S000033315 [Member] 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 |
|
| Northern Trust Morningstar Global Upstream Natural Resources ETF | FlexShares Morningstar Global Upstream Natural Resources Index Fund | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 29.94% | (8.53%) | (1.72%) | 14.65% | 25.72% | 0.73% | 18.08% | (9.22%) | 18.43% | 30.91% |