v3.26.3
Condensed Schedules of Investments (Unaudited) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Summary of Investment Holdings [Line Items]    
Fair Value $ 6,421,142 $ 3,555,635
Fair Value as a Percentage of Net Assets 101.60% 102.00%
Investment, Identifier [Axis]: Investments | BXINFRA Aggregator (CYM) L.P.    
Summary of Investment Holdings [Line Items]    
Fair Value [1] $ 6,421,142 $ 3,555,635
Fair Value as a Percentage of Net Assets [1] 101.60% 102.00%
[1] Refer to Note 3. “Investment in the Aggregator” for details on BXINFRA U.S.’s proportional share of investments through investees.