v3.26.3
Share Transactions - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 9 Months Ended
Jun. 29, 2026
Oct. 30, 2026
Sep. 30, 2026
Sep. 30, 2025
May 06, 2026
May 09, 2025
Class of Stock [Line Items]            
Amount authorized to repurchase         $ 300  
Shares repurchased     $ 73      
Convertible Preferred Stock            
Class of Stock [Line Items]            
Sale of stock (in shares) 6,000,000          
KKR Alternative Assets L.P. | Convertible Preferred Stock            
Class of Stock [Line Items]            
Sale of stock (in dollars per share) $ 25.00          
Subsequent Event            
Class of Stock [Line Items]            
Share repurchased (in shares)   1,546,162        
Shares acquired (in dollars per share)   $ 10.88        
Shares repurchased   $ 17        
Distribution Reinvestment Plan            
Class of Stock [Line Items]            
Stock repurchased and distributed (in shares)     807,122 695,324    
Average cost per share of stock repurchased and distributed (in dollars per share)     $ 10.65 $ 21.19    
Stock repurchased and distributed     $ 9 $ 15    
Distribution Reinvestment Plan | Subsequent Event            
Class of Stock [Line Items]            
Stock repurchased and distributed (in shares)   361,214        
Average cost per share of stock repurchased and distributed (in dollars per share)   $ 11.11        
Stock repurchased and distributed   $ 4        
Share Repurchase Authorization            
Class of Stock [Line Items]            
Share repurchased (in shares)     6,533,672 0    
Shares acquired (in dollars per share)     $ 11.20      
Shares repurchased     $ 73 $ 0    
Equity Distribution Agreements            
Class of Stock [Line Items]            
Amount of stock authorized to sell           $ 750
Sale of stock, sales commission (as percent)           1.50%