Segment and Related Information (Financial Data - Inter-segment Billing) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Operating Revenues	$ (3,779)	$ (4,577)
Electric
Segment Reporting Information [Line Items]
Operating Revenues	(1,379)	(1,490)
Gas
Segment Reporting Information [Line Items]
Operating Revenues	(707)	(766)
DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues	(184)	(179)
Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues	(1,568)	(2,203)
Reconciliation and Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	59	61
Reconciliation and Eliminations | Electric
Segment Reporting Information [Line Items]
Operating Revenues	17	16
Reconciliation and Eliminations | Gas
Segment Reporting Information [Line Items]
Operating Revenues	5	3
Reconciliation and Eliminations | DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues	10	25
Reconciliation and Eliminations | Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues	27	17
Reconciliation and Eliminations | Corporate and Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 0	$ 0