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BUSINESS SEGMENTS
 6 Months Ended
Jun. 30, 2014
Text Block [Abstract]  
BUSINESS SEGMENTS
BUSINESS SEGMENTS
We have three reportable segments regularly reviewed by our chief operating decision makers to evaluate performance and make operating decisions.
(1)
TEP, a regulated electric utility and our largest subsidiary
(2)
UNS Electric, a regulated electric utility
(3)
UNS Gas, a regulated gas distribution utility
We disclose selected financial data for our reportable segments in the following tables:
 
Reportable Segments
 
 
 
 
 
 
 
TEP
 
UNS Electric
 
UNS Gas
 
Other (2)
 
Reconciling
Adjustments
 
UNS
Energy
 
Millions of Dollars
Three Months Ended June 30, 2014
 
Operating Revenues-External
$
318

 
$
47

 
$
22

 
$
—

 
$
—

 
$
387

Operating Revenues-Intersegment(1)
4

 
—

 
1

 
4

 
(9
)
 
—

Income Before Income Taxes
61

 
6

 
—

 
—

 
—

 
67

Net Income
39

 
4

 
—

 
(1
)
 
—

 
42

 
 
 
 
 
 
 
 
 
 
 
 
Three Months Ended June 30, 2013
 
 
 
 
 
 
 
 
 
 
 
Operating Revenues-External
$
300

 
$
44

 
$
21

 
$
—

 
$
—

 
$
365

Operating Revenues-Intersegment(1)
4

 
—

 
1

 
4

 
(9
)
 
—

Income Before Income Taxes
32

 
6

 
—

 
—

 
—

 
38

Net Income
31

 
4

 
—

 
—

 
—

 
35

 
Reportable Segments
 
 
 
 
 
 
 
TEP
 
UNS Electric
 
UNS Gas
 
Other (2)
 
Reconciling
Adjustments
 
UNS
Energy
 
Millions of Dollars
Six Months Ended June 30, 2014
 
 
 
 
 
 
 
 
 
 
 
Operating Revenues-External
$
569

 
87

 
64

 
$
—

 
$
—

 
$
720

Operating Revenues-Intersegment (1)
8

 
1

 
1

 
8

 
(18
)
 
—

Income Before Income Taxes
76

 
9

 
8

 
(1
)
 
—

 
92

Net Income
48

 
6

 
5

 
(1
)
 
—

 
58

 
 
 
 
 
 
 
 
 
 
 
 
Six Months Ended June 30, 2013
 
 
 
 
 
 
 
 
 
 
 
Operating Revenues-External
$
543

 
$
80

 
$
73

 
$
1

 
$
—

 
$
697

Operating Revenues-Intersegment (1)
9

 
1

 
1

 
8

 
(19
)
 
—

Income Before Income Taxes
35

 
9

 
13

 
—

 
—

 
57

Net Income
32

 
6

 
8

 
—

 
—

 
46

(1) 
Operating Revenues-Intersegment includes common costs (system, facilities, etc.) allocated to affiliates on a cost-causative basis and recorded as revenue by TEP, sales of power between TEP and UNS Electric at third-party market prices, control area services provided by TEP to UNS Electric based on a FERC-approved tariff, sales of gas by UNS Gas at third-party market prices for use in UNS Electric's generating facilities, and supplemental workforce charges (primarily meter reading services) provided to the utilities by an unregulated affiliate.
(2) 
Other includes the UNS Energy and UES holding companies, Millennium, and UED.