Commitments and Contingencies (Details Textuals) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2017 USD ($) employee NOV	Jun. 30, 2017 USD ($) employee facility NOV site	Dec. 31, 2016 USD ($)	Sep. 07, 2016 state	Jul. 31, 2009 plant
Loss Contingencies [Line Items]
Unrecorded unconditional purchase obligation	$ 3,000	$ 3,000
Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Number of employees | employee	4,800	4,800
Synthetic fuel
Loss Contingencies [Line Items]
Number of days after expiration of statutes of limitations		90 days
Maximum potential liability	$ 620	$ 620
Reduced emissions fuel guarantees
Loss Contingencies [Line Items]
Number of days after expiration of statutes of limitations		90 days
Maximum potential liability	340	$ 340
Other guarantees
Loss Contingencies [Line Items]
Maximum potential liability	55	55
Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding	56	$ 56
Yolo Solano County Health Department in California and the District Attorney Subpoena
Loss Contingencies [Line Items]
Final settlement amount	$ 4
DTE Electric
Loss Contingencies [Line Items]
Number of states with NOX emissions from power plants | state				22
Number of power plants in violation | plant					5
Number of NOVs/FOVs | NOV	2	2
Environmental capital expenditures through prior year end			$ 2,400
Number of former Mgp sites | site		3
Accrued for remediation	$ 8	$ 8	8
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	$ 1,500	$ 1,500
DTE Electric | Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Number of employees | employee	2,600	2,600
DTE Electric | Coal combustion residual rule
Loss Contingencies [Line Items]
Estimated costs associated with building new facilities		$ 313
DTE Gas
Loss Contingencies [Line Items]
Number of former Mgp sites | site		14
Accrued for remediation	$ 41	$ 41	$ 43
Amortization period (in years)		10 years
DTE Gas | NEXUS pipeline
Loss Contingencies [Line Items]
Maximum potential liability	64	$ 64
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		5
Texas Eastern Transmission, LP | NEXUS pipeline
Loss Contingencies [Line Items]
Maximum potential liability	$ 9	$ 9
Lease agreement term		15 years
Percentage of payment obligations due		50.00%