EQUITY BASED COMPENSATION - Awards Rollforward (Details)	3 Months Ended
	Mar. 31, 2019 $ / shares shares
KKR Holdings Principal Awards
Shares
Balance at the beginning of the period (in units) | shares	24,123,993
Granted (in units) | shares	0
Vested (in units) | shares	0
Forfeitures (in units) | shares	(270,000)
Balance at the end of the period (in units) | shares	23,853,993
Weighted Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per unit) | $ / shares	$ 14.42
Granted (in dollars per unit) | $ / shares	0.00
Vested (in dollars per unit) | $ / shares	0.00
Forfeitures (in dollars per unit) | $ / shares	16.28
Balance at the end of the period (in dollars per unit) | $ / shares	$ 14.40
Equity Incentive Plan Shares
Shares
Balance at the beginning of the period (in units) | shares	33,400,183
Granted (in units) | shares	50,511
Vested (in units) | shares	(15,440)
Forfeitures (in units) | shares	(604,519)
Balance at the end of the period (in units) | shares	32,830,735
Weighted Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per unit) | $ / shares	$ 16.23
Granted (in dollars per unit) | $ / shares	18.96
Vested (in dollars per unit) | $ / shares	15.83
Forfeitures (in dollars per unit) | $ / shares	17.43
Balance at the end of the period (in dollars per unit) | $ / shares	$ 16.21