Average Annual Total Returns |
12 Months Ended | 14 Months Ended | |
|---|---|---|---|
Aug. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2024 |
|
| S&P 500® Index (reflects no deduction for fees, expenses or taxes)[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 25.02% | 33.75% | |
| FT Vest U.S. Equity Moderate Buffer ETF - October | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 8.34% | 12.87% | |
| Performance Inception Date | Oct. 20, 2023 | ||
| FT Vest U.S. Equity Moderate Buffer ETF - October | After Taxes on Distributions | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 8.34% | 12.87% | |
| FT Vest U.S. Equity Moderate Buffer ETF - October | After Taxes on Distributions and Sales | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 4.94% | 9.83% |