Investment Risks - Janus Henderson International Core Alpha ETF |
Sep. 14, 2026 |
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| Market Risk | |||||||||
| Prospectus [Line Items] | |||||||||
| Risk [Text Block] | Market Risk. The value of the Fund’s portfolio may decrease due to short-term market movements and over more prolonged market downturns. As a result, the Fund’s NAV may decrease. Market risk may affect a single issuer, industry, economic sector, or the market as a whole. Market risk may be magnified if certain social, political, economic, and other conditions and events (such as financial institution failures, economic recessions, tariffs, trade disputes, terrorism, war, armed conflicts, including related sanctions, social unrest, natural disasters, and epidemics and pandemics) adversely interrupt the global economy and financial markets. It is important to understand that the value of your investment may fall, sometimes sharply, in response to changes in the market, and you could lose money. |
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| Foreign Exposure Risk | |||||||||
| Prospectus [Line Items] | |||||||||
| Risk [Text Block] | Foreign Exposure Risk. Foreign markets can be more volatile than the U.S. market. As a result, the Fund’s returns and NAV may be affected by fluctuations in currency exchange rates or political or economic conditions in a particular country. Investments in foreign securities, particularly those of issuers located in emerging market countries, tend to have greater exposure to liquidity risk than domestic securities. In some foreign markets, there may not be protection against failure by other parties to complete transactions. It may not be possible for the Fund to repatriate capital, dividends, interest, and other income from a particular country or governmental entity. In addition, a market swing in one or more countries or regions where the Fund has invested a significant amount of its assets may have a greater effect on the Fund’s performance than it would in a more geographically diversified portfolio. |
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| Currency Risk | |||||||||
| Prospectus [Line Items] | |||||||||
| Risk [Text Block] | Currency Risk. Currency risk is the risk that changes in the exchange rate between currencies will adversely affect the value (in U.S. dollar terms) of an investment. As long as the Fund holds a foreign security, its value will be affected by the value of the local currency relative to the U.S. dollar. When the Fund sells a foreign currency denominated security, its value may be worth less in U.S. dollars even if the security increases in value in its home country. U.S. dollar-denominated securities of foreign issuers may also be affected by currency risk, as the value of these securities may also be affected by changes in the issuer’s local currency. |
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| Equity Securities Risk | |||||||||
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| Risk [Text Block] | Equity Securities Risk. Equity securities are subject to changes in value, and their values may be more volatile than those of other asset classes. The value of the Fund’s portfolio may decrease if the value of an individual company or security, or multiple companies or securities, in the portfolio decreases. Further, regardless of how well individual companies or securities perform, the value of the Fund’s portfolio could also decrease if there are deteriorating economic or market conditions or perceptions regarding the industries in which the issuers of securities the Fund holds participate. |
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| Industry and Sector Risk | |||||||||
| Prospectus [Line Items] | |||||||||
| Risk [Text Block] | Industry and Sector Risk. The Fund may have a significant portion of its assets invested in securities of companies conducting similar business or businesses within the same economic sector. Companies in the same industry or economic sector may be similarly affected by negative economic or market events, making the Fund more vulnerable to unfavorable developments than funds that invest more broadly. As the Fund’s portfolio becomes more concentrated, the Fund is less able to spread risk and potentially reduce the risk of loss and volatility. As the Fund’s holdings change over time, the Fund’s exposure to a particular economic sector may fluctuate. |
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| Concentration Risk | |||||||||
| Prospectus [Line Items] | |||||||||
| Risk [Text Block] | Concentration Risk. The Fund will not invest more than 25% of the value of its total assets in the securities of companies within the same industry, except that, to the extent that an industry represents 20% or more of the Fund’s performance benchmark index at the time of investment, the Fund may invest up to 35% of its assets in that industry. To the extent the Fund invests a substantial portion of its assets in an industry or group of industries, market or economic factors impacting that industry or group of industries could have significant effect on the value of the Fund’s investments. Companies in the same or similar industries may share common characteristics and are more likely to react similarly to industry-specific market or economic developments. Additionally, the Fund’s performance may be more volatile when its investments are less diversified across industries. |
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| Portfolio Management Risk | |||||||||
| Prospectus [Line Items] | |||||||||
| Risk [Text Block] | Portfolio Management Risk. The Fund is an actively managed investment portfolio and is therefore subject to the risk that the investment strategies employed for the Fund may fail to produce the intended results. Accordingly, the Fund may underperform benchmark indices or other funds with similar investment objectives. |
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| Securities Lending Risk | |||||||||
| Prospectus [Line Items] | |||||||||
| Risk [Text Block] | Securities Lending Risk. Securities lending involves a risk of loss because the borrower may fail to return the securities in a timely manner or at all. If the Fund lends its securities and is unable to recover the securities loaned, it may sell the collateral and purchase a replacement security in the market. Lending securities entails a risk of loss to the Fund if and to the extent that the market value of the loaned securities increases and the collateral is not increased accordingly. Any cash received as collateral for loaned securities will be invested in an affiliated or non-affiliated cash management vehicle or time deposits. This investment is subject to market appreciation or depreciation and the Fund will bear any loss on the investment of its cash collateral. |
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| New Smaller Sized Fund Risk | |||||||||
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| Risk [Text Block] | New/Smaller Sized Fund Risk. Because the Fund is relatively new, it has a limited operating history and a small asset base. The Fund’s performance may not represent how the Fund is expected to or may perform in the long term if and when it becomes larger. If the Fund were to fail to attract sufficient assets to achieve or maintain economies of scale, performance may be negatively impacted, and any resulting liquidation could create negative transaction costs for the Fund and tax consequences for investors. |
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| ETF Risks | |||||||||
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| Risk [Text Block] | ETF Risks. The Fund is an exchange-traded fund (“ETF”), and, as a result of the Fund utilizing an ETF’s structure, it is exposed to the following risks:
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| Risk Lose Money [Member] | |||||||||
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| Risk [Text Block] | The biggest risk is that the Fund’s returns and yields will vary, and you could lose money. | ||||||||
| Risk Not Insured Depository Institution [Member] | |||||||||
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| Risk [Text Block] | An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||
| Risk Nondiversified Status [Member] | |||||||||
| Prospectus [Line Items] | |||||||||
| Risk [Text Block] | Nondiversification Risk. The Fund is classified as nondiversified under the Investment Company Act of 1940, as amended (the “1940 Act”). This gives the Fund’s portfolio management more flexibility to hold larger positions in securities than a fund that is classified as diversified. As a result, an increase or decrease in the value of a single security held by the Fund may have a greater impact on the Fund’s net asset value (“NAV”) and total return. |