DEBT OBLIGATIONS AND CREDIT FACILITIES - Debt Obligations (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Senior secured notes
Debt Instrument [Line Items]
Total remaining principal	$ 218,260,000	$ 220,931,000
Oaktree Capital Group Excluding Consolidated Funds
Debt Instrument [Line Items]
Total remaining principal	1,050,000,000	1,050,000,000
Oaktree Capital Group Excluding Consolidated Funds | Senior secured notes | $50,000, 3.91%, issued in September 2014, payable on September 3, 2024
Debt Instrument [Line Items]
Face amount	$ 50,000
Stated percentage	3.91%
Total remaining principal	$ 50,000,000	50,000,000
Oaktree Capital Group Excluding Consolidated Funds | Senior secured notes | $100,000, 4.01%, issued in September 2014, payable on September 3, 2026
Debt Instrument [Line Items]
Face amount	$ 100,000
Stated percentage	4.01%
Total remaining principal	$ 100,000,000	100,000,000
Oaktree Capital Group Excluding Consolidated Funds | Senior secured notes | $100,000, 4.21%, issued in September 2014, payable on September 3, 2029
Debt Instrument [Line Items]
Face amount	$ 100,000
Stated percentage	4.21%
Total remaining principal	$ 100,000,000	100,000,000
Oaktree Capital Group Excluding Consolidated Funds | Senior secured notes | $100,000, 3.69%, issued in July 2016, payable on July 12, 2031
Debt Instrument [Line Items]
Face amount	$ 100,000
Stated percentage	3.69%
Total remaining principal	$ 100,000,000	100,000,000
Oaktree Capital Group Excluding Consolidated Funds | Senior secured notes | $250,000, 3.78%, issued in December 2017, payable on December 18, 2032
Debt Instrument [Line Items]
Face amount	$ 250,000
Stated percentage	3.78%
Total remaining principal	$ 250,000,000	250,000,000
Oaktree Capital Group Excluding Consolidated Funds | Senior secured notes | $200,000, 3.64%, issued in July 2020, payable on July 22, 2030
Debt Instrument [Line Items]
Face amount	$ 200,000
Stated percentage	3.64%
Total remaining principal	$ 200,000,000	200,000,000
Oaktree Capital Group Excluding Consolidated Funds | Senior secured notes | $50,000, 3.84%, issued in July 2020, payable on July 22, 2035
Debt Instrument [Line Items]
Face amount	$ 50,000
Stated percentage	3.84%
Total remaining principal	$ 50,000,000	50,000,000
Oaktree Capital Group Excluding Consolidated Funds | Senior secured notes | $200,000, 3.06%, issued in January 2022, payable on January 12, 2037
Debt Instrument [Line Items]
Face amount	$ 200,000
Stated percentage	3.06%
Total remaining principal	$ 200,000,000	$ 200,000,000