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Discontinued Operations (Tables)
12 Months Ended
Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]  
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures
The activity of the discontinued business is shown below. The amounts exclude general corporate overhead costs, and related tax effects, and no portion of corporate interest costs were allocated to discontinued operations.
 
2012
 
(In millions)
Operating Revenues
$
55

 
 
Operation and maintenance
24

Depreciation, depletion and amortization
23

Taxes other than income
4

Asset (gains) losses, net
83

 
134

Operating Loss
(79
)
Other (Income) and Deductions
6

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