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Segment and Related Information
 6 Months Ended
Jun. 30, 2015
Segment Reporting [Abstract]  
Segment and Related Information
SEGMENT AND RELATED INFORMATION
DTE Energy sets strategic goals, allocates resources and evaluates performance based on the following structure:
Electric segment consists principally of DTE Electric, which is engaged in the generation, purchase, distribution and sale of electricity to approximately 2.1 million residential, commercial and industrial customers in southeastern Michigan.
Gas segment consists principally of DTE Gas, which is engaged in the purchase, storage, transportation, distribution and sale of natural gas to approximately 1.2 million residential, commercial and industrial customers throughout Michigan and the sale of storage and transportation capacity.
Gas Storage and Pipelines consists of natural gas pipeline, gathering and storage businesses.
Power and Industrial Projects is comprised primarily of projects that deliver energy and utility-type products and services to industrial, commercial and institutional customers; produce REF and sell electricity from renewable energy projects.
Energy Trading consists of energy marketing and trading operations.
Corporate and Other includes various holding company activities and holds certain non-utility debt and energy-related investments.
The federal income tax provisions or benefits of DTE Energy’s subsidiaries are determined on an individual company basis and recognize the tax benefit of tax credits and net operating losses if applicable. The state and local income tax provisions of the utility subsidiaries are determined on an individual company basis and recognize the tax benefit of various tax credits and net operating losses, if applicable. The subsidiaries record federal, state and local income taxes payable to or receivable from DTE Energy based on the federal, state and local tax provisions of each company.
Inter-segment billing for goods and services exchanged between segments is based upon tariffed or market-based prices of the provider and primarily consists of the sale of reduced emissions fuel, power sales and natural gas sales in the following segments:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2015
 
2014
 
2015
 
2014
 
(In millions)
Inter-segment Revenues
 
 
 
 
 
 
 
Electric
$
9

 
$
7

 
$
18

 
$
14

Gas
—

 
2

 
1

 
4

Gas Storage and Pipelines
5

 
7

 
6

 
8

Power and Industrial Projects
215

 
176

 
395

 
382

Energy Trading
7

 
7

 
16

 
16

Corporate and Other
—

 
(1
)
 
1

 
1

 
$
236

 
$
198

 
$
437

 
$
425


Financial data of the DTE Energy business segments follows:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2015
 
2014
 
2015
 
2014
 
(In millions)
Operating Revenues
 
 
 
 
 
 
 
Electric
$
1,148

 
$
1,279

 
$
2,351

 
$
2,691

Gas
218

 
229

 
865

 
1,033

Gas Storage and Pipelines
57

 
45

 
114

 
97

Power and Industrial Projects
556

 
523

 
1,123

 
1,098

Energy Trading
524

 
819

 
1,235

 
2,133

Corporate and Other
1

 
1

 
1

 
1

Reconciliation and Eliminations
(236
)
 
(198
)
 
(437
)
 
(425
)
Total
$
2,268

 
$
2,698

 
$
5,252

 
$
6,628


Net Income (Loss) Attributable to DTE Energy by Segment:
 
 
 
 
 
 
 
Electric
$
99

 
$
129

 
$
235

 
$
265

Gas
(7
)
 
(4
)
 
104

 
125

Gas Storage and Pipelines
25

 
18

 
52

 
39

Power and Industrial Projects
8

 
13

 
41

 
28

Energy Trading
(3
)
 
(14
)
 
(12
)
 
28

Corporate and Other
(13
)
 
(18
)
 
(38
)
 
(35
)
Net Income Attributable to DTE Energy Company
$
109

 
$
124

 
$
382

 
$
450