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Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2025
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Changes to Asset Retirement Obligations
Changes to Asset retirement obligations for the years ended December 31, 2025, 2024, and 2023 were as follows:
202520242023
DTE Energy(In millions)
Asset retirement obligations at January 1$4,031 $3,556 $3,460 
Accretion239 211 198 
Liabilities incurred32 324 7 
Liabilities settled(10)(14)(96)
Revision in estimated cash flows(a)
177 (46)(13)
Asset retirement obligations at December 31$4,469 $4,031 $3,556 
_______________________________________
(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 18 to the Consolidated Financial Statements, "Commitments and Contingencies," for additional information regarding the CCR regulations.
202520242023
DTE Electric(In millions)
Asset retirement obligations at January 1$3,791 $3,326 $3,221 
Accretion226 199 185 
Liabilities incurred32 323 4 
Liabilities settled(9)(11)(81)
Revision in estimated cash flows(a)
177 (46)(3)
Asset retirement obligations at December 31$4,217 $3,791 $3,326 
_______________________________________
(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 18 to the Consolidated Financial Statements, "Commitments and Contingencies," for additional information regarding the CCR regulations.