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Submission
Sep. 22, 2025
Submission [Line Items]  
Central Index Key 0000352541
Registrant Name ALLIANT ENERGY CORP
Registration File Number 333-276062
Form Type S-3
Submission Type POSASR
Fee Exhibit Type EX-FILING FEES
Offset Table N/A N/A
Combined Prospectus Table N/A N/A