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GOODWILL AND FRANCHISE VALUE - Schedule of Franchise Value (Details) - Franchise Rights - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 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	140.8	556.5
Reductions through divestitures	(1.2)	(14.5)
Currency translation	(3.8)	4.0
Balance as of end of period	2,538.0	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	$ 140.8	$ 193.4

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482665/350-30-50-2

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