Revenue (Disaggregation of Revenue By Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenues	$ 3,779	$ 4,577
Electric
Disaggregation of Revenue [Line Items]
Revenues	1,379	1,490
Electric | Residential
Disaggregation of Revenue [Line Items]
Revenues	654	700
Electric | Commercial
Disaggregation of Revenue [Line Items]
Revenues	495	477
Electric | Industrial
Disaggregation of Revenue [Line Items]
Revenues	169	161
Electric | Other
Disaggregation of Revenue [Line Items]
Revenues	61	152
Electric | Other | DTE Sustainable Generation
Disaggregation of Revenue [Line Items]
Revenues	4	4
Gas
Disaggregation of Revenue [Line Items]
Revenues	707	766
Gas | Other
Disaggregation of Revenue [Line Items]
Revenues	(11)	43
Gas | Gas sales
Disaggregation of Revenue [Line Items]
Revenues	601	596
Gas | End User Transportation
Disaggregation of Revenue [Line Items]
Revenues	86	98
Gas | Intermediate Transportation
Disaggregation of Revenue [Line Items]
Revenues	31	29
DTE Vantage
Disaggregation of Revenue [Line Items]
Revenues	184	179
Energy Trading
Disaggregation of Revenue [Line Items]
Revenues	$ 1,568	$ 2,203