Janus Henderson Small Cap Value Fund Investment Objectives and Goals - Class A C S I N R T Shares [Member] - Janus Henderson Small Cap Value Fund |
Jun. 30, 2026 |
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| Prospectus [Line Items] | |
| Risk/Return [Heading] | <span style="color:#000000;font-family:Times New Roman;font-size:15.20pt;font-weight:bold;">Janus Henderson Small Cap Value Fund</span> |
| Objective [Heading] | <span style="color:#FFFFFF;font-family:Times New Roman;font-size:10.45pt;font-weight:bold;margin-left:0.0pt;text-transform:uppercase;">Investment Objective</span> |
| Objective, Primary [Text Block] | Janus Henderson Small Cap Value Fund seeks capital appreciation. |