XML 32 R37.htm IDEA: XBRL DOCUMENT v2.4.0.6
Segment Information (Tables)
 9 Months Ended
Sep. 30, 2012
Segment Reporting [Abstract]  
Inter segment billing for goods and services [Table Text Block]
 
Three Months Ended
 
Nine Months Ended
 
September 30
 
September 30
 
2012
 
2011
 
2012
 
2011
Electric Utility
$
7

 
$
7

 
$
22

 
$
25

Gas Utility
1

 
1

 
3

 
2

Gas Storage and Pipelines
1

 
1

 
5

 
7

Unconventional Gas Production
1

 
—

 
1

 
—

Power and Industrial Projects
225

 
30

 
608

 
119

Energy Trading
10

 
17

 
34

 
54

Corporate and Other
(11
)
 
(12
)
 
(28
)
 
(40
)
 
$
234

 
$
44

 
$
645

 
$
167
Schedule of Segment Reporting Information, by Segment [Table Text Block]


Financial data of the business segments follows (in millions):
 
Three Months Ended
 
Nine Months Ended
 
September 30
 
September 30
 
2012
 
2011
 
2012
 
2011
Operating Revenues
 
 
 
 
 
 
 
Electric Utility
$
1,543

 
$
1,517

 
$
4,031

 
$
3,950

Gas Utility
160

 
159

 
883

 
1,090

Gas Storage and Pipelines
21

 
21

 
73

 
69

Unconventional Gas Production
16

 
11

 
38

 
29

Power and Industrial Projects
477

 
259

 
1,375

 
781

Energy Trading
223

 
342

 
723

 
970

Corporate and Other
—

 
—

 
2

 
2

Reconciliation & Eliminations
(234
)
 
(44
)
 
(645
)
 
(167
)
Total
$
2,206

 
$
2,265

 
$
6,480

 
$
6,724

 
 
 
 
 
 
 
 
Net Income (Loss) Attributable to DTE Energy by Segment:
 
 
 
 
 
 
 
Electric Utility
$
194

 
$
157

 
$
417

 
$
345

Gas Utility
4

 
(11
)
 
60

 
69

Gas Storage and Pipelines
14

 
13

 
48

 
42

Unconventional Gas Production
—

 
(2
)
 
(3
)
 
(5
)
Power and Industrial Projects
22

 
12

 
40

 
27

Energy Trading
1

 
22

 
3

 
36

Corporate and Other (a)
(8
)
 
(8
)
 
(36
)
 
47

Net Income Attributable to DTE Energy
$
227

 
$
183

 
$
529

 
$
561