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S000033316 [Member] Investment Objectives and Goals - FlexShares iBoxx 3-Year Target Duration TIPS Index Fund
Oct. 31, 2025
Prospectus [Line Items]  
Risk/Return [Heading] FlexShares® iBoxx® 3-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 3-Year Target Duration TIPS Index (the “Underlying Index”).