Significant Accounting Policies (Effective Income Tax Rate Reconciliation) (Details) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Schedule of Income Taxes [Line Items] | ||||
| Statutory federal income tax rate | 21.00% | 21.00% | 21.00% | 21.00% |
| Increase (decrease) due to: | ||||
| State and local income taxes, net of federal benefit | 3.90% | 4.20% | 5.10% | 4.20% |
| Investment tax credits | (20.90%) | (13.70%) | (27.20%) | (13.20%) |
| Production tax credits | (13.80%) | (10.20%) | (17.10%) | (10.40%) |
| TCJA regulatory liability amortization | (4.80%) | (4.80%) | (5.90%) | (4.60%) |
| AFUDC equity | (2.10%) | (2.00%) | (2.90%) | (1.60%) |
| Nondeductible EES Coke penalty | 0.00% | 0.00% | 4.30% | 0.00% |
| Enactment of Illinois income tax legislation, net of federal benefit | 0.00% | 5.90% | 0.00% | 2.10% |
| Other | (0.30%) | 0.00% | (0.30%) | (0.10%) |
| Effective Tax Rate | (17.00%) | 0.40% | (23.00%) | (2.60%) |
| DTE Electric | ||||
| Schedule of Income Taxes [Line Items] | ||||
| Statutory federal income tax rate | 21.00% | 21.00% | 21.00% | 21.00% |
| Increase (decrease) due to: | ||||
| State and local income taxes, net of federal benefit | 5.40% | 5.60% | 5.50% | 5.60% |
| Investment tax credits | (18.60%) | (16.30%) | (19.90%) | (16.20%) |
| Production tax credits | (6.10%) | (6.60%) | (6.20%) | (6.80%) |
| TCJA regulatory liability amortization | (4.00%) | (4.70%) | (4.10%) | (4.60%) |
| AFUDC equity | (2.20%) | (2.10%) | (2.40%) | (2.00%) |
| Other | (0.20%) | (0.30%) | (0.30%) | (0.30%) |
| Effective Tax Rate | (4.70%) | (3.40%) | (6.40%) | (3.30%) |
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- Definition Effective Income Tax Rate Reconciliation, Allowance For Funds Used During Construction, Capitalized Cost of Equity, Percent No definition available.
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- Definition Effective Income Tax Rate Reconciliation, Change in Tax Legislation, Percent No definition available.
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- Definition Effective Income Tax Rate Reconciliation, Increase (Decrease), Percent No definition available.
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- Definition Effective Income Tax Rate Reconciliation, Nondeductible Expense, Penalty, Percent No definition available.
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- Definition Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017, Amortization of Regulatory Liability, Percent No definition available.
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- Definition [Line Items] for Schedule of Income Taxes [Table] No definition available.
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Percentage of reported income tax benefit (expense) from difference to income tax expense (benefit) computed by applying statutory federal (national) income tax rate to pretax income (loss) from continuing operation, attributable to other reconciling items. Excludes state and local income tax expense (benefit), federal tax expense (benefit), statutory income tax expense (benefit) outside of country of domicile, tax credit, nondeductible expense, deduction, income tax settlement, income tax contingency, and cross-border tax law. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to investment tax credit. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other tax credits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Details
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