Segment and Related Information (Financial Data - Operating Revenues including Inter-segment Revenues) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Utility operations	$ 1,879	$ 1,617	$ 4,035	$ 3,677
Operating Revenues — Non-utility operations	996	1,067	2,080	2,786
Operating Revenues	2,875	2,684	6,115	6,463
Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	(48)	(49)	(106)	(108)
Operating Revenues	(48)	(49)	(106)	(108)
Electric | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Utility operations	1,611	1,326	3,077	2,701
Operating Revenues — Non-utility operations	5	3	9	7
Operating Revenues	1,616	1,329	3,086	2,708
Electric | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(18)	(18)	(36)	(35)
Gas | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Utility operations	289	311	1,000	1,018
Operating Revenues	289	311	1,000	1,018
Gas | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(3)	(4)	(7)	(9)
DTE Vantage | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	181	189	365	373
Operating Revenues	181	189	365	373
DTE Vantage | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(7)	(9)	(18)	(19)
Energy Trading | Operating segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues — Non-utility operations	837	904	1,770	2,472
Operating Revenues	837	904	1,770	2,472
Energy Trading | Reconciliation and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	(20)	(18)	(45)	(45)
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