Revenue (Revenues Outside the Scope of Topic 606) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Leases	$ 198	$ 181	$ 184
Electric
Disaggregation of Revenue [Line Items]
Alternative Revenue Program	36	26	22
Other revenues	19	22	19
Gas
Disaggregation of Revenue [Line Items]
Alternative Revenue Program	10	10	8
Other revenues	6	8	7
DTE Vantage
Disaggregation of Revenue [Line Items]
Leases	103	99	121
Energy Trading
Disaggregation of Revenue [Line Items]
Derivatives	$ 5,603	$ 2,690	$ 3,415