v3.25.1
Cover - shares
3 Months Ended
Mar. 31, 2025
May 06, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2025  
Document Transition Report false  
Securities Act File Number 814-01044  
Entity Registrant Name TriplePoint Venture Growth BDC Corp.  
Entity Incorporation, State or Country Code MD  
Entity Tax Identification Number 46-3082016  
Entity Address, Address Line One 2755 Sand Hill Road  
Entity Address, Address Line Two Suite 150  
Entity Address, City or Town Menlo Park  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94025  
City Area Code 650  
Local Phone Number 854-2090  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol TPVG  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   40,232,829
Amendment Flag false  
Entity Central Index Key 0001580345  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1