Segment Information (Tables)

3 Months Ended

Mar. 31, 2012

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



	Three Months Ended
	March 31
	2012			2011
	(In millions)
Electric Utility	$	7		$	9
Gas Utility	1			—
Gas Storage and Pipelines	1			2
Power and Industrial Projects	191			26
Energy Trading	14			22
Corporate and Other	(10		)	(17		)
	$	204		$	42

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

Financial data of the business segments follows:



	Three Months Ended
	March 31
(In millions)	2012			2011
Operating Revenues
Electric Utility	$	1,198		$	1,193
Gas Utility	509			689
Gas Storage and Pipelines	25			25
Unconventional Gas Production	10			8
Power and Industrial Projects	449			235
Energy Trading	261			322
Corporate & Other	1			1
Reconciliation & Eliminations	(204		)	(42		)
Total	$	2,249		$	2,431
Net Income (Loss) Attributable to DTE Energy by Segment:
Electric Utility	$	96		$	85
Gas Utility	52			83
Gas Storage and Pipelines	17			15
Unconventional Gas Production	(1		)	(2		)
Power and Industrial Projects	8			10
Energy Trading	(2		)	2
Corporate & Other	(14		)	(17		)
Net Income Attributable to DTE Energy	$	156		$	176

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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