Segment and Related Information (Financial Data - Inter-segment Billing) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Operating Revenues	$ (5,251)	$ (3,715)	$ (14,752)	$ (10,317)
Electric
Segment Reporting Information [Line Items]
Operating Revenues	(1,847)	(1,702)	(4,907)	(4,477)
Gas
Segment Reporting Information [Line Items]
Operating Revenues	(230)	(193)	(1,358)	(1,070)
DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues	(227)	(372)	(626)	(1,132)
Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues	(3,024)	(1,602)	(8,059)	(4,208)
Reconciliation and Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	77	155	198	558
Reconciliation and Eliminations | Electric
Segment Reporting Information [Line Items]
Operating Revenues	19	17	53	48
Reconciliation and Eliminations | Gas
Segment Reporting Information [Line Items]
Operating Revenues	4	3	10	10
Reconciliation and Eliminations | DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues	15	125	57	463
Reconciliation and Eliminations | Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues	39	9	78	35
Reconciliation and Eliminations | Corporate and Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 0	$ 1	$ 0	$ 2