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Business Combinations - Narrative (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($) dealership franchise | Dec. 31, 2023 shop center dealership franchise
Business Combination, Separately Recognized Transactions [Line Items] |  |
Revenue from date of acquisition of companies acquired | $ | $ 1,200.0 |
Pre-tax income from date of acquisition of companies acquired | $ | $ 27.8 |
U.K. | Retail automotive dealership | Franchised Dealerships |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |
Number of franchises acquired | 16 |
Italy | Retail automotive dealership | Franchised Dealerships |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |
Number of franchises acquired | 2 | 2
Italy | Retail automotive dealership | Body Shops |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |
Number of franchises acquired | shop |  | 1
AUSTRALIA | Retail automotive dealership | Franchised Dealerships |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |
Number of franchises acquired | 3 |
AUSTRALIA | Retail automotive dealership | CarShop Used Vehicle Dealerships |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |
Number of franchises acquired | dealership | 1 |
AUSTRALIA | Commercial vehicle distribution and other | Service Centers |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |
Number of franchises acquired | center |  | 1
U.S. | Retail automotive dealership | Franchised Dealerships |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |
Number of franchises acquired |  | 2
U.S. | Retail automotive dealership | Franchised Dealerships | Ford | Nonrelated Party |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |
Number of franchises acquired | 1 |
U.S. | Retail commercial truck dealership | Franchised Dealerships | Full-Service Dealership |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |
Number of franchises acquired | dealership | 3 |
U.S. | Retail commercial truck dealership | Franchised Dealerships | Collision Center |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |
Number of franchises acquired | dealership | 2 |
Canada | Retail automotive dealership | Service And Parts |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |
Number of franchises acquired | center |  | 2
Canada | Retail commercial truck dealership | Franchised Dealerships | Full-Service Dealership |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |
Number of franchises acquired | dealership |  | 3

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