SEGMENTS OF BUSINESS

6 Months Ended

Jun. 30, 2014

Segment Reporting [Abstract]

SEGMENTS OF BUSINESS

Segments of Business

At June 30, 2014, we reported five segments, which are described below.

• The natural gas utility segment includes the regulated natural gas utility operations of MERC, MGU, NSG, PGL, and WPS.

• The electric utility segment includes the regulated electric utility operations of UPPCO and WPS. See Note 4, Dispositions, for information on the pending sale of UPPCO.

• The electric transmission investment segment includes our approximate 34% ownership interest in ATC. ATC is a federally regulated electric transmission company.

• The IES segment consists of a diversified nonregulated retail energy supply and services company that primarily sells electricity and natural gas in deregulated markets. See Note 4, Dispositions, for information on the pending sale of IES's retail energy business. In addition, IES invests in energy assets with renewable attributes, primarily distributed solar assets. These renewable energy asset operations will be included in the holding company and other segment after the sale of IES's retail energy business has closed.

• The holding company and other segment includes the operations of the Integrys Energy Group holding company, ITF, and the PELLC holding company, along with any nonutility activities at IBS, MERC, MGU, NSG, PGL, UPPCO, and WPS.

The tables below present information related to our reportable segments:

	Regulated Operations											Nonutility and Nonregulated Operations
(Millions)	Natural Gas Utility			Electric Utility			Electric Transmission Investment		Total Regulated Operations			IES			Holding Company and Other			Reconciling Eliminations			Integrys Energy Group Consolidated
Three Months Ended
June 30, 2014
External revenues	$	493.5		$	312.6		$	—	$	806.1		$	600.0		$	26.5		$	—		$	1,432.6
Intersegment revenues	2.8			—			—		2.8			0.4			0.3			(3.5		)	—
Goodwill impairment loss	—			—			—		—			6.7			—			—			6.7
Merger transaction costs	—			—			—		—			—			5.9			—			5.9
Transaction costs related to pending sale of UPPCO	—			—			—		—			—			0.9			—			0.9
Transaction costs related to pending sale of IES retail energy business	—			—			—		—			—			0.8			—			0.8
Depreciation and amortization expense	36.9			26.3			—		63.2			3.0			6.9			(0.2		)	72.9
Earnings from equity method investments	—			—			23.0		23.0			0.8			0.1			—			23.9
Miscellaneous income (expense)	(0.4		)	2.8			—		2.4			0.4			5.4			(3.2		)	5.0
Interest expense	13.2			12.1			—		25.3			0.5			16.1			(3.2		)	38.7
Provision (benefit) for income taxes	(7.3		)	11.0			9.2		12.9			2.4			(7.1		)	—			8.2
Net income (loss) from continuing operations	(10.5		)	17.8			13.8		21.1			(1.5		)	(11.5		)	—			8.1
Discontinued operations	—			—			—		—			(0.1		)	—			—			(0.1		)
Preferred stock dividends of subsidiary	(0.1		)	(0.7		)	—		(0.8		)	—			—			—			(0.8		)
Net income (loss) attributed to common shareholders	(10.6		)	17.1			13.8		20.3			(1.6		)	(11.5		)	—			7.2
	Regulated Operations											Nonutility and Nonregulated Operations
(Millions)	Natural Gas Utility			Electric Utility			Electric Transmission Investment		Total Regulated Operations			IES			Holding Company and Other			Reconciling Eliminations			Integrys Energy Group Consolidated
Three Months Ended
June 30, 2013
External revenues	$	367.4		$	327.0		$	—	$	694.4		$	412.6		$	9.0		$	—		$	1,116.0
Intersegment revenues	2.5			—			—		2.5			0.3			0.3			(3.1		)	—
Depreciation and amortization expense	32.3			25.8			—		58.1			2.8			4.8			(0.2		)	65.5
Earnings from equity method investments	—			—			22.0		22.0			0.5			0.3			—			22.8
Miscellaneous income	0.2			2.2			—		2.4			1.4			5.1			(3.4		)	5.5
Interest expense	11.9			8.5			—		20.4			0.5			11.1			(3.4		)	28.6
Provision (benefit) for income taxes	(0.7		)	15.7			8.4		23.4			(22.2		)	(4.5		)	—			(3.3		)
Net income (loss) from continuing operations	1.7			24.3			13.6		39.6			(41.1		)	(2.4		)	—			(3.9		)
Discontinued operations	—			—			—		—			(0.7		)	(0.1		)	—			(0.8		)
Preferred stock dividends of subsidiary	(0.2		)	(0.6		)	—		(0.8		)	—			—			—			(0.8		)
Noncontrolling interest in subsidiaries	—			—			—		—			—			0.1			—			0.1
Net income (loss) attributed to common shareholders	1.5			23.7			13.6		38.8			(41.8		)	(2.4		)	—			(5.4		)

