Cover	6 Months Ended
	Jun. 30, 2023 shares
Cover [Abstract]
Document Type	10-Q
Document Period End Date	Jun. 30, 2023
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	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Shell Company	false
Amendment Flag	false
Entity Central Index Key	0001580345
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Document Transition Report	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding	35,446,752
Document Annual Report	true