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Asset Retirement Obligations | 12 Months Ended
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Dec. 31, 2024
Asset Retirement Obligations [Abstract] |
Asset Retirement Obligations | 27. ASSET RETIREMENT OBLIGATIONS AROs mostly relate to reclamation of land at the thermal, hydro and combustion turbine sites; and the disposal of polychlorinated biphenyls in transmission and distribution equipment and a pipeline site. Certain hydro, transmission and distribution assets may have additional AROs that cannot be measured as these assets are expected to be used for an indefinite period and, as a result, a reasonable estimate of the FV of any related ARO cannot be made. The change in ARO for the years ended December 31 is as follows: millions of dollars 2024 2023 Balance, January 1 $ 192 $ 174 Additions 11 - Accretion included in depreciation expense 10 9 Change in FX rate 5 (1) Revisions in estimated cash flows 2 - Accretion deferred to regulatory asset (included in PP&E) - 18 Classified as assets held for sale (1) (1) - Liabilities settled (2) (8) Balance, December 31 $ 217 $ 192 (1) As at December 31, 2024, NMGC's assets and liabilities were classified as held for sale. For further details on the pending transaction, refer to note 4.

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- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/410-20/tableOfContent Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 20 -Topic 410 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-2 + Details
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