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Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2024
Accounting Policies [Abstract] |
Schedule of Other Income | The following is a summary of DTE Energy's Other income:
|  |  | Three Months Ended March 31,
|  |  |  |  | 2024 |  | 2023
|  |  |  |  | (In millions)
Allowance for equity funds used during construction |  |  |  |  | $ | 18 |  |  | $ | 9 |
Contract services |  |  |  |  | 7 |  |  | 6 |
Investment income(a) |  |  |  |  | 6 |  |  | 5 |
Equity earnings (losses) of equity method investees |  |  |  |  | (8) |  |  | 4 |
Other |  |  |  |  | 4 |  |  | 2 |
|  |  |  |  | $ | 27 |  |  | $ | 26 |
_______________________________________ (a)Investment losses are recorded separately to Other expenses on the Consolidated Statements of Operations. The following is a summary of DTE Electric's Other income:
|  |  | Three Months Ended March 31,
|  |  |  |  | 2024 |  | 2023
|  |  |  |  | (In millions)
Allowance for equity funds used during construction |  |  |  |  | $ | 18 |  |  | $ | 9 |
Contract services |  |  |  |  | 6 |  |  | 6 |
Investment income(a) |  |  |  |  | 5 |  |  | 3 |
Other |  |  |  |  | 3 |  |  | 2 |
|  |  |  |  | $ | 32 |  |  | $ | 20 |
_______________________________________ (a)Investment losses are recorded separately to Other expenses on the Consolidated Statements of Operations.
Schedule of Effective Income Tax Rate Reconciliation | The tables below summarize how the Registrants' effective income tax rates have varied from the statutory federal income tax rate:
|  |  | Three Months Ended March 31,
|  |  |  |  | 2024 |  | 2023
DTE Energy |  |  |  |  |  |  |
Statutory federal income tax rate |  |  |  |  | 21.0 | % |  | 21.0 | %
Increase (decrease) due to: |  |  |  |  |  |  |
State and local income taxes, net of federal benefit |  |  |  |  | 4.1 |  |  | 4.4 |
Production tax credits |  |  |  |  | (8.7) |  |  | (6.2) |
TCJA regulatory liability amortization |  |  |  |  | (4.9) |  |  | (4.1) |
Investment tax credits |  |  |  |  | (3.1) |  |  | (2.3) |
AFUDC equity |  |  |  |  | (1.2) |  |  | (0.3) |
Enactment of West Virginia income tax legislation, net of federal benefit |  |  |  |  | — |  |  | (1.2) |
Other |  |  |  |  | (1.0) |  |  | (1.2) |
Effective income tax rate |  |  |  |  | 6.2 | % |  | 10.1 | %
|  |  | Three Months Ended March 31,
|  |  |  |  | 2024 |  | 2023
DTE Electric |  |  |  |  |  |  |
Statutory federal income tax rate |  |  |  |  | 21.0 | % |  | 21.0 | %
Increase (decrease) due to: |  |  |  |  |  |  |
State and local income taxes, net of federal benefit |  |  |  |  | 5.3 |  |  | 5.6 |
Production tax credits |  |  |  |  | (10.2) |  |  | (7.1) |
TCJA regulatory liability amortization |  |  |  |  | (5.1) |  |  | (4.5) |
AFUDC equity |  |  |  |  | (1.5) |  |  | (0.3) |
Other |  |  |  |  | 0.1 |  |  | (0.5) |
Effective income tax rate |  |  |  |  | 9.6 | % |  | 14.2 | %
Schedule of Financing Receivables Classified by Internal Grade of Credit Risk | The following represents the Registrants' financing receivables by year of origination, classified by internal grade of credit risk, including current year-to-date gross write-offs, if any. The related credit quality indicators and risk ratings utilized to develop the internal grades have been updated through March 31, 2024.
| DTE Energy |  | DTE Electric
| Year of Origination
| 2024 |  | 2023 |  | 2022 and Prior |  | Total |  | 2024 and Prior
| (In millions)
Notes receivable |  |  |  |  |  |  |  |  |
Internal grade 1 | $ | — |  |  | $ | 15 |  |  | $ | 4 |  |  | $ | 19 |  |  | $ | 15 |
Internal grade 2 | 364 |  |  | 8 |  |  | 26 |  |  | 398 |  |  | 1 |
Total notes receivable(a) | $ | 364 |  |  | $ | 23 |  |  | $ | 30 |  |  | $ | 417 |  |  | $ | 16 |
Net investment in leases |  |  |  |  |  |  |  |  |
Internal grade 1 | $ | — |  |  | $ | — |  |  | $ | 36 |  |  | $ | 36 |  |  | $ | — |
Internal grade 2 | 122 |  |  | — |  |  | 247 |  |  | 369 |  |  | — |
Total net investment in leases(a) | $ | 122 |  |  | $ | — |  |  | $ | 283 |  |  | $ | 405 |  |  | $ | — |
_______________________________________ (a)For DTE Energy and DTE Electric, the current portion is included in Current Assets — Other on the respective Consolidated Statements of Financial Position. For DTE Electric, the noncurrent portion is included in Other Assets — Other.
Schedule of Roll-Forward of Activity for Financing Receivables Credit Loss Reserves | The following tables present a roll-forward of the activity for the Registrants' financing receivables credit loss reserves:
| DTE Energy |  | DTE Electric
| Trade accounts receivable |  | Other receivables |  |  |  |  |  | Total |  | Trade and other accounts receivable
| (In millions)
Beginning reserve balance, January 1, 2024 | $ | 62 |  |  | $ | 1 |  |  |  |  |  |  | $ | 63 |  |  | $ | 41 |
Current period provision | 20 |  |  | — |  |  |  |  |  |  | 20 |  |  | 9 |
Write-offs charged against allowance | (26) |  |  | — |  |  |  |  |  |  | (26) |  |  | (18) |
Recoveries of amounts previously written off | 12 |  |  | — |  |  |  |  |  |  | 12 |  |  | 8 |
Ending reserve balance, March 31, 2024 | $ | 68 |  |  | $ | 1 |  |  |  |  |  |  | $ | 69 |  |  | $ | 40 |
| DTE Energy |  | DTE Electric
| Trade accounts receivable |  | Other receivables |  |  |  |  |  | Total |  | Trade and other accounts receivable
| (In millions)
Beginning reserve balance, January 1, 2023 | $ | 78 |  |  | $ | 1 |  |  |  |  |  |  | $ | 79 |  |  | $ | 49 |
Current period provision | 52 |  |  | — |  |  |  |  |  |  | 52 |  |  | 36 |
Write-offs charged against allowance | (112) |  |  | — |  |  |  |  |  |  | (112) |  |  | (72) |
Recoveries of amounts previously written off | 44 |  |  | — |  |  |  |  |  |  | 44 |  |  | 28 |
Ending reserve balance, December 31, 2023 | $ | 62 |  |  | $ | 1 |  |  |  |  |  |  | $ | 63 |  |  | $ | 41 |
Schedule of Uncollectible Expense | Uncollectible expense for the Registrants is primarily comprised of the current period provision for allowance for doubtful accounts and is summarized as follows:
|  |  | Three Months Ended March 31,
|  |  |  |  | 2024 |  | 2023
|  |  |  |  | (In millions)
DTE Energy |  |  |  |  | $ | 21 |  |  | $ | 22 |
DTE Electric |  |  |  |  | $ | 10 |  |  | $ | 8 |

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