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Segment and Related Information (Tables)
 6 Months Ended
Jun. 30, 2018
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information, by Segment
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 June 30,
 
Six Months Ended June 30,
 
2018
 
2017
 
2018
 
2017
 
(In millions)
Electric
$
13

 
$
13

 
$
26

 
$
25

Gas
4

 
2

 
6

 
5

Gas Storage and Pipelines
14

 
15

 
22

 
22

Power and Industrial Projects
162

 
156

 
317

 
324

Energy Trading
5

 
8

 
12

 
19

Corporate and Other
—

 
—

 
1

 
1

 
$
198

 
$
194

 
$
384

 
$
396


Financial data of DTE Energy's business segments follows:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2018
 
2017
 
2018
 
2017
 
(In millions)
Operating Revenues — Utility operations
 
 
 
 
 
 
 
Electric
$
1,276

 
$
1,218

 
$
2,481

 
$
2,393

Gas
255

 
220

 
805

 
777

Operating Revenues — Non-utility operations
 
 
 
 
 
 
 
Gas Storage and Pipelines
122

 
113

 
241

 
218

Power and Industrial Projects
538

 
507

 
1,105

 
1,055

Energy Trading
1,164

 
991

 
2,662

 
2,043

Corporate and Other
2

 
—

 
2

 
1

Reconciliation and Eliminations
(198
)
 
(194
)
 
(384
)
 
(396
)
Total
$
3,159

 
$
2,855

 
$
6,912

 
$
6,091


Net Income (Loss) Attributable to DTE Energy by Segment:
 
 
 
 
 
 
 
Electric
$
163

 
$
138

 
$
303

 
$
244

Gas
14

 
1

 
118

 
108

Gas Storage and Pipelines
60

 
40

 
122

 
85

Power and Industrial Projects
43

 
30

 
88

 
60

Energy Trading
(5
)
 
—

 
26

 
96

Corporate and Other
(41
)
 
(32
)
 
(62
)
 
(16
)
Net Income Attributable to DTE Energy Company
$
234

 
$
177

 
$
595

 
$
577