Annual Total Returns |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| FT Vest U.S. Equity Buffer ETF - August | FT Vest U.S. Equity Buffer ETF - August | ||||
| Prospectus [Line Items] | ||||
| Annual Return [Percent] | 16.76% | (10.54%) | 11.75% | 12.25% |