EQUITY BASED COMPENSATION (Details 2) $ / shares in Units, $ in Millions		6 Months Ended
	Feb. 19, 2014 shares	Jun. 30, 2015 USD ($) $ / shares shares
Equity Incentive Plan Units
Equity Based Payments
Total awards issuable as a percentage of diluted common units outstanding		15.00%
Minimum transfer restriction period with respect to one-half awards vested		1 year
Portion of awards vested having one-year transfer restriction period		50.00%
Minimum transfer restriction period with respect to remaining one-half awards vested		2 years
Portion of awards vested having two-year transfer restriction period		0.5
Minimum retained ownership required to continuously hold common unit equivalents to as percentage of cumulatively vested interests		15.00%
Maximum forfeiture rate assumed (as a percent)		8.00%
Weighted average remaining vesting period over which unvested units are expected to vest (in years) (less than)		1 year 4 months 24 days
Estimated unrecognized equity-based payment expense | $		$ 310.5
Units
Balance at the beginning of the period (in units)		20,488,737
Granted (in units)		15,619,776
Vested (in units)		(5,174,042)
Forfeited (in units)		(1,485,752)
Balance at the end of the period (in units)		29,448,719
Weighted Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per unit) | $ / shares		$ 12.33
Granted (in dollars per unit) | $ / shares		17.01
Vested (in dollars per unit) | $ / shares		12.93
Forfeited (in dollars per unit) | $ / shares		14.27
Balance at the end of the period (in dollars per unit) | $ / shares		$ 14.61
Equity Incentive Plan Units | Remainder of 2015
Equity Based Payments
Estimated unrecognized equity-based payment expense | $		$ 84.5
Equity Incentive Plan Units | 2016
Equity Based Payments
Estimated unrecognized equity-based payment expense | $		130.8
Equity Incentive Plan Units | 2017
Equity Based Payments
Estimated unrecognized equity-based payment expense | $		75.8
Equity Incentive Plan Units | 2018
Equity Based Payments
Estimated unrecognized equity-based payment expense | $		18.8
Equity Incentive Plan Units | 2019
Equity Based Payments
Estimated unrecognized equity-based payment expense | $		$ 0.6
Equity Incentive Plan Units | Minimum
Equity Based Payments
Vesting period (in years)		3 years
Discount rate (as a percent)		8.00%
Equity Incentive Plan Units | Maximum
Equity Based Payments
Vesting period (in years)		5 years
Discount rate (as a percent)		56.00%
Principal's equity based awards
Units
Balance at the end of the period (in units)		3,518,744
Other Exchangeable Securities
Equity Based Payments
Vesting period (in years)		3 years
Maximum forfeiture rate assumed (as a percent)		8.00%
Weighted average remaining vesting period over which unvested units are expected to vest (in years) (less than)		1 year
Common units conversion basis		1
Estimated unrecognized equity-based payment expense | $		$ 16.3
Units
Balance at the beginning of the period (in units)		1,695,972
Granted (in units)	2,545,602	0
Vested (in units)		0
Forfeited (in units)		0
Balance at the end of the period (in units)		1,695,972
Weighted Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per unit) | $ / shares		$ 18.45
Granted (in dollars per unit) | $ / shares		0.00
Vested (in dollars per unit) | $ / shares		0.00
Forfeited (in dollars per unit) | $ / shares		0.00
Balance at the end of the period (in dollars per unit) | $ / shares		$ 18.45
Other Exchangeable Securities | Remainder of 2015
Equity Based Payments
Estimated unrecognized equity-based payment expense | $		$ 6.8
Other Exchangeable Securities | 2016
Equity Based Payments
Estimated unrecognized equity-based payment expense | $		$ 9.5
Other Exchangeable Securities | Minimum
Equity Based Payments
Discount rate (as a percent)		8.00%
Other Exchangeable Securities | Maximum
Equity Based Payments
Discount rate (as a percent)		56.00%
KKR Holdings | Principal's equity based awards
Equity Based Payments
Minimum transfer restriction period with respect to one-half awards vested		1 year
