Revenue (Revenues Outside the Scope of Topic 606) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Leases	$ 12	$ 15
Operating segments | Electric
Disaggregation of Revenue [Line Items]
Alternative Revenue Program	1	1
Other revenues	12	5
Operating segments | Gas segment
Disaggregation of Revenue [Line Items]
Other revenues	4	3
Operating segments | DTE Vantage segment
Disaggregation of Revenue [Line Items]
Leases	12	15
Operating segments | Energy Trading segment
Disaggregation of Revenue [Line Items]
Derivatives	$ 1,612	$ 1,499