SEGMENT INFORMATION

3 Months Ended

Mar. 31, 2018

We use operating income to measure segment profitability and to allocate resources to our businesses. At March 31, 2018, we reported two segments, which are described below.

Our utility segment includes our electric and natural gas utility operations. 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, and to one customer in the Upper Peninsula of Michigan. Our electric utility operations also include our steam operations, which produce, distribute, and sell steam to customers in metropolitan Milwaukee, Wisconsin. 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 our three service areas within southeastern, east central, and northern Wisconsin.

Our other segment includes 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. See Note 2, Disposition, for more information.

The following tables show summarized financial information for the three months ended March 31, 2018 and 2017, related to our reportable segments:



(in millions)	Utility		Other		Wisconsin Electric Power Company Consolidated
Three Months Ended March 31, 2018
Operating revenues	$	941.5	$	—	$	941.5
Other operation and maintenance	335.6		—		335.6
Depreciation and amortization	85.3		—		85.3
Operating income	136.4		—		136.4
Interest expense	29.7		—		29.7



(in millions)	Utility		Other		Wisconsin Electric Power Company Consolidated
Three Months Ended March 31, 2017
Operating revenues	$	972.0	$	—	$	972.0
Other operation and maintenance *	326.6		—		326.6
Depreciation and amortization	82.1		—		82.1
Operating income *	186.3		—		186.3
Interest expense	29.3		0.3		29.6


*	Includes the retroactive restatement impacts of the implementation of ASU 2017-07. See Note 11, Employee Benefits, for more information on this new standard.