Segment Information (Financial Data) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Operating Revenue	$ 2,533	$ 2,387	$ 2,225	$ 2,516	$ 2,349	$ 2,190	$ 2,013	$ 2,239	$ 9,661	$ 8,791	$ 8,858
Depreciation, Depletion and Amortization									1,094	1,018	995
Interest Income									(9)
Interest Expense									436	440	488
Income Taxes									254	286	268
Net Income Attributable to DTE Energy Company	124	198	105	234	81	227	146	156	661	610	711
Total Assets	25,935				26,339				25,935	26,339	26,009
Goodwill	2,018				2,018				2,018	2,018	2,020
Capital Expenditures									1,876	1,820	1,484
Electric [Member]
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization									902	827	818
Interest Income									(1)	(1)	(1)
Interest Expense									268	272	289
Income Taxes									252	280	265
Net Income Attributable to DTE Energy Company									484	483	434
Total Assets	17,508				17,755				17,508	17,755	17,567
Goodwill	1,208				1,208				1,208	1,208	1,208
Capital Expenditures									1,325	1,230	1,203
Gas [Member]
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization									95	92	89
Interest Income									(7)	(7)	(7)
Interest Expense									58	59	64
Income Taxes									77	50	60
Net Income Attributable to DTE Energy Company									143	115	110
Total Assets	3,938				4,059				3,938	4,059	4,065
Goodwill	743				745				743	745	745
Capital Expenditures									209	221	179
Gas Storage and Pipelines [Member]
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization									23	8	6
Interest Income									(7)	(8)	(5)
Interest Expense									18	8	7
Income Taxes									45	39	35
Net Income Attributable to DTE Energy Company									70	61	57
Total Assets	824				668				824	668	538
Goodwill	24				22				24	22	22
Capital Expenditures									245	233	16
Power and Industrial Projects [Member]
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization									72	65	60
Interest Income									(6)	(7)	(8)
Interest Expense									27	37	32
Income Taxes									(45)	(44)	11
Net Income Attributable to DTE Energy Company									66	42	38
Total Assets	1,067				991				1,067	991	789
Goodwill	26				26				26	26	26
Capital Expenditures									93	83	56
Energy Trading [Member]
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization									1	2	3
Interest Income									0	0	0
Interest Expense									8	8	9
Income Taxes									(38)	7	34
Net Income Attributable to DTE Energy Company									(58)	12	52
Total Assets	623				629				623	629	612
Goodwill	17				17				17	17	17
Capital Expenditures									3	1	1
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization									1	1	1
Interest Income									(51)	(52)	(47)
Interest Expense									120	121	145
Income Taxes									(37)	(46)	(136)
Net Income Attributable to DTE Energy Company									(44)	(47)	23
Total Assets	2,945				3,074				2,945	3,074	2,605
Goodwill	0				0				0	0	0
Capital Expenditures									1	3	0
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization									0	0	0
Interest Income									63	65	58
Interest Expense									(63)	(65)	(58)
Income Taxes									0	0	(1)
Net Income Attributable to DTE Energy Company									0	0	0
Total Assets	(970)				(837)				(970)	(837)	(485)
Goodwill	0				0				0	0	0
Capital Expenditures									0	0	0
Segment, Continuing Operations [Member]
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization										995	977
Interest Income										(10)	(10)
Interest Expense										440	488
Income Taxes										286	268
Net Income Attributable to DTE Energy Company										666	714
Total Assets					26,339					26,339	25,691
Goodwill					2,018					2,018	2,018
Capital Expenditures										1,771	1,455
Segment, Discontinued Operations [Member]
Segment Reporting Information [Line Items]
Net Income Attributable to DTE Energy Company										(56)	(3)
Total Assets					0					0	318
Goodwill					0					0	2
Capital Expenditures										49	29
Operating Segments [Member] | Electric [Member]
Segment Reporting Information [Line Items]
Operating Revenue									5,199	5,293	5,154
Operating Segments [Member] | Gas [Member]
Segment Reporting Information [Line Items]
Operating Revenue									1,474	1,315	1,505
Operating Segments [Member] | Gas Storage and Pipelines [Member]
Segment Reporting Information [Line Items]
Operating Revenue									132	96	91
Operating Segments [Member] | Power and Industrial Projects [Member]
Segment Reporting Information [Line Items]
Operating Revenue									1,950	1,823	1,129
Operating Segments [Member] | Energy Trading [Member]
Segment Reporting Information [Line Items]
Operating Revenue									1,771	1,109	1,276
Operating Segments [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating Revenue									3	3	4
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue, Net									(868)	(848)	(301)
Intersegment Eliminations [Member] | Electric [Member]
Segment Reporting Information [Line Items]
Revenue, Net									(26)	(29)	(33)
Intersegment Eliminations [Member] | Gas [Member]
Segment Reporting Information [Line Items]
Revenue, Net									(4)	(4)	(2)
Intersegment Eliminations [Member] | Gas Storage and Pipelines [Member]
Segment Reporting Information [Line Items]
Revenue, Net									(3)	(6)	(8)
Intersegment Eliminations [Member] | Power and Industrial Projects [Member]
Segment Reporting Information [Line Items]
Revenue, Net									(816)	(801)	(238)
Intersegment Eliminations [Member] | Energy Trading [Member]
Segment Reporting Information [Line Items]
Revenue, Net									(43)	(43)	(70)
Intersegment Eliminations [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenue, Net									24	37	50
Intersegment Eliminations [Member] | Segment, Discontinued Operations [Member]
Segment Reporting Information [Line Items]
Revenue, Net									$ 0	$ (2)	$ 0