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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2024
Accounting Policies [Abstract] |
Schedule of Other Income | The following is a summary of DTE Energy's Other income:
| 2024 |  | 2023 |  | 2022
| (In millions)
Allowance for equity funds used during construction | $ | 86 |  |  | $ | 42 |  |  | $ | 29 |
Contract services | 34 |  |  | 26 |  |  | 28 |
Investment income(a) | 17 |  |  | 17 |  |  | 3 |
Equity earnings (losses) of equity method investees | 15 |  |  | 3 |  |  | (14) |
Other | 15 |  |  | 14 |  |  | 12 |
| $ | 167 |  |  | $ | 102 |  |  | $ | 58 |
_______________________________________ (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:
| 2024 |  | 2023 |  | 2022
| (In millions)
Allowance for equity funds used during construction | $ | 84 |  |  | $ | 40 |  |  | $ | 26 |
Contract services | 33 |  |  | 25 |  |  | 27 |
Investment income(a) | 13 |  |  | 11 |  |  | 3 |
Other | 14 |  |  | 11 |  |  | 9 |
| $ | 144 |  |  | $ | 87 |  |  | $ | 65 |
_______________________________________ (a)Investment losses are recorded separately to Other expenses on the Consolidated Statements of Operations.
Schedule of Accumulated Other Comprehensive Income (Loss) | The following table summarizes the changes in DTE Energy's Accumulated other comprehensive income (loss) by component(a) for the years ended December 31, 2024 and 2023:
| Net Unrealized Gain (Loss) on Derivatives |  |  |  | Benefit Obligations(b) |  | Foreign Currency Translation |  | Total
| (In millions)
Balance, December 31, 2022 | $ | (4) |  |  |  |  | $ | (58) |  |  | $ | — |  |  | $ | (62) |
Other comprehensive income (loss) before reclassifications | (14) |  |  |  |  | 3 |  |  | 2 |  |  | (9) |
Amounts reclassified from Accumulated other comprehensive loss | 1 |  |  |  |  | 3 |  |  | — |  |  | 4 |
Net current period Other comprehensive income (loss) | (13) |  |  |  |  | 6 |  |  | 2 |  |  | (5) |
Balance, December 31, 2023 | $ | (17) |  |  |  |  | $ | (52) |  |  | $ | 2 |  |  | $ | (67) |
Other comprehensive income (loss) before reclassifications | 47 |  |  |  |  | (3) |  |  | (7) |  |  | 37 |
Amounts reclassified from Accumulated other comprehensive loss | — |  |  |  |  | 4 |  |  | — |  |  | 4 |
Net current period Other comprehensive income (loss) | 47 |  |  |  |  | 1 |  |  | (7) |  |  | 41 |
Balance, December 31, 2024 | $ | 30 |  |  |  |  | $ | (51) |  |  | $ | (5) |  |  | $ | (26) |
______________________________________ (a)All amounts are net of tax, except for foreign currency translation. (b)Benefit obligations activity includes changes in actuarial (gain) loss and prior service cost in DTE Energy's pension and other postretirement benefit plans. Refer to Note 19 to the Consolidated Financial Statements, "Retirement Benefits and Trusteed Assets," for details regarding this activity.
Schedule of Financing Receivables Classified by Internal Grade of Credit Risk | The related credit quality indicators and risk ratings utilized to develop the internal grades have been updated through December 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(a) | $ | — |  |  | $ | 1 |  |  | $ | 4 |  |  | $ | 5 |  |  | $ | 43 |
Internal grade 2 | 622 |  |  | 6 |  |  | 253 |  |  | 881 |  |  | 1 |
Total notes receivable(b) | $ | 622 |  |  | $ | 7 |  |  | $ | 257 |  |  | $ | 886 |  |  | $ | 44 |
Net investment in leases |  |  |  |  |  |  |  |  |
Internal grade 1 | $ | — |  |  | $ | — |  |  | $ | 36 |  |  | $ | 36 |  |  | $ | — |
Internal grade 2 | 4 |  |  | — |  |  | — |  |  | 4 |  |  | — |
Total net investment in leases(b) | $ | 4 |  |  | $ | — |  |  | $ | 36 |  |  | $ | 40 |  |  | $ | — |
_______________________________________ (a)For DTE Electric, includes Notes receivable — Affiliates balance of $42 million originated in 2024 that eliminates in consolidation for DTE Energy. Remaining balance for DTE Electric originated in 2023. (b)For DTE Energy, the current portion is included in Current Assets — Other on the Consolidated Statements of Financial Position. For DTE Electric, the amounts are included in Other Assets — Other on the Consolidated Statements of Financial Position.
