Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Feb. 26, 2020	Jun. 28, 2019
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	001-35500
Entity Registrant Name	Oaktree Capital Group, LLC
Entity Central Index Key	0001403528
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-0174894
Entity Address, Address Line One	333 South Grand Avenue
Entity Address, Address Line Two	28th Floor
Entity Address, City or Town	Los Angeles
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90071
City Area Code	213
Local Phone Number	830-6300
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
Entity Shell Company	false
Entity Public Float			$ 0
Documents Incorporated by Reference	None
6.625% Series A preferred units
Entity Information [Line Items]
Title of 12(b) Security	6.625% Series A preferred units
Trading Symbol	OAK-A
Security Exchange Name	NYSE
6.550% Series B preferred units
Entity Information [Line Items]
Title of 12(b) Security	6.550% Series B preferred units
Trading Symbol	OAK-B
Security Exchange Name	NYSE
Class B Units
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		61,816,685
Class A Units
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		97,967,255