S000069167 [Member] Investment Objectives and Goals - William Blair Emerging Markets Debt Fund |
Dec. 31, 2025 |
|---|---|
| Prospectus [Line Items] | |
| Risk/Return [Heading] | WILLIAM BLAIR EMERGING MARKETS DEBT FUND SUMMARY |
| Objective [Heading] | INVESTMENT OBJECTIVE: |
| Objective, Primary [Text Block] | The William Blair Emerging Markets Debt Fund seeks to provide attractive risk-adjusted returns relative to the Fund’s benchmark. |