v3.25.1
Document and Entity Information
Apr. 17, 2025
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001860424
Document Type 8-K
Document Period End Date Apr. 17, 2025
Entity Registrant Name Onex Direct Lending BDC Fund
Entity Incorporation State Country Code DE
Entity File Number 814-01405
Entity Tax Identification Number 86-3687484
Entity Address, Address Line One 930 Sylvan Avenue
Entity Address, City or Town Englewood Cliffs
Entity Address, State or Province NJ
Entity Address, Postal Zip Code 07632
City Area Code (201)
Local Phone Number 541-2121
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Entity Ex Transition Period false