v3.25.2
Significant Accounting Policies - Additional Information (Detail)
shares in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
shares
Mar. 31, 2025
USD ($)
Jun. 30, 2024
USD ($)
shares
Jun. 30, 2025
USD ($)
Segment
shares
Jun. 30, 2024
USD ($)
shares
Significant Accounting Policies [Line Items]          
Deferred revenue payment terms       30 days  
Number of reporting segment       1  
Number of operating segment       1  
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]       srt:ChiefExecutiveOfficerMember  
Impairment charge | $ $ 382,248,000 $ 459,100,000 $ 0 $ 841,348,000 $ 0
Informa TechTarget [Member]          
Significant Accounting Policies [Line Items]          
Number of reporting segment       1  
Number of operating segment       1  
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]       srt:ChiefExecutiveOfficerMember  
Impairment of long-lived assets | $       $ 0  
Restricted Stock Units (RSUs) [Member]          
Significant Accounting Policies [Line Items]          
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares 1.4   0.0 1.4 0.0