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Segment and Related Information (Tables)
 3 Months Ended
Mar. 31, 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 March 31,
 
2016
 
2015
 
(In millions)
Inter-segment Revenues
 
 
 
Electric
$
9

 
$
9

Gas
—

 
1

Gas Storage and Pipelines
2

 
1

Power and Industrial Projects
148

 
180

Energy Trading
10

 
9

Corporate and Other
—

 
1

 
$
169

 
$
201


Financial data of the DTE Energy business segments follows:
 
Three Months Ended March 31,
 
2016
 
2015
 
(In millions)
Operating Revenues — Utility operations
 
 
 
Electric
$
1,153

 
$
1,203

Gas
520

 
647

Operating Revenues — Non-utility operations
 
 
 
Gas Storage and Pipelines
67

 
57

Power and Industrial Projects
446

 
567

Energy Trading
549

 
711

Corporate and Other
—

 
—

Reconciliation and Eliminations
(169
)
 
(201
)
Total
$
2,566

 
$
2,984


Net Income (Loss) Attributable to DTE Energy by Segment:
 
 
 
Electric
$
127

 
$
136

Gas
87

 
111

Gas Storage and Pipelines
30

 
27

Power and Industrial Projects
17

 
33

Energy Trading
(7
)
 
(9
)
Corporate and Other
(7
)
 
(25
)
Net Income Attributable to DTE Energy Company
$
247

 
$
273