Segments Of Business (Tables)

6 Months Ended

Jun. 30, 2023

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 June 30, 2023
Revenues	$799	$77	$13	$889	$23	$912
Operating income	200	2	7	209	8	217
Net income (loss) attributable to Alliant Energy common shareowners				161	(1)	160
Three Months Ended June 30, 2022
Revenues	$812	$94	$13	$919	$24	$943
Operating income	195	8	1	204	8	212
Net income attributable to Alliant Energy common shareowners				150	9	159

Alliant Energy					ATC Holdings,	Alliant
	Utility				Non-Utility,	Energy
	Electric	Gas	Other	Total	Parent and Other	Consolidated
	(in millions)
Six Months Ended June 30, 2023
Revenues	$1,567	$353	$25	$1,945	$45	$1,990
Operating income	363	52	11	426	13	439
Net income attributable to Alliant Energy common shareowners				321	2	323
Six Months Ended June 30, 2022
Revenues	$1,586	$356	$23	$1,965	$47	$2,012
Operating income	376	65	4	445	15	460
Net income attributable to Alliant Energy common shareowners				329	22	351

IPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended June 30, 2023
Revenues	$431	$44	$12	$487
Operating income	105	—	5	110
Net income				89
Three Months Ended June 30, 2022
Revenues	$442	$52	$12	$506
Operating income	104	4	1	109
Net income				87
Six Months Ended June 30, 2023
Revenues	$819	$194	$24	$1,037
Operating income	171	27	8	206
Net income				161
Six Months Ended June 30, 2022
Revenues	$843	$191	$22	$1,056
Operating income	179	36	3	218
Net income				173

WPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended June 30, 2023
Revenues	$368	$33	$1	$402
Operating income	95	2	2	99
Net income				72
Three Months Ended June 30, 2022
Revenues	$370	$42	$1	$413
Operating income	91	4	—	95
Net income				63
Six Months Ended June 30, 2023
Revenues	$748	$159	$1	$908
Operating income	192	25	3	220
Net income				160
Six Months Ended June 30, 2022
Revenues	$743	$165	$1	$909
Operating income	197	29	1	227
Net income				156

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 June 30, 2023
Revenues	$799	$77	$13	$889	$23	$912
Operating income	200	2	7	209	8	217
Net income (loss) attributable to Alliant Energy common shareowners				161	(1)	160
Three Months Ended June 30, 2022
Revenues	$812	$94	$13	$919	$24	$943
Operating income	195	8	1	204	8	212
Net income attributable to Alliant Energy common shareowners				150	9	159

Alliant Energy					ATC Holdings,	Alliant
	Utility				Non-Utility,	Energy
	Electric	Gas	Other	Total	Parent and Other	Consolidated
	(in millions)
Six Months Ended June 30, 2023
Revenues	$1,567	$353	$25	$1,945	$45	$1,990
Operating income	363	52	11	426	13	439
Net income attributable to Alliant Energy common shareowners				321	2	323
Six Months Ended June 30, 2022
Revenues	$1,586	$356	$23	$1,965	$47	$2,012
Operating income	376	65	4	445	15	460
Net income attributable to Alliant Energy common shareowners				329	22	351

IPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended June 30, 2023
Revenues	$431	$44	$12	$487
Operating income	105	—	5	110
Net income				89
Three Months Ended June 30, 2022
Revenues	$442	$52	$12	$506
Operating income	104	4	1	109
Net income				87
Six Months Ended June 30, 2023
Revenues	$819	$194	$24	$1,037
Operating income	171	27	8	206
Net income				161
Six Months Ended June 30, 2022
Revenues	$843	$191	$22	$1,056
Operating income	179	36	3	218
Net income				173

WPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended June 30, 2023
Revenues	$368	$33	$1	$402
Operating income	95	2	2	99
Net income				72
Three Months Ended June 30, 2022
Revenues	$370	$42	$1	$413
Operating income	91	4	—	95
Net income				63
Six Months Ended June 30, 2023
Revenues	$748	$159	$1	$908
Operating income	192	25	3	220
Net income				160
Six Months Ended June 30, 2022
Revenues	$743	$165	$1	$909
Operating income	197	29	1	227
Net income				156

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 June 30, 2023
Revenues	$799	$77	$13	$889	$23	$912
Operating income	200	2	7	209	8	217
Net income (loss) attributable to Alliant Energy common shareowners				161	(1)	160
Three Months Ended June 30, 2022
Revenues	$812	$94	$13	$919	$24	$943
Operating income	195	8	1	204	8	212
Net income attributable to Alliant Energy common shareowners				150	9	159

Alliant Energy					ATC Holdings,	Alliant
	Utility				Non-Utility,	Energy
	Electric	Gas	Other	Total	Parent and Other	Consolidated
	(in millions)
Six Months Ended June 30, 2023
Revenues	$1,567	$353	$25	$1,945	$45	$1,990
Operating income	363	52	11	426	13	439
Net income attributable to Alliant Energy common shareowners				321	2	323
Six Months Ended June 30, 2022
Revenues	$1,586	$356	$23	$1,965	$47	$2,012
Operating income	376	65	4	445	15	460
Net income attributable to Alliant Energy common shareowners				329	22	351

IPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended June 30, 2023
Revenues	$431	$44	$12	$487
Operating income	105	—	5	110
Net income				89
Three Months Ended June 30, 2022
Revenues	$442	$52	$12	$506
Operating income	104	4	1	109
Net income				87
Six Months Ended June 30, 2023
Revenues	$819	$194	$24	$1,037
Operating income	171	27	8	206
Net income				161
Six Months Ended June 30, 2022
Revenues	$843	$191	$22	$1,056
Operating income	179	36	3	218
Net income				173

WPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended June 30, 2023
Revenues	$368	$33	$1	$402
Operating income	95	2	2	99
Net income				72
Three Months Ended June 30, 2022
Revenues	$370	$42	$1	$413
Operating income	91	4	—	95
Net income				63
Six Months Ended June 30, 2023
Revenues	$748	$159	$1	$908
Operating income	192	25	3	220
Net income				160
Six Months Ended June 30, 2022
Revenues	$743	$165	$1	$909
Operating income	197	29	1	227
Net income				156