Revenue (Revenues Outside the Scope of Topic 606) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Leases	$ 14	$ 15
Operating segments | Electric
Disaggregation of Revenue [Line Items]
Other revenues	4	5
Operating segments | Gas
Disaggregation of Revenue [Line Items]
Other revenues	2	3
Alternative Revenue Program	6	3
Operating segments | DTE Vantage
Disaggregation of Revenue [Line Items]
Leases	14	15
Operating segments | Energy Trading
Disaggregation of Revenue [Line Items]
Derivatives	$ 659	$ 1,161