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Segments Of Business

9 Months Ended

Sep. 30, 2021

Segment Reporting Information [Line Items]

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 September 30, 2021
Revenues	$939	$50	$13	$1,002	$22	$1,024
Operating income (loss)	290	(5)	(5)	280	9	289



Net income attributable to Alliant Energy common shareowners				250	6	256
Three Months Ended September 30, 2020
Revenues	$852	$42	$10	$904	$16	$920
Operating income (loss)	251	(1)	1	251	21	272



Net income attributable to Alliant Energy common shareowners				221	25	246



Alliant Energy					ATC Holdings,	Alliant
	Utility				Non-Utility,	Energy
	Electric	Gas	Other	Total	Parent and Other	Consolidated
	(in millions)
Nine Months Ended September 30, 2021
Revenues	$2,357	$289	$36	$2,682	$60	$2,742
Operating income (loss)	601	42	(4)	639	24	663



Net income attributable to Alliant Energy common shareowners				537	34	571
Nine Months Ended September 30, 2020
Revenues	$2,257	$253	$32	$2,542	$57	$2,599
Operating income	549	48	5	602	26	628



Net income attributable to Alliant Energy common shareowners				510	40	550


IPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended September 30, 2021
Revenues	$555	$31	$13	$599
Operating income (loss)	186	(3)	(3)	180
Net income available for common stock				157
Three Months Ended September 30, 2020
Revenues	$519	$24	$10	$553
Operating income	159	1	2	162
Net income available for common stock				148
Nine Months Ended September 30, 2021
Revenues	$1,343	$165	$35	$1,543
Operating income (loss)	365	30	(1)	394
Net income available for common stock				322
Nine Months Ended September 30, 2020
Revenues	$1,332	$141	$31	$1,504
Operating income	308	34	5	347
Net income available for common stock				290


WPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended September 30, 2021
Revenues	$384	$19	$—	$403
Operating income (loss)	104	(2)	(2)	100
Net income				93
Three Months Ended September 30, 2020
Revenues	$333	$18	$—	$351
Operating income (loss)	92	(2)	(1)	89
Net income				73
Nine Months Ended September 30, 2021
Revenues	$1,014	$124	$1	$1,139
Operating income (loss)	236	12	(3)	245
Net income				215
Nine Months Ended September 30, 2020
Revenues	$925	$112	$1	$1,038
Operating income	241	14	—	255
Net income				220

IPL [Member]

Segment Reporting Information [Line Items]

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 September 30, 2021
Revenues	$939	$50	$13	$1,002	$22	$1,024
Operating income (loss)	290	(5)	(5)	280	9	289



Net income attributable to Alliant Energy common shareowners				250	6	256
Three Months Ended September 30, 2020
Revenues	$852	$42	$10	$904	$16	$920
Operating income (loss)	251	(1)	1	251	21	272



Net income attributable to Alliant Energy common shareowners				221	25	246



Alliant Energy					ATC Holdings,	Alliant
	Utility				Non-Utility,	Energy
	Electric	Gas	Other	Total	Parent and Other	Consolidated
	(in millions)
Nine Months Ended September 30, 2021
Revenues	$2,357	$289	$36	$2,682	$60	$2,742
Operating income (loss)	601	42	(4)	639	24	663



Net income attributable to Alliant Energy common shareowners				537	34	571
Nine Months Ended September 30, 2020
Revenues	$2,257	$253	$32	$2,542	$57	$2,599
Operating income	549	48	5	602	26	628



Net income attributable to Alliant Energy common shareowners				510	40	550


IPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended September 30, 2021
Revenues	$555	$31	$13	$599
Operating income (loss)	186	(3)	(3)	180
Net income available for common stock				157
Three Months Ended September 30, 2020
Revenues	$519	$24	$10	$553
Operating income	159	1	2	162
Net income available for common stock				148
Nine Months Ended September 30, 2021
Revenues	$1,343	$165	$35	$1,543
Operating income (loss)	365	30	(1)	394
Net income available for common stock				322
Nine Months Ended September 30, 2020
Revenues	$1,332	$141	$31	$1,504
Operating income	308	34	5	347
Net income available for common stock				290


WPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended September 30, 2021
Revenues	$384	$19	$—	$403
Operating income (loss)	104	(2)	(2)	100
Net income				93
Three Months Ended September 30, 2020
Revenues	$333	$18	$—	$351
Operating income (loss)	92	(2)	(1)	89
Net income				73
Nine Months Ended September 30, 2021
Revenues	$1,014	$124	$1	$1,139
Operating income (loss)	236	12	(3)	245
Net income				215
Nine Months Ended September 30, 2020
Revenues	$925	$112	$1	$1,038
Operating income	241	14	—	255
Net income				220

WPL [Member]

Segment Reporting Information [Line Items]

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 September 30, 2021
Revenues	$939	$50	$13	$1,002	$22	$1,024
Operating income (loss)	290	(5)	(5)	280	9	289



Net income attributable to Alliant Energy common shareowners				250	6	256
Three Months Ended September 30, 2020
Revenues	$852	$42	$10	$904	$16	$920
Operating income (loss)	251	(1)	1	251	21	272



Net income attributable to Alliant Energy common shareowners				221	25	246



Alliant Energy					ATC Holdings,	Alliant
	Utility				Non-Utility,	Energy
	Electric	Gas	Other	Total	Parent and Other	Consolidated
	(in millions)
Nine Months Ended September 30, 2021
Revenues	$2,357	$289	$36	$2,682	$60	$2,742
Operating income (loss)	601	42	(4)	639	24	663



Net income attributable to Alliant Energy common shareowners				537	34	571
Nine Months Ended September 30, 2020
Revenues	$2,257	$253	$32	$2,542	$57	$2,599
Operating income	549	48	5	602	26	628



Net income attributable to Alliant Energy common shareowners				510	40	550


IPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended September 30, 2021
Revenues	$555	$31	$13	$599
Operating income (loss)	186	(3)	(3)	180
Net income available for common stock				157
Three Months Ended September 30, 2020
Revenues	$519	$24	$10	$553
Operating income	159	1	2	162
Net income available for common stock				148
Nine Months Ended September 30, 2021
Revenues	$1,343	$165	$35	$1,543
Operating income (loss)	365	30	(1)	394
Net income available for common stock				322
Nine Months Ended September 30, 2020
Revenues	$1,332	$141	$31	$1,504
Operating income	308	34	5	347
Net income available for common stock				290


WPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended September 30, 2021
Revenues	$384	$19	$—	$403
Operating income (loss)	104	(2)	(2)	100
Net income				93
Three Months Ended September 30, 2020
Revenues	$333	$18	$—	$351
Operating income (loss)	92	(2)	(1)	89
Net income				73
Nine Months Ended September 30, 2021
Revenues	$1,014	$124	$1	$1,139
Operating income (loss)	236	12	(3)	245
Net income				215
Nine Months Ended September 30, 2020
Revenues	$925	$112	$1	$1,038
Operating income	241	14	—	255
Net income				220

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8924-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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+ Details