Retirement Benefits and Trusteed Assets (Details Textuals) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pension plans
Defined Benefit Plan Disclosure [Line Items]
Pension credit	$ 5,000,000	$ 17,000,000
Anticipated contributions, current fiscal year	0
Postretirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Pension credit	11,000,000	9,000,000
Anticipated contributions, current fiscal year	0
DTE Electric | Pension plans
Defined Benefit Plan Disclosure [Line Items]
Pension credit	1,000,000	9,000,000
DTE Electric | Postretirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Pension credit	$ 6,000,000	$ 6,000,000