v3.26.3
Cover
Sep. 22, 2026
Document Information [Line Items]  
Document Type 8-K
Document Period End Date Sep. 22, 2026
Entity Registrant Name Blackstone Multi-Strategy Hedge Fund L.P.
Entity Incorporation, State or Country Code DE
Securities Act File Number 000-56796
Entity Tax Identification Number 41-2436049
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Central Index Key 0002095486
Amendment Flag false
Entity Addresses [Line Items]  
Entity Address, Address Line One 345 Park Avenue
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10154
City Area Code (212)
Local Phone Number 583-5000
Entity Listings [Line Items]  
Title of 12(b) Security None
Trading Symbol None