Alger International Opportunities Fund Expense Example - Class A B C Shares [Member] - Alger International Opportunities Fund |
Oct. 31, 2025
USD ($)
|
|---|---|
| Class A | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 646 |
| Expense Example, with Redemption, 3 Years | 901 |
| Expense Example, with Redemption, 5 Years | 1,175 |
| Expense Example, with Redemption, 10 Years | 1,957 |
| Class B | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 699 |
| Expense Example, with Redemption, 3 Years | 915 |
| Expense Example, with Redemption, 5 Years | 1,257 |
| Expense Example, with Redemption, 10 Years | 2,285 |
| Class C | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 311 |
| Expense Example, with Redemption, 3 Years | 652 |
| Expense Example, with Redemption, 5 Years | 1,119 |
| Expense Example, with Redemption, 10 Years | $ 2,410 |