Segments Of Business (Tables)

3 Months Ended

Mar. 31, 2015

Segment Reporting Information [Line Items]

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



	Utility								Non-Regulated,		Alliant Energy
	Electric		Gas		Other		Total		Parent and Other		Consolidated
	(in millions)
Three Months Ended March 31, 2015
Operating revenues		$671.3		$198.4		$16.4		$886.1		$11.3		$897.4
Operating income	104.7		36.3		5.3		146.3		6.6		152.9
Net income attributable to Alliant Energy common shareowners							92.4		4.2		96.6
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

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, 2015
Operating revenues		$362.6		$111.2		$15.2		$489.0
Operating income	40.3		20.6		4.6		65.5
Earnings available for common stock							47.8
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

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, 2015
Operating revenues		$308.7		$87.2		$1.2		$397.1
Operating income	64.4		15.7		0.7		80.8
Earnings available for common stock							44.6
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

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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