EQUITY - Net Income (Loss) Attributable To Noncontrolling Interests Held by KKR Holdings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net income (loss)	$ 5,117,598	$ 4,639,540	$ 2,450,946
Less Net income (loss) attributable to Redeemable Noncontrolling Interests	0	0	(37,352)
Less Net income (loss) attributable to Noncontrolling Interests in consolidated entities	1,907,155	1,264,820	796,183
Plus Income tax expense (benefit) attributable to KKR & Co. Inc.	545,546	539,466	(229,232)
Net income (loss) attributable to KKR & Co. Inc. Common Stockholders and KKR Holdings	3,699,434	3,880,822	1,429,519
Series A And Series B Preferred Stock
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Less Preferred Stock Dividends	33,364	33,364	33,364
Series C Mandatory Convertible Preferred Stock Dividends
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Less Preferred Stock Dividends	23,191	0	0
KKR Holdings
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net income (loss) attributable to Noncontrolling Interests held by KKR Holdings	$ 1,207,934	$ 1,369,671	$ 561,052