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v3.23.1

Segments Of Business | 3 Months Ended
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Mar. 31, 2023
Segment Reporting Information [Line Items] |
Segments Of Business | 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, 2023 |  |  |  |  |  |  |  |  |  |  |
Revenues | $768 |  | $276 |  | $11 |  | $1,055 |  | $22 |  | $1,077
Operating income | 163 |  | 50 |  | 4 |  | 217 |  | 5 |  | 222
Net income attributable to Alliant Energy common shareowners |  |  |  |  |  |  | 160 |  | 3 |  | 163
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
IPL | Electric |  | Gas |  | Other |  | Total
| (in millions)
Three Months Ended March 31, 2023 |  |  |  |  |  |  |
Revenues | $388 |  | $150 |  | $11 |  | $549
Operating income | 66 |  | 27 |  | 3 |  | 96
Net income |  |  |  |  |  |  | 72
Three Months Ended March 31, 2022 |  |  |  |  |  |  |
Revenues | $400 |  | $139 |  | $11 |  | $550
Operating income | 75 |  | 32 |  | 3 |  | 110
Net income |  |  |  |  |  |  | 87
WPL | Electric |  | Gas |  | Other |  | Total
| (in millions)
Three Months Ended March 31, 2023 |  |  |  |  |  |  |
Revenues | $380 |  | $126 |  | $— |  | $506
Operating income | 97 |  | 23 |  | 1 |  | 121
Net income |  |  |  |  |  |  | 88
Three Months Ended March 31, 2022 |  |  |  |  |  |  |
Revenues | $373 |  | $123 |  | $— |  | $496
Operating income | 106 |  | 25 |  | — |  | 131
Net income |  |  |  |  |  |  | 92
IPL [Member] |
Segment Reporting Information [Line Items] |
Segments Of Business | 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, 2023 |  |  |  |  |  |  |  |  |  |  |
Revenues | $768 |  | $276 |  | $11 |  | $1,055 |  | $22 |  | $1,077
Operating income | 163 |  | 50 |  | 4 |  | 217 |  | 5 |  | 222
Net income attributable to Alliant Energy common shareowners |  |  |  |  |  |  | 160 |  | 3 |  | 163
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
IPL | Electric |  | Gas |  | Other |  | Total
| (in millions)
Three Months Ended March 31, 2023 |  |  |  |  |  |  |
Revenues | $388 |  | $150 |  | $11 |  | $549
Operating income | 66 |  | 27 |  | 3 |  | 96
Net income |  |  |  |  |  |  | 72
Three Months Ended March 31, 2022 |  |  |  |  |  |  |
Revenues | $400 |  | $139 |  | $11 |  | $550
Operating income | 75 |  | 32 |  | 3 |  | 110
Net income |  |  |  |  |  |  | 87
WPL | Electric |  | Gas |  | Other |  | Total
| (in millions)
Three Months Ended March 31, 2023 |  |  |  |  |  |  |
Revenues | $380 |  | $126 |  | $— |  | $506
Operating income | 97 |  | 23 |  | 1 |  | 121
Net income |  |  |  |  |  |  | 88
Three Months Ended March 31, 2022 |  |  |  |  |  |  |
Revenues | $373 |  | $123 |  | $— |  | $496
Operating income | 106 |  | 25 |  | — |  | 131
Net income |  |  |  |  |  |  | 92
WPL [Member] |
Segment Reporting Information [Line Items] |
Segments Of Business | 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, 2023 |  |  |  |  |  |  |  |  |  |  |
Revenues | $768 |  | $276 |  | $11 |  | $1,055 |  | $22 |  | $1,077
Operating income | 163 |  | 50 |  | 4 |  | 217 |  | 5 |  | 222
Net income attributable to Alliant Energy common shareowners |  |  |  |  |  |  | 160 |  | 3 |  | 163
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
IPL | Electric |  | Gas |  | Other |  | Total
| (in millions)
Three Months Ended March 31, 2023 |  |  |  |  |  |  |
Revenues | $388 |  | $150 |  | $11 |  | $549
Operating income | 66 |  | 27 |  | 3 |  | 96
Net income |  |  |  |  |  |  | 72
Three Months Ended March 31, 2022 |  |  |  |  |  |  |
Revenues | $400 |  | $139 |  | $11 |  | $550
Operating income | 75 |  | 32 |  | 3 |  | 110
Net income |  |  |  |  |  |  | 87
WPL | Electric |  | Gas |  | Other |  | Total
| (in millions)
Three Months Ended March 31, 2023 |  |  |  |  |  |  |
Revenues | $380 |  | $126 |  | $— |  | $506
Operating income | 97 |  | 23 |  | 1 |  | 121
Net income |  |  |  |  |  |  | 88
Three Months Ended March 31, 2022 |  |  |  |  |  |  |
Revenues | $373 |  | $123 |  | $— |  | $496
Operating income | 106 |  | 25 |  | — |  | 131
Net income |  |  |  |  |  |  | 92

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