| Document and Entity Information | May 01, 2020 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001403528 |
| Document Type | 8-K |
| Document Period End Date | May 1, 2020 |
| Entity Registrant Name | Oaktree Capital Group, LLC |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-35500 |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Preferred Class A [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 6.625% Series A preferred units |
| Trading Symbol | OAK-A |
| Security Exchange Name | NYSE |
| Preferred Class B [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 6.550% Series B preferred units |
| Trading Symbol | OAK-B |
| Security Exchange Name | NYSE |
