Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Millions	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Consolidated Statements of Comprehensive Income [Abstract]
Net Income	$ 378	$ 317
Benefit obligations:
Benefit obligation, net of taxes of $1 and $2	2	4
Amounts reclassified to benefit obligations related to consolidation of VIEs (Note 1), net of taxes of $x and $5		10
Total Benefit obligations	2	14
Net unrealized gains (losses) on derivatives:
Gains (losses) during the period, net of taxes of $x and $1		1
Amounts reclassified to income, net of taxes of $x and $1		1
Net unrealized gains (losses) on derivatives		2
Net unrealized gains (losses) on investments:
Gains (losses) during the period, net of taxes of $x and $(6)		(12)
Amounts reclassified to benefit obligations related to consolidation of VIEs (Note 1), net of taxes of $x and $(5)		(10)
Net unrealized gains (losses) on investments		(22)
Foreign currency translation, net of taxes of $x and $x	1
Comprehensive income	381	311
Less: Comprehensive income attributable to noncontrolling interests		2
Comprehensive income attributable to DTE Energy Company	$ 381	$ 309

Amounts Reclassified To Benefit Obligations Related To Consolidation Of Variable Interest Entities.

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Amounts Reclassified To Benefit Obligations Related To Consolidation Of Variable Interest Entities Two.

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Benefit obligations net of tax.

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Gross appreciation or the gross loss in value of the total unsold securities at the end of an accounting period, after tax.

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Net changes to accumulated comprehensive income during the period related to benefit plans, after tax.

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Adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into functional currency of the reporting entity, net of tax.

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