First Trust Bloomberg R&D Leaders ETF Average Annual Total Returns |
12 Months Ended | 15 Months Ended | 20 Months Ended | 60 Months Ended | 102 Months Ended | |
|---|---|---|---|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Bloomberg R&D Leaders Select Index (reflects no deduction for fees, expenses or taxes)[Member] | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | 23.04% | 30.80% | ||||
| S&P 500® Index (reflects no deduction for fees, expenses or taxes)[Member] | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | 17.88% | 17.16% | 21.77% | 14.42% | 14.76% | |
| First Trust Bloomberg R&D Leaders ETF | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | 22.29% | 29.96% | ||||
| Performance Inception Date | Apr. 30, 2024 | |||||
| First Trust Bloomberg R&D Leaders ETF | After Taxes on Distributions | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | 22.29% | 29.95% | ||||
| First Trust Bloomberg R&D Leaders ETF | After Taxes on Distributions and Sales | ||||||
| Prospectus [Line Items] | ||||||
| Average Annual Return, Percent | 13.20% | 23.28% |