SEGMENTS OF BUSINESS

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

SEGMENTS OF BUSINESS

SEGMENTS OF BUSINESS

At June 30, 2013, we reported three segments. We manage our reportable segments separately due to their different operating and regulatory environments. Our principal business segments are the regulated electric utility operations and the regulated natural gas utility operations. The other segment includes nonutility activities, as well as equity earnings from our investments in WRPC and WPS Investments, LLC, which holds an interest in ATC.

The table below presents information related to our reportable segments:

	Regulated Utilities
(Millions)	Electric Utility			Natural Gas Utility			Total Utility			Other		Reconciling Eliminations			WPS Consolidated
Three Months Ended June 30, 2013
External revenues	$	306.4		$	61.4		$	367.8		$	—	$	—		$	367.8
Intersegment revenues	—			2.4			2.4			0.3		(2.7		)	—
Depreciation and amortization expense	23.8			4.0			27.8			0.2		(0.2		)	27.8
Miscellaneous income	2.1			—			2.1			3.8		—			5.9
Interest expense	7.7			2.2			9.9			0.4		—			10.3
Provision for income taxes	14.5			0.3			14.8			1.0		—			15.8
Preferred stock dividend requirements	(0.6		)	(0.2		)	(0.8		)	—		—			(0.8		)
Net income attributed to common shareholder	23.1			0.3			23.4			2.5		—			25.9
	Regulated Utilities
(Millions)	Electric Utility			Natural Gas Utility			Total Utility			Other		Reconciling Eliminations			WPS Consolidated
Three Months Ended June 30, 2012
External revenues	$	292.5		$	45.0		$	337.5		$	—	$	—		$	337.5
Intersegment revenues	—			1.8			1.8			0.3		(2.1		)	—
Depreciation and amortization expense	20.2			3.8			24.0			0.2		(0.2		)	24.0
Miscellaneous income	0.5			—			0.5			4.0		—			4.5
Interest expense	8.1			1.9			10.0			0.6		—			10.6
Provision for income taxes	12.1			—			12.1			0.2		—			12.3
Preferred stock dividend requirements	(0.6		)	(0.2		)	(0.8		)	—		—			(0.8		)
Net income (loss) attributed to common shareholder	19.7			(0.7		)	19.0			3.6		—			22.6
	Regulated Utilities
(Millions)	Electric Utility			Natural Gas Utility			Total Utility			Other		Reconciling Eliminations			WPS Consolidated
Six Months Ended June 30, 2013
External revenues	$	614.3		$	186.9		$	801.2		$	—	$	—		$	801.2
Intersegment revenues	—			4.2			4.2			0.6		(4.8		)	—
Depreciation and amortization expense	43.3			7.9			51.2			0.3		(0.3		)	51.2
Miscellaneous income	3.7			0.1			3.8			7.1		—			10.9
Interest expense	15.9			4.3			20.2			1.0		—			21.2
Provision for income taxes	29.1			10.9			40.0			1.9		—			41.9
Preferred stock dividend requirements	(1.3		)	(0.3		)	(1.6		)	—		—			(1.6		)
Net income attributed to common shareholder	48.8			17.4			66.2			4.3		—			70.5
	Regulated Utilities
(Millions)	Electric Utility			Natural Gas Utility			Total Utility			Other		Reconciling Eliminations			WPS Consolidated
Six Months Ended June 30, 2012
External revenues	$	579.5		$	162.2		$	741.7		$	—	$	—		$	741.7
Intersegment revenues	—			3.1			3.1			0.7		(3.8		)	—
Depreciation and amortization expense	40.2			7.6			47.8			0.4		(0.3		)	47.9
Miscellaneous income	0.6			—			0.6			7.0		—			7.6
Interest expense	16.4			3.9			20.3			1.1		—			21.4
Provision for income taxes	21.5			10.7			32.2			1.5		—			33.7
Preferred stock dividend requirements	(1.3		)	(0.3		)	(1.6		)	—		—			(1.6		)
Net income attributed to common shareholder	42.6			17.3			59.9			4.8		—			64.7