First Trust NASDAQ Clean Edge Green Energy Index Fund Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| First Trust NASDAQ Clean Edge Green Energy Index Fund | First Trust NASDAQ Clean Edge Green Energy Index Fund | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 31.66% | (18.82%) | (9.98%) | (30.37%) | (3.14%) | 183.52% | 42.69% | (12.22%) | 31.73% | (2.12%) |