Average Annual Total Returns |
12 Months Ended | 42 Months Ended | |
|---|---|---|---|
Aug. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2024 |
|
| MSCI EAFE Index (reflects no deduction for fees, expenses or taxes)[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 3.82% | 2.01% | |
| FT Vest International Equity Moderate Buffer ETF - June | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 1.46% | 2.25% | |
| Performance Inception Date | Jun. 18, 2021 | ||
| FT Vest International Equity Moderate Buffer ETF - June | After Taxes on Distributions | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 1.46% | 2.25% | |
| FT Vest International Equity Moderate Buffer ETF - June | After Taxes on Distributions and Sales | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 0.86% | 1.72% |