v3.26.1
S000055516 [Member] Investment Objectives and Goals - Northern Trust Core Bond ETF
Oct. 31, 2025
Prospectus [Line Items]  
Risk/Return [Heading] Northern Trust Core Bond ETF (formerly, FlexShares® Core Select Bond Fund)
Objective [Heading] Investment Objective
Objective, Primary [Text Block]
The Fund seeks total return and preservation of capital.