Segment and Related Information (Financial Data - Inter-segment Billing) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Operating Revenues	$ (4,440)	$ (3,240)
Non-utility operations	2,133	1,084
Reconciliation and Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	109	58
Non-utility operations	(86)	(37)
Reconciliation and Eliminations | Electric segment(a)
Segment Reporting Information [Line Items]
Operating Revenues	19	18
Reconciliation and Eliminations | Gas segment
Segment Reporting Information [Line Items]
Operating Revenues	4	4
Reconciliation and Eliminations | DTE Vantage segment
Segment Reporting Information [Line Items]
Operating Revenues	40	11
Reconciliation and Eliminations | Energy Trading segment
Segment Reporting Information [Line Items]
Operating Revenues	$ 46	$ 25