S000034352 [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 iBoxx 5-Year Target Duration TIPS ETF | FlexShares iBoxx 5-Year Target Duration TIPS Index Fund | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 7.86% | 2.19% | 4.19% | (9.47%) | 5.29% | 10.17% | 7.96% | (0.86%) | 1.97% | 4.22% |