{"cik":2021880,"taxonomy":"us-gaap","tag":"ShareBasedCompensation","label":"Share-based Payment Arrangement, Noncash Expense","description":"Amount of noncash expense for share-based payment arrangement.","entityName":"HMH Holding Inc","units":{"USD":[{"start":"2025-01-01","end":"2025-06-30","val":0,"accn":"0001628280-26-053385","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-05"},{"start":"2026-01-01","end":"2026-06-30","val":22775000,"accn":"0001628280-26-053385","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-05"},{"start":"2026-04-01","end":"2026-06-30","val":22800000,"accn":"0001628280-26-053385","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-05","frame":"CY2026Q2"}]}}