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Segment and Related Information
 9 Months Ended
Sep. 30, 2016
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 2.2 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 reduced emissions fuel, and sell electricity from renewable energy projects.
Energy Trading consists of energy marketing and trading operations.
Corporate and Other includes various holding company activities, holds certain non-utility debt, and holds 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,
 
2016
 
2015
 
2016
 
2015
 
(In millions)
Inter-segment Revenues
 
 
 
 
 
 
 
Electric
$
15

 
$
9

 
$
32

 
$
27

Gas
5

 
1

 
8

 
2

Gas Storage and Pipelines
2

 
1

 
7

 
7

Power and Industrial Projects
178

 
204

 
476

 
599

Energy Trading
10

 
7

 
28

 
23

Corporate and Other
—

 
1

 
2

 
2

 
$
210

 
$
223

 
$
553

 
$
660


Financial data of DTE Energy's business segments follows:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2016
 
2015
 
2016
 
2015
 
(In millions)
Operating Revenues — Utility operations
 
 
 
 
 
 
 
Electric
$
1,608

 
$
1,386

 
$
3,976

 
$
3,737

Gas
160

 
153

 
911

 
1,018

Operating Revenues — Non-utility operations
 
 
 
 
 
 
 
Gas Storage and Pipelines
63

 
61

 
199

 
175

Power and Industrial Projects
524

 
585

 
1,414

 
1,708

Energy Trading
782

 
635

 
1,807

 
1,870

Corporate and Other
1

 
1

 
2

 
2

Reconciliation and Eliminations
(210
)
 
(223
)
 
(553
)
 
(660
)
Total
$
2,928

 
$
2,598

 
$
7,756

 
$
7,850


Net Income (Loss) Attributable to DTE Energy by Segment:
 
 
 
 
 
 
 
Electric
$
285

 
$
214

 
$
547

 
$
449

Gas
(4
)
 
(11
)
 
96

 
93

Gas Storage and Pipelines
28

 
27

 
93

 
79

Power and Industrial Projects
34

 
32

 
66

 
73

Energy Trading
(4
)
 
12

 
(34
)
 
—

Corporate and Other
(1
)
 
(9
)
 
(31
)
 
(47
)
Net Income Attributable to DTE Energy Company
$
338

 
$
265

 
$
737

 
$
647