SEGMENTS - Schedule of Certain Financial Information on a Segment Basis (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Segment Reporting [Line Items] | ||||
| Total revenue | $ 9,791.3 | $ 9,583.0 | $ 19,062.7 | $ 18,761.2 |
| Total gross profit | 1,497.4 | 1,485.1 | 2,919.1 | 2,895.4 |
| Floor plan interest expense | (69.7) | (55.0) | (125.6) | (112.0) |
| Vehicle operations income | 448.3 | 425.3 | 784.1 | 831.6 |
| Income before income taxes | 352.1 | 352.1 | 494.1 | 636.7 |
| Depreciation and amortization | (174.7) | (158.1) | ||
| Other interest expense | (62.7) | (66.7) | (132.9) | (132.2) |
| Other (expense) income, net | 36.2 | 48.5 | (31.5) | 49.3 |
| Operating segments | ||||
| Segment Reporting [Line Items] | ||||
| Income before income taxes | 332.6 | 373.3 | 586.5 | 694.4 |
| Operating segments | Vehicle Operations | ||||
| Segment Reporting [Line Items] | ||||
| Total revenue | 9,791.3 | 9,583.0 | 19,062.7 | 18,761.2 |
| Total gross profit | 1,497.4 | 1,485.1 | 2,919.1 | 2,895.4 |
| Floor plan interest expense | (69.7) | (55.0) | (125.6) | (112.0) |
| Personnel expense | (560.1) | (546.6) | (1,101.2) | (1,060.7) |
| Rent and facility expense | (201.1) | (181.2) | (403.3) | (363.6) |
| Advertising expense | (78.5) | (72.4) | (158.3) | (142.3) |
| Other vehicle operations expenses | (291.9) | (276.7) | (601.9) | (555.0) |
| Vehicle operations income | 296.1 | 353.2 | 528.8 | 661.9 |
| Operating segments | Financing Operations | ||||
| Segment Reporting [Line Items] | ||||
| Interest and fee income | 116.4 | 98.8 | 226.9 | 193.2 |
| Interest expense | (53.5) | (49.8) | (105.2) | (97.9) |
| Total interest margin | 62.9 | 49.0 | 121.7 | 95.3 |
| Lease income | 26.4 | 23.7 | 50.3 | 44.2 |
| Lease costs | (22.5) | (18.6) | (42.7) | (35.4) |
| Lease income, net | 3.9 | 5.1 | 7.6 | 8.8 |
| Provision expense | (15.8) | (21.2) | (42.2) | (46.7) |
| Other financing operations expenses | (14.5) | (12.8) | (29.3) | (24.8) |
| Financing operations income | 36.5 | 20.1 | 57.8 | 32.6 |
| Corporate and other | ||||
| Segment Reporting [Line Items] | ||||
| Income before income taxes | 116.9 | 62.2 | 212.7 | 154.2 |
| Segment reconciling items | ||||
| Segment Reporting [Line Items] | ||||
| Depreciation and amortization | (70.9) | (65.2) | (140.7) | (129.0) |
| Other interest expense | (62.7) | (66.7) | (132.9) | (132.2) |
| Other (expense) income, net | $ 36.2 | $ 48.5 | $ (31.5) | $ 49.3 |
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- Definition Interest expense incurred on vehicle floorplan payable trade and non-trade outstanding during the period. No definition available.
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- Definition Lease Income, Net No definition available.
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- Definition Other Vehicle Operations Expenses No definition available.
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- Definition Rent and Facility Expense No definition available.
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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of interest expense classified as operating. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of interest income (expense) classified as operating. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of lease cost recognized by lessee for lease contract. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of lease income from operating, direct financing, and sales-type leases. Includes, but is not limited to, variable lease payments, interest income, profit (loss) recognized at commencement, and lease payments paid and payable to lessor. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The total amount of other operating income, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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