ORGANIZATION AND BASIS OF PRESENTATION (Details) $ / shares in Units, $ in Billions		9 Months Ended
	Sep. 30, 2019 USD ($) entity $ / shares shares	Sep. 30, 2020 entity vote partnership_interest	Oct. 01, 2019 USD ($) entity
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of votes per class A unit | vote		1
Number of votes per class B unit | vote		10
Number Operating Group entities | entity	6	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 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
OCGH
Subsidiary, Sale of Stock [Line Items]
Limited liability company (LLC) ownership interest		100.00%
OCGH | Brookfield Merger Agreement
Subsidiary, Sale of Stock [Line Items]
Percentage of business owned by OCGH	38.80%
Brookfield | Brookfield Merger Agreement
Subsidiary, Sale of Stock [Line Items]
Percentage of business acquired by Brookfield	61.20%
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]
Stock conversion ratio	1