|BLDRS Emerging Markets 50 ADR ETF|
|The investment seeks to provide investment results that correspond generally, before fees and expenses, to the price and yield performance of the Bank of New York Emerging Markets 50 ADR Index.
The fund typically invests substantially all of its assets in the securities that make up the index. It is non-diversified.|
| ||ADRE||Category Avg|
|Annual Report Expense Ratio (net)||0.30%||N/A|
|Annual Holdings Turnover||8.62%||N/A|
|Total Net Assets||NaN||N/A|