Property, Plant, and Equipment (Summary of Property by Classification) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	$ 37,083	$ 34,016
Accumulated depreciation and amortization	(10,139)	(9,517)
Net property, plant, and equipment	26,944	24,499
DTE Vantage
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	1,118	1,194
Accumulated depreciation and amortization	(545)	(619)
Other
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	208	217
Accumulated depreciation and amortization	(73)	(84)
DTE Electric
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	28,849	26,171
Accumulated depreciation and amortization	(7,676)	(7,050)
Net property, plant, and equipment	21,173	19,121
DTE Electric | Nuclear
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	3,394	3,295
Accumulated depreciation and amortization	(413)	(373)
DTE Electric | Renewables
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	2,522	1,817
Accumulated depreciation and amortization	(357)	(295)
DTE Electric | Fossil and other generation
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	8,640	8,031
Accumulated depreciation and amortization	(3,214)	(3,014)
DTE Electric | Distribution
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	11,414	10,354
Accumulated depreciation and amortization	(2,842)	(2,686)
DTE Electric | Other
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	2,879	2,674
Accumulated depreciation and amortization	(850)	(682)
DTE Gas
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	6,908	6,434
Accumulated depreciation and amortization	(1,845)	(1,764)
DTE Gas | Distribution
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	4,900	4,517
Accumulated depreciation and amortization	(1,265)	(1,215)
DTE Gas | Storage
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	593	576
Accumulated depreciation and amortization	(154)	(146)
DTE Gas | Transmission and other
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	1,415	1,341
Accumulated depreciation and amortization	$ (426)	$ (403)