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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2023
Accounting Policies [Abstract] |
Schedule of Other Income | The following is a summary of DTE Energy's Other income:
| 2023 |  | 2022 |  | 2021
| (In millions)
Allowance for equity funds used during construction | $ | 42 |  |  | $ | 29 |  |  | $ | 27 |
Contract services | 26 |  |  | 28 |  |  | 27 |
Investment income(a) | 17 |  |  | 3 |  |  | 14 |
Equity earnings (losses) of equity method investees | 3 |  |  | (14) |  |  | 38 |
Income from REF entities | — |  |  | — |  |  | 141 |
Other | 14 |  |  | 12 |  |  | 7 |
| $ | 102 |  |  | $ | 58 |  |  | $ | 254 |
_______________________________________ (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:
| 2023 |  | 2022 |  | 2021
| (In millions)
Allowance for equity funds used during construction | $ | 40 |  |  | $ | 26 |  |  | $ | 25 |
Contract services | 25 |  |  | 27 |  |  | 27 |
Investment income(a) | 11 |  |  | 3 |  |  | 10 |
Other | 11 |  |  | 9 |  |  | 9 |
| $ | 87 |  |  | $ | 65 |  |  | $ | 71 |
_______________________________________ (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, 2023 and 2022:
| Net Unrealized Gain (Loss) on Derivatives |  |  |  | Benefit Obligations(b) |  | Foreign Currency Translation |  | Total
| (In millions)
Balance, December 31, 2021 | $ | (11) |  |  |  |  | $ | (101) |  |  | $ | — |  |  | $ | (112) |
Other comprehensive income before reclassifications | 5 |  |  |  |  | — |  |  | — |  |  | 5 |
Amounts reclassified from Accumulated other comprehensive loss | 2 |  |  |  |  | 43 |  |  | — |  |  | 45 |
Net current period Other comprehensive income | 7 |  |  |  |  | 43 |  |  | — |  |  | 50 |
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) |
______________________________________ (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 20 to the Consolidated Financial Statements, "Retirement Benefits and Trusteed Assets", for details regarding this activity. For 2022, the change in benefit obligations due to actuarial (gain) loss increased from prior years, primarily due to higher discount rates and other plan changes.
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 December 31, 2023.
| DTE Energy |  | DTE Electric
| Year of origination
| 2023 |  | 2022 |  | 2021 and prior |  | Total |  | 2023 and prior
| (In millions)
Notes receivable |  |  |  |  |  |  |  |  |
Internal grade 1 | $ | 19 |  |  | $ | — |  |  | $ | 4 |  |  | $ | 23 |  |  | $ | 18 |
Internal grade 2 | 23 |  |  | 112 |  |  | 17 |  |  | 152 |  |  | 1 |
Total notes receivable(a) | $ | 42 |  |  | $ | 112 |  |  | $ | 21 |  |  | $ | 175 |  |  | $ | 19 |
Net investment in leases |  |  |  |  |  |  |  |  |
Internal grade 1 | $ | — |  |  | $ | — |  |  | $ | 37 |  |  | $ | 37 |  |  | $ | — |
Internal grade 2 | — |  |  | 66 |  |  | 184 |  |  | 250 |  |  | — |
Total net investment in leases(a) | $ | — |  |  | $ | 66 |  |  | $ | 221 |  |  | $ | 287 |  |  | $ | — |
_______________________________________ (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)
Balance at December 31, 2020 | $ | 101 |  |  | $ | 3 |  |  |  |  |  |  | $ | 104 |  |  | $ | 57 |
Current period provision | 53 |  |  | 1 |  |  |  |  |  |  | 54 |  |  | 36 |
Write-offs charged against allowance | (126) |  |  | (1) |  |  |  |  |  |  | (127) |  |  | (77) |
Recoveries of amounts previously written off | 61 |  |  | — |  |  |  |  |  |  | 61 |  |  | 38 |
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 |
