Revenue (Disaggregation of Revenue By Segment) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 2,875	$ 2,684	$ 6,115	$ 6,463
Operating segments | Electric
Disaggregation of Revenue [Line Items]
Revenues	1,616	1,329	3,086	2,708
Operating segments | Electric | Residential
Disaggregation of Revenue [Line Items]
Revenues	744	658	1,444	1,312
Operating segments | Electric | Commercial
Disaggregation of Revenue [Line Items]
Revenues	571	524	1,127	1,019
Operating segments | Electric | Industrial
Disaggregation of Revenue [Line Items]
Revenues	187	186	370	355
Operating segments | Electric | Other
Disaggregation of Revenue [Line Items]
Revenues	114	(39)	145	22
Operating segments | Electric | Other | DTE Sustainable Generation
Disaggregation of Revenue [Line Items]
Revenues	5	3	9	7
Operating segments | Gas
Disaggregation of Revenue [Line Items]
Revenues	289	311	1,000	1,018
Operating segments | Gas | Gas sales
Disaggregation of Revenue [Line Items]
Revenues	201	216	766	817
Operating segments | Gas | End User Transportation
Disaggregation of Revenue [Line Items]
Revenues	53	54	135	140
Operating segments | Gas | Intermediate Transportation
Disaggregation of Revenue [Line Items]
Revenues	16	16	45	47
Operating segments | Gas | Other
Disaggregation of Revenue [Line Items]
Revenues	19	25	54	14
Operating segments | DTE Vantage
Disaggregation of Revenue [Line Items]
Revenues	181	189	365	373
Operating segments | Energy Trading
Disaggregation of Revenue [Line Items]
Revenues	$ 837	$ 904	$ 1,770	$ 2,472