SEGMENTS OF BUSINESS

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

SEGMENTS OF BUSINESS

Segments of Business

At December 31, 2014, we reported three segments. We manage our reportable segments separately due to their different operating and regulatory environments. Our principal business segments are our electric utility operations and the 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. All of our operations and assets are located within the United States. The table below presents information related to our reportable segments:

	Regulated Utilities
2014 (Millions)	Electric Utility			Natural Gas Utility			Total Utility			Other		Reconciling Eliminations			WPS Consolidated
Income Statement
External revenues	$	1,222.4		$	459.9		$	1,682.3		$	—	$	—		$	1,682.3
Intersegment revenues	—			12.4			12.4			1.4		(13.8		)	—
Depreciation and amortization expense	97.4			16.2			113.6			0.6		(0.5		)	113.7
Miscellaneous income	11.1			0.4			11.5			12.9		—			24.4
Interest expense	45.1			10.2			55.3			2.1		—			57.4
Provision for income taxes	64.1			16.6			80.7			4.0		—			84.7
Preferred stock dividend requirements	(2.6		)	(0.5		)	(3.1		)	—		—			(3.1		)
Net income attributed to common shareholder	104.7			25.7			130.4			7.2		—			137.6
Total assets	3,511.0			682.3			4,193.3			85.4		—			4,278.7
Cash expenditures for long-lived assets	279.3			49.8			329.1			—		—			329.1
	Regulated Utilities
2013 (Millions)	Electric Utility			Natural Gas Utility			Total Utility			Other		Reconciling Eliminations			WPS Consolidated
Income Statement
External revenues	$	1,241.8		$	337.5		$	1,579.3		$	—	$	—		$	1,579.3
Intersegment revenues	—			10.9			10.9			1.4		(12.3		)	—
Depreciation and amortization expense	90.5			15.6			106.1			0.6		(0.5		)	106.2
Miscellaneous income	9.9			0.2			10.1			13.4		—			23.5
Interest expense	33.0			8.5			41.5			2.2		—			43.7
Provision for income taxes	61.6			16.1			77.7			4.2		—			81.9
Preferred stock dividend requirements	(2.5		)	(0.6		)	(3.1		)	—		—			(3.1		)
Net income attributed to common shareholder	102.3			25.0			127.3			7.5		—			134.8
Total assets	3,241.8			633.8			3,875.6			85.7		—			3,961.3
Cash expenditures for long-lived assets	595.5			37.7			633.2			—		—			633.2
	Regulated Utilities
2012 (Millions)	Electric Utility			Natural Gas Utility			Total Utility			Other		Reconciling Eliminations			WPS Consolidated
Income Statement
External revenues	$	1,212.0		$	287.2		$	1,499.2		$	—	$	—		$	1,499.2
Intersegment revenues	—			9.2			9.2			1.4		(10.6		)	—
Depreciation and amortization expense	81.1			15.0			96.1			0.6		(0.5		)	96.2
Miscellaneous income	2.6			0.1			2.7			13.0		—			15.7
Interest expense	32.4			7.9			40.3			2.2		—			42.5
Provision for income taxes	44.6			14.5			59.1			3.5		—			62.6
Preferred stock dividend requirements	(2.5		)	(0.6		)	(3.1		)	—		—			(3.1		)
Net income attributed to common shareholder	99.1			24.9			124.0			7.7		—			131.7
Total assets	2,747.5			668.2			3,415.7			106.2		—			3,521.9
Cash expenditures for long-lived assets	149.4			30.1			179.5			—		—			179.5