FRANCHISE RIGHTS AND OTHER INTANGIBLE ASSETS - Schedule of Goodwill and Intangible Assets (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
Jun. 30, 2025 |
Sep. 30, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Indefinite-lived intangible assets: | ||||
| Franchise rights | $ 127.0 | $ 161.0 | ||
| Goodwill | 0.8 | 0.8 | ||
| Total indefinite-lived intangible assets | 127.8 | 161.8 | ||
| Definite-lived intangible assets, net | 0.0 | 0.1 | ||
| Intangible assets, net | 127.8 | 161.9 | ||
| Goodwill, impairment loss | $ 0.0 | $ 241.7 | ||
| Franchise Rights | ||||
| Indefinite-lived intangible assets: | ||||
| Total indefinite-lived intangible assets | 343.0 | 343.0 | ||
| Impairment of indefinite-lived intangible assets | $ 216.0 | $ 182.0 | ||
| X | ||||||||||
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount before accumulated amortization of intangible assets, excluding goodwill. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Details
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