S000050613 [Member] Investment Objectives and Goals - FlexShares Credit-Scored US Long Corporate Bond Index Fund

Oct. 31, 2025

Prospectus [Line Items]

Risk/Return [Heading]

FlexShares® Credit-Scored US Long Corporate Bond Index Fund

Objective [Heading]

Investment Objective

Objective, Primary [Text Block]

The Fund seeks investment results that correspond generally to the price and yield performance, before fees and expenses, of the Northern Trust US Long Corporate Bond Quality Value IndexSM (the “Underlying Index”).