Janus Henderson International Dividend Fund Annual Fund Operating Expenses - Class A C S I N T Shares [Member] - Janus Henderson International Dividend Fund |
Jun. 30, 2026 |
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| Prospectus [Line Items] | ||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | <span style="font-family:Times New Roman;font-size:7.60pt;">The Adviser has contractually agreed to waive its investment advisory fee and/or reimburse operating expenses to the extent that the Fund’s total annual fund operating expenses (excluding the fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, out-of-pocket transfer agency/shareholder servicing costs, including networking/omnibus/shareholder servicing fees payable by any share class, acquired fund fees and expenses, interest, dividends, taxes, brokerage commissions, and extraordinary expenses) exceed 0.77% for at least a one-year period commencing on October 28, 2026. This fee waiver and/or reimbursement may be revised,</span><span style="font-family:Times New Roman;font-size:7.60pt;line-height:9.50pt;"> </span><span style="font-family:Times New Roman;font-size:7.60pt;">extended, or terminated only at the discretion of the Board of Trustees.</span> | |||
| Class A | ||||
| Prospectus [Line Items] | ||||
| Management Fees (as a percentage of Assets) | 0.75% | |||
| Distribution and Service (12b-1) Fees | 0.25% | |||
| Other Expenses (as a percentage of Assets): | 0.23% | |||
| Expenses (as a percentage of Assets) | 1.23% | |||
| Fee Waiver or Reimbursement | (0.14%) | [1] | ||
| Net Expenses (as a percentage of Assets) | 1.09% | [1] | ||
| Class C | ||||
| Prospectus [Line Items] | ||||
| Management Fees (as a percentage of Assets) | 0.75% | |||
| Distribution and Service (12b-1) Fees | 1.00% | |||
| Other Expenses (as a percentage of Assets): | 0.31% | |||
| Expenses (as a percentage of Assets) | 2.06% | |||
| Fee Waiver or Reimbursement | (0.21%) | [1] | ||
| Net Expenses (as a percentage of Assets) | 1.85% | [1] | ||
| Class S | ||||
| Prospectus [Line Items] | ||||
| Management Fees (as a percentage of Assets) | 0.75% | |||
| Distribution and Service (12b-1) Fees | 0.25% | |||
| Other Expenses (as a percentage of Assets): | 1.45% | |||
| Expenses (as a percentage of Assets) | 2.45% | |||
| Fee Waiver or Reimbursement | (1.18%) | [1] | ||
| Net Expenses (as a percentage of Assets) | 1.27% | [1] | ||
| Class I | ||||
| Prospectus [Line Items] | ||||
| Management Fees (as a percentage of Assets) | 0.75% | |||
| Distribution and Service (12b-1) Fees | 0.00% | |||
| Other Expenses (as a percentage of Assets): | 0.25% | |||
| Expenses (as a percentage of Assets) | 1.00% | |||
| Fee Waiver or Reimbursement | (0.13%) | [1] | ||
| Net Expenses (as a percentage of Assets) | 0.87% | [1] | ||
| Class N | ||||
| Prospectus [Line Items] | ||||
| Management Fees (as a percentage of Assets) | 0.75% | |||
| Distribution and Service (12b-1) Fees | 0.00% | |||
| Other Expenses (as a percentage of Assets): | 0.23% | |||
| Expenses (as a percentage of Assets) | 0.98% | |||
| Fee Waiver or Reimbursement | (0.21%) | [1] | ||
| Net Expenses (as a percentage of Assets) | 0.77% | [1] | ||
| Class T | ||||
| Prospectus [Line Items] | ||||
| Management Fees (as a percentage of Assets) | 0.75% | |||
| Distribution and Service (12b-1) Fees | 0.00% | |||
| Other Expenses (as a percentage of Assets): | 0.42% | |||
| Expenses (as a percentage of Assets) | 1.17% | |||
| Fee Waiver or Reimbursement | (0.15%) | [1] | ||
| Net Expenses (as a percentage of Assets) | 1.02% | [1] | ||
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