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GOODWILL AND FRANCHISE VALUE - Schedule of Franchise Value (Details) - Franchise Rights - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Indefinite-lived Intangible Assets [Roll Forward]
Balance as of beginning of period	$ 2,402.2	$ 1,856.2
Additions through acquisitions	172.5	556.5
Reductions through divestitures	(1.3)	(14.5)
Currency translation	(5.3)	4.0
Balance as of end of period	2,568.1	2,402.2
2022 Acquisition
Indefinite-lived Intangible Assets [Roll Forward]
Adjustments to purchase price allocations		363.1
2023 Acquisition
Indefinite-lived Intangible Assets [Roll Forward]
Adjustments to purchase price allocations	$ 172.5	$ 193.4

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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Amount of increase (decrease) of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit, from purchase accounting adjustments.

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Amount of divestiture of an asset lacking physical substance and having a projected indefinite period of benefit to fair value. Excludes financial assets and goodwill.

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