Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

No definition available.

Name:	dei_AmendmentFlag
Namespace Prefix:	dei_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration

- Definition

PCAOB issued Audit Firm Identifier

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form 10-K
-Number 249
-Section 310

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form 20-F
-Number 249
-Section 220
-Subsection f

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form 40-F
-Number 249
-Section 240
-Subsection f

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
Document and Entity Information - USD ($) $ in Millions	Dec. 31, 2024	Feb. 12, 2025	Jun. 30, 2024
Entity Registrant Name	Moelis & Co
Entity Central Index Key	0001596967
Document Type	10-K
Document Period End Date	Dec. 31, 2024
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Interactive Data Current	Yes
Document Financial Statement Error Correction [Flag]	false
Entity Public Float			$ 3,989
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Trading Symbol	MC
Entity File Number	001-36418
Entity Tax Identification Number	46-4500216
Entity Address, Address Line One	399 Park Avenue
Entity Address, Address Line Two	4th Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10022
City Area Code	212
Local Phone Number	883-3800
Title of 12(b) Security	Class A common stock
Security Exchange Name	NYSE
Entity Incorporation, State or Country Code	DE
Document Annual Report	true
Document Transition Report	false
Documents Incorporated by Reference	Portions of the Registrant’s definitive proxy statement for its 2025 annual meeting of stockholders are incorporated by reference in Part III of this Form 10‑K.
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	New York, NY
Auditor Opinion	Opinion on the Financial Statements We have audited the accompanying consolidated statements of financial condition of Moelis & Company and subsidiaries (the “Company”) as of December 31, 2024 and 2023, the related consolidated statements of operations, comprehensive income, cash flows and changes in equity, for each of the three years in the period ended December 31, 2024, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2024, in conformity with accounting principles generally accepted in the United States of America. We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 27, 2025, expressed an unqualified opinion on the Company’s internal control over financial reporting.
Class A Common Stock
Entity Common Stock, Shares Outstanding		70,609,982
Class B Common Stock
Entity Common Stock, Shares Outstanding		4,331,619