Revenue (Revenues Outside the Scope of Topic 606) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Leases	$ 19	$ 32	$ 39	$ 64
Electric
Disaggregation of Revenue [Line Items]
Other revenues	4	5	8	8
Gas
Disaggregation of Revenue [Line Items]
Other revenues	2	2	4	4
DTE Vantage
Disaggregation of Revenue [Line Items]
Leases	19	22	39	44
Energy Trading
Disaggregation of Revenue [Line Items]
Derivatives	$ 2,426	$ 907	$ 4,160	$ 2,053