{"cik":52485,"taxonomy":"us-gaap","tag":"LiabilitiesCurrent","label":"Liabilities, Current","description":"Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.","entityName":"ALLIANT ENERGY CORP","units":{"USD":[{"end":"2025-12-31","val":2123000000,"accn":"0000352541-26-000043","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-07-31","frame":"CY2025Q4I"},{"end":"2026-06-30","val":2574000000,"accn":"0000352541-26-000043","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-07-31","frame":"CY2026Q2I"}]}}