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)
Balance at December 31, 2021 | $ | 89 |  |  | $ | 3 |  |  |  |  |  |  | $ | 92 |  |  | $ | 54 |
Current period provision | 49 |  |  | — |  |  |  |  |  |  | 49 |  |  | 33 |
Write-offs charged against allowance | (105) |  |  | (2) |  |  |  |  |  |  | (107) |  |  | (66) |
Recoveries of amounts previously written off | 45 |  |  | — |  |  |  |  |  |  | 45 |  |  | 28 |
Balance at December 31, 2022 | $ | 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 |
Balance at December 31, 2023 | $ | 62 |  |  | $ | 1 |  |  |  |  |  |  | $ | 63 |  |  | $ | 41 |
Current period provision | 74 |  |  | 2 |  |  |  |  |  |  | 76 |  |  | 49 |
Write-offs charged against allowance | (108) |  |  | — |  |  |  |  |  |  | (108) |  |  | (70) |
Recoveries of amounts previously written off | 41 |  |  | — |  |  |  |  |  |  | 41 |  |  | 26 |
Balance at December 31, 2024 | $ | 69 |  |  | $ | 3 |  |  |  |  |  |  | $ | 72 |  |  | $ | 46 |
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:
| Year Ended December 31,
| 2024 |  | 2023 |  | 2022
| (In millions)
DTE Energy | $ | 74 |  |  | $ | 55 |  |  | $ | 55 |
DTE Electric | $ | 50 |  |  | $ | 38 |  |  | $ | 35 |
Schedule of Finite-Lived Intangible Assets | The Registrants have certain Intangible assets as shown below:
|  |  | December 31, 2024 |  | December 31, 2023
| Useful Lives |  | Gross Carrying Value |  | Accumulated Amortization |  | Net Carrying Value |  | Gross Carrying Value |  | Accumulated Amortization |  | Net Carrying Value
|  |  | (In millions)
Intangible assets subject to amortization |  |  |  |  |  |  |  |  |  |  |  |
Contract intangibles | 12 to 26 years |  | $ | 246 |  |  | $ | (119) |  |  | $ | 127 |  |  | $ | 246 |  |  | $ | (103) |  |  | $ | 143 |
Carbon offsets |  |  | 14 |  |  | — |  |  | 14 |  |  | 10 |  |  | — |  |  | 10 |
Renewable energy credits |  |  | 1 |  |  | — |  |  | 1 |  |  | 2 |  |  | — |  |  | 2 |
Other |  |  | 2 |  |  | — |  |  | 2 |  |  | 1 |  |  | — |  |  | 1 |
Intangible assets not subject to amortization(a) |  | 17 |  |  | — |  |  | 17 |  |  | 13 |  |  | — |  |  | 13 |
DTE Energy Long-term intangible assets |  | $ | 263 |  |  | $ | (119) |  |  | $ | 144 |  |  | $ | 259 |  |  | $ | (103) |  |  | $ | 156 |
______________________________________ (a)Amounts are charged to expense, using average cost, as they are consumed in the operation of the business. DTE Electric intangible assets include the Renewable energy credits above, which are included in Other Assets — Other on the DTE Electric Consolidated Statements of Financial Position.
Schedule of Indefinite-Lived Intangible Assets | The Registrants have certain Intangible assets as shown below:
|  |  | December 31, 2024 |  | December 31, 2023
| Useful Lives |  | Gross Carrying Value |  | Accumulated Amortization |  | Net Carrying Value |  | Gross Carrying Value |  | Accumulated Amortization |  | Net Carrying Value
|  |  | (In millions)
Intangible assets subject to amortization |  |  |  |  |  |  |  |  |  |  |  |
Contract intangibles | 12 to 26 years |  | $ | 246 |  |  | $ | (119) |  |  | $ | 127 |  |  | $ | 246 |  |  | $ | (103) |  |  | $ | 143 |
Carbon offsets |  |  | 14 |  |  | — |  |  | 14 |  |  | 10 |  |  | — |  |  | 10 |
Renewable energy credits |  |  | 1 |  |  | — |  |  | 1 |  |  | 2 |  |  | — |  |  | 2 |
Other |  |  | 2 |  |  | — |  |  | 2 |  |  | 1 |  |  | — |  |  | 1 |
Intangible assets not subject to amortization(a) |  | 17 |  |  | — |  |  | 17 |  |  | 13 |  |  | — |  |  | 13 |
DTE Energy Long-term intangible assets |  | $ | 263 |  |  | $ | (119) |  |  | $ | 144 |  |  | $ | 259 |  |  | $ | (103) |  |  | $ | 156 |
______________________________________ (a)Amounts are charged to expense, using average cost, as they are consumed in the operation of the business. DTE Electric intangible assets include the Renewable energy credits above, which are included in Other Assets — Other on the DTE Electric Consolidated Statements of Financial Position.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | The following table summarizes DTE Energy's estimated contract intangible amortization expense expected to be recognized during each year through 2029:
| 2025 |  | 2026 |  | 2027 |  | 2028 |  | 2029
| (In millions)
Estimated amortization expense | $ | 15 |  |  | $ | 15 |  |  | $ | 15 |  |  | $ | 14 |  |  | $ | 14 |
Schedule of Capitalized Cloud Computing Costs | The following balances for cloud computing costs relate to DTE Energy:
| Year Ended December 31,
| 2024 |  | 2023 |  | 2022
| (In millions)
Amortization expense of capitalized cloud computing costs | $ | 12 |  |  | $ | 10 |  |  | $ | 4 |
Gross value of capitalized cloud computing costs | $ | 64 |  |  | $ | 56 |  |  |
Accumulated amortization of capitalized cloud computing costs | $ | 27 |  |  | $ | 15 |  |  |
The following balances for cloud computing costs relate to DTE Electric:
| Year Ended December 31,
| 2024 |  | 2023 |  | 2022
| (In millions)
Amortization expense of capitalized cloud computing costs | $ | 10 |  |  | $ | 8 |  |  | $ | 3 |
Gross value of capitalized cloud computing costs | $ | 51 |  |  | $ | 44 |  |  |
Accumulated amortization of capitalized cloud computing costs | $ | 22 |  |  | $ | 12 |  |  |
Schedule of Accounting Policies | See the following notes for other accounting policies impacting the Registrants’ Consolidated Financial Statements:
Note |  | Title
4 |  | Revenue
5 |  | Property, Plant, and Equipment
7 |  | Asset Retirement Obligations
8 |  | Regulatory Matters
9 |  | Income Taxes
11 |  | Fair Value
12 |  | Financial and Other Derivative Instruments
16 |  | Leases
19 |  | Retirement Benefits and Trusteed Assets
20 |  | Stock-Based Compensation
21 |  | Segment and Related Information
22 |  | Related Party Transactions

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