000 | 41,000,000.0 | ||
| FloorPlanInterestExpense | 3,900,000 | 3,200,000 | 7,200,000 | 7,300,000 | ||
| Interest Expense, Other | 20,200,000 | 9,700,000 | 40,300,000 | 19,700,000 | ||
| Payments to Acquire Property, Plant, and Equipment | 21,900,000 | 25,500,000 | 52,000,000.0 | 71,700,000 | ||
| Assets | 4,031,900,000 | 4,031,900,000 | 3,934,900,000 | |||
| EchoPark Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 665,600,000 | 595,600,000 | 1,290,900,000 | 1,102,700,000 | ||
| Segment income (loss): | ||||||
| Interest expense, other, net | (1,100,000) | (400,000) | (1,800,000) | (700,000) | ||
| Depreciation, Depletion and Amortization | 5,900,000 | 4,200,000 | 11,000,000.0 | 7,400,000 | ||
| FloorPlanInterestExpense | 2,200,000 | 1,100,000 | 3,900,000 | 2,100,000 | ||
| Interest Expense, Other | 1,100,000 | 400,000 | 1,800,000 | 700,000 | ||
| Payments to Acquire Property, Plant, and Equipment | 19,700,000 | 11,900,000 | 48,400,000 | 33,400,000 | ||
| Assets | 664,500,000 | 664,500,000 | $ 740,600,000 | |||
| Operating segments | Franchised Dealerships Segment | ||||||
| Segment income (loss): | ||||||
| Segment income (loss) | 162,100,000 | 165,400,000 | 326,000,000.0 | 236,000,000.0 | ||
| Operating segments | EchoPark Segment | ||||||
| Segment income (loss): | ||||||
| Segment income (loss) | (34,900,000) | (14,400,000) | (69,900,000) | (12,400,000) | ||
| Reconciling items | ||||||
| Segment income (loss): | ||||||
| Other income (expense), net | 127,200,000 | 151,000,000.0 | 256,100,000 | 223,600,000 | ||
| New vehicles | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 1,510,700,000 | 1,462,900,000 | 3,010,600,000 | 2,619,200,000 | ||
| New vehicles | Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 1,508,200,000 | 1,462,000,000 | 3,002,400,000 | 2,618,300,000 | ||
| Used vehicles | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 1,449,400,000 | 1,281,200,000 | 2,820,200,000 | 2,384,100,000 | ||
| Used vehicles | Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 871,900,000 | 761,500,000 | 1,725,700,000 | 1,423,100,000 | ||
| Used vehicles | EchoPark Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 577,500,000 | 519,700,000 | 1,094,500,000 | 961,000,000.0 | ||
| Wholesale vehicles | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 121,400,000 | 84,800,000 | 290,200,000 | 159,600,000 | ||
| Wholesale vehicles | Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 79,200,000 | 63,000,000.0 | 185,500,000 | 119,100,000 | ||
| Wholesale vehicles | EchoPark Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 42,200,000 | 21,800,000 | 104,700,000 | 40,500,000 | ||
| Parts, service and collision repair | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 398,100,000 | 346,100,000 | 778,700,000 | 654,200,000 | ||
| Parts, service and collision repair | Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 398,100,000 | 346,100,000 | 778,700,000 | 654,200,000 | ||
| Finance, insurance and other, net | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 173,200,000 | 177,200,000 | 339,700,000 | 321,900,000 | ||
| Finance, insurance and other, net | Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 129,800,000 | 124,000,000.0 | 256,200,000 | 221,600,000 | ||
| Finance, insurance and other, net | EchoPark Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 43,400,000 | 53,200,000 | 83,500,000 | 100,300,000 | ||
| NewVehiclesMember | EchoPark Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 2,500,000 | 900,000 | 8,200,000 | 900,000 | ||
| Retail New Vehicles [Member] | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 1,344,300,000 | 1,453,200,000 | 2,695,600,000 | 2,587,200,000 | ||
| Retail New Vehicles [Member] | Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 1,341,700,000 | 1,452,300,000 | 2,687,400,000 | 2,586,300,000 | ||
| Fleet New Vehicles [Member] | ||||||
| Revenues: | ||||||
| Total consolidated revenues | 166,400,000 | 9,700,000 | 315,000,000.0 | 32,000,000.0 | ||
| Fleet New Vehicles [Member] | Franchised Dealerships Segment | ||||||
| Revenues: | ||||||
| Total consolidated revenues | $ 166,500,000 | $ 9,700,000 | $ 315,000,000.0 | $ 32,000,000.0 | ||