S000065839 [Member] Expense Example - Northern Trust Emerging Markets Quality Low Volatility ETF - FlexShares Emerging Markets Quality Low Volatility Index Fund |
Oct. 31, 2025
USD ($)
|
|---|---|
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 18 |
| Expense Example, with Redemption, 3 Years | 60 |
| Expense Example, with Redemption, 5 Years | 106 |
| Expense Example, with Redemption, 10 Years | $ 242 |