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Discontinued Operations Discontinued Operations (Tables)
6 Months Ended
Jun. 30, 2013
Discontinued Operations [Abstract]  
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]
 
Three Months Ended
 
Six Months Ended
 
June 30, 2012
 
June 30, 2012
 
(In millions)
Operating Revenues
$
12

 
$
22

 
 
 
 
Operation and Maintenance
5

 
10

Depreciation, Depletion and Amortization
6

 
11

Taxes Other Than Income
1

 
1

Operating Income

 

Other (Income) and Deductions
2

 
3

Income Tax Benefit
(1
)
 
(2
)
Net Income Attributable to DTE Energy Company
$
(1
)
 
$
(1
)