DEBT OBLIGATIONS - Components of Debt Obligations (Details) - Asset Management and Strategic Holdings - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Financing Available	$ 10,819,037	$ 9,605,184
Principal	46,233,585	45,414,041
Carrying Value	45,641,569	44,886,870
Fair Value	44,820,956	43,681,627
Total KKR & KFN Notes
Debt Instrument [Line Items]
Principal	8,764,220	8,139,538
Carrying Value	8,622,715	7,978,871
Fair Value	7,871,531	6,981,707
Revolving Credit Facility
Debt Instrument [Line Items]
Financing Available	4,218,644	2,986,492
Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Financing Available	4,218,644	2,986,492
Under 1 Year \| Revolving Credit Facility
Debt Instrument [Line Items]
Financing Available	750,000	750,000
1-5 Years \| Revolving Credit Facility
Debt Instrument [Line Items]
Financing Available	3,468,644	2,236,492
After 5 Years \| Revolving Credit Facility
Debt Instrument [Line Items]
Financing Available	0	0
KKR USD Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Principal	5,000,000	5,000,000
Carrying Value	4,910,682	4,890,919
Fair Value	$ 4,377,450	$ 4,181,595
Weighted average interest rate (percentage)	4.23%	4.23%
Under 1 Year \| Senior Notes
Debt Instrument [Line Items]
Principal	$ 0	$ 0
Carrying Value	0	0
Fair Value	0	0
1-5 Years \| Senior Notes
Debt Instrument [Line Items]
Principal	750,000	0
Carrying Value	745,778	0
Fair Value	727,988	0
After 5 Years \| Senior Notes
Debt Instrument [Line Items]
Principal	4,250,000	5,000,000
Carrying Value	4,164,904	4,890,919
Fair Value	3,649,462	4,181,595
KKR Yen Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Principal	1,591,953	973,621
Carrying Value	1,581,283	966,033
Fair Value	$ 1,568,168	$ 943,544
Weighted average interest rate (percentage)	1.67%	1.46%
Under 1 Year \| Senior Notes
Debt Instrument [Line Items]
Principal	$ 34,804	$ 0
Carrying Value	34,750	0
Fair Value	34,751	0
1-5 Years \| Senior Notes
Debt Instrument [Line Items]
Principal	909,091	610,552
Carrying Value	905,522	608,047
Fair Value	904,937	606,447
After 5 Years \| Senior Notes
Debt Instrument [Line Items]
Principal	648,058	363,069
Carrying Value	641,011	357,986
Fair Value	628,480	337,097
KKR Euro Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Principal	723,750	717,400
Carrying Value	719,373	712,331
Fair Value	$ 679,022	$ 646,248
Weighted average interest rate (percentage)	1.63%	1.63%
Under 1 Year \| Senior Notes
Debt Instrument [Line Items]
Principal	$ 0	$ 0
Carrying Value	0	0
Fair Value	0	0
1-5 Years \| Senior Notes
Debt Instrument [Line Items]
Principal	723,750	717,400
Carrying Value	719,373	712,331
Fair Value	679,022	646,248
After 5 Years \| Senior Notes
Debt Instrument [Line Items]
Principal	0	0
Carrying Value	0	0
Fair Value	0	0
KKR Subordinated Notes \| Subordinated Notes
Debt Instrument [Line Items]
Principal	500,000	500,000
Carrying Value	487,022	486,755
Fair Value	$ 407,800	$ 377,400
Weighted average interest rate (percentage)	4.63%	4.63%
Under 1 Year \| Subordinated Notes
Debt Instrument [Line Items]
Principal	$ 0	$ 0
Carrying Value	0	0
Fair Value	0	0
1-5 Years \| Subordinated Notes
Debt Instrument [Line Items]
Principal	0	0
Carrying Value	0	0
Fair Value	0	0
After 5 Years \| Subordinated Notes
Debt Instrument [Line Items]
Principal	500,000	500,000
Carrying Value	487,022	486,755
Fair Value	407,800	377,400
KFN USD Senior Notes \| Senior Notes \| KFN
Debt Instrument [Line Items]
Principal	690,000	690,000
Carrying Value	684,555	684,032
Fair Value	$ 630,845	$ 624,018
Weighted average interest rate (percentage)	5.44%	5.44%
Under 1 Year \| Senior Notes \| KFN
Debt Instrument [Line Items]
Principal	$ 0	$ 0
Carrying Value	0	0
Fair Value	0	0
1-5 Years \| Senior Notes \| KFN
Debt Instrument [Line Items]
Principal	0	0
Carrying Value	0	0
Fair Value	0	0
After 5 Years \| Senior Notes \| KFN
Debt Instrument [Line Items]
Principal	690,000	690,000
Carrying Value	684,555	684,032
Fair Value	630,845	624,018
KFN Junior Subordinated Notes \| Junior Subordinated Notes \| KFN
Debt Instrument [Line Items]
Principal	258,517	258,517
Carrying Value	239,800	238,801
Fair Value	$ 208,246	$ 208,902
Weighted average interest rate (percentage)	8.00%	8.10%
Weighted average remaining maturity (in years)	12 years	12 years 9 months 18 days
Under 1 Year \| Junior Subordinated Notes \| KFN
Debt Instrument [Line Items]
Principal	$ 0	$ 0
Carrying Value	0	0
Fair Value	0	0
1-5 Years \| Junior Subordinated Notes \| KFN
Debt Instrument [Line Items]
Principal	0	0
Carrying Value	0	0
Fair Value	0	0
After 5 Years \| Junior Subordinated Notes \| KFN
Debt Instrument [Line Items]
Principal	258,517	258,517
Carrying Value	239,800	238,801
Fair Value	208,246	208,902
Other Debt Obligations
Debt Instrument [Line Items]
Financing Available	6,600,393	6,618,692
Principal	37,469,365	37,274,503
Carrying Value	37,018,854	36,907,999
Fair Value	$ 36,949,425	$ 36,699,920

Represents the weighted average maturity period of debt instruments during the reporting period.

No definition available.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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- Definition

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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- Definition

Weighted average interest rate of debt outstanding.

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No definition available.

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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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- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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- Definition

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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