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ASSET RETIREMENT OBLIGATIONS (Tables) | 3 Months Ended
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Mar. 31, 2025
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Asset Retirement Obligations Operating Costs | ARO operating costs related to accretion of the liabilities and depreciation of the assets are as follows:
| Three Months Ended March 31 |
in millions | 2025 | 2024 |  |
Accretion | $ | 4.3 |  | $ | 3.5 |  |  |
Depreciation | 3.9 |  | 2.4 |  |  |
Total ARO operating costs | $ | 8.2 |  | $ | 5.9 |  |  |
Schedule of Reconciliations of Asset Retirement Obligations | Reconciliations of the carrying amounts of our ARO liabilities are as follows:
| Three Months Ended March 31 |
in millions | 2025 | 2024 |  |
ARO liability balance at beginning of period | $ | 427.4 |  | $ | 324.1 |  |  |
Liabilities incurred | 0.0 |  | 0.0 |  |  |
Liabilities settled | (5.9) |  | (1.8) |  |  |
Accretion expense | 4.3 |  | 3.5 |  |  |
Revisions, net | 3.7 |  | (0.1) |  |  |
ARO liability balance at end of period | $ | 429.5 |  | $ | 325.7 |  |  |

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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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