S000034352 [Member] Investment Objectives and Goals - Northern Trust iBoxx 5-Year Target Duration TIPS ETF |
Oct. 31, 2025 |
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| Prospectus [Line Items] | |
| Risk/Return [Heading] | Northern Trust iBoxx® 5-Year Target Duration TIPS ETF (formerly, FlexShares® iBoxx® 5-Year Target Duration TIPS Index Fund) |
| Objective [Heading] | Investment Objective |
| Objective, Primary [Text Block] | The Fund seeks to provide investment results that, before fees and expenses, correspond generally to the price and yield performance of the iBoxx 5-Year Target Duration TIPS Index (the “Underlying Index”).
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