v3.25.4
Cover Page - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Feb. 28, 2026
Document Information [Line Items]    
Document Type 10-K  
Amendment Flag false  
Document Period End Date Dec. 31, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus FY  
Trading Symbol None  
Entity Registrant Name Blackstone Infrastructure Strategies L.P.  
Entity Central Index Key 0002030772  
Current Fiscal Year End Date --12-31  
Entity Well-known Seasoned Issuer No  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Entity Emerging Growth Company true  
Entity Small Business false  
Document Transition Report false  
Document Annual Report true  
Title of 12(b) Security None  
Security Exchange Name NONE  
Entity Shell Company false  
Entity Voluntary Filers No  
Entity Interactive Data Current Yes  
Entity File Number 000-56672  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 99-4067586  
Entity Address, Address Line One 345 Park Avenue  
Local Phone Number 583-5000  
Entity Address, State or Province NY  
Entity Address, City or Town New York  
City Area Code 212  
Entity Address, Postal Zip Code 10154  
Entity Public Float $ 0  
Auditor Name DELOITTE & TOUCHE LLP  
Auditor Firm ID 34  
Auditor Location New York  
Document Financial Statement Error Correction [Flag] false  
Entity Ex Transition Period false  
Class S Limited Partnership Units [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   45,757,896
Class D Limited Partnership Units [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   4,809,688
Class I Limited Partnership Units [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   93,995,980