Segment and Related Information (Financial Data - Inter-segment Billing) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Operating Revenues	$ (2,888)	$ (5,251)	$ (9,351)	$ (14,752)
Reconciliation and Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	57	77	165	198
Reconciliation and Eliminations | Electric
Segment Reporting Information [Line Items]
Operating Revenues	20	19	55	53
Reconciliation and Eliminations | Gas
Segment Reporting Information [Line Items]
Operating Revenues	4	4	13	10
Reconciliation and Eliminations | DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues	13	15	32	57
Reconciliation and Eliminations | Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues	20	39	65	78
Reconciliation and Eliminations | Corporate and Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 0	$ 0	$ 0	$ 0