Commitments and Contingencies (Details Textuals)	1 Months Ended	6 Months Ended	12 Months Ended
	May 31, 2015 USD ($)	Jun. 30, 2016 USD ($) instance facility	Dec. 31, 2015 USD ($)	Dec. 31, 2010 violation	Jul. 31, 2009 facility
Synthetic Fuel
Loss Contingencies [Line Items]
Number of days after expiration of statutes of limitations		90 days
Maximum potential liability		$ 850,000,000
Emissions
Loss Contingencies [Line Items]
Number of days after expiration of statutes of limitations		90 days
Maximum potential liability		$ 323,000,000
Other Guarantees
Loss Contingencies [Line Items]
Maximum potential liability		55,000,000
Performance Surety Bonds
Loss Contingencies [Line Items]
Performance bonds outstanding		54,000,000
DTE Electric
Loss Contingencies [Line Items]
Number of power plants in violation | facility					5
Environmental capital expenditures through prior year end			$ 2,300,000,000
Estimated environmental capital expenditures in current year		$ 45,000,000
Number of permitted engineered coal ash storage facilities owned | facility		3
Time period to comply with coal combustion residual requirements and effluent limitations guidelines		7 years
DTE Gas
Loss Contingencies [Line Items]
Number of former Mgp sites | facility		14
Accrued for remediation		$ 38,000,000	22,000,000
Amortization period (in years)		10 years
EPA Multimedia Inspection | EES Coke
Loss Contingencies [Line Items]
Number of NOVs/FOVs | instance		2
Yolo Solano County Health Department in California and the District Attorney Subpoena
Loss Contingencies [Line Items]
Loss accrual		$ 3,000,000
Riverview Energy Systems, LLC, NOV | Riverview Energy Systems, LLC
Loss Contingencies [Line Items]
Ownership percent	50.00%
Required payment amount	$ 375,000
PADEP NOV
Loss Contingencies [Line Items]
Number of NOVs/FOVs | violation				2
Penalties accrued		190,000	$ 534,000
Coal Combustion Residual Rule | DTE Electric
Loss Contingencies [Line Items]
Estimated costs associated with building new facilities		$ 280,000,000
Clean Up Completed and Site Closed | DTE Gas
Loss Contingencies [Line Items]
Number of former Mgp sites | facility		5
Partial Closure Expected By End of Fiscal Year | DTE Gas
Loss Contingencies [Line Items]
Number of former Mgp sites | facility		3