Janus Henderson Global Allocation Fund - Growth Fees and Expenses - Class D Shares [Member] - Janus Henderson Global Allocation Fund - Growth |
Jun. 30, 2026 |
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| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | <span style="color:#FFFFFF;font-family:Times New Roman;font-size:10.45pt;font-weight:bold;margin-left:0.0pt;text-transform:uppercase;">Fees and Expenses of the Fund</span> |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell Shares of the Fund. |
| Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] | <span style="color:#000000;font-family:Times New Roman;font-size:7.60pt;">“Acquired Fund” refers to any underlying fund (including, but not limited to, exchange-traded funds) in which the Fund invests or has invested during the period. Acquired fund fees and expenses are indirect expenses the Fund incurs as a result of investing in shares of an underlying fund. The Fund’s “Total Annual Fund Operating Expenses” may not correlate to the “Ratio of gross expenses to average net assets” presented in the Financial Highlights table because that ratio includes only the direct operating expenses incurred by the Fund, not the indirect costs of investing in Acquired Funds.</span> |
| Operating Expenses Caption [Optional Text] | <span style="font-family:Times New Roman;font-size:8.55pt;font-weight:bold;margin-left:0.0pt;">ANNUAL FUND OPERATING EXPENSES</span><span style="font-family:Times New Roman;font-size:8.55pt;margin-left:0.0pt;">(expenses that you pay each year as a percentage of the value of your investment)</span> |
| Expense Example [Heading] | <span style="color:#000000;font-family:Times New Roman;font-size:9.50pt;font-weight:bold;">EXAMPLE:</span> |
| Expense Example by Year [Heading] | <span style="font-family:Times New Roman;font-size:9.50pt;">The Example assumes that you invest $10,000 in the Fund for the time periods indicated, reinvest all dividends and distributions, and then redeem all of your Shares at the end of each period. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses (including the operating expenses of the underlying funds) remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</span> |
| Expense Example Narrative [Text Block] | The Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Portfolio Turnover [Heading] | <span style="font-family:Times New Roman;font-size:9.50pt;font-weight:bold;">Portfolio Turnover:</span> |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 43% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 43.00% |