Segment and Related Information (Financial Data - Inter-segment Billing) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Operating Revenues	$ (3,240)	$ (3,779)
Reconciliation and Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	58	59
Reconciliation and Eliminations | Electric
Segment Reporting Information [Line Items]
Operating Revenues	18	17
Reconciliation and Eliminations | Gas
Segment Reporting Information [Line Items]
Operating Revenues	4	5
Reconciliation and Eliminations | DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues	11	10
Reconciliation and Eliminations | Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues	25	27
Reconciliation and Eliminations | Corporate and Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 0	$ 0