v3.26.3
Condensed Statements of Assets and Liabilities (Unaudited) (Parenthetical) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Investment owned, cost $ 5,529,843,000 $ 3,324,540
Other Receivable, after Allowance for Credit Loss, Related Party [Extensible Enumeration] Affiliated Entity [Member] Affiliated Entity [Member]
Other Liability, Related Party [Extensible Enumeration] Affiliated Entity [Member] Affiliated Entity [Member]
Units outstanding (in shares) 205,439,267 129,371,828
Series I Units    
Units issued (in shares) [1] 137,502,712 83,138,103
Units outstanding (in shares) [1] 137,502,712 83,138,103
Common Stock, Shares Authorized, Unlimited [Fixed List] Unlimited Unlimited
Series II Units    
Units issued (in shares) [1] 1,000,293 0
Units outstanding (in shares) [1] 1,000,293 0
Common Stock, Shares Authorized, Unlimited [Fixed List] Unlimited Unlimited
Series III Units    
Units issued (in shares) [1] 0 0
Units outstanding (in shares) [1] 0 0
Common Stock, Shares Authorized, Unlimited [Fixed List] Unlimited Unlimited
Class S Units    
Units issued (in shares) 60,245,939 41,962,043
Units outstanding (in shares) 60,245,939 41,962,043
Common Stock, Shares Authorized, Unlimited [Fixed List] Unlimited Unlimited
Class D Units    
Units issued (in shares) 6,690,323 4,271,682
Units outstanding (in shares) 6,690,323 4,271,682
Common Stock, Shares Authorized, Unlimited [Fixed List] Unlimited Unlimited
[1] On March 6, 2026, BXINFRA U.S. redesignated existing Class I Units as Class I-Series I Units and designated two new series of Class I Units, Class I-Series II Units and Class I-Series III Units.