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Schedule of Change in Asset Retirement Obligations (Tables) | 6 Months Ended
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Jun. 30, 2025
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Change in Asset Retirement Obligation [Table Text Block] | A reconciliation of our AROs is as follows:
(in millions) | June 30, 2025 |  | December 31, 2024
AROs, beginning of period | $ | 2,572.2 |  |  | $ | 2,213.4 |
Liabilities incurred | 11.1 |  |  | 29.8 |
Liabilities settled | (154.8) |  |  | (253.8) |
Accretion expense | 64.8 |  |  | 111.2 |
Revisions in estimated cash flows | 55.6 |  |  | 541.4 |
Foreign currency translation | 39.2 |  |  | (69.8) |
AROs, end of period | 2,588.1 |  |  | 2,572.2 |
Less current portion | 306.1 |  |  | 352.8 |
Non-current portion of AROs | $ | 2,282.0 |  |  | $ | 2,219.4 |

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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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