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Regulatory Matters (Tables) | 12 Months Ended
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Dec. 31, 2024
Regulatory Assets and Liabilities Disclosure [Abstract] |
Schedule of Regulatory Assets | The following are balances and a brief description of the Registrants' Regulatory assets and liabilities at December 31:
| DTE Energy |  | DTE Electric
| 2024 |  | 2023 |  | 2024 |  | 2023
Assets | (In millions)
Recoverable undepreciated costs on retiring plants | $ | 2,986 |  |  | $ | 2,736 |  |  | $ | 2,986 |  |  | $ | 2,736 |
Recoverable pension and other postretirement costs |  |  |  |  |  |  |
Pension | 1,315 |  |  | 1,421 |  |  | 971 |  |  | 1,045 |
Other postretirement costs | 91 |  |  | 163 |  |  | — |  |  | 67 |
Fermi 2 asset retirement obligation | 951 |  |  | 952 |  |  | 951 |  |  | 952 |
Removal costs asset | 501 |  |  | 223 |  |  | 501 |  |  | 223 |
Enhanced tree trimming program deferred costs | 211 |  |  | 157 |  |  | 211 |  |  | 157 |
Recoverable Michigan income taxes | 119 |  |  | 133 |  |  | 99 |  |  | 110 |
Recoverable income taxes related to AFUDC equity | 116 |  |  | 89 |  |  | 107 |  |  | 80 |
Energy Waste Reduction incentive | 102 |  |  | 90 |  |  | 82 |  |  | 72 |
Renewable ITC offset | 89 |  |  | — |  |  | 89 |  |  | — |
Deferred environmental costs | 43 |  |  | 46 |  |  | — |  |  | — |
Unamortized loss on reacquired debt | 38 |  |  | 41 |  |  | 29 |  |  | 31 |
Customer360 deferred costs | 34 |  |  | 38 |  |  | 34 |  |  | 38 |
Ludington contract dispute costs | 31 |  |  | 10 |  |  | 31 |  |  | 10 |
Accrued PSCR/GCR revenue | — |  |  | 55 |  |  | — |  |  | 55 |
Other | 194 |  |  | 163 |  |  | 135 |  |  | 119 |
| 6,821 |  |  | 6,317 |  |  | 6,226 |  |  | 5,695 |
Less amount included in Current Assets | (50) |  |  | (108) |  |  | (39) |  |  | (99) |
| $ | 6,771 |  |  | $ | 6,209 |  |  | $ | 6,187 |  |  | $ | 5,596 |
Securitized regulatory assets | $ | 690 |  |  | $ | 758 |  |  | $ | 690 |  |  | $ | 758 |
Schedule of Regulatory Liabilities |
| DTE Energy |  | DTE Electric
| 2024 |  | 2023 |  | 2024 |  | 2023
Liabilities | (In millions)
Refundable federal income taxes | $ | 1,733 |  |  | $ | 1,823 |  |  | $ | 1,389 |  |  | $ | 1,463 |
Removal costs liability | 506 |  |  | 342 |  |  | — |  |  | — |
Non-service pension and other postretirement costs | 255 |  |  | 199 |  |  | 94 |  |  | 84 |
Negative other postretirement offset | 214 |  |  | 210 |  |  | 139 |  |  | 142 |
Accrued PSCR/GCR refund | 136 |  |  | 21 |  |  | 111 |  |  | — |
Renewable energy | 90 |  |  | 7 |  |  | 90 |  |  | 7 |
Other | 103 |  |  | 72 |  |  | 86 |  |  | 63 |
| 3,037 |  |  | 2,674 |  |  | 1,909 |  |  | 1,759 |
Less amount included in Current Liabilities | (181) |  |  | (71) |  |  | (156) |  |  | (49) |
| $ | 2,856 |  |  | $ | 2,603 |  |  | $ | 1,753 |  |  | $ | 1,710 |

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