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Segment and Related Information
 9 Months Ended
Sep. 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 September 30,
 
Nine Months Ended September 30,
 
2015
 
2014
 
2015
 
2014
 
(In millions)
Inter-segment Revenues
 
 
 
 
 
 
 
Electric
$
9

 
$
8

 
$
27

 
$
22

Gas
1

 
1

 
2

 
5

Gas Storage and Pipelines
1

 
1

 
7

 
9

Power and Industrial Projects
204

 
211

 
599

 
593

Energy Trading
7

 
8

 
23

 
24

Corporate and Other
1

 
1

 
2

 
2

 
$
223

 
$
230

 
$
660

 
$
655


Financial data of the DTE Energy business segments follows:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2015
 
2014
 
2015
 
2014
 
(In millions)
Operating Revenues
 
 
 
 
 
 
 
Electric
$
1,386

 
$
1,358

 
$
3,737

 
$
4,049

Gas
153

 
149

 
1,018

 
1,182

Gas Storage and Pipelines
61

 
49

 
175

 
146

Power and Industrial Projects
585

 
605

 
1,708

 
1,703

Energy Trading
635

 
664

 
1,870

 
2,797

Corporate and Other
1

 
—

 
2

 
1

Reconciliation and Eliminations
(223
)
 
(230
)
 
(660
)
 
(655
)
Total
$
2,598

 
$
2,595

 
$
7,850

 
$
9,223


Net Income (Loss) Attributable to DTE Energy by Segment:
 
 
 
 
 
 
 
Electric
$
214

 
$
135

 
$
449

 
$
400

Gas
(11
)
 
(16
)
 
93

 
109

Gas Storage and Pipelines
27

 
20

 
79

 
59

Power and Industrial Projects
32

 
38

 
73

 
66

Energy Trading
12

 
(22
)
 
—

 
6

Corporate and Other
(9
)
 
1

 
(47
)
 
(34
)
Net Income Attributable to DTE Energy Company
$
265

 
$
156

 
$
647

 
$
606