	Regulated Operations											Nonutility and Nonregulated Operations
(Millions)	Natural Gas Utility			Electric Utility			Electric Transmission Investment		Total Regulated Operations			IES			Holding Company and Other			Reconciling Eliminations			Integrys Energy Group Consolidated
Six Months Ended
June 30, 2014
External revenues	$	1,761.0		$	661.8		$	—	$	2,422.8		$	1,889.6		$	45.1		$	—		$	4,357.5
Intersegment revenues	7.3			—			—		7.3			3.0			0.7			(11.0		)	—
Goodwill impairment loss	—			—			—		—			6.7			—			—			6.7
Merger transaction costs	—			—			—		—			—			5.9			—			5.9
Transaction costs related to pending sale of UPPCO	—			—			—		—			—			0.9			—			0.9
Transaction costs related to pending sale of IES retail energy business	—			—			—		—			—			0.8			—			0.8
Depreciation and amortization expense	73.3			51.9			—		125.2			5.9			13.4			(0.3		)	144.2
Earnings from equity method investments	—			—			45.5		45.5			0.9			0.4			—			46.8
Miscellaneous income (expense)	(0.1		)	6.3			—		6.2			0.7			10.8			(6.7		)	11.0
Interest expense	26.6			23.8			—		50.4			1.0			33.1			(6.7		)	77.8
Provision (benefit) for income taxes	59.4			29.1			18.0		106.5			8.3			(16.8		)	—			98.0
Net income (loss) from continuing operations	88.7			49.6			27.5		165.8			9.4			(13.9		)	—			161.3
Discontinued operations	—			—			—		—			(0.2		)	—			—			(0.2		)
Preferred stock dividends of subsidiary	(0.2		)	(1.4		)	—		(1.6		)	—			—			—			(1.6		)
Noncontrolling interest in subsidiaries	—			—			—		—			—			0.1			—			0.1
Net income (loss) attributed to common shareholders	88.5			48.2			27.5		164.2			9.2			(13.8		)	—			159.6
	Regulated Operations											Nonutility and Nonregulated Operations
(Millions)	Natural Gas Utility			Electric Utility			Electric Transmission Investment		Total Regulated Operations			IES			Holding Company and Other			Reconciling Eliminations			Integrys Energy Group Consolidated
Six Months Ended
June 30, 2013
External revenues	$	1,159.4		$	658.8		$	—	$	1,818.2		$	958.0		$	18.0		$	—		$	2,794.2
Intersegment revenues	4.4			—			—		4.4			0.6			0.7			(5.7		)	—
Depreciation and amortization expense	64.5			47.3			—		111.8			5.5			9.4			(0.3		)	126.4
Earnings from equity method investments	—			—			43.7		43.7			0.7			0.7			—			45.1
Miscellaneous income	0.4			3.8			—		4.2			1.8			12.3			(7.1		)	11.2
Interest expense	24.6			17.6			—		42.2			1.0			21.8			(7.1		)	57.9
Provision (benefit) for income taxes	62.6			31.8			16.7		111.1			5.1			(9.9		)	—			106.3
Net income (loss) from continuing operations	91.5			53.6			27.0		172.1			10.2			(4.0		)	—			178.3
Discontinued operations	—			—			—		—			(0.6		)	5.9			—			5.3
Preferred stock dividends of subsidiary	(0.3		)	(1.3		)	—		(1.6		)	—			—			—			(1.6		)
Noncontrolling interest in subsidiaries	—			—			—		—			—			0.1			—			0.1
Net income attributed to common shareholders	91.2			52.3			27.0		170.5			9.6			2.0			—			182.1