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,
| 2023 |  | 2022 |  | 2021
| (In millions)
DTE Energy | $ | 55 |  |  | $ | 55 |  |  | $ | 55 |
DTE Electric | $ | 38 |  |  | $ | 35 |  |  | $ | 36 |
Schedule of Finite-Lived Intangible Assets | The Registrants have certain Intangible assets as shown below:
|  |  | December 31, 2023 |  | December 31, 2022
| 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 |  |  | $ | (103) |  |  | $ | 143 |  |  | $ | 246 |  |  | $ | (88) |  |  | $ | 158 |
Carbon offsets |  |  | 10 |  |  | — |  |  | 10 |  |  | 6 |  |  | — |  |  | 6 |
Renewable energy credits |  |  | 2 |  |  | — |  |  | 2 |  |  | 2 |  |  | — |  |  | 2 |
Other |  |  | 1 |  |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |
Intangible assets not subject to amortization(a) |  | 13 |  |  | — |  |  | 13 |  |  | 8 |  |  | — |  |  | 8 |
DTE Energy Long-term intangible assets |  | $ | 259 |  |  | $ | (103) |  |  | $ | 156 |  |  | $ | 254 |  |  | $ | (88) |  |  | $ | 166 |
______________________________________ (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, 2023 |  | December 31, 2022
| 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 |  |  | $ | (103) |  |  | $ | 143 |  |  | $ | 246 |  |  | $ | (88) |  |  | $ | 158 |
Carbon offsets |  |  | 10 |  |  | — |  |  | 10 |  |  | 6 |  |  | — |  |  | 6 |
Renewable energy credits |  |  | 2 |  |  | — |  |  | 2 |  |  | 2 |  |  | — |  |  | 2 |
Other |  |  | 1 |  |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |
Intangible assets not subject to amortization(a) |  | 13 |  |  | — |  |  | 13 |  |  | 8 |  |  | — |  |  | 8 |
DTE Energy Long-term intangible assets |  | $ | 259 |  |  | $ | (103) |  |  | $ | 156 |  |  | $ | 254 |  |  | $ | (88) |  |  | $ | 166 |
______________________________________ (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 2028:
| 2024 |  | 2025 |  | 2026 |  | 2027 |  | 2028
| (In millions)
Estimated amortization expense | $ | 16 |  |  | $ | 16 |  |  | $ | 14 |  |  | $ | 14 |  |  | $ | 14 |
Schedule of Capitalized Cloud Computing Costs | The following balances for cloud computing costs relate to DTE Energy:
| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
| (In millions)
Amortization expense of capitalized cloud computing costs | $ | 10 |  |  | $ | 4 |  |  | $ | 1 |
Gross value of capitalized cloud computing costs | $ | 56 |  |  | $ | 42 |  |  |
Accumulated amortization of capitalized cloud computing costs | $ | 15 |  |  | $ | 5 |  |  |
The following balances for cloud computing costs relate to DTE Electric:
| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
| (In millions)
Amortization expense of capitalized cloud computing costs | $ | 8 |  |  | $ | 3 |  |  | $ | 1 |
Gross value of capitalized cloud computing costs | $ | 44 |  |  | $ | 33 |  |  |
Accumulated amortization of capitalized cloud computing costs | $ | 12 |  |  | $ | 4 |  |  |
Schedule of Accounting Policies | See the following notes for other accounting policies impacting the Registrants’ Consolidated Financial Statements:
Note |  | Title
5 |  | Revenue
6 |  | Property, Plant, and Equipment
8 |  | Asset Retirement Obligations
9 |  | Regulatory Matters
10 |  | Income Taxes
12 |  | Fair Value
13 |  | Financial and Other Derivative Instruments
17 |  | Leases
20 |  | Retirement Benefits and Trusteed Assets
21 |  | Stock-Based Compensation
22 |  | Segment and Related Information
23 |  | Related Party Transactions

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