Segment and Related Information (Financial Data - Operating Revenues including Inter-segment Revenues) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Utility operations	$ 1,909	$ 1,655	$ 4,143	$ 3,608
Operating Revenues — Non-utility operations	3,015	1,366	5,358	2,994
Operating Revenues	4,924	3,021	9,501	6,602
Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	(60)	(216)	(121)	(417)
Operating Revenues	(60)	(207)	(121)	(403)
Electric
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	1,570	1,411	3,060	2,775
Electric | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Utility operations	1,566	1,408	3,052	2,768
Operating Revenues — Non-utility operations	4	3	8	7
Electric | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(18)	(15)	(34)	(31)
Gas
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	362	265	1,128	877
Gas | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Utility operations	362	265	1,128	877
Gas | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(3)	(3)	(6)	(7)
DTE Vantage
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	220	394	399	760
DTE Vantage | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	220	394	399	760
DTE Vantage | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(17)	(176)	(42)	(338)
Energy Trading
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	2,832	1,167	5,035	2,606
Energy Trading | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	2,832	1,167	5,035	2,606
Energy Trading | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(22)	(13)	(39)	(26)
Corporate and Other | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	0	0	0	1
Corporate and Other | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	$ 0	0	$ 0	(1)
Gas Storage and Pipelines | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations		$ 9		$ 14