Segment and Related Information (Financial Data - Net Income (Loss) Attributable to DTE Energy by Segment) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Income (Loss) attributable to DTE Energy — continuing operations	$ 387	$ 58	$ 818	$ 495
Net Income Attributable to DTE Energy Company — discontinued operations	0	(33)	0	106
Net Income Attributable to DTE Energy Company/DTE Electric Company	387	25	818	601
Electric
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Income (Loss) attributable to DTE Energy — continuing operations	363	342	750	788
Gas
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Income (Loss) attributable to DTE Energy — continuing operations	(23)	(30)	179	146
DTE Vantage
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Income (Loss) attributable to DTE Energy — continuing operations	26	73	68	115
Energy Trading
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Income (Loss) attributable to DTE Energy — continuing operations	56	(52)	(80)	(173)
Corporate and Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Income (Loss) attributable to DTE Energy — continuing operations	$ (35)	$ (275)	$ (99)	$ (381)