Segment and Related Information (Financial Data - Operating Revenues including Inter-segment Revenues) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Utility operations	$ 1,617	$ 1,909	$ 3,677	$ 4,143
Operating Revenues — Non-utility operations	1,067	3,015	2,786	5,358
Operating Revenues	2,684	4,924	6,463	9,501
Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	(49)	(60)	(108)	(121)
Operating Revenues	(49)	(60)	(108)	(121)
Electric
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	1,329	1,570	2,708	3,060
Electric | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Utility operations	1,326	1,566	2,701	3,052
Operating Revenues — Non-utility operations	3	4	7	8
Electric | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(18)	(18)	(35)	(34)
Gas
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	311	362	1,018	1,128
Gas | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Utility operations	311	362	1,018	1,128
Gas | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(4)	(3)	(9)	(6)
DTE Vantage
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	189	220	373	399
DTE Vantage | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	189	220	373	399
DTE Vantage | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(9)	(17)	(19)	(42)
Energy Trading
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	904	2,832	2,472	5,035
Energy Trading | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	904	2,832	2,472	5,035
Energy Trading | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(18)	(22)	(45)	(39)
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