Segment Information - Additional Information (Details)	6 Months Ended
Jun. 30, 2026 Segment
Segment Reporting [Abstract]
Number of operating segments	1
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	srt:ChiefExecutiveOfficerMember
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description	The Company’s chief operating decision maker, its Chief Executive Officer, manages the Company’s operations on a consolidated basis for the purposes of assessing performance and allocating resources based on net loss attributable to Generate Biomedicines, Inc. stockholders that also is reported on the consolidated statement of operations as consolidated net loss to Generate Biomedicines, Inc. stockholders
Segment Reporting, Expense Information Used by CODM, Description	This financial metric is used by the chief operating decision maker ("CODM") to make key operating decisions such as the allocation of capital between program expenses, early-stage discovery expenses, and general and administrative expense, including headcount and facilities decisions. The operating segment’s revenue is derived from multiple collaboration agreements from which the segment licenses certain development or product candidates and performs research and development services. The measure of segment assets is reported on the balance sheet as total consolidated assets. All of the Company’s long-lived assets are held in the United States.

Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]

srt:ChiefExecutiveOfficerMember

Segment Reporting, Expense Information Used by CODM, Description

This financial metric is used by the chief operating decision maker ("CODM") to make key operating decisions such as the allocation of capital between program expenses, early-stage discovery expenses, and general and administrative expense, including headcount and facilities decisions. The operating segment’s revenue is derived from multiple collaboration agreements from which the segment licenses certain development or product candidates and performs research and development services. The measure of segment assets is reported on the balance sheet as total consolidated assets. All of the Company’s long-lived assets are held in the United States.