Segment and Related Information (Financial Data - Inter-segment Billing) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Operating Revenues	$ (4,577)	$ (3,581)
Electric
Segment Reporting Information [Line Items]
Operating Revenues	(1,490)	(1,364)
Gas
Segment Reporting Information [Line Items]
Operating Revenues	(766)	(612)
DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues	(179)	(366)
Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues	(2,203)	(1,439)
Reconciliation and Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	61	196
Reconciliation and Eliminations | Electric
Segment Reporting Information [Line Items]
Operating Revenues	16	16
Reconciliation and Eliminations | Gas
Segment Reporting Information [Line Items]
Operating Revenues	3	4
Reconciliation and Eliminations | DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues	25	162
Reconciliation and Eliminations | Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues	17	13
Reconciliation and Eliminations | Corporate and Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 0	$ 1