Segment and Related Information (Financial Data - Operating Revenues including Inter-segment Revenues) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Utility operations	$ 1,827	$ 2,053	$ 5,504	$ 6,196
Operating Revenues — Non-utility operations	1,061	3,198	3,847	8,556
Operating Revenues	2,888	5,251	9,351	14,752
Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	(57)	(77)	(165)	(198)
Operating Revenues	(57)	(77)	(165)	(198)
Electric | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Utility operations	1,623	1,844	4,324	4,896
Operating Revenues — Non-utility operations	3	3	10	11
Operating Revenues	1,626	1,847	4,334	4,907
Electric | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(20)	(19)	(55)	(53)
Gas | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Utility operations	227	230	1,245	1,358
Operating Revenues	227	230	1,245	1,358
Gas | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(4)	(4)	(13)	(10)
DTE Vantage | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	199	227	572	626
Operating Revenues	199	227	572	626
DTE Vantage | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(13)	(15)	(32)	(57)
Energy Trading | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	893	3,024	3,365	8,059
Operating Revenues	893	3,024	3,365	8,059
Energy Trading | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(20)	(39)	(65)	(78)
Corporate and Other | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	0	0	0	0
Corporate and Other | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	$ 0	$ 0	$ 0	$ 0