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Segment Information (Notes)
 6 Months Ended
Jun. 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 of DTE Gas and Citizens.  DTE Gas 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. Citizens distributes natural gas in Adrian, Michigan to approximately 17,000 customers.

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 (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 recognizes 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
 
Six Months Ended
 
June 30,
 
June 30,
 
2014
 
2013
 
2014
 
2013
 
(In millions)
 
 
 
 
Inter-segment Revenues
 
 
 
 
 
 
 
Electric
$
7

 
$
7

 
$
14

 
$
13

Gas
2

 
1

 
4

 
2

Gas Storage and Pipelines
7

 
2

 
8

 
4

Power and Industrial Projects
176

 
185

 
382

 
390

Energy Trading
7

 
12

 
16

 
23

Corporate and Other
(1
)
 
(7
)
 
1

 
(15
)
 
$
198

 
$
200

 
$
425

 
$
417



Financial data of the business segments follows:
 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2014
 
2013
 
2014
 
2013
 
(In millions)
 
 
 
 
Operating Revenues
 
 
 
 
 
 
 
Electric
$
1,279

 
$
1,265

 
$
2,691

 
$
2,484

Gas
229

 
248

 
1,033

 
852

Gas Storage and Pipelines
45

 
31

 
97

 
58

Power and Industrial Projects
523

 
429

 
1,098

 
919

Energy Trading
819

 
451

 
2,133

 
844

Corporate & Other
1

 
1

 
1

 
1

Reconciliation & Eliminations
(198
)
 
(200
)
 
(425
)
 
(417
)
Total
$
2,698

 
$
2,225

 
$
6,628

 
$
4,741


Net Income (Loss) Attributable to DTE Energy by Segment:
 
 
 
 
 
 
 
Electric
$
129

 
$
89

 
$
265

 
$
204

Gas
(4
)
 
8

 
125

 
104

Gas Storage and Pipelines
18

 
16

 
39

 
33

Power and Industrial Projects
13

 
7

 
28

 
19

Energy Trading
(14
)
 
(2
)
 
28

 
5

Corporate & Other
(18
)
 
(13
)
 
(35
)
 
(26
)
Net Income Attributable to DTE Energy
$
124

 
$
105

 
$
450

 
$
339