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Segment Information (Notes)
12 Months Ended
Dec. 31, 2013
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 is 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:
 
2013
 
2012
 
2011
 
(In millions)
Electric
$
26

 
$
29

 
$
33

Gas
4

 
4

 
2

Gas Storage and Pipelines
3

 
6

 
8

Power and Industrial Projects
816

 
801

 
238

Energy Trading
43

 
43

 
70

Corporate and Other
(24
)
 
(37
)
 
(50
)
Discontinued Operations

 
2

 

 
$
868

 
$
848

 
$
301



Financial data of the business segments follows:
 
Operating
Revenue
 
Depreciation,
Depletion &
Amortization
 
Interest
Income
 
Interest
Expense
 
Income
Taxes
 
Net Income (Loss)
Attributable
to DTE
Energy
Company
 
Total
Assets
 
Goodwill
 
Capital
Expenditures
 
(In millions)
2013
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Electric
$
5,199

 
$
902

 
$
(1
)
 
$
268

 
$
252

 
$
484

 
$
17,508

 
$
1,208

 
$
1,325

Gas
1,474

 
95

 
(7
)
 
58

 
77

 
143

 
3,938

 
743

 
209

Gas Storage and Pipelines
132

 
23

 
(7
)
 
18

 
45

 
70

 
824

 
24

 
245

Power and Industrial Projects
1,950

 
72

 
(6
)
 
27

 
(45
)
 
66

 
1,067

 
26

 
93

Energy Trading
1,771

 
1

 

 
8

 
(38
)
 
(58
)
 
623

 
17

 
3

Corporate and Other
3

 
1

 
(51
)
 
120

 
(37
)
 
(44
)
 
2,945

 

 
1

Reclassifications and Eliminations
(868
)
 

 
63

 
(63
)
 

 

 
(970
)
 

 

Total
$
9,661

 
$
1,094

 
$
(9
)
 
$
436

 
$
254

 
$
661

 
$
25,935

 
$
2,018

 
$
1,876


 
Operating
Revenue
 
Depreciation,
Depletion &
Amortization
 
Interest
Income
 
Interest
Expense
 
Income
Taxes
 
Net Income (Loss)
Attributable
to DTE
Energy
Company
 
Total
Assets
 
Goodwill
 
Capital
Expenditures
 
(In millions)
2012
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Electric
$
5,293

 
$
827

 
$
(1
)
 
$
272

 
$
280

 
$
483

 
$
17,755

 
$
1,208

 
$
1,230

Gas
1,315

 
92

 
(7
)
 
59

 
50

 
115

 
4,059

 
745

 
221

Gas Storage and Pipelines
96

 
8

 
(8
)
 
8

 
39

 
61

 
668

 
22

 
233

Power and Industrial Projects
1,823

 
65

 
(7
)
 
37

 
(44
)
 
42

 
991

 
26

 
83

Energy Trading
1,109

 
2

 

 
8

 
7

 
12

 
629

 
17

 
1

Corporate and Other
3

 
1

 
(52
)
 
121

 
(46
)
 
(47
)
 
3,074

 

 
3

Reclassifications and Eliminations
(848
)
 

 
65

 
(65
)
 

 

 
(837
)
 

 

Total from Continuing Operations
$
8,791

 
$
995

 
$
(10
)
 
$
440

 
$
286

 
$
666

 
$
26,339

 
$
2,018

 
$
1,771

Discontinued Operations (Note 7)
 
 
 
 
 
 
 
 
 
 
(56
)
 

 

 
49

Total
 
 
 
 
 
 
 
 
 
 
$
610

 
$
26,339

 
$
2,018

 
$
1,820

 
Operating
Revenue
 
Depreciation,
Depletion &
Amortization
 
Interest
Income
 
Interest
Expense
 
Income
Taxes
 
Net Income (Loss)
Attributable
to DTE
Energy
Company
 
Total
Assets
 
Goodwill
 
Capital
Expenditures
 
(In millions)
2011
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Electric
$
5,154

 
$
818

 
$
(1
)
 
$
289

 
$
265

 
$
434

 
$
17,567

 
$
1,208

 
$
1,203

Gas
1,505

 
89

 
(7
)
 
64

 
60

 
110

 
4,065

 
745

 
179

Gas Storage and Pipelines
91

 
6

 
(5
)
 
7

 
35

 
57

 
538

 
22

 
16

Power and Industrial Projects
1,129

 
60

 
(8
)
 
32

 
11

 
38

 
789

 
26

 
56

Energy Trading
1,276

 
3

 

 
9

 
34

 
52

 
612

 
17

 
1

Corporate & Other
4

 
1

 
(47
)
 
145

 
(136
)
 
23

 
2,605

 

 

Reclassifications and Eliminations
(301
)
 

 
58

 
(58
)
 
(1
)
 

 
(485
)
 

 

Total from Continuing Operations
$
8,858

 
$
977

 
$
(10
)
 
$
488

 
$
268

 
$
714

 
$
25,691

 
$
2,018

 
$
1,455

Discontinued Operations (Note 7)
 
 
 
 
 
 
 
 
 
 
(3
)
 
318

 
2

 
29

Total
 
 
 
 
 
 
 
 
 
 
$
711

 
$
26,009

 
$
2,020

 
$
1,484