Revenue (Disaggregation of Revenue By Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Revenues	$ 4,440	$ 3,240
Operating segments | Electric segment(a)
Disaggregation of Revenue [Line Items]
Revenues	1,459	1,470
Operating segments | Electric segment(a) | Residential
Disaggregation of Revenue [Line Items]
Revenues	720	700
Operating segments | Electric segment(a) | Commercial
Disaggregation of Revenue [Line Items]
Revenues	529	556
Operating segments | Electric segment(a) | Industrial
Disaggregation of Revenue [Line Items]
Revenues	160	183
Operating segments | Electric segment(a) | Other
Disaggregation of Revenue [Line Items]
Revenues	50	31
Operating segments | Electric segment(a) | Other | DTE Sustainable Generation
Disaggregation of Revenue [Line Items]
Revenues	5	4
Operating segments | Gas
Disaggregation of Revenue [Line Items]
Revenues	876	711
Operating segments | Gas | Gas sales
Disaggregation of Revenue [Line Items]
Revenues	692	565
Operating segments | Gas | End User Transportation
Disaggregation of Revenue [Line Items]
Revenues	91	82
Operating segments | Gas | Intermediate Transportation
Disaggregation of Revenue [Line Items]
Revenues	31	29
Operating segments | Gas | Other
Disaggregation of Revenue [Line Items]
Revenues	62	35
Operating segments | DTE Vantage segment
Disaggregation of Revenue [Line Items]
Revenues	188	184
Operating segments | Energy Trading segment
Disaggregation of Revenue [Line Items]
Revenues	$ 2,026	$ 933