Retirement Benefits and Trusteed Assets (Details Textuals) - USD ($)		1 Months Ended	12 Months Ended
	Feb. 17, 2015	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, cost recognized (less than $1 million in 2012)			$ 49,000,000	$ 48,000,000	$ 41,000,000
Contribution of common stock to pension plan					200,000,000
Transfers into Level 3			0	0
Transfers out of Level 3			0	2,000,000
Grantor Trust Balance			18,000,000	18,000,000
DTE Electric
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, cost recognized (less than $1 million in 2012)			$ 23,000,000	24,000,000	$ 21,000,000
Retirement Savings Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contribution to employee savings plan			4.00%
Retirement Savings Plan | DTE Gas Represented Employees
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contribution to employee savings plan			8.00%
Qualified Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contributions			$ 177,000,000
Qualified Pension Plan | DTE Electric
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contributions			145,000,000
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contributions			$ 183,000,000	$ 195,000,000
Expected return on plan assets			7.75%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate			4.50%	4.12%	4.95%
Transfers into Level 3			$ 0	$ 0
Transfers out of Level 3			0	0
Pension Plan | DTE Electric
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contributions			145,000,000	149,000,000
Pension Plan | Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated future employer contributions in next fiscal year			180,000,000
Pension Plan | Maximum | DTE Electric
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated future employer contributions in next fiscal year			145,000,000
Other Postretirement Benefit Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contributions			$ 199,000,000	$ 24,000,000
Expected return on plan assets			8.00%
Defined Benefit Plan, Retiree Reimbursement Account, Minimum Age Requirement for Coverage		65 years			65 years
Retiree Health Care Allowance will increase at lower of the rate of medical inflation or a set percentage		2.00%
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components			$ 6,000,000
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation			100,000,000
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components			5,000,000
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation			$ 86,000,000
Defined Benefit Plan, Term of Employment Contract		4 years
Annual allocation to Retiree Reimbursement Account Per Participant, Retired after January 1, 2013		$ 3,250
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		4.30%	4.50%	4.10%	4.95%	4.15%
Contribution of common stock to pension plan			$ 117,000,000
Transfers into Level 3			0	$ 0
Transfers out of Level 3			0	0
Other Postretirement Benefit Plan | DTE Electric
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contributions			175,000,000	0
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components			4,000,000
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation			74,000,000
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components			4,000,000
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation			64,000,000
Other Postretirement Benefit Plan | Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated future employer contributions in next fiscal year			20,000,000
Retiree Healthcare Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, cost recognized (less than $1 million in 2012)			5,000,000	4,000,000	$ 2,000,000
Retiree Healthcare Plan | DTE Electric
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, cost recognized (less than $1 million in 2012)			3,000,000	$ 2,000,000	$ 1,000,000
VEBA Trust | Other Postretirement Benefit Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contributions			82,000,000
Contribution of common stock to pension plan	$ 117,000,000
VEBA Trust | Other Postretirement Benefit Plan | DTE Electric
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contributions			$ 58,000,000