Revenue (Disaggregation of Revenue By Segment) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Revenues	$ 2,684	$ 4,924	$ 6,463	$ 9,501
Electric
Disaggregation of Revenue [Line Items]
Revenues	1,329	1,570	2,708	3,060
Electric | Residential
Disaggregation of Revenue [Line Items]
Revenues	658	691	1,312	1,391
Electric | Commercial
Disaggregation of Revenue [Line Items]
Revenues	524	487	1,019	964
Electric | Industrial
Disaggregation of Revenue [Line Items]
Revenues	186	170	355	331
Electric | Other
Disaggregation of Revenue [Line Items]
Revenues	(39)	222	22	374
Electric | Other | DTE Sustainable Generation
Disaggregation of Revenue [Line Items]
Revenues	3	4	7	8
Gas
Disaggregation of Revenue [Line Items]
Revenues	311	362	1,018	1,128
Gas | Other
Disaggregation of Revenue [Line Items]
Revenues	25	60	14	103
Gas | Gas sales
Disaggregation of Revenue [Line Items]
Revenues	216	231	817	827
Gas | End User Transportation
Disaggregation of Revenue [Line Items]
Revenues	54	55	140	153
Gas | Intermediate Transportation
Disaggregation of Revenue [Line Items]
Revenues	16	16	47	45
DTE Vantage
Disaggregation of Revenue [Line Items]
Revenues	189	220	373	399
Energy Trading
Disaggregation of Revenue [Line Items]
Revenues	$ 904	$ 2,832	$ 2,472	$ 5,035