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Discontinued Operations Discontinued Operations (Tables)
9 Months Ended
Sep. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]  
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]
 
Three Months Ended
 
Nine Months Ended
 
September 30, 2012
 
September 30, 2012
 
(In millions)
Operating Revenues
$
16

 
$
38

 
 
 
 
Operation and Maintenance
6

 
16

Depreciation, Depletion and Amortization
6

 
17

Taxes Other Than Income
1

 
2

Operating Income
3

 
3

Other (Income) and Deductions
1

 
4

Income Tax Expense (Benefit)
1

 
(1
)
Net Income Attributable to DTE Energy Company
$
1

 
$