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Property, Plant, and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2024
Property, Plant and Equipment [Abstract] |
PP&E by Classification, Summary of Depreciation and Amortization | The following is a summary of Property, plant, and equipment by classification as of December 31:
| 2024 |  | 2023
Property, plant, and equipment | (In millions)
DTE Electric |  |  |
Distribution | $ | 14,995 |  |  | $ | 13,673 |
Dispatchable generation | 8,428 |  |  | 7,969 |
Renewable generation | 3,933 |  |  | 3,074 |
Other | 3,445 |  |  | 3,220 |
Total DTE Electric | 30,801 |  |  | 27,936 |
DTE Gas |  |  |
Distribution | 6,334 |  |  | 5,838 |
Transmission | 1,212 |  |  | 1,132 |
Storage | 586 |  |  | 578 |
Other | 500 |  |  | 481 |
Total DTE Gas | 8,632 |  |  | 8,029 |
DTE Vantage | 1,135 |  |  | 1,075 |
Other | 272 |  |  | 234 |
Total DTE Energy | $ | 40,840 |  |  | $ | 37,274 |
Accumulated depreciation and amortization |  |  |
DTE Electric |  |  |
Distribution | $ | (3,513) |  |  | $ | (3,205) |
Dispatchable generation | (2,146) |  |  | (1,872) |
Renewable generation | (615) |  |  | (524) |
Other | (1,130) |  |  | (969) |
Total DTE Electric | (7,404) |  |  | (6,570) |
DTE Gas |  |  |
Distribution | (1,319) |  |  | (1,365) |
Transmission | (278) |  |  | (300) |
Storage | (138) |  |  | (132) |
Other | (210) |  |  | (193) |
Total DTE Gas | (1,945) |  |  | (1,990) |
DTE Vantage | (520) |  |  | (479) |
Other | (78) |  |  | (66) |
Total DTE Energy | $ | (9,947) |  |  | $ | (9,105) |
Net DTE Energy Property, plant, and equipment | $ | 30,893 |  |  | $ | 28,169 |
Net DTE Electric Property, plant, and equipment | $ | 23,397 |  |  | $ | 21,366 |
The following is a summary of Depreciation and amortization expense for DTE Energy:
| 2024 |  | 2023 |  | 2022
| (In millions)
Property, plant, and equipment | $ | 1,316 |  |  | $ | 1,239 |  |  | $ | 1,148 |
Regulatory assets and liabilities | 394 |  |  | 344 |  |  | 297 |
Intangible assets | 16 |  |  | 15 |  |  | 16 |
Other | 6 |  |  | 8 |  |  | 7 |
| $ | 1,732 |  |  | $ | 1,606 |  |  | $ | 1,468 |
The following is a summary of Depreciation and amortization expense for DTE Electric:
| 2024 |  | 2023 |  | 2022
| (In millions)
Property, plant, and equipment | $ | 1,089 |  |  | $ | 1,029 |  |  | $ | 951 |
Regulatory assets and liabilities | 338 |  |  | 292 |  |  | 248 |
Other | 5 |  |  | 5 |  |  | 5 |
| $ | 1,432 |  |  | $ | 1,326 |  |  | $ | 1,204 |
Schedule of AFUDC and Capitalized Interest Rates | The AFUDC and capitalized interest rates were as follows for the years ended December 31:
| 2024 |  | 2023 |  | 2022
DTE Electric AFUDC | 5.56 | % |  | 5.53 | % |  | 5.46 | %
DTE Gas AFUDC | 5.45 | % |  | 5.41 | % |  | 5.41 | %
Non-regulated businesses capitalized interest | 4.25 | % |  | 3.00 | % |  | 3.00 | %
Schedule of AFUDC and Interest Capitalized | The following is a summary of AFUDC and interest capitalized for the years ended December 31:
| 2024 |  | 2023 |  | 2022
DTE Energy | (In millions)
Allowance for debt funds used during construction and interest capitalized | $ | 36 |  |  | $ | 20 |  |  | $ | 13 |
Allowance for equity funds used during construction | 86 |  |  | 42 |  |  | 29 |
Total | $ | 122 |  |  | $ | 62 |  |  | $ | 42 |
| 2024 |  | 2023 |  | 2022
DTE Electric | (In millions)
Allowance for debt funds used during construction | $ | 34 |  |  | $ | 15 |  |  | $ | 11 |
Allowance for equity funds used during construction | 84 |  |  | 40 |  |  | 26 |
Total | $ | 118 |  |  | $ | 55 |  |  | $ | 37 |
Schedule of Utility Property, Plant, and Equipment | The average estimated useful life for each major class of utility Property, plant, and equipment as of December 31, 2024 follows:
|  | Estimated Useful Lives in Years
Utility |  | Distribution |  | Generation |  | Transmission |  | Storage
DTE Electric |  | 38 |  | 32 |  | N/A |  | N/A
DTE Gas |  | 55 |  | N/A |  | 67 |  | 60
Schedule of Capitalized Software | The following balances for capitalized software relate to DTE Energy:
| Year Ended December 31,
| 2024 |  | 2023 |  | 2022
| (In millions)
Amortization expense of capitalized software | $ | 192 |  |  | $ | 189 |  |  | $ | 159 |
Gross carrying value of capitalized software | $ | 1,005 |  |  | $ | 940 |  |  |
Accumulated amortization of capitalized software | $ | 476 |  |  | $ | 427 |  |  |
The following balances for capitalized software relate to DTE Electric:
| Year Ended December 31,
| 2024 |  | 2023 |  | 2022
| (In millions)
Amortization expense of capitalized software | $ | 175 |  |  | $ | 172 |  |  | $ | 146 |
Gross carrying value of capitalized software | $ | 910 |  |  | $ | 849 |  |  |
Accumulated amortization of capitalized software | $ | 414 |  |  | $ | 369 |  |  |

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