Revenue (Revenues Outside the Scope of Topic 606) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Leases	$ 19	$ 19	$ 45	$ 44
Operating segments | Electric
Disaggregation of Revenue [Line Items]
Other revenues	11	8	20	18
Operating segments | Gas
Disaggregation of Revenue [Line Items]
Other revenues	3	2	9	7
Alternative Revenue Program	1	0	9	4
Operating segments | DTE Vantage
Disaggregation of Revenue [Line Items]
Leases	19	19	45	44
Operating segments | Energy Trading
Disaggregation of Revenue [Line Items]
Derivatives	$ 536	$ 670	$ 1,781	$ 2,527