Segment and Related Information (Financial Data - Inter-segment Billing) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Operating Revenues	$ (2,684)	$ (4,924)	$ (6,463)	$ (9,501)
Electric
Segment Reporting Information [Line Items]
Operating Revenues	(1,329)	(1,570)	(2,708)	(3,060)
Gas
Segment Reporting Information [Line Items]
Operating Revenues	(311)	(362)	(1,018)	(1,128)
DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues	(189)	(220)	(373)	(399)
Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues	(904)	(2,832)	(2,472)	(5,035)
Reconciliation and Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	49	60	108	121
Reconciliation and Eliminations | Electric
Segment Reporting Information [Line Items]
Operating Revenues	18	18	35	34
Reconciliation and Eliminations | Gas
Segment Reporting Information [Line Items]
Operating Revenues	4	3	9	6
Reconciliation and Eliminations | DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues	9	17	19	42
Reconciliation and Eliminations | Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues	18	22	45	39
Reconciliation and Eliminations | Corporate and Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 0	$ 0	$ 0	$ 0