Retirement Benefits and Trusteed Assets (OPEB - Contributions to the VEBA) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Contribution Plan Disclosure [Line Items]
Contributions	$ 75	$ 73	$ 70
DTE Electric
Defined Contribution Plan Disclosure [Line Items]
Contributions	35	35	34
Retiree healthcare plan (VEBA)
Defined Contribution Plan Disclosure [Line Items]
Contributions	16	16	18
Retiree healthcare plan (VEBA) | DTE Electric
Defined Contribution Plan Disclosure [Line Items]
Contributions	$ 7	$ 7	$ 8