DEBT OBLIGATIONS - KKR's Borrowings (Details) - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2017	Dec. 31, 2016	Mar. 30, 2017
Debt Instrument [Line Items]
Financing Available	$ 3,429,633,000	$ 3,539,532,000
Borrowing Outstanding	19,625,439,000	18,544,075,000
Fair Value	19,680,983,000	18,539,725,000
Fund Financing Facilities and Other
Debt Instrument [Line Items]
Financing Available	1,929,633,000	2,039,532,000
Borrowing Outstanding	2,636,452,000	2,333,654,000
Fair Value	$ 2,636,452,000	$ 2,333,654,000
Weighted average interest rate (percentage)	2.80%	2.40%
Weighted average remaining maturity (in years)	3 years 7 months 6 days	2 years 4 months 24 days
Debt Obligations of Consolidated CFEs
Debt Instrument [Line Items]
Borrowing Outstanding	$ 14,283,962,000
Senior Notes \| KKR Issued 6.375% Notes Due 2020
Debt Instrument [Line Items]
Borrowing Outstanding	497,950,000	$ 497,804,000
Fair Value	562,475,000	$ 562,960,000
Aggregate principal amount	$ 500,000,000
Interest rate, stated percentage	6.375%	6.375%
Unamortized debt issuance costs	$ 1,300,000	$ 1,400,000
Senior Notes \| KKR Issued 5.500% Notes Due 2043
Debt Instrument [Line Items]
Borrowing Outstanding	491,242,000	491,158,000
Fair Value	521,560,000	$ 502,800,000
Aggregate principal amount	$ 500,000,000
Interest rate, stated percentage	5.50%	5.50%
Unamortized debt issuance costs	$ 3,800,000	$ 3,900,000
Senior Notes \| KKR Issued 5.125% Notes Due 2044
Debt Instrument [Line Items]
Borrowing Outstanding	990,101,000	990,009,000
Fair Value	990,320,000	$ 955,240,000
Aggregate principal amount	$ 1,000,000,000.0
Interest rate, stated percentage	5.125%	5.125%
Unamortized debt issuance costs	$ 8,600,000	$ 8,600,000
Senior Notes \| KFN Issued 5.500% Notes Due 2032 \| KFN
Debt Instrument [Line Items]
Borrowing Outstanding	367,845,000	0
Fair Value	367,845,000	0
Aggregate principal amount	$ 375,000,000		$ 375,000,000
Interest rate, stated percentage	5.50%		5.50%
Unamortized debt issuance costs	$ 4,500,000
Senior Notes \| KFN Issued 7.500% Notes Due 2042 \| KFN
Debt Instrument [Line Items]
Borrowing Outstanding	122,908,000	123,008,000
Fair Value	117,576,000	$ 116,699,000
Aggregate principal amount	$ 115,000,000
Interest rate, stated percentage	7.50%	7.50%
Senior Notes \| KFN Issued Junior Subordinated Notes \| KFN
Debt Instrument [Line Items]
Borrowing Outstanding	$ 234,979,000	$ 250,154,000
Fair Value	200,793,000	210,084,000
Aggregate principal amount	$ 264,800,000.0
Weighted average interest rate (percentage)	3.50%
Weighted average remaining maturity (in years)	20 years
Collateralized Mortgage Backed Securities
Debt Instrument [Line Items]
Borrowing Outstanding	$ 5,313,570,000	5,294,741,000
Fair Value	5,313,570,000	5,294,741,000
Collateralized Mortgage Backed Securities \| Debt Obligations of Consolidated CFEs
Debt Instrument [Line Items]
Borrowing Outstanding	$ 5,313,570,000
Weighted average interest rate (percentage)	4.40%
Weighted average remaining maturity (in years)	31 years 9 months 18 days
Senior Secured Notes \| Debt Obligations of Consolidated CFEs
Debt Instrument [Line Items]
Borrowing Outstanding	$ 8,692,761,000	8,279,812,000
Fair Value	$ 8,692,761,000	8,279,812,000
Weighted average interest rate (percentage)	2.60%
Weighted average remaining maturity (in years)	10 years 10 months 24 days
Subordinated Notes \| Debt Obligations of Consolidated CFEs
Debt Instrument [Line Items]
Borrowing Outstanding	$ 277,631,000	283,735,000
Fair Value	$ 277,631,000	283,735,000
Weighted average remaining maturity (in years)	11 years 3 months 18 days
Revolving Credit Facility \| Corporate Credit Agreement
Debt Instrument [Line Items]
Financing Available	$ 1,000,000,000	1,000,000,000
Borrowing Outstanding	0	0
Fair Value	0	0
Revolving Credit Facility \| KCM Credit Agreement
Debt Instrument [Line Items]
Financing Available	500,000,000	500,000,000
Borrowing Outstanding	0	0
Fair Value	$ 0	$ 0

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- Definition

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Face (par) amount of debt instrument at time of issuance.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Weighted average interest rate of debt outstanding.

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- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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