Segment and Related Information (Inter-Segment Billing) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Operating Revenues	$ (4,647)	$ (3,715)	$ (3,021)	$ (3,581)	$ (3,080)	$ (3,080)	$ (2,411)	$ (2,852)	$ (14,964)	$ (11,423)	$ (12,168)
Operating Revenues — Non-utility operations									(7,676)	(4,578)	(5,530)
Electric
Segment Reporting Information [Line Items]
Operating Revenues									(5,821)	(5,520)	(5,229)
Gas
Segment Reporting Information [Line Items]
Operating Revenues									(1,553)	(1,414)	(1,482)
DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues									(1,482)	(1,224)	(1,560)
Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues									(6,831)	(3,863)	(4,610)
Reclassifications and Eliminations
Segment Reporting Information [Line Items]
Operating Revenues									711	574	688
Reclassifications and Eliminations | Electric
Segment Reporting Information [Line Items]
Operating Revenues									64	61	56
Operating Revenues — Non-utility operations									4	2
Reclassifications and Eliminations | Gas
Segment Reporting Information [Line Items]
Operating Revenues									14	16	12
Reclassifications and Eliminations | DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues									575	464	596
Reclassifications and Eliminations | Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues									56	31	22
Reclassifications and Eliminations | Corporate and Other
Segment Reporting Information [Line Items]
Operating Revenues									$ 2	$ 2	$ 2