S000047257 [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 Credit-Scored US Corporate Bond ETF | FlexShares Credit-Scored US Corporate Bond Index Fund | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 8.00% | 4.63% | 7.52% | (10.03%) | (1.20%) | 8.65% | 10.80% | (0.82%) | 3.73% | 3.22% |