v3.26.1
Shareholder Report
 6 Months Ended
Apr. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Virtus Alternative Solutions Trust
Entity Central Index Key 0001589756
Entity Investment Company Type N-1A
Document Period End Date Apr. 30, 2026
C000159803 [Member]  
Shareholder Report [Line Items]  
Fund Name Virtus Duff & Phelps Select MLP and Energy Fund
Class Name Class I
Trading Symbol VLPIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Virtus Duff & Phelps Select MLP and Energy Fund (“Fund”) for the period of November 1, 2025 to April 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.virtus.com/investor-resources/mutual-fund-documents. You can also request this information by contacting us at 1‑800‑243‑1574.
Additional Information Phone Number 1‑800‑243‑1574
Additional Information Website https://www.virtus.com/investor-resources/mutual-fund-documents
Expenses [Text Block]
What were the Fund costs for the last six months?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment
Virtus Duff & Phelps Select MLP and Energy Fund
Class I / VLPIX		 $66 1.15%
Expenses Paid, Amount $ 66
Expense Ratio, Percent 1.15%
Net Assets $ 51,925,000
Holdings Count | Holding 26
Investment Company Portfolio Turnover 14.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Fund net assets (‘000s) $51,925
Total number of portfolio holdings 26
Portfolio turnover rate as of the end of the reporting period 14%
Holdings [Text Block]
Asset Allocation(1)
Common Stocks 84 %
Diversified 29
Natural Gas Pipelines 23
Electric, LDC & Power 14
Liquefied Natural Gas 7
Downstream/Other 5
Petroleum Transportation & Storage 5
Upstream 1
Master Limited Partnerships 16
Diversified 12
Petroleum Transportation & Storage 4
Total 100 %
​(1)
Percentage of total investments as of April 30, 2026.
C000159801 [Member]  
Shareholder Report [Line Items]  
Fund Name Virtus Duff & Phelps Select MLP and Energy Fund
Class Name Class A
Trading Symbol VLPAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Virtus Duff & Phelps Select MLP and Energy Fund (“Fund”) for the period of November 1, 2025 to April 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.virtus.com/investor-resources/mutual-fund-documents. You can also request this information by contacting us at 1‑800‑243‑1574.
Additional Information Phone Number 1‑800‑243‑1574
Additional Information Website https://www.virtus.com/investor-resources/mutual-fund-documents
Expenses [Text Block]
What were the Fund costs for the last six months?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment
Virtus Duff & Phelps Select MLP and Energy Fund
Class A / VLPAX		 $80 1.40%
Expenses Paid, Amount $ 80
Expense Ratio, Percent 1.40%
Net Assets $ 51,925,000
Holdings Count | Holding 26
Investment Company Portfolio Turnover 14.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of April 30, 2026)
Fund net assets (‘000s) $51,925
Total number of portfolio holdings 26
Portfolio turnover rate as of the end of the reporting period 14%
Holdings [Text Block]
Asset Allocation(1)
Common Stocks 84 %
Diversified 29
Natural Gas Pipelines 23
Electric, LDC & Power 14
Liquefied Natural Gas 7
Downstream/Other 5
Petroleum Transportation & Storage 5
Upstream 1
Master Limited Partnerships 16
Diversified 12
Petroleum Transportation & Storage 4
Total 100 %
​(1)
Percentage of total investments as of April 30, 2026.