EQUITY AND REDEEMABLE INTEREST - Common Stock Offering (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Class of Stock [Line Items]
AOG units (in shares)	289,874,333		289,874,333		259,630,180
Ares Operating Group
Class of Stock [Line Items]
Direct Ownership Interest	100.00%		100.00%		100.00%
Ares Owners Holdings, L.P.
Class of Stock [Line Items]
AOG units (in shares)	118,803,257		118,803,257		112,447,618
Ares Owners Holdings, L.P. | Ares Operating Group
Class of Stock [Line Items]
Direct Ownership Interest	40.98%		40.98%		43.31%
Daily Average Ownership	41.50%	44.43%	41.74%	46.67%
Ares Operating Group
Class of Stock [Line Items]
AOG units (in shares)	171,071,076		171,071,076		147,182,562
Ares Operating Group | Ares Operating Group
Class of Stock [Line Items]
Direct Ownership Interest	59.02%		59.02%		56.69%
Daily Average Ownership	58.50%	55.57%	58.26%	53.33%