Revenue (Disaggregation of Revenue By Segment) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Revenues	$ 2,888	$ 5,251	$ 9,351	$ 14,752
Operating segments | Electric
Disaggregation of Revenue [Line Items]
Revenues	1,626	1,847	4,334	4,907
Operating segments | Electric | Residential
Disaggregation of Revenue [Line Items]
Revenues	861	882	2,173	2,273
Operating segments | Electric | Commercial
Disaggregation of Revenue [Line Items]
Revenues	585	541	1,604	1,505
Operating segments | Electric | Industrial
Disaggregation of Revenue [Line Items]
Revenues	190	167	545	498
Operating segments | Electric | Other
Disaggregation of Revenue [Line Items]
Revenues	(10)	257	12	631
Operating segments | Electric | Other | DTE Sustainable Generation
Disaggregation of Revenue [Line Items]
Revenues	3	3	10	11
Operating segments | Gas
Disaggregation of Revenue [Line Items]
Revenues	227	230	1,245	1,358
Operating segments | Gas | Gas sales
Disaggregation of Revenue [Line Items]
Revenues	119	128	936	955
Operating segments | Gas | End User Transportation
Disaggregation of Revenue [Line Items]
Revenues	44	42	184	195
Operating segments | Gas | Intermediate Transportation
Disaggregation of Revenue [Line Items]
Revenues	16	15	63	60
Operating segments | Gas | Other
Disaggregation of Revenue [Line Items]
Revenues	48	45	62	148
Operating segments | DTE Vantage
Disaggregation of Revenue [Line Items]
Revenues	199	227	572	626
Operating segments | Energy Trading
Disaggregation of Revenue [Line Items]
Revenues	$ 893	$ 3,024	$ 3,365	$ 8,059