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v3.23.1

Investments | 3 Months Ended
--- | ---
Mar. 31, 2023
Schedule of Equity Method Investments [Line Items] |
Investments | INVESTMENTS Unconsolidated Equity Investments - Alliant Energy’s equity (income) loss from unconsolidated investments accounted for under the equity method of accounting for the three months ended March 31 was as follows (in millions):
| 2023 |  | 2022 |  |  |  |
ATC Holdings | ($13) |  | ($11) |  |  |  |
Other | (4) |  | (4) |  |  |  |
| ($17) |  | ($15) |  |  |  |

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