2.2.0.25truefalse0100006 - Document - Risk/Return Summary - Janus Worldwide Fund (Class A, C, S, I, R & T Shares) {Unlabeled}falsefalsefalse1falsefalsetruefalse{dei_DocumentInformationDocumentAxis} : Janus Worldwide Fund [Member]
{dei_LegalEntityAxis} : Global & International - Class A, C, S, I, R and T Shares [Member]
1/29/2010 - 1/28/2011
TwelveMonthsEnded_28Jan2011_S000010489_Member_Prospectus_One_Memberhttp://www.sec.gov/CIK0000277751duration2010-01-29T00:00:002011-01-28T00:00:00falsefalseJanus Worldwide Fund [Member]dei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldijif277751_S000010489Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseGlobal & International - Class A, C, S, I, R and T Shares [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldijif277751_ProspectusOneMemberdei_LegalEntityAxisexplicitMember1false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://janus.com/role/riskreturnsummaryjanusworldwidefund1falsefalsefalse00Janus Worldwide Fund [Member] | Global & International - Class A, C, S, I, R and T Shares [Member]Janus Worldwide Fund [Member] | Global & International - Class A, C, S, I, R and T Shares [Member]falsefalsefalsefalsefalse1falsefalsetruefalse{dei_DocumentInformationDocumentAxis} : Janus Worldwide Fund [Member]
{dei_LegalEntityAxis} : Global & International - Class A, C, S, I, R and T Shares [Member]
1/29/2010 - 1/28/2011
TwelveMonthsEnded_28Jan2011_S000010489_Member_Prospectus_One_Memberhttp://www.sec.gov/CIK0000277751duration2010-01-29T00:00:002011-01-28T00:00:00falsefalseJanus Worldwide Fund [Member]dei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldijif277751_S000010489Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseGlobal & International - Class A, C, S, I, R and T Shares [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldijif277751_ProspectusOneMemberdei_LegalEntityAxisexplicitMemberOthernaNo definition available.No authoritative reference available.falsefalse3false0jif277751_SupplementTextBlockjif277751falsenadurationSupplement.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<p><b>Janus Investment Fund</b></p><p>Janus Worldwide Fund</p>Supplement dated March 3, 2011<br/> to Currently Effective Prospectuses<p>Effective May 16, 2011, the following changes apply as noted.</p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringSupplement.No authoritative reference available.falsefalse4false0jif277751_SupplementObjectiveTextBlockjif277751falsenadurationSupplement Objective.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse001. The following replaces the corresponding information in its entirety under <b>“Investment Objective”</b> in the <b>Fund Summary</b> section of the Prospectus for the Fund:falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringSupplement Objective.No authoritative reference available.falsefalse5false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<b>Janus Worldwide Fund</b> seeks long-term growth of capital.falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 2
-Subsection a
falsefalse6false0jif277751_SupplementPrincipalInvestmentStrategyTextBlockjif277751falsenadurationSupplement Principal Investment Strategy.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<p>2. The following replaces the corresponding information under <b>“Principal Investment Strategies”</b> in the <b>Fund Summary</b> section of the Prospectus for the Fund:</p>
<p><b>Principal Investment Strategies</b></p><p>The Fund pursues its investment objective by investing primarily in equity securities, which include, but are not limited to, common stocks, preferred stocks, and depositary receipts of companies of any size located throughout the world. The Fund normally invests in issuers from several different countries, including the United States. The Fund may, under unusual circumstances, invest in a single country. The Fund may have significant exposure to emerging markets. The Fund may also invest in foreign equity and debt securities.</p><p>The portfolio manager applies a “bottom up” approach in choosing investments. In other words, the portfolio manager looks at companies one at a time to determine if a company is an attractive investment opportunity and if it is consistent with the Fund’s investment policies.</p><p>The Fund may invest a significant portion of its assets in derivatives, which are instruments that have a value derived from an underlying asset, such as stocks, bonds, commodities, currencies, interest rates, or market indices, as substitutes for securities in which the Fund invests. The Fund intends to invest in derivative instruments (by taking long and/or short positions) including, but not limited to, put and call options, swaps, and forward currency contracts to increase or decrease the Fund’s exposure to a particular market, to manage or adjust the risk profile of the Fund, and to earn income and enhance returns. The Fund may also invest in derivative instruments for other purposes, including hedging (to offset risks associated with an investment, currency exposure, or market conditions).</p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringSupplement Principal Investment Strategy.No authoritative reference available.falsefalse15Risk/Return Summary - Janus Worldwide Fund (Class A, C, S, I, R & T Shares) (Janus Worldwide Fund [Member], Global & International - Class A, C, S, I, R and T Shares [Member])UnKnownUnKnownUnKnownUnKnownfalsetrue