Portion of awards vested having one-year transfer restriction period		50.00%
Minimum transfer restriction period with respect to remaining one-half awards vested		2 years
Portion of awards vested having two-year transfer restriction period		0.5
Maximum forfeiture rate assumed (as a percent)		8.00%
Weighted average remaining vesting period over which unvested units are expected to vest (in years) (less than)		1 year
Common units conversion basis		1
Number of common units owned in KKR Group Partnership Units (in units)		367,486,829
Minimum retained ownership requirement (as a percent)		25.00%
Allocation of awards not communicated to principals (in units)		34,985,912
Estimated unrecognized equity-based payment expense | $		$ 5.3
Units
Balance at the beginning of the period (in units)		4,708,434
Granted (in units)		74,247
Vested (in units)		(1,090,262)
Forfeited (in units)		(173,675)
Balance at the end of the period (in units)		3,518,744
Weighted Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per unit) | $ / shares		$ 8.44
Granted (in dollars per unit) | $ / shares		16.64
Vested (in dollars per unit) | $ / shares		9.50
Forfeited (in dollars per unit) | $ / shares		8.55
Balance at the end of the period (in dollars per unit) | $ / shares		$ 8.28
KKR Holdings | Principal's equity based awards | Remainder of 2015
Equity Based Payments
Estimated unrecognized equity-based payment expense | $		$ 2.8
KKR Holdings | Principal's equity based awards | 2016
Equity Based Payments
Estimated unrecognized equity-based payment expense | $		2.1
KKR Holdings | Principal's equity based awards | 2017
Equity Based Payments
Estimated unrecognized equity-based payment expense | $		$ 0.4
KKR Holdings | Principal's equity based awards | Minimum
Equity Based Payments
Vesting period (in years)		3 years
Discount rate (as a percent)		8.00%
Percentage of units vested on fulfillment of performance-based vesting conditions		0.00%
KKR Holdings | Principal's equity based awards | Maximum
Equity Based Payments
Vesting period (in years)		5 years
Discount rate (as a percent)		56.00%
Percentage of units vested on fulfillment of performance-based vesting conditions		100.00%
October 1, 2015 | Equity Incentive Plan Units
Units
Balance at the end of the period (in units)		5,528,873
October 1, 2015 | Principal's equity based awards
Units
Balance at the end of the period (in units)		2,047,319
October 1, 2015 | Other Exchangeable Securities
Units
Balance at the end of the period (in units)		847,983
April 1, 2016 | Equity Incentive Plan Units
Units
Balance at the end of the period (in units)		7,384,714
April 1, 2016 | Principal's equity based awards
Units
Balance at the end of the period (in units)		122,697
October 1, 2016 | Equity Incentive Plan Units
Units
Balance at the end of the period (in units)		4,397,839
October 1, 2016 | Principal's equity based awards
Units
Balance at the end of the period (in units)		1,127,413
October 1, 2016 | Other Exchangeable Securities
Units
Balance at the end of the period (in units)		847,989
April 1, 2017 | Equity Incentive Plan Units
Units
Balance at the end of the period (in units)		5,476,479
April 1, 2017 | Principal's equity based awards
Units
Balance at the end of the period (in units)		70,271
October 1, 2017 | Equity Incentive Plan Units
Units
Balance at the end of the period (in units)		1,403,838
October 1, 2017 | Principal's equity based awards
Units
Balance at the end of the period (in units)		111,293
April 1, 2018 | Equity Incentive Plan Units
Units
Balance at the end of the period (in units)		4,118,901
April 1, 2018 | Principal's equity based awards
Units
Balance at the end of the period (in units)		39,751
October 1, 2018 | Equity Incentive Plan Units
Units
Balance at the end of the period (in units)		1,047,478
April 1, 2019 | Equity Incentive Plan Units
Units
Balance at the end of the period (in units)		6,947
October 1, 2019 | Equity Incentive Plan Units
Units
Balance at the end of the period (in units)		83,650
KKR Group Partnerships
Equity Based Payments
Percentage owned by KKR Holdings		45.00%