Revenue (Disaggregation of Revenue By Segment) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 2,906	$ 2,888	$ 9,021	$ 9,351
Operating segments | Electric
Disaggregation of Revenue [Line Items]
Revenues	1,697	1,626	4,783	4,334
Operating segments | Electric | Residential
Disaggregation of Revenue [Line Items]
Revenues	946	861	2,390	2,173
Operating segments | Electric | Commercial
Disaggregation of Revenue [Line Items]
Revenues	632	585	1,759	1,604
Operating segments | Electric | Industrial
Disaggregation of Revenue [Line Items]
Revenues	189	190	559	545
Operating segments | Electric | Other
Disaggregation of Revenue [Line Items]
Revenues	(70)	(10)	75	12
Operating segments | Electric | Other | DTE Sustainable Generation
Disaggregation of Revenue [Line Items]
Revenues	2	3	11	10
Operating segments | Gas
Disaggregation of Revenue [Line Items]
Revenues	230	227	1,230	1,245
Operating segments | Gas | Gas sales
Disaggregation of Revenue [Line Items]
Revenues	125	119	891	936
Operating segments | Gas | End User Transportation
Disaggregation of Revenue [Line Items]
Revenues	45	44	180	184
Operating segments | Gas | Intermediate Transportation
Disaggregation of Revenue [Line Items]
Revenues	15	16	60	63
Operating segments | Gas | Other
Disaggregation of Revenue [Line Items]
Revenues	45	48	99	62
Operating segments | DTE Vantage
Disaggregation of Revenue [Line Items]
Revenues	190	199	555	572
Operating segments | Energy Trading
Disaggregation of Revenue [Line Items]
Revenues	$ 840	$ 893	$ 2,610	$ 3,365