S000054498 [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 |
|
| Northern Trust STOXX US ESG Select ETF | FlexShares STOXX US ESG Select Index Fund | |||||||||
| Prospectus [Line Items] | |||||||||
| Annual Return [Percent] | 15.88% | 20.28% | 27.83% | (19.82%) | 28.53% | 20.82% | 31.10% | (3.56%) | 21.37% |