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Segment Information (Notes)
 9 Months Ended
Sep. 30, 2014
Segment Reporting [Abstract]  
Segment Information
SEGMENT AND RELATED INFORMATION

The Company 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 biomass-fired 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 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 production 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,
 
2014
 
2013
 
2014
 
2013
 
(In millions)
Inter-segment Revenues
 
 
 
 
 
 
 
Electric
$
8

 
$
6

 
$
22

 
$
19

Gas
1

 
2

 
5

 
4

Gas Storage and Pipelines
1

 
(2
)
 
9

 
2

Power and Industrial Projects
211

 
231

 
593

 
621

Energy Trading
8

 
13

 
24

 
36

Corporate and Other
1

 
(8
)
 
2

 
(23
)
 
$
230

 
$
242

 
$
655

 
$
659



Financial data of the business segments follows:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2014
 
2013
 
2014
 
2013
 
(In millions)
Operating Revenues
 
 
 
 
 
 
 
Electric
$
1,358

 
$
1,458

 
$
4,049

 
$
3,942

Gas
149

 
161

 
1,182

 
1,013

Gas Storage and Pipelines
49

 
34

 
146

 
92

Power and Industrial Projects
605

 
512

 
1,703

 
1,431

Energy Trading
664

 
463

 
2,797

 
1,307

Corporate and Other
—

 
1

 
1

 
2

Reconciliation & Eliminations
(230
)
 
(242
)
 
(655
)
 
(659
)
Total
$
2,595

 
$
2,387

 
$
9,223

 
$
7,128


Net Income (Loss) Attributable to DTE Energy by Segment:
 
 
 
 
 
 
 
Electric
$
135

 
$
179

 
$
400

 
$
383

Gas
(16
)
 
(13
)
 
109

 
91

Gas Storage and Pipelines
20

 
16

 
59

 
49

Power and Industrial Projects
38

 
27

 
66

 
46

Energy Trading
(22
)
 
(6
)
 
6

 
(1
)
Corporate and Other
1

 
(5
)
 
(34
)
 
(31
)
Net Income Attributable to DTE Energy Company
$
156

 
$
198

 
$
606

 
$
537