Selected Consolidated Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Components Of Selected Consolidated Quarterly Financial Data

All “per share” references refer to earnings per diluted share. Summation of the individual quarters may not equal annual totals due to rounding. Refer to Note 19 for additional information on discontinued operations.

	2014											2013
	March 31		June 30			Sep. 30			Dec. 31			March 31			June 30			Sep. 30			Dec. 31
	(in millions, except per share data)
Operating revenues		$952.8		$750.3			$843.1			$804.1			$859.6			$718.0			$866.6			$832.6
Operating income	154.2		103.3			194.8			91.3			120.7			103.2			201.4			108.6
Amounts attributable to Alliant Energy common shareowners:
Income from continuing operations, net of tax	108.0		62.1			155.2			60.2			72.9			65.9			158.9			66.5
Loss from discontinued operations, net of tax	—		(0.3		)	(1.9		)	(0.2		)	(3.0		)	(0.6		)	(1.3		)	(1.0		)
Net income	108.0		61.8			153.3			60.0			69.9			65.3			157.6			65.5
Earnings per weighted average common share attributable to Alliant Energy common shareowners:
Income from continuing operations, net of tax	0.97		0.56			1.40			0.54			0.66			0.59			1.43			0.60
Loss from discontinued operations, net of tax	—		—			(0.02		)	—			(0.03		)	—			(0.01		)	(0.01		)
Net income	0.97		0.56			1.38			0.54			0.63			0.59			1.42			0.59

IPL [Member]

Components Of Selected Consolidated Quarterly Financial Data

Earnings per share data is not disclosed for IPL given Alliant Energy is the sole shareowner of all shares of IPL’s common stock outstanding during the periods presented.

	2014								2013
	March 31		June 30		Sep. 30		Dec. 31		March 31		June 30		Sep. 30		Dec. 31
	(in millions)
Operating revenues		$528.9		$411.9		$476.2		$431.1		$477.9		$383.4		$494.4		$463.1
Operating income	57.5		34.0		93.9		23.8		41.1		34.7		100.0		36.2
Net income	46.0		20.9		105.1		22.6		31.5		24.7		112.6		21.1
Earnings available for common stock	43.4		18.4		102.5		20.1		22.9		22.2		110.0		18.5

WPL [Member]

Components Of Selected Consolidated Quarterly Financial Data

Earnings per share data is not disclosed for WPL given Alliant Energy is the sole shareowner of all shares of WPL’s common stock outstanding during the periods presented.

	2014								2013
	March 31		June 30		Sep. 30		Dec. 31		March 31		June 30		Sep. 30		Dec. 31
	(in millions)
Operating revenues		$410.4		$324.5		$354.4		$359.8		$369.8		$319.9		$360.9		$355.7
Operating income	87.7		60.0		93.9		59.4		72.7		59.7		95.9		67.8
Net income	54.8		34.6		61.6		29.8		43.6		34.4		61.3		38.2
Earnings available for common stock	54.8		34.6		61.6		29.1		42.0		34.4		61.3		38.2