Property, Plant, and Equipment (Summary of Property by Classification) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	$ 30,029	$ 28,121
Accumulated depreciation and amortization	(10,299)	(10,087)
Net property, plant, and equipment	19,730	18,034
Non-utility and other
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	3,125	2,263
Accumulated depreciation and amortization	(858)	(761)
DTE Electric
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	22,094	21,391
Accumulated depreciation and amortization	(7,721)	(7,646)
Net property, plant, and equipment	14,373	13,745
DTE Electric | Generation
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	11,990	11,767
Accumulated depreciation and amortization	(4,364)	(4,346)
DTE Electric | Distribution
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	8,134	7,816
Accumulated depreciation and amortization	(2,769)	(2,707)
DTE Electric | Other
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	1,970	1,808
Accumulated depreciation and amortization	(588)	(593)
DTE Gas
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	4,810	4,467
Accumulated depreciation and amortization	(1,720)	(1,680)
DTE Gas | Distribution
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	3,382	3,124
Accumulated depreciation and amortization	(1,198)	(1,163)
DTE Gas | Storage
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	503	453
Accumulated depreciation and amortization	(152)	(147)
DTE Gas | Transmission and other
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	925	890
Accumulated depreciation and amortization	$ (370)	$ (370)