Segments Of Business (Tables)

3 Months Ended

Mar. 31, 2014

Segment Reporting Information [Line Items]

Schedule Of Segments Of Business

Certain financial information relating to Alliant Energy’s business segments is as follows. Intersegment revenues were not material to Alliant Energy’s operations.

	Utilities								Non-Regulated,			Alliant Energy
	Electric		Gas		Other		Total		Parent and Other			Consolidated
	(in millions)
Three Months Ended March 31, 2014
Operating revenues		$675.8		$240.7		$22.8		$939.3		$13.5			$952.8
Operating income	94.3		43.0		7.9		145.2		9.0			154.2
Net income attributable to Alliant Energy common shareowners							98.2		9.8			108.0
Three Months Ended March 31, 2013
Operating revenues		$633.2		$197.3		$17.2		$847.7		$11.9			$859.6
Operating income	73.6		37.3		2.9		113.8		6.9			120.7
Amounts attributable to Alliant Energy common shareowners:
Income from continuing operations, net of tax							64.9		8.0			72.9
Loss from discontinued operations, net of tax							—		(3.0		)	(3.0		)
Net income attributable to Alliant Energy common shareowners							64.9		5.0			69.9

IPL [Member]

Segment Reporting Information [Line Items]

Schedule Of Segments Of Business

Certain financial information relating to IPL’s business segments is as follows. Intersegment revenues were not material to IPL’s operations.

	Electric		Gas		Other		Total
	(in millions)
Three Months Ended March 31, 2014
Operating revenues		$374.2		$135.7		$19.0		$528.9
Operating income	26.5		23.3		7.7		57.5
Earnings available for common stock							43.4
Three Months Ended March 31, 2013
Operating revenues		$350.2		$114.3		$13.4		$477.9
Operating income	17.2		20.7		3.2		41.1
Earnings available for common stock							22.9

WPL [Member]

Segment Reporting Information [Line Items]

Schedule Of Segments Of Business

Certain financial information relating to WPL’s business segments is as follows. Intersegment revenues were not material to WPL’s operations.

	Electric		Gas		Other			Total
	(in millions)
Three Months Ended March 31, 2014
Operating revenues		$301.6		$105.0		$3.8			$410.4
Operating income	67.8		19.7		0.2			87.7
Earnings available for common stock								54.8
Three Months Ended March 31, 2013
Operating revenues		$283.0		$83.0		$3.8			$369.8
Operating income (loss)	56.4		16.6		(0.3		)	72.7
Earnings available for common stock								42.0