Segment Information

12 Months Ended

Dec. 31, 2019

We use operating income to measure segment profitability and to allocate resources to our businesses. At December 31, 2019, we reported two segments, which are described below.

Our utility segment includes our electric utility operations, including steam operations, and our natural gas utility operations.

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Our electric utility operations are engaged in the generation, distribution, and sale of electricity to customers in southeastern Wisconsin (including metropolitan Milwaukee), east central Wisconsin, and northern Wisconsin. In addition, our steam operations produce, distribute, and sell steam to customers in metropolitan Milwaukee. Prior to April 1, 2019, we also provided electric service to Tilden, who owns an iron ore mine in the Upper Peninsula of Michigan. This customer was transferred to UMERC on April 1, 2019 as UMERC's new natural gas-fired generation in the Upper Peninsula of Michigan is now operational.


•	Our natural gas utility operations are engaged in the purchase, distribution, and sale of natural gas to retail customers and the transportation of customer-owned natural gas in southeastern, east central, and northern Wisconsin.

No significant items were reported in the other segment during the years ended December 31, 2019 and 2018. Prior to October 2018, our other segment included Bostco, our non-utility subsidiary that was originally formed to develop and invest in real estate. In March 2017, we sold substantially all of the remaining assets of Bostco, and, in October 2018, Bostco was dissolved.

All of our operations and assets are located within the United States. The following tables show summarized financial information related to our reportable segments for the years ended December 31, 2019, 2018, and 2017.



2019 (in millions)	Utility		Other		Wisconsin Electric Power Company Consolidated
External revenues	$	3,496.7	$	—	$	3,496.7
Other operation and maintenance	1,053.1		—		1,053.1
Depreciation and amortization	384.4		—		384.4
Operating income	760.2		—		760.2
Interest expense	477.4		—		477.4
Capital expenditures	590.6		—		590.6
Total assets	13,360.8		—		13,360.8



2018 (in millions)	Utility		Other		Wisconsin Electric Power Company Consolidated
External revenues	$	3,625.0	$	—	$	3,625.0
Other operation and maintenance	1,502.4		—		1,502.4
Depreciation and amortization	348.1		—		348.1
Operating income	402.5		—		402.5
Interest expense	120.1		—		120.1
Capital expenditures	603.2		—		603.2
Total assets	13,538.3		—		13,538.3



2017 (in millions)	Utility		Other		Wisconsin Electric Power Company Consolidated
External revenues	$	3,711.7	$	—	$	3,711.7
Other operation and maintenance	1,352.0		—		1,352.0
Depreciation and amortization	331.6		—		331.6
Operating income	632.1		—		632.1
Interest expense	117.0		0.3		117.3
Capital expenditures	596.1		—		596.1
Total assets	13,121.6		—		13,121.6