Revenue (Disaggregation of Revenue By Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 4,577	$ 3,581
Electric
Disaggregation of Revenue [Line Items]
Revenues	1,490	1,364
Electric | Residential
Disaggregation of Revenue [Line Items]
Revenues	700	672
Electric | Commercial
Disaggregation of Revenue [Line Items]
Revenues	477	451
Electric | Industrial
Disaggregation of Revenue [Line Items]
Revenues	161	159
Electric | Other
Disaggregation of Revenue [Line Items]
Revenues	152	82
Electric | Other | DTE Sustainable Generation
Disaggregation of Revenue [Line Items]
Revenues	4	4
Gas
Disaggregation of Revenue [Line Items]
Revenues	766	612
Gas | Other
Disaggregation of Revenue [Line Items]
Revenues	43	40
Gas | Gas sales
Disaggregation of Revenue [Line Items]
Revenues	596	461
Gas | End User Transportation
Disaggregation of Revenue [Line Items]
Revenues	98	85
Gas | Intermediate Transportation
Disaggregation of Revenue [Line Items]
Revenues	29	26
DTE Vantage
Disaggregation of Revenue [Line Items]
Revenues	179	366
Energy Trading
Disaggregation of Revenue [Line Items]
Revenues	$ 2,203	$ 1,439