Amount of net periodic benefit cost (credit) for defined benefit plan.

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
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-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
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-Topic 715
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-Section 50
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-6

Name:	us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Retirement Benefits and Trusteed Assets (Details Textuals) - Pension plans - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2025
Defined Benefit Plan Disclosure [Line Items]
Pension credit	$ (15)	$ 5
DTE Electric
Defined Benefit Plan Disclosure [Line Items]
Pension credit	$ 14	$ 1
DTE Electric \| Forecast
Defined Benefit Plan Disclosure [Line Items]
Pension funds transferred to (from) plan (up to)			$ 25
DTE Gas \| Forecast
Defined Benefit Plan Disclosure [Line Items]
Pension funds transferred to (from) plan (up to)			$ (25)