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)