Commitments and Contingencies (Details Textuals) $ in Millions		1 Months Ended	9 Months Ended
	Jul. 23, 2020 USD ($)	Jun. 30, 2020	Sep. 30, 2020 USD ($) employee site facility plant	May 31, 2020 plant	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
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
Synthetic fuel
Loss Contingencies [Line Items]
Number of days after expiration of statutes of limitations			90 days
Maximum potential liability			$ 400
Reduced emissions fuel guarantees
Loss Contingencies [Line Items]
Number of days after expiration of statutes of limitations			90 days
Maximum potential liability			$ 543
Other guarantees
Loss Contingencies [Line Items]
Maximum potential liability			50
Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding			$ 125
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			$ 5
DTE Gas | NEXUS pipeline
Loss Contingencies [Line Items]
Maximum potential liability			$ 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
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			$ 52
Vector | NEXUS pipeline
Loss Contingencies [Line Items]
Maximum potential liability			$ 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 power plants with requirement to retire, repower, refuel or retrofit units | plant				4
Environmental capital expenditures			$ 2,400
Number of former MGP sites | site			3
Accrued for remediation			$ 6		$ 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
DTE Electric | Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Number of employees | employee			2,800
DTE Electric | Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding			$ 69
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			$ 629
DTE Electric | The Sierra Club
Loss Contingencies [Line Items]
Amount paid related to settlement	$ 2
DTE Gas
Loss Contingencies [Line Items]
Number of former MGP sites | site			14
Accrued for remediation			$ 24		$ 25
Amortization period (in years)			10 years
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