v3.4.0.3
Segment Information
 3 Months Ended
Mar. 31, 2016
Segment Reporting [Abstract]  
SEGMENT INFORMATION
SEGMENT INFORMATION

We reorganized our business segments during the third quarter of 2015 to reflect our new internal organization and management structure following the acquisition of Integrys. We use operating income to measure segment profitability and allocate resources to our businesses. All prior period amounts impacted by this change were reclassified to conform to the new presentation. At March 31, 2016, we reported six segments, which are described below.

•
The Wisconsin segment includes the electric and natural gas utility and non-utility operations of WE, WG, and WPS, including WE's and WPS's electric and natural gas operations in the state of Michigan.

•
The Illinois segment includes the natural gas utility and non-utility operations of PGL and NSG.

•
The other states segment includes the natural gas utility and non-utility operations of MERC and MGU.

•
The electric transmission segment includes our approximate 60% ownership interest in ATC, a for-profit, electric transmission company regulated by the FERC and certain state regulatory commissions.

•
The We Power segment includes our nonregulated entity that owns and leases generating facilities to WE.

•
The corporate and other segment includes the operations of the WEC Energy Group holding company, the Integrys holding company, the People's Energy, LLC holding company, Wispark LLC, Bostco LLC, Wisvest LLC, Wisconsin Energy Capital Corporation, WBS, PDL, and ITF. The sale of ITF was completed in the first quarter of 2016. See Note 3, Dispositions, for more information on the sale of ITF.

All of our operations are located within the United States. The following tables show summarized financial information concerning our reportable segments for the three months ended March 31, 2016 and 2015:
 
 
Regulated Operations
 
 
 
 
 
 
 
 
(in millions)
 
Wisconsin
 
Illinois
 
Other States
 
Electric Transmission
 
Total Regulated
Operations
 
We Power
 
Corporate
and Other
 
Reconciling
Eliminations
 
WEC Energy Group Consolidated
Three Months Ended
 
 

 
 

 
 
 
 

 
 

 
 
 
 

 
 

 
 

March 31, 2016
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
External revenues
 
$
1,579.8

 
$
448.5

 
$
148.4

 
$
—

 
$
2,176.7

 
$
6.2

 
$
11.9

 
$
—

 
$
2,194.8

Intersegment revenues
 
0.1

 
—

 
—

 
—

 
0.1

 
104.5

 
—

 
(104.6
)
 
—

Other operation and maintenance
 
491.3

 
117.9

 
30.0

 
—

 
639.2

 
0.4

 
(3.5
)
 
(104.6
)
 
531.5

Depreciation and amortization
 
122.9

 
32.8

 
5.1

 
—

 
160.8

 
17.0

 
10.1

 
—

 
187.9

Operating income (loss)
 
327.5

 
137.0

 
31.8

 
—

 
496.3

 
93.3

 
(0.3
)
 
—

 
589.3

Equity in earnings of transmission affiliate
 
—

 
—

 
—

 
38.5

 
38.5

 
—

 
—

 
—

 
38.5

Interest expense
 
44.5

 
9.7

 
2.5

 
—

 
56.7

 
15.6

 
31.3

 
(2.7
)
 
100.9


 
 
Regulated Operations
 
 
 
 
 
 
 
 
(in millions)
 
Wisconsin
 
Illinois
 
Other States
 
Electric Transmission
 
Total Regulated
Operations
 
We Power
 
Corporate
and Other
 
Reconciling
Eliminations
 
WEC Energy Group Consolidated
Three Months Ended
 
 

 
 

 
 
 
 

 
 

 
 
 
 

 
 

 
 

March 31, 2015
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
External revenues
 
$
1,376.5

 
$
—

 
$
—

 
$
—

 
$
1,376.5

 
$
11.1

 
$
0.3

 
$
—

 
$
1,387.9

Intersegment revenues
 
0.4

 
—

 
—

 
—

 
0.4

 
98.6

 
—

 
(99.0
)
 
—

Other operation and maintenance
 
369.1

 
—

 
—

 
—

 
369.1

 
0.4

 
10.1

 
(98.9
)
 
280.7

Depreciation and amortization
 
85.4

 
—

 
—

 
—

 
85.4

 
16.8

 
0.4

 
—

 
102.6

Operating income (loss)
 
276.5

 
—

 
—

 
—

 
276.5

 
92.5

 
(10.2
)
 
—

 
358.8

Equity in earnings of transmission affiliate
 
—

 
—

 
—

 
16.1

 
16.1

 
—

 
—

 
—

 
16.1

Interest expense
 
31.4

 
—

 
—

 
—

 
31.4

 
15.9

 
12.2

 
(0.1
)
 
59.4