v3.25.2
N-2
Sep. 11, 2025
$ / shares
Cover [Abstract]  
Entity Central Index Key 0001588272
Amendment Flag false
Securities Act File Number 814-01074
Document Type 8-K
Entity Registrant Name NEXPOINT CAPITAL, INC.
Entity Address, Address Line One 300 Crescent Court
Entity Address, Address Line Two Suite 700
Entity Address, City or Town Dallas
Entity Address, State or Province TX
Entity Address, Postal Zip Code 75201
City Area Code 972
Local Phone Number 934-4700
Entity Emerging Growth Company false
General Description of Registrant [Abstract]  
NAV Per Share $ 4.71