{"cik":2021880,"taxonomy":"us-gaap","tag":"DeferredIncomeTaxLiabilitiesNet","label":"Deferred Income Tax Liabilities, Net","description":"Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.","entityName":"HMH Holding Inc","units":{"USD":[{"end":"2025-12-31","val":17404000,"accn":"0001628280-26-053385","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-05","frame":"CY2025Q4I"},{"end":"2026-06-30","val":20982000,"accn":"0001628280-26-053385","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-05","frame":"CY2026Q2I"}]}}