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INTANGIBLE FRANCHISE RIGHTS AND GOODWILL - Roll-Forward of Intangible Franchise Rights by Reportable Segment (Details) - Intangible Franchise Rights $ in Millions	Dec. 31, 2021 USD ($)
Indefinite-lived Intangible Assets
Balance, December 31, 2020	$ 232.8
Balance, December 31, 2021	392.3
U.S.
Indefinite-lived Intangible Assets
Balance, December 31, 2020	213.4
Balance, December 31, 2021	372.0
U.K.
Indefinite-lived Intangible Assets
Balance, December 31, 2020	19.4
Balance, December 31, 2021	$ 20.4

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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