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Business Combination, Dealerships Acquired

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Business Combination, Franchises Acquired

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities To Be Assumed, New, Used And Servie Loaner Vehicles, Fixed Assets, And Parts And Supplies

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities To Be Assumed, Real Estate And Leasehold Improvements

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Number Of Assets Held-For-Sale

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Number Of Dealership Locations, Sold

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Number of Franchises, Sold

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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.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

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Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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The number of businesses acquired by the entity during the period.

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ACQUISITIONS AND DIVESTITURES - Narrative (Details) $ in Millions		3 Months Ended		6 Months Ended
	Jul. 21, 2025 USD ($) dealership collisionCenter franchise	Jun. 30, 2025 USD ($) property	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) franchise business dealership property	Jun. 30, 2024 USD ($) dealership business franchise	Dec. 31, 2024 USD ($) property
Business Acquisition [Line Items]
Goodwill \| $		$ 1,974.7		$ 1,974.7		$ 2,044.7
Number of businesses acquired \| business				0	0
Gain on divestitures, net \| $		$ 5.9	$ 3.6	$ 10.1	$ 3.6
Disposed of by sale \| Delaware
Business Acquisition [Line Items]
Number of dealership locations, sold (in dealership locations) \| dealership					1
Disposed of by sale \| Delaware \| Lexus Franchise
Business Acquisition [Line Items]
Number of franchises, sold (in franchises)					1
Disposed of by sale \| Colorado \| Nissan Franchise
Business Acquisition [Line Items]
Number of franchises, sold (in franchises)				1	1
Number of dealership locations, sold (in dealership locations) \| dealership				1	1
Disposed of by sale \| SOUTH CAROLINA \| Volvo Franchise
Business Acquisition [Line Items]
Number of franchises, sold (in franchises)				1
Number of dealership locations, sold (in dealership locations) \| dealership				1
Disposed of by sale \| CALIFORNIA \| Toyota Franchise
Business Acquisition [Line Items]
Number of franchises, sold (in franchises)				2
Number of dealership locations, sold (in dealership locations) \| dealership				2
Disposed of by sale \| UTAH
Business Acquisition [Line Items]
Number of franchises, sold (in franchises)				3
Disposed of by sale \| UTAH \| Chevrolet Franchise
Business Acquisition [Line Items]
Number of franchises, sold (in franchises)				1
Number of dealership locations, sold (in dealership locations) \| dealership				1
Disposed of by sale \| UTAH \| Chrysler Jeep Dodge Ram Franchise
Business Acquisition [Line Items]
Number of franchises, sold (in franchises)				1
Number of dealership locations, sold (in dealership locations) \| dealership				1
Disposed of by sale \| UTAH \| Ford Franchise
Business Acquisition [Line Items]
Number of franchises, sold (in franchises)				1
Number of dealership locations, sold (in dealership locations) \| dealership				1
Disposed of by sale \| GEORGIA \| Nissan Franchise
Business Acquisition [Line Items]
Number of franchises, sold (in franchises)					1
Number of dealership locations, sold (in dealership locations) \| dealership					1
Held-for-sale \| Real Estate
Business Acquisition [Line Items]
Number of assets held-for-sale \| property		2		2		1
Herb Chambers Dealerships
Business Acquisition [Line Items]
Acquisition related costs \| $				$ 5.1
Herb Chambers Dealerships \| Subsequent Event
Business Acquisition [Line Items]
Aggregate purchase price \| $	$ 1,820.0
Goodwill \| $	750.0
Real estate and leasehold improvements acquired \| $	610.0
New vehicles, used vehicles, service loaner vehicles, fixed assets and parts and supplies \| $	$ 460.0
Dealerships acquired \| dealership	33
Franchises acquired	52
Collision centers acquired \| collisionCenter	3