Segment Information (Tables)

12 Months Ended

Dec. 31, 2013

Segment Reporting [Abstract]

Inter segment billing for goods and services [Table Text Block]

Inter-segment billing for goods and services exchanged between segments is based upon tariffed or market-based prices of the provider and primarily consists of the sale of reduced emissions fuel, power sales and natural gas sales in the following segments:

	2013			2012			2011
	(In millions)
Electric	$	26		$	29		$	33
Gas	4			4			2
Gas Storage and Pipelines	3			6			8
Power and Industrial Projects	816			801			238
Energy Trading	43			43			70
Corporate and Other	(24		)	(37		)	(50		)
Discontinued Operations	—			2			—
	$	868		$	848		$	301

Schedule of Segment Reporting Information, by Segment [Table Text Block]

Financial data of the business segments follows:

	Operating Revenue			Depreciation, Depletion & Amortization		Interest Income			Interest Expense			Income Taxes			Net Income (Loss) Attributable to DTE Energy Company			Total Assets			Goodwill		Capital Expenditures
	(In millions)
2013
Electric	$	5,199		$	902	$	(1	)	$	268		$	252		$	484		$	17,508		$	1,208	$	1,325
Gas	1,474			95		(7		)	58			77			143			3,938			743		209
Gas Storage and Pipelines	132			23		(7		)	18			45			70			824			24		245
Power and Industrial Projects	1,950			72		(6		)	27			(45		)	66			1,067			26		93
Energy Trading	1,771			1		—			8			(38		)	(58		)	623			17		3
Corporate and Other	3			1		(51		)	120			(37		)	(44		)	2,945			—		1
Reclassifications and Eliminations	(868		)	—		63			(63		)	—			—			(970		)	—		—
Total	$	9,661		$	1,094	$	(9	)	$	436		$	254		$	661		$	25,935		$	2,018	$	1,876

	Operating Revenue			Depreciation, Depletion & Amortization		Interest Income			Interest Expense			Income Taxes			Net Income (Loss) Attributable to DTE Energy Company			Total Assets			Goodwill		Capital Expenditures
	(In millions)
2012
Electric	$	5,293		$	827	$	(1	)	$	272		$	280		$	483		$	17,755		$	1,208	$	1,230
Gas	1,315			92		(7		)	59			50			115			4,059			745		221
Gas Storage and Pipelines	96			8		(8		)	8			39			61			668			22		233
Power and Industrial Projects	1,823			65		(7		)	37			(44		)	42			991			26		83
Energy Trading	1,109			2		—			8			7			12			629			17		1
Corporate and Other	3			1		(52		)	121			(46		)	(47		)	3,074			—		3
Reclassifications and Eliminations	(848		)	—		65			(65		)	—			—			(837		)	—		—
Total from Continuing Operations	$	8,791		$	995	$	(10	)	$	440		$	286		$	666		$	26,339		$	2,018	$	1,771
Discontinued Operations (Note 7)															(56		)	—			—		49
Total															$	610		$	26,339		$	2,018	$	1,820

	Operating Revenue			Depreciation, Depletion & Amortization		Interest Income			Interest Expense			Income Taxes			Net Income (Loss) Attributable to DTE Energy Company			Total Assets			Goodwill		Capital Expenditures
	(In millions)
2011
Electric	$	5,154		$	818	$	(1	)	$	289		$	265		$	434		$	17,567		$	1,208	$	1,203
Gas	1,505			89		(7		)	64			60			110			4,065			745		179
Gas Storage and Pipelines	91			6		(5		)	7			35			57			538			22		16
Power and Industrial Projects	1,129			60		(8		)	32			11			38			789			26		56
Energy Trading	1,276			3		—			9			34			52			612			17		1
Corporate & Other	4			1		(47		)	145			(136		)	23			2,605			—		—
Reclassifications and Eliminations	(301		)	—		58			(58		)	(1		)	—			(485		)	—		—
Total from Continuing Operations	$	8,858		$	977	$	(10	)	$	488		$	268		$	714		$	25,691		$	2,018	$	1,455
Discontinued Operations (Note 7)															(3		)	318			2		29
Total															$	711		$	26,009		$	2,020	$	1,484