Alger Capital Appreciation Portfolio Investment Objectives and Goals - Class S Shares [Member] - Alger Capital Appreciation Portfolio |
Dec. 31, 2025 |
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| Prospectus [Line Items] | |
| Risk/Return [Heading] | <span style="color:#262626;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">Alger Capital Appreciation Portfolio</span> |
| Objective [Heading] | <span style="color:#0064FA;font-family:Arial;font-size:10pt;font-weight:bold;">Investment Objective</span> |
| Objective, Primary [Text Block] | Alger Capital Appreciation Portfolio seeks long-term capital appreciation. |