ORGANIZATION AND BASIS OF PRESENTATION - Additional Information (Details) $ / shares in Units, $ in Billions			12 Months Ended
	Sep. 30, 2019 USD ($) $ / shares shares	Mar. 13, 2019	Dec. 31, 2019 entity partnership_interest vote	Oct. 01, 2019 USD ($) entity
Subsidiary, Sale of Stock [Line Items]
Ownership interest (as a percent)			100.00%
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 limited partnership interests | partnership_interest			1
Number of former indirect subsidiaries | entity				4
Number of indirect subsidiaries | entity			2	2
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 USD 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. | Brookfield Merger Agreement
Subsidiary, Sale of Stock [Line Items]
Percentage of business owned by OCGH	38.80%