XML 47 R36.htm IDEA: XBRL DOCUMENT
v3.23.2

Schedule of Change in Asset Retirement Obligations (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2023
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, 2023 |  | December 31, 2022
AROs, beginning of period | $ | 1,905.6 |  |  | $ | 1,749.3 |
Liabilities incurred | 9.7 |  |  | 14.9 |
Liabilities settled | (95.9) |  |  | (205.6) |
Accretion expense | 46.0 |  |  | 81.6 |
Revisions in estimated cash flows | 80.5 |  |  | 264.5 |
Foreign currency translation | 23.4 |  |  | 0.9 |
AROs, end of period | 1,969.3 |  |  | 1,905.6 |
Less current portion | 266.0 |  |  | 212.3 |
Non-current portion of AROs | $ | 1,703.3 |  |  | $ | 1,693.3 |

X
- References No definition available. + Details
Name: | us-gaap_AssetRetirementObligationDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration