ORGANIZATION AND BASIS OF PRESENTATION - Additional Information (Details) $ / shares in Units, $ in Billions		12 Months Ended
	Sep. 30, 2019 $ / shares shares	Dec. 31, 2021 entity vote partnership_interest	Sep. 30, 2021 USD ($)	Oct. 01, 2019 USD ($) entity
Subsidiary, Sale of Stock [Line Items]
Number of votes per class A unit | vote		1
Number of votes per class B unit | vote		10
Number of operating entities | entity		6		6
Number of indirect subsidiaries | entity		2		2
Number of limited partnership interests | partnership_interest		1
Number of former indirect subsidiaries | entity		4		4
Deconsolidation, total assets transferred				$ 1.7
Deconsolidation, total liabilities transferred				1.2
Deconsolidation, total unitholders capital transferred				$ 0.5
Brookfield Asset Management Inc. Merger Agreement, OCGH Unitholders
Subsidiary, Sale of Stock [Line Items]
OSC class A, cash consideration (in dollars per share) | $ / shares	$ 49.00
Shares of Brookfield issued (in shares) | shares	1.0770
Cash pro ration	50.00%
Aggregate amount of cash payable to unitholders			$ 2.4
Class A Units | Brookfield Asset Management Inc. Merger Agreement, OCGH Unitholders
Subsidiary, Sale of Stock [Line Items]
Share pro ration	20.00%
Number of shares issued during mergers (in shares) | shares	52,800,000
Converted OCGH Units | Brookfield Asset Management Inc. Merger Agreement, OCGH Unitholders
Subsidiary, Sale of Stock [Line Items]
Number of unvested shares converted during mergers (in shares) | shares	1
Brookfield Asset Management Inc. | Brookfield Merger Agreement
Subsidiary, Sale of Stock [Line Items]
Percentage of business acquired by Brookfield	61.20%
Oaktree Capital Group Holdings, L.P.
Subsidiary, Sale of Stock [Line Items]
Ownership interest (as a percent)		100.00%
Oaktree Capital Group Holdings, L.P. | Brookfield Merger Agreement
Subsidiary, Sale of Stock [Line Items]
Percentage of business owned by OCGH	38.80%