v3.26.3
Net Assets - Schedule of Aggregate Distributions Declared and Payable (Details) - $ / shares
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Series I-TE Units | Blackstone Infrastructure Strategies (TE) L.P.                
Distribution Made to Limited Partner [Line Items]                
Distributions per unit (in dollars per share)             $ 0.6613 $ 0.4936
Series I-TE Units | Unit Distribution | Blackstone Infrastructure Strategies (TE) L.P.                
Distribution Made to Limited Partner [Line Items]                
Distributions per unit (in dollars per share) $ 0.2266 $ 0.2173 $ 0.2174 $ 0.1986 $ 0.1992 $ 0.0958    
Class S-TE Units | Blackstone Infrastructure Strategies (TE) L.P.                
Distribution Made to Limited Partner [Line Items]                
Distributions per unit (in dollars per share)             0.6613 0.4936
Class S-TE Units | Unit Distribution | Blackstone Infrastructure Strategies (TE) L.P.                
Distribution Made to Limited Partner [Line Items]                
Distributions per unit (in dollars per share) 0.2266 0.2173 0.2174 0.1986 0.1992 0.0958    
Series I Units | Unit Distribution                
Distribution Made to Limited Partner [Line Items]                
Distributions per unit (in dollars per share) 0.2289 0.2191 0.2192 0.1996 0.1998 0.0958 0.6672 0.4952
Series I Units | Unit Distribution | BXINFRA Aggregator (CYM) L.P.                
Distribution Made to Limited Partner [Line Items]                
Distributions per unit (in dollars per share) 0.2300 0.2200 0.2200 0.2000 0.2000 0.0962 0.6700 0.4962
Series II Units | Unit Distribution                
Distribution Made to Limited Partner [Line Items]                
Distributions per unit (in dollars per share) 0.2289 0 0       0.2289  
Series II Units | Unit Distribution | BXINFRA Aggregator (CYM) L.P.                
Distribution Made to Limited Partner [Line Items]                
Distributions per unit (in dollars per share) 0.2300 0 0       0.2300  
Class S Units | Unit Distribution                
Distribution Made to Limited Partner [Line Items]                
Distributions per unit (in dollars per share) 0.2289 0.2191 0.2192 0.1996 0.1998 0.0958 0.6672 0.4952
Class D Units | Unit Distribution                
Distribution Made to Limited Partner [Line Items]                
Distributions per unit (in dollars per share) $ 0.2289 $ 0.2191 $ 0.2192 $ 0.1996 $ 0.1998 $ 0.0958 $ 0.6672 $ 0.4952