Segment Information - Additional Information (Detail)	12 Months Ended
Segment Information - Additional Information (Detail)	Dec. 31, 2025 Segment
Segment Reporting [Abstract]
Segment Reporting, Expense Information Used by CODM, Description	This presentation is consistent with how the Company’s chief operating decision maker (“CODM”), its Chief Executive Officer, assesses the performance of the Company and makes operating decisions on a consolidated basis. The accounting policies of the consolidated segment are the same as those described in the summary of significant accounting policies (see Note 2). The CODM assesses performance and decides how to allocate resources based on consolidated net loss as reported on the consolidated statements of operations and comprehensive loss. The CODM uses consolidated net loss to monitor budget versus actual results, assess cash runway, and benchmark against the Company’s competitors. The measure of segment assets is reported on the consolidated balance sheets as total assets. The Company’s 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, Type [Extensible Enumeration]	us-gaap:SegmentReportingExpenseInformationUsedByCodmConsolidatedMember
Number of reportable segments	1

Nuvalent, Inc. 10-K