EQUITY BASED COMPENSATION - Remaining Vesting Tranches (Details) - Asset Management - shares	Jun. 30, 2021	Dec. 31, 2020
KKR Equity Incentive Plans
Equity Based Payments
Principal units (in shares)	18,485,229
KKR Equity Incentive Plans | October 1, 2021
Equity Based Payments
Principal units (in shares)	3,053,121
KKR Equity Incentive Plans | April 1, 2022
Equity Based Payments
Principal units (in shares)	3,796,017
KKR Equity Incentive Plans | October 1, 2022
Equity Based Payments
Principal units (in shares)	1,698,170
KKR Equity Incentive Plans | April 1, 2023
Equity Based Payments
Principal units (in shares)	3,075,661
KKR Equity Incentive Plans | October 1, 2023
Equity Based Payments
Principal units (in shares)	440,062
KKR Equity Incentive Plans | April 1, 2024
Equity Based Payments
Principal units (in shares)	2,459,191
KKR Equity Incentive Plans | October 1, 2024
Equity Based Payments
Principal units (in shares)	199,809
KKR Equity Incentive Plans | April 1, 2025
Equity Based Payments
Principal units (in shares)	1,879,817
KKR Equity Incentive Plans | October 1, 2025
Equity Based Payments
Principal units (in shares)	158,430
KKR Equity Incentive Plans | April 1, 2026
Equity Based Payments
Principal units (in shares)	1,724,951
KKR Holdings Awards | KKR Holdings Awards
Equity Based Payments
Principal units (in shares)	7,335,000	10,240,000
KKR Holdings Awards | KKR Holdings Awards | October 1, 2021
Equity Based Payments
Principal units (in shares)	3,425,000
KKR Holdings Awards | KKR Holdings Awards | October 1, 2022
Equity Based Payments
Principal units (in shares)	3,910,000