v3.26.1
Expense Example - Blackstone Alternative Multi-Strategy Fund
Mar. 31, 2026
USD ($)
Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 368
Expense Example, with Redemption, 3 Years 1,122
Expense Example, with Redemption, 5 Years 1,898
Expense Example, with Redemption, 10 Years 3,930
Class D Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 393
Expense Example, with Redemption, 3 Years 1,194
Expense Example, with Redemption, 5 Years 2,015
Expense Example, with Redemption, 10 Years 4,144
Class R Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 383
Expense Example, with Redemption, 3 Years 1,166
Expense Example, with Redemption, 5 Years 1,968
Expense Example, with Redemption, 10 Years 4,059
Class Y Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 361
Expense Example, with Redemption, 3 Years 1,097
Expense Example, with Redemption, 5 Years 1,855
Expense Example, with Redemption, 10 Years $ 3,845