SEGMENT INFORMATION (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Schedule of information related to reportable segments

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

(in millions)	Utility		Other			Wisconsin Public Service Corporation Consolidated
Three Months Ended June 30, 2018
Operating revenues	$	350.1	$	—		$	350.1
Other operation and maintenance	105.2		0.2			105.4
Depreciation and amortization	33.6		—			33.6
Operating income (loss)	72.6		(0.2		)	72.4
Other income, net	7.9		0.9			8.8
Interest expense	13.2		—			13.2

(in millions)	Utility		Other			Wisconsin Public Service Corporation Consolidated
Three Months Ended June 30, 2017
Operating revenues	$	341.6	$	—		$	341.6
Other operation and maintenance *	108.5		0.3			108.8
Depreciation and amortization	34.5		(0.1		)	34.4
Operating income (loss) *	58.3		(0.2		)	58.1
Other income, net *	4.5		1.4			5.9
Interest expense	13.6		—			13.6

(in millions)	Utility		Other			Wisconsin Public Service Corporation Consolidated
Six Months Ended June 30, 2018
Operating revenues	$	743.7	$	—		$	743.7
Other operation and maintenance	207.9		0.2			208.1
Depreciation and amortization	69.5		—			69.5
Operating income (loss)	141.9		(0.3		)	141.6
Other income, net	16.8		1.3			18.1
Interest expense	26.0		—			26.0

(in millions)	Utility		Other			Wisconsin Public Service Corporation Consolidated
Six Months Ended June 30, 2017
Operating revenues	$	731.2	$	—		$	731.2
Other operation and maintenance *	215.5		0.5			216.0
Depreciation and amortization	68.9		(0.1		)	68.8
Operating income (loss) *	131.5		(0.4		)	131.1
Other income, net *	9.8		1.8			11.6
Interest expense	27.5		—			27.5

* Includes the retroactive restatement impacts of the implementation of ASU 2017-07. See Note 12, Employee Benefits, for more information on this new standard.