Revenue (Disaggregation of Revenue by Segment) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 4,647	$ 3,715	$ 3,021	$ 3,581	$ 3,080	$ 3,080	$ 2,411	$ 2,852	$ 14,964	$ 11,423	$ 12,168
Electric
Disaggregation of Revenue [Line Items]
Revenues									5,821	5,520	5,229
Electric | Residential
Disaggregation of Revenue [Line Items]
Revenues									2,926	2,825	2,427
Electric | Commercial
Disaggregation of Revenue [Line Items]
Revenues									1,908	1,739	1,795
Electric | Industrial
Disaggregation of Revenue [Line Items]
Revenues									628	592	659
Electric | Other
Disaggregation of Revenue [Line Items]
Revenues									359	364	348
Electric | Other | DTE Sustainable Generation
Disaggregation of Revenue [Line Items]
Revenues									12	14	5
Gas
Disaggregation of Revenue [Line Items]
Revenues									1,553	1,414	1,482
Gas | Other
Disaggregation of Revenue [Line Items]
Revenues									180	146	142
Gas | Gas sales
Disaggregation of Revenue [Line Items]
Revenues									1,058	971	1,043
Gas | End User Transportation
Disaggregation of Revenue [Line Items]
Revenues									233	218	219
Gas | Intermediate Transportation
Disaggregation of Revenue [Line Items]
Revenues									82	79	78
DTE Vantage
Disaggregation of Revenue [Line Items]
Revenues									1,482	1,224	1,560
Energy Trading
Disaggregation of Revenue [Line Items]
Revenues									$ 6,831	$ 3,863	$ 4,610