v3.26.1
Related Party Transactions (Details) - USD ($)
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Nov. 11, 2025
Dec. 20, 2023
Jul. 27, 2023
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2026
Jun. 30, 2026
Dec. 31, 2025
Dec. 23, 2024
Related Party Transaction [Line Items]                      
Management fees and certain operating expenses       $ 21,286,000 $ 18,498,000 $ 50,958,000 $ 32,305,000        
Management fee payable       11,621,000   11,621,000     $ 11,621,000 $ 0  
Performance participation allocation       48,163,000 29,468,000 107,386,000 89,485,000        
Accrued performance participation allocation       158,297,000   158,297,000     158,297,000 51,704,000  
Payment of deferred financing costs           7,569,000 3,586,000        
Accrued shareholder servicing fees and distribution fees       373,583,000   373,583,000     373,583,000 338,409,000  
Expenses recouped by Manager       0 $ 5,112,000 0 8,960,000        
Due to Manager       $ 18,057,000   18,057,000     18,057,000 14,608,000  
Payments for additional investment           830,802,000 1,316,913,000        
Realized gain on investments           $ 0 $ 32,761,000        
Class F Shares                      
Related Party Transaction [Line Items]                      
Number of shares issued with respect to performance participation allocation (in shares)       18,553 1,518 21,114 1,647        
Value of shares issued with respect to performance participation allocation       $ 700,000 $ 49,000 $ 793,000 $ 53,000        
Affiliated Entity                      
Related Party Transaction [Line Items]                      
Initial offering period     60 months                
Gross management fee       32,907,000 17,586,000 61,942,000 31,393,000        
Management fees and certain operating expenses       21,286,000 18,498,000 50,958,000 32,305,000        
Management fee payable       11,621,000   11,621,000     11,621,000 0  
Unapplied credits       0   0     0 27,148,000  
Expenses recouped by Manager       0 5,112,000 0 8,960,000        
Affiliated Entity | KKR Alternative Assets LLC                      
Related Party Transaction [Line Items]                      
Line of credit facility, maximum borrowing capacity   $ 300,000                  
Line of credit facility, extension option, period 6 months 6 months                  
Extension period 6 months                    
Outstanding line of credit       0   0     0 0  
Affiliated Entity | KKR Alternative Assets LLC | Line of Credit                      
Related Party Transaction [Line Items]                      
Basis spread on variable rate (as a percent)   3.50%                  
Interest rate   0.00%                  
Affiliated Entity | KKR Alternative Assets LLC | Maximum | Line of Credit                      
Related Party Transaction [Line Items]                      
Debt term   364 days                  
Scheduled repayment period   364 days                  
Affiliated Entity | KKR Alternative Assets LLC | Minimum | Line of Credit                      
Related Party Transaction [Line Items]                      
Scheduled repayment period   180 days                  
Affiliated Entity | Credit Agreement                      
Related Party Transaction [Line Items]                      
Line of credit facility, maximum borrowing capacity       1,225,000,000   1,225,000,000     1,225,000,000   $ 1,225,000,000
Outstanding line of credit       0   0     $ 0 0  
Affiliated Entity | Credit Agreement | Line of Credit                      
Related Party Transaction [Line Items]                      
Payment of deferred financing costs       1,125,000 750,000 $ 2,375,000 750,000        
Management Fee Percentage Attributable to Class S, D, U and I Shares | Affiliated Entity                      
Related Party Transaction [Line Items]                      
Expenses rate (as a percent)     1.25%                
Management Fee Percentage Attributable to Class R-S, R-D, Class R-U And R-I Shares Following Acceptance of Initial Subscription of Shares | Affiliated Entity                      
Related Party Transaction [Line Items]                      
Expenses rate (as a percent)     1.00%                
Management Fee Percentage Attributable to Class R-S, R-D, R-U and R-I Shares Following Acceptance of Initial Subscription of Shares | Affiliated Entity                      
Related Party Transaction [Line Items]                      
Expenses rate (as a percent)     1.25%                
Performance Participation Allocation, Total Return Percentage | Class H Shares                      
Related Party Transaction [Line Items]                      
Expenses rate (as a percent)           15.00%          
Performance Participation Allocation, Percentage of Annual Hurdle Amount | Class H Shares                      
