v3.25.4
Condensed Statements of Assets and Liabilities (Parenthetical) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Units outstanding 129,371,828 4,000
Investment owned, cost $ 3,324,540 $ 0
BXINFRA Aggregator (CYM) L.P. [Member]    
Units outstanding 138,551,291 0
Investment owned, cost $ 3,019,921 $ 0
Derivative assets at cost 0 0
Derivative liabilities at cost 0 0
BXINFRA Aggregator (CYM) L.P. [Member] | Investment, Affiliated Issuer [Member]    
Investment owned, cost $ 802,546 $ 0
Class S Units [Member]    
Units authorized unlimited unlimited
Units issued 41,962,043 0
Units outstanding 41,962,043 0
Class D Units [Member]    
Units authorized unlimited unlimited
Units issued 4,271,682 0
Units outstanding 4,271,682 0
Class I Units [Member]    
Units authorized unlimited unlimited
Units issued 83,138,103 4,000
Units outstanding 83,138,103 4,000
Capital Unit, Class A [Member] | BXINFRA Aggregator (CYM) L.P. [Member]    
Units authorized unlimited unlimited
Units issued 138,551,291 0
Units outstanding 138,551,291 0
Capital Unit, Class B [Member] | BXINFRA Aggregator (CYM) L.P. [Member]    
Units authorized unlimited unlimited
Units issued 0 0
Units outstanding 0 0