SEGMENT INFORMATION

9 Months Ended

Sep. 30, 2021

Segment Reporting [Abstract]

SEGMENT INFORMATION

SEGMENT INFORMATION

We use net income to measure segment profitability and to allocate resources to our businesses. At September 30, 2021, we reported two segments, which are described below.

Our utility segment includes our electric and natural gas utility operations, which serve customers in northeastern and central Wisconsin. Our electric utility operations are engaged in the generation, distribution, and sale of electricity. Our natural gas utility operations are engaged in the purchase, distribution, and sale of natural gas to retail customers as well as the transportation of customer-owned natural gas.

Our other segment primarily consists of equity earnings from our investment in Wisconsin River Power Company.

The following tables show summarized financial information for the three and nine months ended September 30, 2021 and 2020, related to our reportable segments:

(in millions)	Utility		Other		Wisconsin Public Service Corporation
Three Months Ended September 30, 2021
Operating revenues	$	381.1	$	—	$	381.1
Other operation and maintenance	102.2		—		102.2
Depreciation and amortization	47.4		—		47.4
Other income, net	7.7		0.4		8.1
Interest expense	16.1		—		16.1
Income tax expense	10.3		0.1		10.4
Net income	71.6		0.3		71.9

(in millions)	Utility		Other		Wisconsin Public Service Corporation
Three Months Ended September 30, 2020
Operating revenues	$	367.7	$	—	$	367.7
Other operation and maintenance	105.2		—		105.2
Depreciation and amortization	43.5		—		43.5
Other income, net	8.3		0.4		8.7
Interest expense	15.6		—		15.6
Income tax expense	19.5		0.1		19.6
Net income	76.0		0.3		76.3

(in millions)	Utility		Other		Wisconsin Public Service Corporation
Nine Months Ended September 30, 2021
Operating revenues	$	1,127.6	$	—	$	1,127.6
Other operation and maintenance	294.0		—		294.0
Depreciation and amortization	140.0		—		140.0
Other income, net	25.8		1.3		27.1
Interest expense	48.6		—		48.6
Income tax expense	27.3		0.3		27.6
Net income	200.4		1.0		201.4

(in millions)	Utility		Other		Wisconsin Public Service Corporation
Nine Months Ended September 30, 2020
Operating revenues	$	1,049.9	$	—	$	1,049.9
Other operation and maintenance	296.3		—		296.3
Depreciation and amortization	129.7		—		129.7
Other income, net	24.2		1.2		25.4
Interest expense	47.9		—		47.9
Income tax expense	48.1		0.3		48.4
Net income	191.3		0.9		192.2