Investment Objectives and Goals - FT Vest U.S. Equity Moderate Buffer ETF - May |
Aug. 31, 2025 |
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| Prospectus [Line Items] | |
| Risk/Return [Heading] | <span style="color:#000000;font-family:Arial;font-size:12.60pt;font-weight:bold;">FT Vest U.S. Equity Moderate Buffer ETF </span><span style="color:#000000;font-family:Arial;font-size:12.60pt;font-weight:bold;margin-left:3.5pt;">– May (GMAY)</span> |
| Objective [Heading] | <span style="color:#000000;font-family:Arial;font-size:9.90pt;font-weight:bold;">Investment Objective</span> |
| Objective, Primary [Text Block] | The investment objective of the FT Vest U.S. Equity Moderate Buffer ETF – May (the “Fund”) is to seek to provide investors with returns (before fees and expenses) that match the price return of the State Street® SPDR® S&P 500® ETF Trust (the “Underlying ETF”), up to a predetermined upside cap of 13.83% while providing a buffer (before fees and expenses) against the first 15% of Underlying ETF losses, over the period from May 18, 2026 through May 21, 2027. |