SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Redeemable Noncontrolling Interests) (Details)	3 Months Ended
Mar. 31, 2015
Accounting Policies [Abstract]
Expiration period of redeemable noncontrolling interests, low end of range	1 year
Expiration period of redeemable noncontrolling interests, high end of range	3 years

Represents the high end of range of the expiration period of redeemable noncontrolling interests.

No definition available.

Name:	kkr_RedeemableNoncontrollingInterestExpirationPeriodHighEndOfRange
Namespace Prefix:	kkr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration