Selected Consolidated Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

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.

	2018								2017
	March 31		June 30		Sep. 30		Dec. 31		March 31		June 30		Sep. 30		Dec. 31
	(in millions, except per share data)
Revenues		$916.3		$816.1		$928.6		$873.5		$853.9		$765.3		$906.9		$856.1
Operating income	165.7		151.2		256.1		121.4		147.2		153.7		236.3		134.0
Amounts attributable to Alliant Energy common shareowners:
Income from continuing operations, net of tax	120.9		100.4		205.5		85.3		99.0		94.3		168.8		93.8
Income from discontinued operations, net of tax	—		—		—		—		1.4		—		—		—
Net income	120.9		100.4		205.5		85.3		100.4		94.3		168.8		93.8
Earnings per weighted average common share attributable to Alliant Energy common shareowners:
Income from continuing operations, net of tax	0.52		0.43		0.87		0.36		0.43		0.41		0.73		0.41
Income from discontinued operations, net of tax	—		—		—		—		0.01		—		—		—
Net income	0.52		0.43		0.87		0.36		0.44		0.41		0.73		0.41

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.

	2018								2017
	March 31		June 30		Sep. 30		Dec. 31		March 31		June 30		Sep. 30		Dec. 31
	(in millions)
Revenues		$525.8		$474.8		$547.6		$494.1		$450.5		$420.2		$527.4		$472.2
Operating income	75.6		77.7		143.1		54.4		51.3		68.1		133.8		50.9
Net income	49.3		54.2		129.1		41.6		39.8		45.3		123.0		18.9
Earnings available for common stock	46.7		51.7		126.5		39.1		37.2		42.8		120.4		16.4

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.

	2018								2017
	March 31		June 30		Sep. 30		Dec. 31		March 31		June 30		Sep. 30		Dec. 31
	(in millions)
Revenues		$381.7		$330.8		$370.7		$369.4		$393.1		$334.8		$370.2		$374.7
Operating income	84.0		63.4		104.2		61.3		88.6		76.2		93.5		75.4
Net income	54.0		39.8		76.3		38.0		45.5		38.1		49.8		53.2
Earnings available for common stock	54.0		39.8		76.3		38.0		45.5		38.1		49.8		53.2