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Discontinued Operations (Tables)
12 Months Ended
Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]  
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]
 
 
 
2012
 
2011
 
(In millions)
 
 
Operating Revenues
$
55

 
$
39

 
 
 
 
Operation and Maintenance
24

 
16

Depreciation, Depletion and Amortization
23

 
18

Taxes Other Than Income
4

 
3

Asset (Gains) and Losses, Net
83

 

 
134

 
37

Operating Income (Loss)
(79
)
 
2

Other (Income) and Deductions
6

 
6

Loss Before Income Taxes
(85
)
 
(4
)
Income Tax Expense (Benefit)
(29
)
 
(1
)
Net Loss Attributable to DTE Energy Company
$
(56
)
 
$
(3
)