Related Party Transaction [Line Items]                      
Expenses rate (as a percent)           5.00%          
Performance Participation Allocation, Catch-Up Percentage | Class H Shares                      
Related Party Transaction [Line Items]                      
Expenses rate (as a percent)           100.00%          
Performance Participation Allocation, Percentage of Excess Profits | Class H Shares                      
Related Party Transaction [Line Items]                      
Expenses rate (as a percent)           100.00%          
Performance Participation Allocation, Percentage of Remaining Excess Profits | Class H Shares                      
Related Party Transaction [Line Items]                      
Expenses rate (as a percent)           15.00%          
Original Issuance Date | Class F Shares                      
Related Party Transaction [Line Items]                      
Related party transaction, term               5 years      
Performance Participation Allocation, Percentage of Cumulative Cash Proceeds | Class F Shares                      
Related Party Transaction [Line Items]                      
Expenses rate (as a percent)                 15.00%    
Other Transactions With Dealer-Manager | Affiliated Entity                      
Related Party Transaction [Line Items]                      
Amount of related party transaction         2,492,000   $ 2,492,000        
Distribution Fees and Servicing Fees | Class R-U Shares, Class R-D Shares, Class D Shares, Class S Shares and Class U                      
Related Party Transaction [Line Items]                      
Accrued shareholder servicing fees and distribution fees       373,583,000   $ 373,583,000     $ 373,583,000 338,409,000  
Distribution Fees and Servicing Fees | Affiliated Entity | Class S, U, R-S and R-U Shares | KKR Capital Markets LLC                      
Related Party Transaction [Line Items]                      
Expenses rate (as a percent)           0.85%          
Distribution Fees and Servicing Fees | Affiliated Entity | Class I, Class R-I, Class E, Class F, Class G or Class H Shares | KKR Capital Markets LLC                      
Related Party Transaction [Line Items]                      
Expenses rate (as a percent)           0.00%          
Distribution Fee | Affiliated Entity | Class S, U, R-S and R-U Shares | KKR Capital Markets LLC                      
Related Party Transaction [Line Items]                      
Expenses rate (as a percent)           0.60%          
Shareholder Servicing Fee | Affiliated Entity | Class S, U, R-S and R-U Shares | KKR Capital Markets LLC                      
Related Party Transaction [Line Items]                      
Expenses rate (as a percent)           0.25%          
Shareholder Servicing Fee | Affiliated Entity | Class D and R-D Shares | KKR Capital Markets LLC                      
Related Party Transaction [Line Items]                      
Expenses rate (as a percent)           0.25%          
Expense Limitation and Reimbursement Agreement | Affiliated Entity                      
Related Party Transaction [Line Items]                      
Related party transaction, term             3 years        
Expense Limitation and Reimbursement Agreement | Affiliated Entity | Maximum                      
Related Party Transaction [Line Items]                      
Expenses rate (as a percent)             0.60%        
Amounts Paid by the Manager and Recouped Under the Expense Limitation Agreement | Affiliated Entity                      
Related Party Transaction [Line Items]                      
Due to Manager       $ 18,057,000   $ 18,057,000     $ 18,057,000 $ 14,608,000  
Interest in Portfolio Company through Tender Offer | Affiliated Entity                      
Related Party Transaction [Line Items]                      
Purchase of investments         293,074,000   $ 293,074,000        
Unrealized appreciation on investments acquired         $ 12,829,000   12,829,000        
Interest in Portfolio Companies from an Investment Vehicle | Affiliated Entity                      
Related Party Transaction [Line Items]                      
Purchase of investments             317,822,000        
Unrealized appreciation on investments acquired             32,719,000        
Interest in Portfolio Company from an Affiliated KKR-Sponsored Investment Vehicle | Affiliated Entity                      
Related Party Transaction [Line Items]                      
Unrealized appreciation on investments acquired           $ 348,654,000 32,507,000        
Payments for additional investment             133,973,000        
Proceeds from sale of interest In investments             64,366,000        
Realized gain on investments             $ 32,761,000