SEGMENT INFORMATION (Tables)

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Schedule of information related to reportable segments

The following tables show summarized financial information for the three and nine months ended September 30, 2018 and 2017, related to our reportable segments:

(in millions)	Utility		Other			Wisconsin Public Service Corporation Consolidated
Three Months Ended September 30, 2018
Operating revenues	$	379.2	$	—		$	379.2
Other operation and maintenance	114.5		0.1			114.6
Depreciation and amortization	35.7		—			35.7
Operating income (loss)	86.6		(0.2		)	86.4
Other income, net	8.7		0.2			8.9
Interest expense	13.4		—			13.4

(in millions)	Utility		Other			Wisconsin Public Service Corporation Consolidated
Three Months Ended September 30, 2017
Operating revenues	$	380.7	$	—		$	380.7
Other operation and maintenance *	102.5		(0.1		)	102.4
Depreciation and amortization	35.0		0.1			35.1
Operating income *	108.2		—			108.2
Other income, net *	5.4		0.1			5.5
Interest expense	13.7		—			13.7

* Includes the retroactive restatement impacts of the implementation of ASU 2017-07. See Note 13, Employee Benefits, for more information on this new standard.

(in millions)	Utility		Other			Wisconsin Public Service Corporation Consolidated
Nine Months Ended September 30, 2018
Operating revenues	$	1,122.9	$	—		$	1,122.9
Other operation and maintenance	322.4		0.3			322.7
Depreciation and amortization	105.2		—			105.2
Operating income (loss)	228.5		(0.5		)	228.0
Other income, net	25.5		1.5			27.0
Interest expense	39.4		—			39.4

(in millions)	Utility		Other			Wisconsin Public Service Corporation Consolidated
Nine Months Ended September 30, 2017
Operating revenues	$	1,111.9	$	—		$	1,111.9
Other operation and maintenance *	318.0		0.4			318.4
Depreciation and amortization	103.9		—			103.9
Operating income (loss) *	239.7		(0.4		)	239.3
Other income, net *	15.2		1.9			17.1
Interest expense	41.2		—			41.2

* Includes the retroactive restatement impacts of the implementation of ASU 2017-07. See Note 13, Employee Benefits, for more information on this new standard.