Revenue (Disaggregation of Revenue by Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 12,745	$ 19,228	$ 14,964
Operating Segments | Electric
Disaggregation of Revenue [Line Items]
Revenues	5,818	6,412	5,821
Operating Segments | Electric | Residential
Disaggregation of Revenue [Line Items]
Revenues	2,847	2,911	2,926
Operating Segments | Electric | Commercial
Disaggregation of Revenue [Line Items]
Revenues	2,114	1,958	1,908
Operating Segments | Electric | Industrial
Disaggregation of Revenue [Line Items]
Revenues	732	659	628
Operating Segments | Electric | Other
Disaggregation of Revenue [Line Items]
Revenues	125	884	359
Operating Segments | Electric | Other | DTE Sustainable Generation
Disaggregation of Revenue [Line Items]
Revenues	14	15	12
Operating Segments | Gas
Disaggregation of Revenue [Line Items]
Revenues	1,748	1,924	1,553
Operating Segments | Gas | Gas sales
Disaggregation of Revenue [Line Items]
Revenues	1,324	1,442	1,058
Operating Segments | Gas | End User Transportation
Disaggregation of Revenue [Line Items]
Revenues	250	264	233
Operating Segments | Gas | Intermediate Transportation
Disaggregation of Revenue [Line Items]
Revenues	85	81	82
Operating Segments | Gas | Other
Disaggregation of Revenue [Line Items]
Revenues	89	137	180
Operating Segments | DTE Vantage
Disaggregation of Revenue [Line Items]
Revenues	809	848	1,482
Operating Segments | Energy Trading
Disaggregation of Revenue [Line Items]
Revenues	$ 4,612	$ 10,308	$ 6,831