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ASSET RETIREMENT OBLIGATIONS (Tables) | 12 Months Ended
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Dec. 31, 2024
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Asset Retirement Obligations, Operating Costs | For the years ended December 31, ARO operating costs related to accretion of the liabilities and depreciation of the assets are as follows:
in millions | 2024 | 2023 | 2022
Accretion | $ | 14.7 |  | $ | 13.9 |  | $ | 14.1 |
Depreciation | 12.5 |  | 9.0 |  | 9.4 |
Total ARO operating costs | $ | 27.2 |  | $ | 22.9 |  | $ | 23.5 |
Schedule of Reconciliations of Asset Retirement Obligations | Reconciliations of the carrying amounts of our AROs for the years ended December 31 are as follows:
in millions | 2024 | 2023
ARO balance at beginning of year | $ | 324.1 |  | $ | 311.3 |
Liabilities incurred | 42.3 |  | 0.0 |
Liabilities settled | (19.1) |  | (9.9) |
Accretion expense | 14.7 |  | 13.9 |
Revisions, net | 65.4 |  | 8.8 |
ARO balance at end of year | $ | 427.4 |  | $ | 324.1 |

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 + Details
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- Definition The tabular disclosure of asset retirement obligations operating costs. + References No definition available. + Details
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