Segments Of Business (Tables)

3 Months Ended

Mar. 31, 2022

Segment Reporting Information [Line Items]

Schedule Of Segments Of Business

Certain financial information relating to Alliant Energy’s, IPL’s and WPL’s business segments is as follows. Intersegment revenues were not material to their respective operations.

Alliant Energy					ATC Holdings,	Alliant
	Utility				Non-Utility,	Energy
	Electric	Gas	Other	Total	Parent and Other	Consolidated
	(in millions)
Three Months Ended March 31, 2022
Revenues	$773	$262	$11	$1,046	$22	$1,068
Operating income	181	57	3	241	7	248
Net income attributable to Alliant Energy common shareowners				179	13	192
Three Months Ended March 31, 2021
Revenues	$701	$170	$13	$884	$17	$901
Operating income	147	44	2	193	5	198
Net income attributable to Alliant Energy common shareowners				163	8	171

IPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended March 31, 2022
Revenues	$400	$139	$11	$550
Operating income	75	32	3	110
Net income available for common stock				87
Three Months Ended March 31, 2021
Revenues	$386	$91	$12	$489
Operating income	72	30	1	103
Net income available for common stock				79

WPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended March 31, 2022
Revenues	$373	$123	$—	$496
Operating income	106	25	—	131
Net income				92
Three Months Ended March 31, 2021
Revenues	$315	$79	$1	$395
Operating income	75	14	1	90
Net income				84

IPL [Member]

Segment Reporting Information [Line Items]

Schedule Of Segments Of Business

Certain financial information relating to Alliant Energy’s, IPL’s and WPL’s business segments is as follows. Intersegment revenues were not material to their respective operations.

Alliant Energy					ATC Holdings,	Alliant
	Utility				Non-Utility,	Energy
	Electric	Gas	Other	Total	Parent and Other	Consolidated
	(in millions)
Three Months Ended March 31, 2022
Revenues	$773	$262	$11	$1,046	$22	$1,068
Operating income	181	57	3	241	7	248
Net income attributable to Alliant Energy common shareowners				179	13	192
Three Months Ended March 31, 2021
Revenues	$701	$170	$13	$884	$17	$901
Operating income	147	44	2	193	5	198
Net income attributable to Alliant Energy common shareowners				163	8	171

IPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended March 31, 2022
Revenues	$400	$139	$11	$550
Operating income	75	32	3	110
Net income available for common stock				87
Three Months Ended March 31, 2021
Revenues	$386	$91	$12	$489
Operating income	72	30	1	103
Net income available for common stock				79

WPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended March 31, 2022
Revenues	$373	$123	$—	$496
Operating income	106	25	—	131
Net income				92
Three Months Ended March 31, 2021
Revenues	$315	$79	$1	$395
Operating income	75	14	1	90
Net income				84

WPL [Member]

Segment Reporting Information [Line Items]

Schedule Of Segments Of Business

Certain financial information relating to Alliant Energy’s, IPL’s and WPL’s business segments is as follows. Intersegment revenues were not material to their respective operations.

Alliant Energy					ATC Holdings,	Alliant
	Utility				Non-Utility,	Energy
	Electric	Gas	Other	Total	Parent and Other	Consolidated
	(in millions)
Three Months Ended March 31, 2022
Revenues	$773	$262	$11	$1,046	$22	$1,068
Operating income	181	57	3	241	7	248
Net income attributable to Alliant Energy common shareowners				179	13	192
Three Months Ended March 31, 2021
Revenues	$701	$170	$13	$884	$17	$901
Operating income	147	44	2	193	5	198
Net income attributable to Alliant Energy common shareowners				163	8	171

IPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended March 31, 2022
Revenues	$400	$139	$11	$550
Operating income	75	32	3	110
Net income available for common stock				87
Three Months Ended March 31, 2021
Revenues	$386	$91	$12	$489
Operating income	72	30	1	103
Net income available for common stock				79

WPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended March 31, 2022
Revenues	$373	$123	$—	$496
Operating income	106	25	—	131
Net income				92
Three Months Ended March 31, 2021
Revenues	$315	$79	$1	$395
Operating income	75	14	1	90
Net income				84