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Asset Retirement Obligations (Tables) | 9 Months Ended
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Sep. 30, 2025
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Reconciliation of ARO | A reconciliation of the Asset retirement obligations for the nine months ended September 30, 2025 follows:
| DTE Energy |  | DTE Electric
| (In millions)
Asset retirement obligations at December 31, 2024 | $ | 4,031 |  |  | $ | 3,791 |
Accretion | 176 |  |  | 166 |
Liabilities incurred | 32 |  |  | 32 |
Liabilities settled | (3) |  |  | (3) |
Revision in estimated cash flows(a) | 177 |  |  | 177 |
Asset retirement obligations at September 30, 2025 | $ | 4,413 |  |  | $ | 4,163 |
_______________________________________ (a)Revision in estimated cash flows was primarily due to the impact of the CCR regulations on DTE Electric's coal ash storage facility asset retirement obligations, as well as revision of estimated cash flows related to DTE Electric's Fermi 1 obligations. Refer to Note 14 to the Consolidated Financial Statements, "Commitments and Contingencies," for additional information regarding the CCR regulations.

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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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