v3.26.1
Investment Objectives and Goals - Harbor Short Term Treasury ETF
Jul. 31, 2026
Prospectus [Line Items]  
Risk/Return [Heading] <span style="color:#FFFFFF;font-family:Times New Roman;font-size:18pt;">Harbor Short Term Treasury ETF</span><span style="color:#FFFFFF;font-family:Arial;font-size:16pt;font-weight:bold;">Fund Summary</span>
Objective [Heading] <span style="color:#004DD6;font-family:Arial Narrow;font-size:14pt;font-weight:bold;">Investment Objective</span>
Objective, Primary [Text Block] The Fund seeks to provide exposure, before fees and expenses, generally consistent with the price and yield performance of the 3-month U.S. Treasury bill market.