v3.26.3
Janus Henderson Government Money Market Fund Annual Fund Operating Expenses - Class D Shares [Member] - Janus Henderson Government Money Market Fund
Jun. 30, 2026
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 and/or reimburse operating expenses to the extent that the Fund’s total annual fund operating expenses (excluding brokerage commissions, interest, dividends, taxes, acquired fund fees and expenses, and extraordinary expenses) exceed 0.33% 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 D  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.20%
Other Expenses (as a percentage of Assets): 0.21%
Expenses (as a percentage of Assets) 0.41%
Fee Waiver or Reimbursement (0.08%) [1]
Net Expenses (as a percentage of Assets) 0.33% [1]
[1] The Adviser has contractually agreed to waive and/or reimburse operating expenses to the extent that the Fund’s total annual fund operating expenses (excluding brokerage commissions, interest, dividends, taxes, acquired fund fees and expenses, and extraordinary expenses) exceed 0.33% for at least a one-year period commencing on October 28, 2026. This fee waiver and/or reimbursement may be revised, extended, or terminated only at the discretion of the Board of Trustees.