Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Feb. 26, 2025	Jun. 30, 2024
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	814-01332
Entity Registrant Name	Morgan Stanley Direct Lending Fund
Entity Incorporation, State or Country Code	DE
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	212
Local Phone Number	761-4000
Title of 12(b) Security	Common Stock, $0.001 par value per share
Trading Symbol	MSDL
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 1,736
Entity Common Stock, Shares Outstanding		88,499,688
Documents Incorporated by Reference [Text Block]	Portions of the registrant’s Proxy Statement for its 2025 annual meeting of stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K.
Entity Central Index Key	0001782524
Amendment Flag	false
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2024