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Schedule of Change in Asset Retirement Obligations (Tables) | 3 Months Ended
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Mar. 31, 2024
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) | March 31, 2024 |  | December 31, 2023
AROs, beginning of period | $ | 2,213.4 |  |  | $ | 1,905.6 |
Liabilities incurred | 8.8 |  |  | 22.9 |
Liabilities settled | (49.5) |  |  | (198.5) |
Accretion expense | 27.2 |  |  | 96.1 |
Revisions in estimated cash flows | 14.2 |  |  | 365.1 |
Foreign currency translation | (12.0) |  |  | 22.2 |
AROs, end of period | 2,202.1 |  |  | 2,213.4 |
Less current portion | 389.2 |  |  | 377.4 |
Non-current portion of AROs | $ | 1,812.9 |  |  | $ | 1,836.0 |

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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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