XML 54 R35.htm IDEA: XBRL DOCUMENT
v3.25.3

Significant Accounting Policies (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2025
Accounting Policies [Abstract] |
Schedule of Other Income | The following is a summary of DTE Energy's Other income:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
| (In millions)
Allowance for equity funds used during construction | $ | 26 |  |  | $ | 24 |  |  | $ | 72 |  |  | $ | 62 |
Contract services | 11 |  |  | 8 |  |  | 31 |  |  | 21 |
Equity earnings of equity method investees | 5 |  |  | 12 |  |  | 16 |  |  | 36 |
Investment income(a) | 8 |  |  | 7 |  |  | 16 |  |  | 16 |
Other | 4 |  |  | 3 |  |  | 12 |  |  | 11 |
| $ | 54 |  |  | $ | 54 |  |  | $ | 147 |  |  | $ | 146 |
_______________________________________ (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 September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
| (In millions)
Allowance for equity funds used during construction | $ | 25 |  |  | $ | 23 |  |  | $ | 71 |  |  | $ | 60 |
Contract services | 11 |  |  | 8 |  |  | 31 |  |  | 21 |
Investment income(a) | 5 |  |  | 6 |  |  | 12 |  |  | 13 |
Other | 4 |  |  | 4 |  |  | 9 |  |  | 11 |
| $ | 45 |  |  | $ | 41 |  |  | $ | 123 |  |  | $ | 105 |
_______________________________________ (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 September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
DTE Energy |  |  |  |  |  |  |
Statutory federal income tax rate | 21.0 | % |  | 21.0 | % |  | 21.0 | % |  | 21.0 | %
Increase (decrease) due to: |  |  |  |  |  |  |
State and local income taxes, net of federal benefit | 4.2 |  |  | 5.0 |  |  | 4.2 |  |  | 4.3 |
Investment tax credits | (13.2) |  |  | (34.2) |  |  | (13.5) |  |  | (13.6) |
Production tax credits | (10.8) |  |  | (17.2) |  |  | (10.6) |  |  | (10.9) |
TCJA regulatory liability amortization | (4.7) |  |  | (6.2) |  |  | (4.6) |  |  | (5.1) |
AFUDC equity | (1.4) |  |  | (1.6) |  |  | (1.5) |  |  | (1.3) |
Enactment of Illinois income tax legislation, net of federal benefit | — |  |  | — |  |  | 1.3 |  |  | — |
Valuation allowance due to enactment of federal income tax legislation | 4.0 |  |  | — |  |  | 1.6 |  |  | — |
Other | (0.4) |  |  | (0.6) |  |  | — |  |  | (0.5) |
Effective income tax rate | (1.3) | % |  | (33.8) | % |  | (2.1) | % |  | (6.1) | %
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
DTE Electric |  |  |  |  |  |  |
Statutory federal income tax rate | 21.0 | % |  | 21.0 | % |  | 21.0 | % |  | 21.0 | %
Increase (decrease) due to: |  |  |  |  |  |  |
State and local income taxes, net of federal benefit | 5.6 |  |  | 6.2 |  |  | 5.6 |  |  | 5.7 |
Investment tax credits | (15.6) |  |  | (28.7) |  |  | (15.9) |  |  | (11.7) |
Production tax credits | (6.6) |  |  | (19.3) |  |  | (6.7) |  |  | (13.1) |
TCJA regulatory liability amortization | (4.6) |  |  | (6.4) |  |  | (4.6) |  |  | (5.3) |
AFUDC equity | (1.8) |  |  | (1.9) |  |  | (1.9) |  |  | (1.6) |
Other | (0.8) |  |  | (0.5) |  |  | (0.5) |  |  | (0.3) |
Effective income tax rate | (2.8) | % |  | (29.6) | % |  | (3.0) | % |  | (5.3) | %
Schedule of Financing Receivables Classified by Internal Grade of Credit Risk | The following represents the Registrants' financing receivables by year of origination as determined by the date the original agreement was executed, 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 September 30, 2025.
| DTE Energy |  | DTE Electric(a)
| Year of Origination
| 2025 |  | 2024 |  | 2023 and Prior |  | Total |  | 2025 and Prior
| (In millions)
Notes receivable |  |  |  |  |  |  |  |  |
Internal grade 1 | $ | 131 |  |  | $ | 4 |  |  | $ | 27 |  |  | $ | 162 |  |  | $ | 158 |
Internal grade 2 | 2 |  |  | 853 |  |  | 253 |  |  | 1,108 |  |  | — |
Total notes receivable(b) | $ | 133 |  |  | $ | 857 |  |  | $ | 280 |  |  | $ | 1,270 |  |  | $ | 158 |
Net investment in leases |  |  |  |  |  |  |  |  |
Internal grade 1 | $ | — |  |  | $ | — |  |  | $ | 35 |  |  | $ | 35 |  |  | $ | — |
Internal grade 2 | — |  |  | 2 |  |  | — |  |  | 2 |  |  | — |
Total net investment in leases(b) | $ | — |  |  | $ | 2 |  |  | $ | 35 |  |  | $ | 37 |  |  | $ | — |
_______________________________________ (a)For DTE Electric, $131 million is included in Internal grade 1 with a 2025 year of origination. (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(a) |  |  |  |  |  | Total |  | Trade and other accounts receivable
| (In millions)
Beginning reserve balance, January 1, 2025 | $ | 69 |  |  | $ | 3 |  |  |  |  |  |  | $ | 72 |  |  | $ | 46 |
Current period provision | 59 |  |  | — |  |  |  |  |  |  | 59 |  |  | 36 |
Write-offs charged against allowance | (85) |  |  | — |  |  |  |  |  |  | (85) |  |  | (55) |
Recoveries of amounts previously written off | 28 |  |  | — |  |  |  |  |  |  | 28 |  |  | 19 |
Ending reserve balance, September 30, 2025 | $ | 71 |  |  | $ | 3 |  |  |  |  |  |  | $ | 74 |  |  | $ | 46 |
_______________________________________ (a)Other receivables includes reserves on notes receivable and Accounts receivable — Other.
| DTE Energy |  | DTE Electric
| Trade accounts receivable |  | Other receivables(a) |  |  |  |  |  | Total |  | Trade and other accounts receivable
| (In millions)
Beginning reserve balance, January 1, 2024 | $ | 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 |
Ending reserve balance, December 31, 2024 | $ | 69 |  |  | $ | 3 |  |  |  |  |  |  | $ | 72 |  |  | $ | 46 |
_______________________________________ (a)Other receivables includes reserves on notes receivable and Accounts receivable — Other.
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 September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
| (In millions)
DTE Energy | $ | 14 |  |  | $ | 27 |  |  | $ | 60 |  |  | $ | 65 |
DTE Electric | $ | 13 |  |  | $ | 22 |  |  | $ | 36 |  |  | $ | 43 |

X
- Definition Financing Receivable, Uncollectible Expense + References No definition available. + Details
Name: | dte_FinancingReceivableUncollectibleExpenseTableTextBlock
Namespace Prefix: | dte_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of allowance for credit loss on financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
Name: | us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-5 + Details
Name: | us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 + Details
Name: | us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the detailed components of other nonoperating income. May include methodology, assumptions and amounts for: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_ScheduleOfOtherNonoperatingIncomeByComponentTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration