Janus Henderson Balanced Portfolio Annual Fund Operating Expenses - Institutional Shares [Member] - Janus Henderson Balanced Portfolio - Institutional Shares |
Dec. 31, 2025 |
|---|---|
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 0.55% |
| Other Expenses (as a percentage of Assets): | 0.07% |
| Expenses (as a percentage of Assets) | 0.62% |