Commitments and Contingencies (Details Textuals) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020 USD ($) employee NOV	Jun. 30, 2020 USD ($) employee NOV	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) employee site facility plant NOV	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Jul. 31, 2019 CAD ($)	Jul. 31, 2009 plant
Loss Contingencies [Line Items]
Estimated utility capital expenditures, expenditures for non-utility businesses, and contributions to equity method investees	$ 4,500	$ 4,500		$ 4,500
Certain non-qualified benefit plan trusts
Loss Contingencies [Line Items]
Pre-tax investment gains (losses)		$ 22	$ 7	$ (9)	$ 24
Power and Industrial Projects
Loss Contingencies [Line Items]
Number of generating plants operated with ownership interest held | plant				5
Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Number of employees | employee	5,200	5,200		5,200
Synthetic fuel
Loss Contingencies [Line Items]
Number of days after expiration of statutes of limitations				90 days
Maximum potential liability	$ 400	$ 400		$ 400
Reduced emissions fuel guarantees
Loss Contingencies [Line Items]
Number of days after expiration of statutes of limitations				90 days
Maximum potential liability	470	470		$ 470
Other guarantees
Loss Contingencies [Line Items]
Maximum potential liability	51	51		51
Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding	123	123		$ 123
Reduction of Carbon Emissions by Early 2020s
Loss Contingencies [Line Items]
Commitment to reduce carbon emissions, percentage				32.00%
Reduction of Carbon Emissions by 2030
Loss Contingencies [Line Items]
Commitment to reduce carbon emissions, percentage				50.00%
Reduction of Carbon Emissions by 2040
Loss Contingencies [Line Items]
Commitment to reduce carbon emissions, percentage				80.00%
The Sierra Club
Loss Contingencies [Line Items]
Amount accrued for settlement	7	7		$ 7
DTE Gas | NEXUS pipeline
Loss Contingencies [Line Items]
Maximum potential liability	226	226		$ 226
Guarantee termination, minimum threshold, period following end of primary term of capacity lease agreements				2 months
Texas Eastern Transmission, LP | NEXUS pipeline
Loss Contingencies [Line Items]
Maximum potential liability	360	360		$ 360
Percentage of payment obligations due				50.00%
Guarantee termination, minimum threshold, period following end of primary term of capacity lease agreements				2 months
Vector | Revolving Term Credit Facility
Loss Contingencies [Line Items]
Revolving term credit facility amount							$ 70,000,000
Maximum potential payments under line of credit	51	51		$ 51
Vector | NEXUS pipeline
Loss Contingencies [Line Items]
Maximum potential liability	$ 7	$ 7		$ 7
Percentage of payment obligations due				50.00%
Guarantee termination, minimum threshold, period following end of primary term of capacity lease agreements				15 years
DTE Electric
Loss Contingencies [Line Items]
Number of power plants in violation | plant								5
Number of NOVs/FOVs | NOV	2	2		2
Environmental capital expenditures through prior year end						$ 2,400
Number of former MGP sites | site				3
Accrued for remediation	$ 7	$ 7		$ 7		8
Number of permitted engineered ash storage facilities owned | facility				3
Estimated utility capital expenditures, expenditures for non-utility businesses, and contributions to equity method investees	$ 2,600	2,600		$ 2,600
DTE Electric | COVID-19 Pandemic | Certain non-qualified benefit plan trusts
Loss Contingencies [Line Items]
Pre-tax investment gains (losses)		$ 22		$ (9)
DTE Electric | Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Number of employees | employee	2,800	2,800		2,800
DTE Electric | Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding	$ 68	$ 68		$ 68
DTE Electric | Reduction of Carbon Emissions by 2050
Loss Contingencies [Line Items]
Goal of net carbon emissions, percentage				0.00%
DTE Electric | Coal Combustion Residual Rule
Loss Contingencies [Line Items]
Estimated impact of the current rule	609	609		$ 609
DTE Gas
Loss Contingencies [Line Items]
Number of former MGP sites | site				14
Accrued for remediation	$ 24	24		$ 24		$ 25
Amortization period (in years)				10 years
DTE Gas | COVID-19 Pandemic | Certain non-qualified benefit plan trusts
Loss Contingencies [Line Items]
Pre-tax investment gains (losses)		$ 2		$ (1)
DTE Gas | Clean up completed and site closed
Loss Contingencies [Line Items]
Number of former MGP sites | site				8
DTE Gas | Partial closure complete
Loss Contingencies [Line Items]
Number of former MGP sites | site				4
DTE Gas | Reduction of Greenhouse Gas Emissions by 2050
Loss Contingencies [Line Items]
Goal of net greenhouse gas emissions, percentage	0.00%
DTE Gas | DTE Gas | NEXUS pipeline
Loss Contingencies [Line Items]
Percentage of payment obligations due				50.00%
NEXUS | DTE Gas | NEXUS pipeline
Loss Contingencies [Line Items]
Agreement term				15 years
NEXUS | Texas Eastern Transmission, LP | NEXUS pipeline
Loss Contingencies [Line Items]
Agreement term				15 years
NEXUS | Vector | NEXUS pipeline
Loss Contingencies [Line Items]
Agreement term				15 years