Revenue (Revenues Outside the Scope of Topic 606) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Leases	$ 10	$ 19	$ 25	$ 39
Electric
Disaggregation of Revenue [Line Items]
Other revenues	5	4	10	8
Gas
Disaggregation of Revenue [Line Items]
Alternative Revenue Program	1	0	4	0
Other revenues	2	2	5	4
DTE Vantage
Disaggregation of Revenue [Line Items]
Leases	10	19	25	39
Energy Trading
Disaggregation of Revenue [Line Items]
Derivatives	$ 696	$ 2,426	$ 1,857	$ 4,160