Form N-1A Supplement |
Mar. 31, 2026 |
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| Prospectus [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Supplement to Prospectus [Text Block] | BLACKSTONE ALTERNATIVE INVESTMENT FUNDS Supplement dated September 8, 2026 to the Blackstone Alternative Multi-Strategy Fund (the “Fund”) Prospectus, dated July 30, 2026 Addition of Sub‑Adviser Pursuant to action taken by the Board of Trustees of the Fund, Dardanelles Capital, LP will serve as a discretionary sub‑adviser to the Fund. Effective immediately, the Fund’s Prospectus is revised as follows: The list of sub‑advisers to the Fund in the “Fund Summary—Principal Investment Strategies” section of the Prospectus is deleted in its entirety and replaced with the following:
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| Blackstone Alternative Multi-Strategy Fund | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Supplement to Prospectus [Text Block] | BLACKSTONE ALTERNATIVE INVESTMENT FUNDS Supplement dated September 8, 2026 to the Blackstone Alternative Multi-Strategy Fund (the “Fund”) Prospectus, dated July 30, 2026 Addition of Sub‑Adviser Pursuant to action taken by the Board of Trustees of the Fund, Dardanelles Capital, LP will serve as a discretionary sub‑adviser to the Fund. Effective immediately, the Fund’s Prospectus is revised as follows: The list of sub‑advisers to the Fund in the “Fund Summary—Principal Investment Strategies” section of the Prospectus is deleted in its entirety and replaced with the following:
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