{"cik":2065708,"taxonomy":"us-gaap","tag":"LiabilitiesAndStockholdersEquity","label":"Liabilities and Equity","description":"Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.","entityName":"Andersen Group Inc.","units":{"USD":[{"end":"2024-12-31","val":398687000,"accn":"0001193125-26-128949","fy":2025,"fp":"FY","form":"10-K","filed":"2026-03-27","frame":"CY2024Q4I"},{"end":"2025-12-31","val":565140000,"accn":"0001193125-26-128949","fy":2025,"fp":"FY","form":"10-K","filed":"2026-03-27"},{"end":"2025-12-31","val":565140000,"accn":"0001193125-26-219544","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-12","frame":"CY2025Q4I"},{"end":"2026-03-31","val":608570000,"accn":"0001193125-26-219544","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-12","frame":"CY2026Q1I"}]}}