XML 14 R5.htm IDEA: XBRL DOCUMENT v2.4.0.6
Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType Other
Document Period End Date dei_DocumentPeriodEndDate Dec. 14, 2011
Registrant Name dei_EntityRegistrantName JANUS INVESTMENT FUND
Central Index Key dei_EntityCentralIndexKey 0000277751
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Mar. 30, 2012
Document Effective Date dei_DocumentEffectiveDate Apr. 02, 2012
Prospectus Date rr_ProspectusDate Dec. 15, 2011
INTECH Global Dividend Fund | Class A, C, S, I, T Shares
  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] jif277751_SupplementTextBlock
Janus Investment Fund
INTECH Global Dividend Fund
Supplement dated March 30, 2012
to Currently Effective Prospectuses
Effective April 2, 2012, the following replaces in its entirety the corresponding information for INTECH Global Dividend Fund (the “Fund”) found under “Annual Fund Operating Expenses” in the Fund Summary section of the Fund’s Prospectus to reflect the implementation of a lower expense limit.
ANNUAL FUND OPERATING EXPENSES rr_OperatingExpensesAbstract  
Operating Expenses Caption [Text] rr_OperatingExpensesCaption ANNUAL FUND OPERATING EXPENSES
(expenses that you pay each year as a percentage of the value of your investment)
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Since the Fund is new, Other Expenses are based on the estimated expenses that the Fund expects to incur in its initial fiscal period.
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination November 1, 2013
INTECH Global Dividend Fund | Class A, C, S, I, T Shares | Class A
  
ANNUAL FUND OPERATING EXPENSES rr_OperatingExpensesAbstract  
Operating Expenses Column [Text] rr_OperatingExpensesColumnName Class A
Management Fees rr_ManagementFeesOverAssets 0.55%
Distribution/Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.88% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.68% [2]
Fee Waiver rr_FeeWaiverOrReimbursementOverAssets 0.91% [2]
Net Annual Fund Operating Expenses After Fee Waiver rr_NetExpensesOverAssets 0.77% [2]
INTECH Global Dividend Fund | Class A, C, S, I, T Shares | Class C
  
ANNUAL FUND OPERATING EXPENSES rr_OperatingExpensesAbstract  
Operating Expenses Column [Text] rr_OperatingExpensesColumnName Class C
Management Fees rr_ManagementFeesOverAssets 0.55%
Distribution/Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.90% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.45% [2]
Fee Waiver rr_FeeWaiverOrReimbursementOverAssets 0.93% [2]
Net Annual Fund Operating Expenses After Fee Waiver rr_NetExpensesOverAssets 1.52% [2]
INTECH Global Dividend Fund | Class A, C, S, I, T Shares | Class S
  
ANNUAL FUND OPERATING EXPENSES rr_OperatingExpensesAbstract  
Operating Expenses Column [Text] rr_OperatingExpensesColumnName Class S
Management Fees rr_ManagementFeesOverAssets 0.55%
Distribution/Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 1.03% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.83% [2]
Fee Waiver rr_FeeWaiverOrReimbursementOverAssets 0.81% [2]
Net Annual Fund Operating Expenses After Fee Waiver rr_NetExpensesOverAssets 1.02% [2]
INTECH Global Dividend Fund | Class A, C, S, I, T Shares | Class I
  
ANNUAL FUND OPERATING EXPENSES rr_OperatingExpensesAbstract  
Operating Expenses Column [Text] rr_OperatingExpensesColumnName Class I
Management Fees rr_ManagementFeesOverAssets 0.55%
Distribution/Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.85% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.40% [2]
Fee Waiver rr_FeeWaiverOrReimbursementOverAssets 0.88% [2]
Net Annual Fund Operating Expenses After Fee Waiver rr_NetExpensesOverAssets 0.52% [2]
INTECH Global Dividend Fund | Class A, C, S, I, T Shares | Class T
  
ANNUAL FUND OPERATING EXPENSES rr_OperatingExpensesAbstract  
Operating Expenses Column [Text] rr_OperatingExpensesColumnName Class T
Management Fees rr_ManagementFeesOverAssets 0.55%
Distribution/Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 1.03% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.58% [2]
Fee Waiver rr_FeeWaiverOrReimbursementOverAssets 0.81% [2]
Net Annual Fund Operating Expenses After Fee Waiver rr_NetExpensesOverAssets 0.77% [2]
INTECH Global Dividend Fund | Class D Shares
  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] jif277751_SupplementTextBlock
Janus Investment Fund
INTECH Global Dividend Fund
Class D Shares
Supplement dated March 30, 2012
to Currently Effective Prospectuses
Effective April 2, 2012, the following replaces in its entirety the corresponding information for INTECH Global Dividend Fund (the “Fund”) found under “Annual Fund Operating Expenses” in the Fund Summary section of the Fund’s Prospectus to reflect the implementation of a lower expense limit.
ANNUAL FUND OPERATING EXPENSES rr_OperatingExpensesAbstract  
Operating Expenses Caption [Text] rr_OperatingExpensesCaption ANNUAL FUND OPERATING EXPENSES
(expenses that you pay each year as a percentage of the value of your investment)
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Since the Fund is new, Other Expenses are based on the estimated expenses that the Fund expects to incur in its initial fiscal period.
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination November 1, 2013
INTECH Global Dividend Fund | Class D Shares | Class D
  
ANNUAL FUND OPERATING EXPENSES rr_OperatingExpensesAbstract  
Operating Expenses Column [Text] rr_OperatingExpensesColumnName Class D
Management Fees rr_ManagementFeesOverAssets 0.55%
Other Expenses rr_OtherExpensesOverAssets 0.94% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.49% [3]
Fee Waiver rr_FeeWaiverOrReimbursementOverAssets 0.83% [3]
Net Annual Fund Operating Expenses After Fee Waiver rr_NetExpensesOverAssets 0.66% [3]
[1] Since the Fund is new, Other Expenses are based on the estimated expenses that the Fund expects to incur in its initial fiscal period.
[2] Janus Capital has contractually agreed to waive the Fund's total annual fund operating expenses (excluding the distribution and shareholder servicing fees - applicable to Class A Shares, Class C Shares, and Class S Shares; administrative services fees payable pursuant to the Transfer Agency Agreement (except for networking and omnibus fees); brokerage commissions; interest; dividends; taxes; acquired fund fees and expenses; and extraordinary expenses) to 0.50% until at least November 1, 2013. The contractual waiver may be terminated or modified prior to this date only at the discretion of the Board of Trustees. For a period of three years subsequent to the Fund's commencement of operations, Janus Capital may recover from the Fund fees and expenses previously waived or reimbursed, which could then be considered a deferral, if the Fund's expense ratio, including recovered expenses, falls below the expense limit.
[3] Janus Capital has contractually agreed to waive the Fund's total annual fund operating expenses (excluding administrative services fees payable pursuant to the Transfer Agency Agreement, brokerage commissions, interest, dividends, taxes, acquired fund fees and expenses, and extraordinary expenses) to 0.50% until at least November 1, 2013. The contractual waiver may be terminated or modified prior to this date only at the discretion of the Board of Trustees. For a period of three years subsequent to the Fund's commencement of operations, Janus Capital may recover from the Fund fees and expenses previously waived or reimbursed, which could then be considered a deferral, if the Fund's expense ratio, including recovered expenses, falls below the expense limit.