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Segment and Related Information (Tables)
 9 Months Ended
Sep. 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 September 30,
 
Nine Months Ended September 30,
 
2018
 
2017
 
2018
 
2017
 
(In millions)
Electric
$
13

 
$
11

 
$
39

 
$
36

Gas
3

 
1

 
9

 
6

Gas Storage and Pipelines
7

 
10

 
29

 
32

Power and Industrial Projects
171

 
138

 
488

 
462

Energy Trading
6

 
8

 
18

 
27

Corporate and Other
1

 
1

 
2

 
2

 
$
201

 
$
169

 
$
585

 
$
565


Financial data of DTE Energy's business segments follows:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2018
 
2017
 
2018
 
2017
 
(In millions)
Operating Revenues — Utility operations
 
 
 
 
 
 
 
Electric
$
1,521

 
$
1,434

 
$
4,002

 
$
3,827

Gas
164

 
152

 
969

 
929

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

 
115

 
363

 
333

Power and Industrial Projects
612

 
537

 
1,717

 
1,592

Energy Trading
1,332

 
1,174

 
3,994

 
3,217

Corporate and Other
—

 
2

 
2

 
3

Reconciliation and Eliminations
(201
)
 
(169
)
 
(585
)
 
(565
)
Total
$
3,550

 
$
3,245

 
$
10,462

 
$
9,336


Net Income (Loss) Attributable to DTE Energy by Segment:
 
 
 
 
 
 
 
Electric
$
305

 
$
219

 
$
608

 
$
463

Gas
(30
)
 
(15
)
 
88

 
93

Gas Storage and Pipelines
66

 
36

 
188

 
121

Power and Industrial Projects
58

 
44

 
146

 
104

Energy Trading
(13
)
 
1

 
13

 
97

Corporate and Other
(52
)
 
(15
)
 
(114
)
 
(31
)
Net Income Attributable to DTE Energy Company
$
334

 
$
270

 
$
929

 
$
847