Alger AI Enablers & Adopters Average Annual Total Returns - Class Y Shares [Member] |
12 Months Ended | 21 Months Ended | 24 Months Ended | 48 Months Ended | 58 Months Ended | 60 Months Ended | 72 Months Ended | 106 Months Ended | |
|---|---|---|---|---|---|---|---|---|---|
Oct. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| S&P 500 Index (reflects no deductions for fees, expenses or taxes)[Member] | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 17.88% | 19.32% | 17.88% | 11.11% | 14.52% | 14.42% | 14.96% | 14.69% | |
| Class Y | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 41.28% | 43.56% | |||||||
| Performance Inception Date | Apr. 04, 2024 | ||||||||
| Class Y | After Taxes on Distributions | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 37.96% | 40.94% | |||||||
| Class Y | After Taxes on Distributions and Sales | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 24.58% | 33.00% |