{"cik":2021880,"taxonomy":"us-gaap","tag":"Assets","label":"Assets","description":"Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.","entityName":"HMH Holding Inc","units":{"USD":[{"end":"2025-12-31","val":10,"accn":"0001628280-26-031295","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-06"},{"end":"2025-12-31","val":1357704000,"accn":"0001628280-26-053385","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-05","frame":"CY2025Q4I"},{"end":"2026-03-31","val":10,"accn":"0001628280-26-031295","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-06","frame":"CY2026Q1I"},{"end":"2026-06-30","val":1362565000,"accn":"0001628280-26-053385","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-05","frame":"CY2026Q2I"}]}}