Income Taxes (Details Textuals) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Entity Information [Line Items]
Deferred tax asset, general business tax credit carryforwards	$ 359
Deferred tax asset, alternative minimum tax credit carryforwards	284
State and local net operating loss carry-forwards	59	$ 63
Valuation allowance	36	35
Unrecognized tax benefits that would impact effective tax rate	7	2
Interest on income taxes accrued	3	1
Interest on income taxes expense	2
Federal
Entity Information [Line Items]
Operating loss carryforward	544
DTE Electric
Entity Information [Line Items]
Income tax receivable from related party	9	6
State and local net operating loss carry-forwards	1	16
Valuation allowance	0	0
Unrecognized tax benefits that would impact effective tax rate	8	3
Interest on income taxes accrued	4	$ 1
Interest on income taxes expense	3
DTE Electric | Federal
Entity Information [Line Items]
Operating loss carryforward	120
General Business Credits | DTE Electric
Entity Information [Line Items]
Tax credit carry-forward	$ 116