Revenue (Disaggregation of Revenue By Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 15,814	$ 12,457	$ 12,745
Operating Segments | Electric
Disaggregation of Revenue [Line Items]
Revenues	6,935	6,293	5,818
Operating Segments | Electric | Residential
Disaggregation of Revenue [Line Items]
Revenues	3,144	3,045	2,847
Operating Segments | Electric | Commercial
Disaggregation of Revenue [Line Items]
Revenues	2,195	2,263	2,114
Operating Segments | Electric | Industrial
Disaggregation of Revenue [Line Items]
Revenues	652	715	732
Operating Segments | Electric | Other
Disaggregation of Revenue [Line Items]
Revenues	944	270	125
Operating Segments | Electric | Other | DTE Sustainable Generation
Disaggregation of Revenue [Line Items]
Revenues	50	16	14
Operating Segments | Gas
Disaggregation of Revenue [Line Items]
Revenues	2,052	1,798	1,748
Operating Segments | Gas | Other
Disaggregation of Revenue [Line Items]
Revenues	189	162	89
Operating Segments | Gas | Gas sales
Disaggregation of Revenue [Line Items]
Revenues	1,521	1,307	1,324
Operating Segments | Gas | End User Transportation
Disaggregation of Revenue [Line Items]
Revenues	255	246	250
Operating Segments | Gas | Intermediate Transportation
Disaggregation of Revenue [Line Items]
Revenues	87	83	85
Operating Segments | DTE Vantage
Disaggregation of Revenue [Line Items]
Revenues	696	753	809
Operating Segments | Energy Trading segment
Disaggregation of Revenue [Line Items]
Revenues	$ 6,477	$ 3,843	$ 4,612