Segment and Related Information (Financial Data - Inter-segment Billing) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Operating Revenues	$ (4,924)	$ (3,021)	$ (9,501)	$ (6,602)
Electric
Segment Reporting Information [Line Items]
Operating Revenues	(1,570)	(1,411)	(3,060)	(2,775)
Gas
Segment Reporting Information [Line Items]
Operating Revenues	(362)	(265)	(1,128)	(877)
DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues	(220)	(394)	(399)	(760)
Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues	(2,832)	(1,167)	(5,035)	(2,606)
Reconciliation and Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	60	207	121	403
Reconciliation and Eliminations | Electric
Segment Reporting Information [Line Items]
Operating Revenues	18	15	34	31
Reconciliation and Eliminations | Gas
Segment Reporting Information [Line Items]
Operating Revenues	3	3	6	7
Reconciliation and Eliminations | DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues	17	176	42	338
Reconciliation and Eliminations | Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues	22	13	39	26
Reconciliation and Eliminations | Corporate and Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 0	$ 0	$ 0	$ 1