{"cik":2128045,"taxonomy":"us-gaap","tag":"AllocatedShareBasedCompensationExpense","label":"Share-based Payment Arrangement, Expense","description":"Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.","entityName":"Bleichroeder Acquisition Corp. III","units":{"USD":[{"end":"2026-06-16","val":2015750,"accn":"0001213900-26-090096","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-14","frame":"CY2026Q2I"}]}}