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Common Equity (Tables) | 12 Months Ended
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Dec. 31, 2024
Schedule of Common Equity [Line Items] |
Common Stock Activity | A summary of Alliant Energy’s common stock activity was as follows:
| 2024 |  | 2023 |  | 2022
Shares outstanding, January 1 | 256,096,848 |  |  | 251,134,966 |  |  | 250,474,529 |
At-the-market offering program | — |  |  | 4,372,561 |  |  | — |
Shareowner Direct Plan | 439,107 |  |  | 454,987 |  |  | 437,669 |
Equity-based compensation plans | 154,267 |  |  | 134,334 |  |  | 222,768 |
Shares outstanding, December 31 | 256,690,222 |  |  | 256,096,848 |  |  | 251,134,966 |

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- Definition Tabular disclosure of an entity's capital units or capital shares, including the value of capital units or capital shares, units authorized, units outstanding and other information necessary to a fair presentation. + References No definition available. + Details
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