Commitments and Contingencies (Details Textuals) (USD $)	1 Months Ended	12 Months Ended	0 Months Ended	4 Months Ended	8 Months Ended
	Apr. 30, 2014	Dec. 31, 2014	May 31, 2014	May 15, 2014 kWh	Dec. 31, 2014 kWh facilities dte_instances	Dec. 31, 2010 dte_instances	Dec. 31, 2013
Loss Contingencies [Line Items]
Number of NOVs						2
Possible Environmental Capital Expenditures to Comply with Requirements		$ 1,000,000
Estimated maximum spend to upgrade treatment technology to biological treatment to meet future requirements		13,000,000
Length of Notice of Intent to sue from the Group Against Smog and Pollution		60 days
Fine related to consent order and agreement with Allegheny County related to NOV	300,000
Estimated expenditures for a supplemental environmental project to enhance particulate collection efficiency		300,000
EPA Sulfur Dioxide Ambient Air Quality Standard		1 hour
Waiting Period of Policy		84 days
Total Purchase Commitments		9,015,000,000			9,015,000,000
Estimated future capital expenditures for next year		2,600,000,000			2,600,000,000
Gas [Member]
Loss Contingencies [Line Items]
Number of Former MGP Sites		15
Accrued for remediation related to the sites		24,000,000			24,000,000		28,000,000
Period Gas Utility Can Amortize MGP Costs		10 years
Electric [Member]
Loss Contingencies [Line Items]
Environmental Capital Expenditures Through Current Year		2,200,000,000
Estimated capital expenditures in next fiscal year		100,000,000
Environmental Capital Expenditures In Future Years		30,000,000
EPA is Alleging Power Plants Violated New Source Performance Standards		5			5
Number of NOVs/FOVs currently being discussed with the EPA		2			2
Time period to complete studies on cooling water intake structures impacts on fish - EPA ruling			3 years
Number of Former MGP Sites		3
Accrued for remediation related to the sites		10,000,000			10,000,000		8,000,000
Number of Permitted Engineered Ash Storage Facilities Owned		3
Insurance Coverage for Extra Expense when Power Plant Unavailable		490,000,000
Period of Coverage of Policy for Extra Expenses		3 years
Primary Coverage		1,500,000,000.0
Coverage for Stabilization Decontamination Debris Removal Repair and Replacement of Property and Decommissioning		1,250,000,000.00
Combined Coverage Limit for Total Property Damage		2,750,000,000.00
Insurance Deductible for Nuclear Power Plant		1,000,000			1,000,000
Total Limit for Property Damage for Non-Nuclear Events		2,000,000,000			2,000,000,000
Limit of Coverage for Aggregate Extra Expenses for Non-Nuclear Events		328,000,000
Limit for Property Damage for Non-Nuclear Events Aggregate of Extra Expenses of Period		2 years
Time Period for TRIA Insurance After the First Loss from Terrorism		1 year
NEIL Policies Against Terroism Loss		3,200,000,000
Amount per Event Loss Associated with Nuclear Power Plants		35,000,000
Maintenance of Public Liability Insurance for Nuclear Power Plants		375,000,000
Aggregate Limit of Liabilities Arises From Terroist Act Outside Scope of Trials Subject to One Industry		300,000,000
Deferred Premium Charged Leviied Against Each Licensed Nuclear Facility		127,000,000
Limit Deferred Premium Charges Per Year		19,000,000
Company Obligated to Pay DOE Fee of Fermi 2 Electricity Generated and Sold				1
Court of Appeals proposal to congress to reduce nuclear waste fee, amount					0
Synthetic Fuel [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		1,000,000,000			1,000,000,000
Reduced Emissions Fuel Guarantees [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		172,000,000			172,000,000
Guarantee Type, Other [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		60,000,000			60,000,000
Surety Bond [Member]
Loss Contingencies [Line Items]
Performance Bonds Outstanding		$ 49,000,000			$ 49,000,000
Represented Employees [Member]
Loss Contingencies [Line Items]
Number of Represented Employees		4,900			4,900
Cleanup completed and site closed [Member] | Gas [Member]
Loss Contingencies [Line Items]
Number of Former MGP Sites		3
Partial closure expected by end of fiscal year [Member] | Gas [Member]
Loss Contingencies [Line Items]
Number of Former MGP Sites		2