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Segment and Related Information (Tables)
 9 Months Ended
Sep. 30, 2016
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,
 
2016
 
2015
 
2016
 
2015
 
(In millions)
Inter-segment Revenues
 
 
 
 
 
 
 
Electric
$
15

 
$
9

 
$
32

 
$
27

Gas
5

 
1

 
8

 
2

Gas Storage and Pipelines
2

 
1

 
7

 
7

Power and Industrial Projects
178

 
204

 
476

 
599

Energy Trading
10

 
7

 
28

 
23

Corporate and Other
—

 
1

 
2

 
2

 
$
210

 
$
223

 
$
553

 
$
660


Financial data of DTE Energy's business segments follows:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2016
 
2015
 
2016
 
2015
 
(In millions)
Operating Revenues — Utility operations
 
 
 
 
 
 
 
Electric
$
1,608

 
$
1,386

 
$
3,976

 
$
3,737

Gas
160

 
153

 
911

 
1,018

Operating Revenues — Non-utility operations
 
 
 
 
 
 
 
Gas Storage and Pipelines
63

 
61

 
199

 
175

Power and Industrial Projects
524

 
585

 
1,414

 
1,708

Energy Trading
782

 
635

 
1,807

 
1,870

Corporate and Other
1

 
1

 
2

 
2

Reconciliation and Eliminations
(210
)
 
(223
)
 
(553
)
 
(660
)
Total
$
2,928

 
$
2,598

 
$
7,756

 
$
7,850


Net Income (Loss) Attributable to DTE Energy by Segment:
 
 
 
 
 
 
 
Electric
$
285

 
$
214

 
$
547

 
$
449

Gas
(4
)
 
(11
)
 
96

 
93

Gas Storage and Pipelines
28

 
27

 
93

 
79

Power and Industrial Projects
34

 
32

 
66

 
73

Energy Trading
(4
)
 
12

 
(34
)
 
—

Corporate and Other
(1
)
 
(9
)
 
(31
)
 
(47
)
Net Income Attributable to DTE Energy Company
$
338

 
$
265

 
$
737

 
$
647