Amount of contribution received by defined benefit plan from employer which increases plan assets.

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+ Details

- 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.

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+ Details

Retirement Benefits and Trusteed Assets (Details Textuals) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Pension plans
Defined Benefit Plan Disclosure [Line Items]
Pension cost (credit)	$ 17	$ 16	$ 35	$ 31
Contributions by employer			0
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Pension cost (credit)	(11)	(10)	(22)	(20)
Contributions by employer			0
DTE Electric \| Pension plans
Defined Benefit Plan Disclosure [Line Items]
Pension cost (credit)	15	13	30	27
Pension funds transferred to (from) plan (up to)			25		$ 25
DTE Electric \| Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Pension cost (credit)	$ (6)	$ (5)	(13)	$ (10)
DTE Gas \| Pension plans
Defined Benefit Plan Disclosure [Line Items]
Pension funds transferred to (from) plan (up to)			$ (25)		$ (25)