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ASSET RETIREMENT OBLIGATIONS - Schedule of Asset Retirement Obligations Operating Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Asset Retirement Obligation Disclosure [Abstract] |  |  |  |
Accretion | $ 5.0 | $ 3.7 | $ 14.0 | $ 10.8
Depreciation | 2.4 | 3.2 | 10.4 | 8.4
Total ARO operating costs | $ 7.4 | $ 6.9 | $ 24.4 | $ 19.2

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- Definition Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481879/410-20-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476148/220-40-50-22 + Details
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- Definition Amount of depreciation expense recognized during the period that is associated with an asset retirement cost. + References No definition available. + Details
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- Definition Cost Incurred, Asset Retirement Obligation + References No definition available. + Details
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