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GOODWILL AND FRANCHISE VALUE - Schedule of Goodwill (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Goodwill [Roll Forward] |  |
Beginning balance | $ 1,930.6 | $ 1,460.7
Additions through acquisitions | 105.5 | 519.1
Reductions through divestitures | (0.2) | (51.1)
Currency translation | (1.8) | 1.9
Ending balance | 2,081.7 | 1,930.6
Adjustments to purchase price allocations | 47.6 |
2022 Acquisition |  |
Goodwill [Roll Forward] |  |
Adjustments to purchase price allocations |  | 285.9
2023 Acquisition |  |
Goodwill [Roll Forward] |  |
Additions through acquisitions | 105.5 |
Adjustments to purchase price allocations | 47.6 | 233.2
Vehicle Operations |  |
Goodwill [Roll Forward] |  |
Beginning balance | 1,913.0 | 1,443.5
Additions through acquisitions | 105.5 | 519.1
Reductions through divestitures | (0.2) | (51.1)
Currency translation | (1.8) | 1.5
Ending balance | 2,064.1 | 1,913.0
Adjustments to purchase price allocations | 47.6 |
Financing Operations |  |
Goodwill [Roll Forward] |  |
Beginning balance | 17.6 | 17.2
Additions through acquisitions | 0.0 | 0.0
Reductions through divestitures | 0.0 | 0.0
Currency translation | 0.0 | 0.4
Ending balance | 17.6 | $ 17.6
Adjustments to purchase price allocations | $ 0.0 |

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