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Property, Plant, and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2022
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:
| 2022 |  | 2021
Property, plant, and equipment | (In millions)
DTE Electric |  |  |
Zero carbon generation |  |  |
Nuclear | $ | 3,684 |  |  | $ | 3,394 |
Renewables | 2,567 |  |  | 2,522 |
Fossil and other generation | 8,789 |  |  | 8,640 |
Distribution | 12,502 |  |  | 11,414 |
Other | 3,049 |  |  | 2,879 |
Total DTE Electric | 30,591 |  |  | 28,849 |
DTE Gas |  |  |
Distribution | 5,376 |  |  | 4,900 |
Storage | 607 |  |  | 593 |
Transmission and other | 1,534 |  |  | 1,415 |
Total DTE Gas | 7,517 |  |  | 6,908 |
DTE Vantage | 1,059 |  |  | 1,118 |
Other | 179 |  |  | 208 |
Total DTE Energy | $ | 39,346 |  |  | $ | 37,083 |
Accumulated depreciation and amortization |  |  |
DTE Electric |  |  |
Zero carbon generation |  |  |
Nuclear | $ | (428) |  |  | $ | (413) |
Renewables | (426) |  |  | (357) |
Fossil and other generation | (3,352) |  |  | (3,214) |
Distribution | (3,040) |  |  | (2,842) |
Other | (849) |  |  | (850) |
Total DTE Electric | (8,095) |  |  | (7,676) |
DTE Gas |  |  |
Distribution | (1,330) |  |  | (1,265) |
Storage | (163) |  |  | (154) |
Transmission and other | (461) |  |  | (426) |
Total DTE Gas | (1,954) |  |  | (1,845) |
DTE Vantage | (469) |  |  | (545) |
Other | (61) |  |  | (73) |
Total DTE Energy | $ | (10,579) |  |  | $ | (10,139) |
Net DTE Energy Property, plant, and equipment | $ | 28,767 |  |  | $ | 26,944 |
Net DTE Electric Property, plant, and equipment | $ | 22,496 |  |  | $ | 21,173 |
The following is a summary of Depreciation and amortization expense for DTE Energy:
| 2022 |  | 2021 |  | 2020
| (In millions)
Property, plant, and equipment | $ | 1,148 |  |  | $ | 1,095 |  |  | $ | 1,025 |
Regulatory assets and liabilities | 297 |  |  | 259 |  |  | 244 |
Intangible assets | 16 |  |  | 16 |  |  | 16 |
Other | 7 |  |  | 7 |  |  | 7 |
| $ | 1,468 |  |  | $ | 1,377 |  |  | $ | 1,292 |
The following is a summary of Depreciation and amortization expense for DTE Electric:
| 2022 |  | 2021 |  | 2020
| (In millions)
Property, plant, and equipment | $ | 951 |  |  | $ | 890 |  |  | $ | 831 |
Regulatory assets and liabilities | 248 |  |  | 214 |  |  | 207 |
Other | 5 |  |  | 5 |  |  | 5 |
| $ | 1,204 |  |  | $ | 1,109 |  |  | $ | 1,043 |
Schedule of AFUDC and Capitalized Interest Rates | The AFUDC and capitalized interest rates were as follows for the years ended December 31:
| 2022 |  | 2021 |  | 2020
DTE Electric AFUDC | 5.46 | % |  | 5.46 | % |  | 5.47 | %
DTE Gas AFUDC | 5.41 | % |  | 5.55 | % |  | 5.56 | %
Non-regulated businesses capitalized interest | 3.00 | % |  | 3.30 | % |  | 3.90 | %
Schedule of AFUDC and Interest Capitalized | The following is a summary of AFUDC and interest capitalized for the years ended December 31:
| 2022 |  | 2021 |  | 2020
DTE Energy | (In millions)
Allowance for debt funds used during construction and interest capitalized | $ | 13 |  |  | $ | 12 |  |  | $ | 11 |
Allowance for equity funds used during construction | 29 |  |  | 27 |  |  | 25 |
Total | $ | 42 |  |  | $ | 39 |  |  | $ | 36 |
| 2022 |  | 2021 |  | 2020
DTE Electric | (In millions)
Allowance for debt funds used during construction | $ | 11 |  |  | $ | 11 |  |  | $ | 10 |
Allowance for equity funds used during construction | 26 |  |  | 25 |  |  | 23 |
Total | $ | 37 |  |  | $ | 36 |  |  | $ | 33 |
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, 2022 follows:
|  | Estimated Useful Lives in Years
Utility |  | Generation |  | Distribution |  | Storage
DTE Electric |  | 34 |  | 38 |  | N/A
DTE Gas |  | N/A |  | 49 |  | 58
Schedule of Capitalized Software | The following balances for capitalized software relate to DTE Energy:
| Year Ended December 31,
| 2022 |  | 2021 |  | 2020
| (In millions)
Amortization expense of capitalized software | $ | 159 |  |  | $ | 145 |  |  | $ | 128 |
Gross carrying value of capitalized software | $ | 796 |  |  | $ | 920 |  |  |
Accumulated amortization of capitalized software | $ | 406 |  |  | $ | 493 |  |  |
The following balances for capitalized software relate to DTE Electric:
| Year Ended December 31,
| 2022 |  | 2021 |  | 2020
| (In millions)
Amortization expense of capitalized software | $ | 146 |  |  | $ | 132 |  |  | $ | 118 |
Gross carrying value of capitalized software | $ | 692 |  |  | $ | 826 |  |  |
Accumulated amortization of capitalized software | $ | 343 |  |  | $ | 439 |  |  |

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