Commitments and Contingencies (Details Textuals) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2018 USD ($) employee site facility NOV	Dec. 31, 2017 USD ($)	Jul. 31, 2009 plant
Loss Contingencies [Line Items]
Unrecorded unconditional purchase obligation	$ 3,600
Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Number of employees | employee	5,000
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	$ 420
NEXUS pipeline
Loss Contingencies [Line Items]
Guarantee termination, minimum threshold, period following end of primary term of capacity lease agreements	2 months
Other guarantees
Loss Contingencies [Line Items]
Maximum potential liability	$ 55
Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding	$ 59
DTE Electric
Loss Contingencies [Line Items]
Number of power plants in violation | plant			5
Number of NOVs/FOVs | NOV	2
Environmental capital expenditures through prior year end		$ 2,400
Number of former Mgp sites | site	3
Accrued for remediation	$ 6	6
Number of permitted engineered coal ash storage facilities owned | facility	3
Time period to comply with coal combustion residual requirements and effluent limitations guidelines	6 years
Unrecorded unconditional purchase obligation	$ 1,900
DTE Electric | Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Number of employees | employee	2,700
DTE Electric | Coal combustion residual rule
Loss Contingencies [Line Items]
Estimated costs associated with building new facilities	$ 283
DTE Gas
Loss Contingencies [Line Items]
Number of former Mgp sites | site	14
Accrued for remediation	$ 40	$ 41
Amortization period (in years)	10 years
DTE Gas | NEXUS pipeline
Loss Contingencies [Line Items]
Maximum potential liability	$ 82
Lease agreement term	15 years
Percentage of payment obligations due	50.00%
DTE Gas | Clean up completed and site closed
Loss Contingencies [Line Items]
Number of former Mgp sites | site	6
DTE Gas | Partial closure complete
Loss Contingencies [Line Items]
Number of former Mgp sites | site	6
Texas Eastern Transmission, LP | NEXUS pipeline
Loss Contingencies [Line Items]
Maximum potential liability	$ 11
Lease agreement term	15 years
Percentage of payment obligations due	50.00%