| Document and Entity Information | Nov. 07, 2024 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001782524 |
| Document Type | 8-K |
| Document Period End Date | Nov. 07, 2024 |
| Entity Registrant Name | Morgan Stanley Direct Lending Fund |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 814-01332 |
| Entity Tax Identification Number | 84-2009506 |
| Entity Address, Address Line One | 1585 Broadway |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10036 |
| City Area Code | 1 (212) |
| Local Phone Number | 761-4000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $0.001 per share |
| Trading Symbol | MSDL |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
