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Report of Business Segments
3 Months Ended
Mar. 31, 2016
Segment Reporting Information [Line Items]  
Report of Business Segments
Report of Business Segments

The Company reports its operations in two business segments: (i) the electric utility segment, which is engaged in the generation, transmission, distribution and sale of electric energy, and (ii) natural gas midstream operations segment.

Intersegment revenues are recorded at prices comparable to those of unaffiliated customers and are affected by regulatory considerations.

The following tables summarize the results of the Company's business segments for the three months ended March 31, 2016 and 2015.
Three Months Ended March 31, 2016
Electric Utility
Natural Gas Midstream Operations
Other Operations
Eliminations
Total
(In millions)
 
 
 
 
 
Operating revenues
$
433.1

$

$

$

$
433.1

Cost of sales
177.9




177.9

Other operation and maintenance
116.3

0.2

(2.6
)

113.9

Depreciation and amortization
76.7


1.8


78.5

Taxes other than income
23.6


1.3


24.9

Operating income (loss)
38.6

(0.2
)
(0.5
)

37.9

Equity in earnings of unconsolidated affiliates

28.3



28.3

Other income (expense)
5.3


0.3

(0.1
)
5.5

Interest expense
35.5


0.9

(0.1
)
36.3

Income tax expense (benefit)
2.3

10.1

(2.2
)

10.2

Net income
$
6.1

$
18.0

$
1.1

$

$
25.2

Investment in unconsolidated affiliates
$

$
1,187.4

$

$

$
1,187.4

Total assets
$
8,288.5

$
1,467.9

$
98.7

$
(331.8
)
$
9,523.3



Three Months Ended March 31, 2015
Electric Utility
Natural Gas Midstream Operations
Other Operations
Eliminations
Total
(In millions)
 
 
 
 
 
Operating revenues
$
480.1

$

$

$

$
480.1

Cost of sales
211.6




211.6

Other operation and maintenance
114.3

0.8

(3.4
)

111.7

Depreciation and amortization
73.8


2.1


75.9

Taxes other than income
23.1


1.4


24.5

Operating income (loss)
57.3

(0.8
)
(0.1
)

56.4

Equity in earnings of unconsolidated affiliates

31.7



31.7

Other income (expense)
2.9


2.5


5.4

Interest expense
36.8


0.6


37.4

Income tax expense (benefit)
6.3

8.1

(1.5
)

12.9

Net income
$
17.1

$
22.8

$
3.3

$

$
43.2

Investment in unconsolidated affiliates
$

$
1,315.7

$

$

$
1,315.7

Total assets
$
8,217.7

$
1,476.7

$
122.3

$
(332.4
)
$
9,484.3