XML 102 R85.htm IDEA: XBRL DOCUMENT
v3.23.2

Retirement Benefits and Trusteed Assets (Details Textuals) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2023 | Jun. 30, 2023 | Jun. 30, 2022
Pension plans |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Pension cost (credit) | $ (14,000,000) | $ 7,000,000 |  | $ (31,000,000) | $ 14,000,000
Pension plans | Qualified Plan |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Anticipated contributions, current fiscal year | 0 |  |  | 0 |
Postretirement benefit plans |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Pension cost (credit) | (10,000,000) | (16,000,000) |  | (19,000,000) | (33,000,000)
Anticipated contributions, current fiscal year | 0 |  |  | 0 |
DTE Electric | Pension plans |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Pension cost (credit) | (7,000,000) | 9,000,000 |  | (16,000,000) | 18,000,000
DTE Electric | Pension plans | Qualified Plan | Maximum | Forecast |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Pension funds transferred to (from) plan |  |  | $ 50,000,000 |  |
DTE Electric | Postretirement benefit plans |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Pension cost (credit) | $ (6,000,000) | $ (9,000,000) |  | $ (12,000,000) | $ (18,000,000)
DTE Gas | Pension plans | Qualified Plan | Maximum | Forecast |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Pension funds transferred to (from) plan |  |  | $ (50,000,000) |  |

X
- Definition Amount of increase (decrease) in plan assets of defined benefit plan from assets transferred into (from) plan. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanAssetsTransferredToFromPlan
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contributions received and expected to be received by defined benefit plan from employer in current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-18 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-6 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-18 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-6 + Details
Name: | us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTaxStatusAxis=us-gaap_QualifiedPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=dte_DTEElectricMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=dte_DTEGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |