Investment Risks	Sep. 30, 2024
(Eaton Vance CLO Investment Grade Income ETF) \| Risk Lose Money [Member]
Prospectus [Line Items]
Risk [Text Block]	There is no assurance that the Fund will achieve its investment objective, and you can lose money investing in this Fund.
(Eaton Vance CLO Investment Grade Income ETF) \| Risk Not Insured Depository Institution [Member]
Prospectus [Line Items]
Risk [Text Block]	Shares of the Fund are not bank deposits and are not guaranteed or insured by the Federal Deposit Insurance Corporation or any other government agency.
(Eaton Vance CLO Investment Grade Income ETF) \| Risk Nondiversified Status [Member]
Prospectus [Line Items]
Risk [Text Block]	• Non-Diversification. The Fund is non-diversified, which means that the Fund may invest a greater percentage of its assets in a smaller number of issuers than a diversified fund. Because the Fund is non-diversified, it may be more susceptible to an adverse event affecting a single issuer or portfolio investment than a diversified portfolio and a decline in the value of that issuer’s securities or that portfolio investment may cause the Fund’s overall value to decline to a greater degree than a diversified portfolio.
(Eaton Vance CLO Investment Grade Income ETF) \| Collateralized Loan Obligations Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• Collateralized Loan Obligations Risk. CLOs are a type of asset-backed security that is typically structured as a trust collateralized by a pool of loans. The cash flows from the trust are split into two or more portions, called tranches, varying in risk and yield. The risks of an investment in a CLO depend largely on the type of the collateral securities and the class or tranche of the instrument in which the Fund invests. In addition to the risks normally associated with fixed income securities, such as interest rate risk, default risk, credit risk and liquidity risk, CLOs carry additional risks including, but not limited to: (i) the possibility that distributions from collateral securities will not be adequate to make interest or other payments; (ii) the quality of the collateral may decline in value or default; (iii) the Fund may invest in CLOs that are subordinate to other classes; and (iv) the complex structure of the security may not be fully understood at the time of investment and may produce disputes with the issuer or unexpected investment results. The Fund and other investors in CLOs ultimately bear the credit and interest rate risks of the underlying collateral. CLOs, and their underlying loan obligations, are typically not registered for sale to the public and therefore are subject to certain restrictions on transfer and sale, potentially subjecting them to increased liquidity risk as compared to other types of securities. As a result, the proceeds from the sale of CLO securities may not be readily available to meet the Fund’s redemption or other obligations and the Fund may be unable to acquire or dispose of the securities at a price and time the Fund deems advantageous. CLOs in which the Fund invests may be managed by investment advisers not affiliated with the Adviser. CLO managers are responsible for selecting, managing and replacing the underlying bank loans within a CLO. CLO managers may have limited operating histories and, may be subject to conflicts of interests, including managing the assets of other clients or other investment vehicles, or receiving fees that incentivize maximizing the yield, and indirectly the risk, of a CLO. Adverse developments with respect to a CLO manager may adversely impact the performance of the CLO securities in which the Fund invests.
(Eaton Vance CLO Investment Grade Income ETF) \| Loan Risks [Member]
Prospectus [Line Items]
Risk [Text Block]	• Loan Risks. Investments in loans are subject to the risks generally associated with other debt obligations (such as credit and interest rate risk). Loans are also subject to additional risks, including subordination to other creditors, no collateral or limited rights in collateral, increased liquidity risks and lack of publicly available information. Loans are subject to the risk of default in the payment of interest or principal, which will result in a reduction of income or other losses to the Fund, and a potential decrease in the Fund’s NAV. Loans are traded in a private, unregulated inter-dealer or interbank resale market and are generally subject to contractual restrictions that must be satisfied before a loan can be bought or sold. These restrictions may impede the Fund’s ability to buy or sell loans (thus affecting their liquidity) and may negatively impact the transaction price. It also may take longer than seven days for transactions in loans to settle. Due to the possibility of an extended loan settlement process, the Fund may hold additional cash, sell investments or temporarily borrow from banks or other lenders to meet short-term liquidity needs. The types of covenants included in loan agreements generally vary depending on market conditions, the creditworthiness of the issuer, the nature of the collateral securing the loan and possibly other factors. Loans with fewer covenants that restrict activities of the borrower may provide the borrower with more flexibility to take actions that may be detrimental to the loan holders and provide fewer investor protections in the event of such actions or if covenants are breached. The Fund may experience relatively greater realized or unrealized losses or delays and expense in enforcing its rights with respect to loans with fewer restrictive covenants. Loans to entities located outside of the U.S. may have substantially different lender protections and covenants as compared to loans to U.S. entities and generally involve greater and additional risks. The Fund may have difficulties and incur expense enforcing its rights with respect to loans and non-U.S. loans could be subject to bankruptcy laws that are materially different than in the U.S. Loans may be structured such that they are not securities under securities laws, and in the event of fraud or misrepresentation by a borrower, lenders may not have the protection of the anti-fraud provisions of the federal securities laws. Loans are also subject to risks associated with other types of income investments, including credit risk and risks of lower rated investments. In addition, bank loans are subject to the risk of default in the payment of interest or principal on a loan, which will result in a reduction of income to the Fund, and a potential decrease in the Fund’s NAV. The risk of default on loans will increase in the event of an economic downturn or a substantial increase in interest rates. Because some loans rank lower in priority of payment to other loans and other obligations, such loans present a greater degree of investment risk and may exhibit greater price volatility.
(Eaton Vance CLO Investment Grade Income ETF) \| Covenant Lite Loans [Member]
Prospectus [Line Items]
Risk [Text Block]	• Covenant Lite Loans. Some of the loans or other obligations in which the Fund may invest or obtain exposure to may be “covenant lite” loans or other obligations. Certain financial institutions may define “covenant lite” loans or securities differently. Covenants contained in loan documentation are intended to protect lenders and investors by imposing certain restrictions and other limitations on a borrower’s operations or assets and by providing certain information and consent rights to lenders. Covenant lite loans or securities, which have varied terms and conditions, may contain fewer or no restrictive covenants compared to other loans that might enable the Fund to, among other things, proactively enforce financial covenants or prevent undesired actions by the borrower. As a result, covenant lite loans generally carry greater risks because they allow borrowers to exercise more flexibility with respect to certain activities that may otherwise be limited or prohibited under similar loan obligations that are not covenant lite. In addition, the Fund may receive less or less frequent financial reporting from a borrower under a covenant-lite obligation, which may result in more limited access to financial information, difficulty evaluating the borrower’s financial performance over time and delays in exercising rights and remedies in the event of a significant financial decline. The Fund may experience relatively greater difficulty or delays in enforcing its rights on its holdings of certain covenant lite loans and other similar obligations than its holdings of loans or securities with more traditional financial covenants, which may result in losses to the Fund. Many loans and similar debt obligations may not feature traditional financial maintenance covenants, which are intended to protect lenders and investors by imposing certain restrictions and other limitations on a borrower’s operations or assets and by providing certain information and consent rights to lenders.
(Eaton Vance CLO Investment Grade Income ETF) \| Liquidity [Member]
Prospectus [Line Items]
Risk [Text Block]	• Liquidity. The Fund may make investments that are less liquid, illiquid or restricted or that may become illiquid or less liquid in response to overall economic conditions or adverse investor perceptions, and which may entail greater risk than investments in other types of securities. These investments may be more difficult to value or sell, particularly in times of market turmoil, and there may be little trading in the secondary market available for particular securities. Liquidity risk may be magnified in a market where credit spread and interest rate volatility is rising and where investor redemptions from fixed-income funds may be higher than normal. If the Fund is forced to sell an illiquid or restricted security to fund redemptions or for other cash needs, it may be forced to sell the security at a loss or for less than its fair value and may be unable to sell the security at all. Certain CLO securities may have limited liquidity in various market conditions, and in such instances will be less liquid than more senior or higher-rated CLOs. The price of CLO securities may rapidly decline if a large number of holders of the CLO securities decide to sell. The CLO market is smaller relative to other fixed-income instrument markets. Historic liquidity measures of CLOs may or may not be predictive of the liquidity of CLOs in the future. During adverse market conditions, there may be instances in which the market for trading CLOs becomes thin, or in extreme circumstances, particularly with respect to subordinate or lower-rated CLO tranches, may cease to exist during such period.
(Eaton Vance CLO Investment Grade Income ETF) \| Asset-Backed Securities [Member]
Prospectus [Line Items]
Risk [Text Block]	• Asset-Backed Securities. Asset-backed securities are subject to credit (such as a borrower’s default on its mortgage obligation and the default or failure of a guarantee underlying the asset-backed security), interest rate and certain additional risks, including the risk that various federal and state consumer laws and other legal and economic factors may result in the collateral backing the securities being insufficient to support payment on the securities. To the extent the Fund invests in asset-backed securities issued by non-governmental issuers, such as commercial banks, savings and loan institutions, and other secondary market issuers, the Fund will be exposed to additional risks because, among other things, there are no direct or indirect government or agency guarantees of payments in the pools underlying the securities. Some asset-backed securities also entail prepayment risk and extension risk, which may vary depending on the type of asset. Due to these and other risks, asset-backed securities may become more volatile in certain interest rate environments.
(Eaton Vance CLO Investment Grade Income ETF) \| Fixed Income Securities [Member]
Prospectus [Line Items]
Risk [Text Block]	• Fixed-Income Securities. Fixed-income securities are subject to the risk of the issuer’s inability to meet principal and interest payments on its obligations (i.e., credit risk) and are subject to price volatility resulting from, among other things, interest rate sensitivity (i.e., interest rate risk), market perception of the creditworthiness of the issuer and general market liquidity (i.e., market risk). For example, a type of fixed-income securities in which the Fund may invest are corporate debt obligations. In addition to interest rate, credit and other risks, corporate debt obligations are also subject to factors directly related to the issuer, such as the credit rating of the corporation, the corporation’s performance and perceptions of the corporation in the marketplace, and by factors not directly related to the issuer, such as general market liquidity, economic conditions and inflation. The Fund may face a heightened level of interest rate risk in times of monetary policy change and/or uncertainty, such as when the Federal Reserve Board adjusts a quantitative easing program and/or changes rates. A changing interest rate environment increases certain risks, including the potential for periods of volatility, increased redemptions, shortened durations (i.e., prepayment risk) and extended durations (i.e., extension risk). The Fund is not limited as to the maturities (when a debt security provides its final payment) or durations (measure of interest rate sensitivity) of the securities in which it may invest. Securities with longer durations are likely to be more sensitive to changes in interest rates, generally making them more volatile than securities with shorter durations. Lower rated fixed-income securities have greater volatility because there is less certainty that principal and interest payments will be made as scheduled. The Fund may be subject to certain liquidity risks that may result from the lack of an active market and the reduced number and capacity of traditional market participants to make a market in fixed-income securities.
(Eaton Vance CLO Investment Grade Income ETF) \| Credit and Interest Rate Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• Credit and Interest Rate Risk. Credit risk refers to the possibility that the issuer or guarantor of a security, or counterparty to a transaction, will be unable or unwilling or perceived to be unable or unwilling to make interest payments and/or repay the principal on its debt or otherwise honor its obligations, including the risk of default. In such instances, the value of the Fund could decline and the Fund could lose money. If an issuer’s, guarantor’s or counterparty’s financial condition worsens, the credit quality of the issuer, guarantor or counterparty may deteriorate. Credit ratings may not be an accurate assessment of financial condition, liquidity or credit risk. Although credit ratings may not accurately reflect the true credit risk of an instrument, a change in the credit rating of an instrument or an issuer, guarantor or counterparty, or the market’s perception of the creditworthiness of an instrument or issuer, guarantor or counterparty can have a rapid, adverse effect on the instrument’s value and liquidity and make it more difficult for the Fund to sell at an advantageous price or time. Interest rate risk refers to the decline in the value of a fixed-income security resulting from changes in the general level of interest rates. A wide variety of market and economic factors can cause interest rates to rise or fall, including central bank monetary policy, rising inflation, disinflation or deflation, and changes in general economic conditions. When the general level of interest rates goes up, the prices of most fixed-income securities go down. When the general level of interest rates goes down, the prices of most fixed-income securities go up but the yield or income from new issuances of fixed-income securities generally decreases. Securities with longer durations will generally be more sensitive to changes in interest rates than securities with shorter durations. Fluctuations in interest rates may also affect the liquidity of and income generated by fixed-income instruments held by the Fund. The Fund may invest in variable and floating rate loans and other variable and floating rate securities. Although the value of these instruments are generally less sensitive to interest rate changes than fixed rate instruments, the value of variable and floating rate loans and other securities may decline if their interest rates do not rise as quickly, or as much, as general interest rates. The Fund may face a heightened level of interest rate risk in times of monetary policy change and/or uncertainty, such as when the Federal Reserve Board adjusts a quantitative easing program and/or changes rates. Changing interest rates may have unpredictable effects on the markets and may detract from Fund performance. A changing interest rate environment increases certain risks, including the potential for periods of market volatility, increased redemptions, shortened durations (i.e., prepayment risk) and extended durations (i.e., extension risk).
(Eaton Vance CLO Investment Grade Income ETF) \| High Yield Securities (“Junk Bonds”) [Member]
Prospectus [Line Items]
Risk [Text Block]	• High Yield Securities (“Junk Bonds”). The Fund’s investments in high yield securities expose it to increased risks, including a substantial degree of credit and default risks. High yield securities may be issued by companies that are restructuring, are smaller and less creditworthy or are more highly leveraged or indebted than other companies or are financially distressed, and therefore they typically have more difficulty making scheduled payments of principal and interest than issuers of higher rated investments. High yield securities are subject to greater risk of loss (including substantial or total loss) of income and principal than higher rated securities and are considered speculative because of increased credit risk relative to higher rated fixed income investments. High yield securities are also subject to greater price volatility, including sudden and substantial decreases in price, and less liquidity than higher rated securities. High yield securities are particularly sensitive to adverse economic, market, industry or issuer-specific developments, which may result in an increased incidence of default. In the event of a default, the Fund may incur additional expenses to seek recovery or to negotiate new terms with a defaulting issuer.
(Eaton Vance CLO Investment Grade Income ETF) \| Foreign Securities [Member]
Prospectus [Line Items]
Risk [Text Block]	• Foreign Securities. The Fund may invest in U.S. dollar-denominated securities issued by foreign governmental or corporate issuers. Investing in securities of foreign issuers involves some additional risks than securities of U.S. issuers. While foreign securities, including foreign money market securities, are subject to the same type of risks that pertain to domestic issuers, namely credit risk and interest rate risk, they are also subject to other additional risks. Foreign issuers generally are subject to different accounting, auditing and financial reporting standards than U.S. issuers. There may be less information available to the public about foreign issuers. In some foreign countries, there is also the risk of government expropriation, excessive taxation, political or social instability, economic sanctions or other similar governmental activity or diplomatic developments (including regional and global, military or other conflicts) that could affect an investment. There also can be difficulty obtaining and enforcing judgments against issuers in foreign countries. Governmental interventions or other actions can have a significant effect on the economic conditions in foreign countries, which also may adversely affect the Fund’s investments in foreign issuers.
(Eaton Vance CLO Investment Grade Income ETF) \| Foreign Currency [Member]
Prospectus [Line Items]
Risk [Text Block]	• Foreign Currency. The Fund’s investments in foreign securities may be denominated in foreign currencies. The value of foreign currencies may fluctuate relative to the value of the U.S. dollar. Since the Fund may invest in such non-U.S. dollar-denominated securities, and therefore may convert the value of such securities into U.S. dollars, changes in currency exchange rates can increase or decrease the U.S. dollar value of the Fund’s assets. Currency exchange rates may fluctuate significantly over short periods of time for a number of reasons, including changes in interest rates and the overall economic health of the issuer. Devaluation of a currency by a country’s government or banking authority also will have a significant impact on the value of any investments denominated in that currency. The Adviser may use derivatives to reduce this risk. The Adviser may in their discretion choose not to hedge against currency risk. In addition, certain market conditions may make it impossible or uneconomical to hedge against currency risk.
(Eaton Vance CLO Investment Grade Income ETF) \| Derivatives [Member]
Prospectus [Line Items]
Risk [Text Block]	• Derivatives. Derivatives and other similar instruments that create synthetic exposure often are subject to risks similar to those of the underlying asset or instrument, including market risk, and may be subject to additional risks, including imperfect correlation between the value of the derivative and the underlying asset, risks of default by the counterparty to certain transactions, magnification of losses incurred due to changes in the market value of the securities, instruments, indices or interest rates to which the derivative instrument relates, risks that the transactions may not be liquid, risks arising from margin and payment requirements, risks arising from mispricing or valuation complexity and operational and legal risks. Certain derivative transactions may give rise to a form of leverage. Leverage magnifies the potential for gain and the risk of loss.
(Eaton Vance CLO Investment Grade Income ETF) \| Market and Geopolitical Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• Market and Geopolitical Risk. The value of your investment in the Fund is based on the values of the Fund’s investments, which change due to economic, geopolitical and other events that affect the U.S. and global markets generally, as well as those that affect or are perceived or expected to affect particular regions, countries, industries, companies, issuers, sectors, asset classes or governments. These types of events may be sudden and unexpected, and could adversely affect the value (or income generated by) and liquidity of the Fund’s investments, which may in turn impact the Fund’s ability to sell securities and/or its ability to meet redemptions. The risks associated with these developments may be magnified if certain social, political, economic and other conditions and events (such as war, natural disasters or events, epidemics and pandemics, terrorism, conflicts, social unrest, recessions, inflation, interest rate changes, supply chain disruptions and the threat or actual imposition of tariffs, trade barriers and other protectionist or retaliatory measures) adversely interrupt or otherwise affect the global economy and financial markets. It is difficult to predict when events affecting the U.S. or global financial markets or economies may occur, the effects that such events may have and the duration of those effects (which may last for extended periods). These types of events may negatively impact broad segments of businesses and populations and have a significant and rapid negative impact on the performance or value of the Fund’s investments, adversely affect and increase the volatility of the Fund’s share price and exacerbate pre-existing risks to the Fund. The frequency and magnitude of resulting changes in the value of the Fund’s investments cannot be predicted.
(Eaton Vance CLO Investment Grade Income ETF) \| Distressed and Defaulted Securities [Member]
Prospectus [Line Items]
Risk [Text Block]	• Distressed and Defaulted Securities. Distressed and defaulted securities are speculative and involve substantial risks in addition to the risks of investing in high yield securities. The Fund will generally not receive interest payments on the distressed securities and the repayment of principal may also be subject to increased risk. These securities may present a substantial risk of default or may be in default at the time of investment, requiring the Fund to incur additional costs. The repayment of defaulted securities is also subject to significant uncertainties. The Fund may incur substantial expenses in seeking recovery upon a default in the payment of principal of or interest on its portfolio holdings.
(Eaton Vance CLO Investment Grade Income ETF) \| LIBOR Discontinuance or Unavailability Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• LIBOR Discontinuance or Unavailability Risk. The Fund’s investments, payment obligations and financing terms may be based on floating rates, such as the London Interbank Offered Rates (collectively, “LIBOR”), Euro Interbank Offered Rate, Secured Overnight Financing Rate (“SOFR”) and other similar types of reference rates (each, a “Reference Rate”). These Reference Rates are generally intended to represent the rate at which contributing banks may obtain short-term borrowings from each other within certain financial markets. London Interbank Offered Rate (“LIBOR”) was the basic rate of interest used in lending transactions between banks on the London interbank market and has been widely used as a reference for setting the interest rate on loans globally. As a result of benchmark reforms, publication of LIBOR settings has ceased. Certain regulators and industry groups have taken actions to establish alternative reference rates (e.g., the SOFR, which measures the cost of overnight borrowings through repurchase agreement transactions collateralized with U.S. Treasury securities and is intended to replace U.S. dollar LIBORs with certain adjustments). These developments could negatively impact financial markets in general and present heightened risks, including with respect to the Fund’s investments. As a result of the uncertainty and developments relating to the transition process, performance, price volatility, liquidity and value of the Fund and its assets may be adversely affected.
(Eaton Vance CLO Investment Grade Income ETF) \| ETF Structure Risks [Member]
Prospectus [Line Items]
Risk [Text Block]	• ETF Structure Risks. Authorized Participant Concentration Risk. Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of intermediaries that act as authorized participants and none of these authorized participants is or will be obligated to engage in creation or redemption transactions. There can be no assurance that an active trading market for the Fund’s shares will develop or be maintained. To the extent that these intermediaries exit the business or are unable to or choose not to proceed with creation and/or redemption orders with respect to the Fund, such as during periods of market stress, and no other authorized participant creates or redeems, shares may trade at a discount to net asset value (“NAV”) per share and possibly face trading halts and/or delisting. Authorized participant concentration risk may be heightened to the extent the Fund invests in securities issued by non-U.S. issuers or other securities or instruments that have lower trading volumes. Cash Transactions Risk. Unlike certain ETFs, the Fund may effect creations and redemptions in cash or partially in cash. Therefore, it may be required to sell portfolio securities and subsequently recognize gains on such sales that the Fund might not have recognized if it were to distribute portfolio securities in-kind. As such, investments in shares may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind. Trading Risk. The market prices of shares are expected to fluctuate, in some cases materially, in response to changes in the Fund’s NAV, the intra-day value of the Fund’s holdings, and supply and demand for shares. The Adviser cannot predict whether shares will trade above, below or at their NAV. Disruptions to creations and redemptions, the existence of significant market volatility or potential lack of an active trading market for the shares (including through a trading halt), as well as other factors, may result in the shares trading significantly above (at a premium) or below (at a discount) to NAV or to the intraday value of the Fund’s holdings. You may pay significantly more or receive significantly less than the Fund’s NAV per share during periods when there is a significant premium or discount. Buying or selling shares in the secondary market may require paying brokerage commissions or other charges imposed by brokers as determined by that broker. Brokerage commissions are often a fixed amount and may be a significant proportional cost when seeking to buy or sell relatively small amounts of shares. In addition, the market price of shares, like the price of any exchange-traded security, includes a “bid-ask spread” charged by the market makers or other participants that trade the particular security. The spread of the Fund’s shares varies over time based on the Fund’s trading volume and market liquidity and may increase if the Fund’s trading volume, the spread of the Fund’s underlying securities, or market liquidity decrease.
(Eaton Vance CLO Investment Grade Income ETF) \| Active Management Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• Active Management Risk. In pursuing the Fund’s investment objective, the Adviser has considerable leeway in deciding which investments to buy, hold or sell on a day-to-day basis, and which trading strategies to use. For example, the Adviser, in its discretion, may determine to use some permitted trading strategies while not using others. The success or failure of such decisions will affect the Fund’s performance.
(Eaton Vance CLO Investment Grade Income ETF) \| Investment Company Securities [Member]
Prospectus [Line Items]
Risk [Text Block]	• Investment Company Securities. Subject to the limitations set forth in the Investment Company Act of 1940, as amended (the “1940 Act”), or as otherwise permitted by the SEC, the Fund may acquire shares in other investment companies, including foreign investment companies, closed-end funds, ETFs and money market funds which may be managed by the Adviser or its affiliates. The market value of the shares of other investment companies may differ from the NAV of the Fund. The shares of certain investment companies frequently trade at a discount to their NAV. As a shareholder in an investment company, the Fund would bear its ratable share of that entity’s expenses, including its investment advisory and administration fees, and be subject to the associated risks. At the same time, the Fund would continue to pay its own advisory and administration fees and other expenses. As a result, the Fund and its shareholders, in effect, will also be absorbing fees with respect to investments in other investment companies.
(Eaton Vance CLO Investment Grade Income ETF) \| New Fund Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• New Fund Risk. A new fund’s performance may not represent how the fund is expected to or may perform in the long term. In addition, new funds have limited operating histories for investors to evaluate and new funds may not attract sufficient assets to achieve investment and trading efficiencies.
(Eaton Vance High Income Municipal ETF) \| Risk Lose Money [Member]
Prospectus [Line Items]
Risk [Text Block]	There is no assurance that the Fund will achieve its investment objective, and you can lose money investing in this Fund.
(Eaton Vance High Income Municipal ETF) \| Risk Not Insured Depository Institution [Member]
Prospectus [Line Items]
Risk [Text Block]	Shares of the Fund are not bank deposits and are not guaranteed or insured by the Federal Deposit Insurance Corporation or any other government agency.
(Eaton Vance High Income Municipal ETF) \| Liquidity [Member]
Prospectus [Line Items]
Risk [Text Block]	• Liquidity. The Fund may make investments that are less liquid, illiquid or restricted or that may become illiquid or less liquid in response to overall economic conditions or adverse investor perceptions, and which may entail greater risk than investments in other types of securities. These investments may be more difficult to value or sell, particularly in times of market turmoil, and there may be little trading in the secondary market available for particular securities. Liquidity risk may be magnified in a market where credit spread and interest rate volatility is rising and where investor redemptions from fixed-income funds may be higher than normal. If the Fund is forced to sell an illiquid or restricted security to fund redemptions or for other cash needs, it may be forced to sell the security at a loss or for less than its fair value and may be unable to sell the security at all.
(Eaton Vance High Income Municipal ETF) \| Fixed Income Securities [Member]
Prospectus [Line Items]
Risk [Text Block]	• Fixed-Income Securities. Fixed-income securities are subject to the risk of the issuer’s inability to meet principal and interest payments on its obligations (i.e., credit risk) and are subject to price volatility resulting from, among other things, interest rate sensitivity (i.e., interest rate risk), market perception of the creditworthiness of the issuer and general market liquidity (i.e., market risk). For example, a type of fixed-income securities in which the Fund may invest are corporate debt obligations. In addition to interest rate, credit and other risks, corporate debt obligations are also subject to factors directly related to the issuer, such as the credit rating of the corporation, the corporation’s performance and perceptions of the corporation in the marketplace, and by factors not directly related to the issuer, such as general market liquidity, economic conditions and inflation. The Fund may face a heightened level of interest rate risk in times of monetary policy change and/or uncertainty, such as when the Federal Reserve Board adjusts a quantitative easing program and/or changes rates. A changing interest rate environment increases certain risks, including the potential for periods of volatility, increased redemptions, shortened durations (i.e., prepayment risk) and extended durations (i.e., extension risk). The Fund is not limited as to the maturities (when a debt security provides its final payment) or durations (measure of interest rate sensitivity) of the securities in which it may invest. Securities with longer durations are likely to be more sensitive to changes in interest rates, generally making them more volatile than securities with shorter durations. Lower rated fixed-income securities have greater volatility because there is less certainty that principal and interest payments will be made as scheduled. The Fund may be subject to certain liquidity risks that may result from the lack of an active market and the reduced number and capacity of traditional market participants to make a market in fixed-income securities.
(Eaton Vance High Income Municipal ETF) \| Credit and Interest Rate Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• Credit and Interest Rate Risk. Credit risk refers to the possibility that the issuer or guarantor of a security, or counterparty to a transaction, will be unable or unwilling or perceived to be unable or unwilling to make interest payments and/or repay the principal on its debt or otherwise honor its obligations, including the risk of default. In such instances, the value of the Fund could decline and the Fund could lose money. If an issuer’s, guarantor’s or counterparty’s financial condition worsens, the credit quality of the issuer, guarantor or counterparty may deteriorate. Credit ratings may not be an accurate assessment of financial condition, liquidity or credit risk. Although credit ratings may not accurately reflect the true credit risk of an instrument, a change in the credit rating of an instrument or an issuer, guarantor or counterparty, or the market’s perception of the creditworthiness of an instrument or issuer, guarantor or counterparty can have a rapid, adverse effect on the instrument’s value and liquidity and make it more difficult for the Fund to sell at an advantageous price or time. Interest rate risk refers to the decline in the value of a fixed-income security resulting from changes in the general level of interest rates. A wide variety of market and economic factors can cause interest rates to rise or fall, including central bank monetary policy, rising inflation, disinflation or deflation, and changes in general economic conditions. When the general level of interest rates goes up, the prices of most fixed-income securities go down. When the general level of interest rates goes down, the prices of most fixed-income securities go up but the yield or income from new issuances of fixed-income securities generally decreases. Securities with longer durations will generally be more sensitive to changes in interest rates than securities with shorter durations. Fluctuations in interest rates may also affect the liquidity of and income generated by fixed-income instruments held by the Fund. The Fund may invest in variable and floating rate loans and other variable and floating rate securities. Although the value of these instruments are generally less sensitive to interest rate changes than fixed rate instruments, the value of variable and floating rate loans and other securities may decline if their interest rates do not rise as quickly, or as much, as general interest rates. The Fund may face a heightened level of interest rate risk in times of monetary policy change and/or uncertainty, such as when the Federal Reserve Board adjusts a quantitative easing program and/or changes rates. Changing interest rates may have unpredictable effects on the markets and may detract from Fund performance. A changing interest rate environment increases certain risks, including the potential for periods of market volatility, increased redemptions, shortened durations (i.e., prepayment risk) and extended durations (i.e., extension risk).
(Eaton Vance High Income Municipal ETF) \| High Yield Securities (“Junk Bonds”) [Member]
Prospectus [Line Items]
Risk [Text Block]	• High Yield Securities (“Junk Bonds”). The Fund’s investments in high yield securities expose it to increased risks, including a substantial degree of credit and default risks. High yield securities may be issued by companies that are restructuring, are smaller and less creditworthy or are more highly leveraged or indebted than other companies or are financially distressed, and therefore they typically have more difficulty making scheduled payments of principal and interest than issuers of higher rated investments. High yield securities are subject to greater risk of loss (including substantial or total loss) of income and principal than higher rated securities and are considered speculative because of increased credit risk relative to higher rated fixed income investments. High yield securities are also subject to greater price volatility, including sudden and substantial decreases in price, and less liquidity than higher rated securities. High yield securities are particularly sensitive to adverse economic, market, industry or issuer-specific developments, which may result in an increased incidence of default. In the event of a default, the Fund may incur additional expenses to seek recovery or to negotiate new terms with a defaulting issuer.
(Eaton Vance High Income Municipal ETF) \| Derivatives [Member]
Prospectus [Line Items]
Risk [Text Block]	• Derivatives. Derivatives and other similar instruments that create synthetic exposure often are subject to risks similar to those of the underlying asset or instrument, including market risk, and may be subject to additional risks, including imperfect correlation between the value of the derivative and the underlying asset, risks of default by the counterparty to certain transactions, magnification of losses incurred due to changes in the market value of the securities, instruments, indices or interest rates to which the derivative instrument relates, risks that the transactions may not be liquid, risks arising from margin and payment requirements, risks arising from mispricing or valuation complexity and operational and legal risks. Certain derivative transactions may give rise to a form of leverage. Leverage magnifies the potential for gain and the risk of loss.
(Eaton Vance High Income Municipal ETF) \| Market and Geopolitical Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• Market and Geopolitical Risk. The value of your investment in the Fund is based on the values of the Fund’s investments, which change due to economic, geopolitical and other events that affect the U.S. and global markets generally, as well as those that affect or are perceived or expected to affect particular regions, countries, industries, companies, issuers, sectors, asset classes or governments. These types of events may be sudden and unexpected, and could adversely affect the value (or income generated by) and liquidity of the Fund’s investments, which may in turn impact the Fund’s ability to sell securities and/or its ability to meet redemptions. The risks associated with these developments may be magnified if certain social, political, economic and other conditions and events (such as war, natural disasters or events, epidemics and pandemics, terrorism, conflicts, social unrest, recessions, inflation, interest rate changes, supply chain disruptions and the imposition of tariffs, trade barriers and other protectionist or retaliatory measures) adversely interrupt or otherwise affect the global economy and financial markets. It is difficult to predict when events affecting the U.S. or global financial markets or economies may occur, the effects that such events may have and the duration of those effects (which may last for extended periods). These types of events may negatively impact broad segments of businesses and populations and have a significant and rapid negative impact on the performance or value of the Fund’s investments, adversely affect and increase the volatility of the Fund’s share price and exacerbate pre-existing risks to the Fund. The frequency and magnitude of resulting changes in the value of the Fund’s investments cannot be predicted.
(Eaton Vance High Income Municipal ETF) \| Distressed and Defaulted Securities [Member]
Prospectus [Line Items]
Risk [Text Block]	• Distressed and Defaulted Securities. Distressed and defaulted securities are speculative and involve substantial risks in addition to the risks of investing in high yield securities. The Fund will generally not receive interest payments on the distressed securities and the repayment of principal may also be subject to increased risk. These securities may present a substantial risk of default or may be in default at the time of investment, requiring the Fund to incur additional costs. The repayment of defaulted securities is also subject to significant uncertainties. The Fund may incur substantial expenses in seeking recovery upon a default in the payment of principal of or interest on its portfolio holdings.
(Eaton Vance High Income Municipal ETF) \| ETF Structure Risks [Member]
Prospectus [Line Items]
Risk [Text Block]	• ETF Structure Risks. Authorized Participant Concentration Risk. Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of intermediaries that act as authorized participants and none of these authorized participants is or will be obligated to engage in creation or redemption transactions. There can be no assurance that an active trading market for the Fund’s shares will develop or be maintained. To the extent that these intermediaries exit the business or are unable to or choose not to proceed with creation and/or redemption orders with respect to the Fund, such as during periods of market stress, and no other authorized participant creates or redeems, shares may trade at a discount to net asset value (“NAV”) per share and possibly face trading halts and/or delisting. Authorized participant concentration risk may be heightened to the extent the Fund invests in securities issued by non-U.S. issuers or other securities or instruments that have lower trading volumes. Cash Transactions Risk. Unlike certain ETFs, the Fund may effect creations and redemptions in cash or partially in cash. Therefore, it may be required to sell portfolio securities and subsequently recognize gains on such sales that the Fund might not have recognized if it were to distribute portfolio securities in-kind. As such, investments in shares may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind. Trading Risk. The market prices of shares are expected to fluctuate, in some cases materially, in response to changes in the Fund’s NAV, the intra-day value of the Fund’s holdings, and supply and demand for shares. The Adviser cannot predict whether shares will trade above, below or at their NAV. Disruptions to creations and redemptions, the existence of significant market volatility or potential lack of an active trading market for the shares (including through a trading halt), as well as other factors, may result in the shares trading significantly above (at a premium) or below (at a discount) to NAV or to the intraday value of the Fund’s holdings. You may pay significantly more or receive significantly less than the Fund’s NAV per share during periods when there is a significant premium or discount. Buying or selling shares in the secondary market may require paying brokerage commissions or other charges imposed by brokers as determined by that broker. Brokerage commissions are often a fixed amount and may be a significant proportional cost when seeking to buy or sell relatively small amounts of shares. In addition, the market price of shares, like the price of any exchange-traded security, includes a “bid-ask spread” charged by the market makers or other participants that trade the particular security. The spread of the Fund’s shares varies over time based on the Fund’s trading volume and market liquidity and may increase if the Fund’s trading volume, the spread of the Fund’s underlying securities, or market liquidity decrease.
(Eaton Vance High Income Municipal ETF) \| Active Management Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• Active Management Risk. In pursuing the Fund’s investment objective, the Adviser has considerable leeway in deciding which investments to buy, hold or sell on a day-to-day basis, and which trading strategies to use. For example, the Adviser, in its discretion, may determine to use some permitted trading strategies while not using others. The success or failure of such decisions will affect the Fund’s performance.
(Eaton Vance High Income Municipal ETF) \| Investment Company Securities [Member]
Prospectus [Line Items]
Risk [Text Block]	• Investment Company Securities. Subject to the limitations set forth in the Investment Company Act of 1940, as amended (the “1940 Act”), or as otherwise permitted by the SEC, the Fund may acquire shares in other investment companies, including foreign investment companies, closed-end funds, ETFs and money market funds which may be managed by the Adviser or its affiliates. The market value of the shares of other investment companies may differ from the NAV of the Fund. The shares of certain investment companies frequently trade at a discount to their NAV. As a shareholder in an investment company, the Fund would bear its ratable share of that entity’s expenses, including its investment advisory and administration fees, and be subject to the associated risks. At the same time, the Fund would continue to pay its own advisory and administration fees and other expenses. As a result, the Fund and its shareholders, in effect, will also be absorbing fees with respect to investments in other investment companies.
(Eaton Vance High Income Municipal ETF) \| New Fund Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• New Fund Risk. A new fund’s performance may not represent how the fund is expected to or may perform in the long term. In addition, new funds have limited operating histories for investors to evaluate and new funds may not attract sufficient assets to achieve investment and trading efficiencies.
(Eaton Vance High Income Municipal ETF) \| U.S. Government Securities [Member]
Prospectus [Line Items]
Risk [Text Block]	• U.S. Government Securities. Different types of U.S. government securities are subject to different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a U.S. government-sponsored entity, such as Federal National Mortgage Association or Federal Home Loan Mortgage Corporation, although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the U.S. Treasury and, therefore, are not backed by the full faith and credit of the United States. With respect to U.S. government securities that are not backed by the full faith and credit of the United States, there is the risk that the U.S. government will not provide financial support to such U.S. government agencies, instrumentalities or sponsored enterprises if it is not obligated to do so by law. U.S. government securities are also subject to interest rate risks and can exhibit price fluctuations resulting from increases or decreases in interest rates.
(Eaton Vance High Income Municipal ETF) \| Municipals [Member]
Prospectus [Line Items]
Risk [Text Block]	• Municipals. Because the Fund may invest in municipal securities (also referred to as municipal obligations), the Fund may be susceptible to political, legislative, economic, regulatory, tax or other factors affecting issuers of these municipal securities, such as state and local governments and their agencies. To the extent that the Fund invests in municipal securities of issuers in the same state or economic sector, it could be more sensitive to economic, business or political developments that affect such state or sector. Municipal securities and their issuers may be more susceptible to downgrade, loss of revenue, default and bankruptcy during periods of economic stress. Municipal securities also involve the risk that an issuer may call the securities for redemption, which could force the Fund to reinvest the proceeds at a lower rate of interest. While interest earned on municipal securities is generally not subject to federal income tax, any interest earned on taxable municipal securities is fully taxable at the federal level and may be subject to state and/or local income tax.
(Eaton Vance High Income Municipal ETF) \| Taxability Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• Taxability Risk. Changes in tax laws or adverse determinations by the Internal Revenue Service (“IRS”) may make the income from some municipal obligations taxable.
(Eaton Vance High Income Municipal ETF) \| Residual Interest Bonds [Member]
Prospectus [Line Items]
Risk [Text Block]	• Residual Interest Bonds. The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond. The interest payments that the Fund receives on the residual interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase. The value and market for residual interest bonds are volatile and such bonds may have limited liquidity. As required by applicable accounting standards, the Fund records interest expense as a liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.

Investment Risks

Sep. 30, 2024

There is no assurance that the Fund will achieve its investment objective, and you can lose money investing in this Fund.

(Eaton Vance CLO Investment Grade Income ETF) | Risk Not Insured Depository Institution [Member]

Prospectus [Line Items]

Risk [Text Block]

Shares of the Fund are not bank deposits and are not guaranteed or insured by the Federal Deposit Insurance Corporation or any other government agency.

(Eaton Vance CLO Investment Grade Income ETF) | Risk Nondiversified Status [Member]

Prospectus [Line Items]

Risk [Text Block]

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Non-Diversification. The Fund is non-diversified, which means that the Fund may invest a greater percentage of its assets in a smaller number of issuers than a diversified fund. Because the Fund is non-diversified, it may be more susceptible to an adverse event affecting a single issuer or portfolio investment than a diversified portfolio and a decline in the value of that issuer’s securities or that portfolio investment may cause the Fund’s overall value to decline to a greater degree than a diversified portfolio.

(Eaton Vance CLO Investment Grade Income ETF) | Collateralized Loan Obligations Risk [Member]

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Collateralized Loan Obligations Risk. CLOs are a type of asset-backed security that is typically structured as a trust collateralized by a pool of loans. The cash flows from the trust are split into two or more portions, called tranches, varying in risk and yield. The risks of an investment in a CLO depend largely on the type of the collateral securities and the class or tranche of the instrument in which the Fund invests. In addition to the risks normally associated with fixed income securities, such as interest rate risk, default risk, credit risk and liquidity risk, CLOs carry additional risks including, but not limited to: (i) the possibility that distributions from collateral securities will not be adequate to make interest or other payments; (ii) the quality of the collateral may decline in value or default; (iii) the Fund may invest in CLOs that are subordinate to other classes; and (iv) the complex structure of the security may not be fully understood at the time of investment and may produce disputes with the issuer or unexpected investment results. The Fund and other investors in CLOs ultimately bear the credit and interest rate risks of the underlying collateral. CLOs, and their underlying loan obligations, are typically not registered for sale to the public and therefore are subject to certain restrictions on transfer and sale, potentially subjecting them to increased liquidity risk as compared to other types of securities. As a result, the proceeds from the sale of CLO securities may not be readily available to meet the Fund’s redemption or other obligations and the Fund may be unable to acquire or dispose of the securities at a price and time the Fund deems advantageous.

CLOs in which the Fund invests may be managed by investment advisers not affiliated with the Adviser. CLO managers are responsible for selecting, managing and replacing the underlying bank loans within a CLO. CLO managers may have limited operating histories and, may be subject to conflicts of interests, including managing the assets of other clients or other investment vehicles, or receiving fees that incentivize maximizing the yield, and indirectly the risk, of a CLO. Adverse developments with respect to a CLO manager may adversely impact the performance of the CLO securities in which the Fund invests.

(Eaton Vance CLO Investment Grade Income ETF) | Loan Risks [Member]

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Loan Risks. Investments in loans are subject to the risks generally associated with other debt obligations (such as credit and interest rate risk). Loans are also subject to additional risks, including subordination to other creditors, no collateral or limited rights in collateral, increased liquidity risks and lack of publicly available information. Loans are subject to the risk of default in the payment of interest or principal, which will result in a reduction of income or other losses to the Fund, and a potential decrease in the Fund’s NAV. Loans are traded in a private, unregulated inter-dealer or interbank resale market and are generally subject to contractual restrictions that must be satisfied before a loan can be bought or sold. These restrictions may impede the Fund’s ability to buy or sell loans (thus affecting their liquidity) and may negatively impact the transaction price. It also may take longer than seven days for transactions in loans to settle. Due to the possibility of an extended loan settlement process, the Fund may hold additional cash, sell investments or temporarily borrow from banks or other lenders to meet short-term liquidity needs. The types of covenants included in loan agreements generally vary depending on market conditions, the creditworthiness of the issuer, the

nature of the collateral securing the loan and possibly other factors. Loans with fewer covenants that restrict activities of the borrower may provide the borrower with more flexibility to take actions that may be detrimental to the loan holders and provide fewer investor protections in the event of such actions or if covenants are breached. The Fund may experience relatively greater realized or unrealized losses or delays and expense in enforcing its rights with respect to loans with fewer restrictive covenants. Loans to entities located outside of the U.S. may have substantially different lender protections and covenants as compared to loans to U.S. entities and generally involve greater and additional risks. The Fund may have difficulties and incur expense enforcing its rights with respect to loans and non-U.S. loans could be subject to bankruptcy laws that are materially different than in the U.S. Loans may be structured such that they are not securities under securities laws, and in the event of fraud or misrepresentation by a borrower, lenders may not have the protection of the anti-fraud provisions of the federal securities laws. Loans are also subject to risks associated with other types of income investments, including credit risk and risks of lower rated investments. In addition, bank loans are subject to the risk of default in the payment of interest or principal on a loan, which will result in a reduction of income to the Fund, and a potential decrease in the Fund’s NAV. The risk of default on loans will increase in the event of an economic downturn or a substantial increase in interest rates. Because some loans rank lower in priority of payment to other loans and other obligations, such loans present a greater degree of investment risk and may exhibit greater price volatility.

(Eaton Vance CLO Investment Grade Income ETF) | Covenant Lite Loans [Member]

Prospectus [Line Items]

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Covenant Lite Loans. Some of the loans or other obligations in which the Fund may invest or obtain exposure to may be “covenant lite” loans or other obligations. Certain financial institutions may define “covenant lite” loans or securities differently. Covenants contained in loan documentation are intended to protect lenders and investors by imposing certain restrictions and other limitations on a borrower’s operations or assets and by providing certain information and consent rights to lenders. Covenant lite loans or securities, which have varied terms and conditions, may contain fewer or no restrictive covenants compared to other loans that might enable the Fund to, among other things, proactively enforce financial covenants or prevent undesired actions by the borrower. As a result, covenant lite loans generally carry greater risks because they allow borrowers to exercise more flexibility with respect to certain activities that may otherwise be limited or prohibited under similar loan obligations that are not covenant lite. In addition, the Fund may receive less or less frequent financial reporting from a borrower under a covenant-lite obligation, which may result in more limited access to financial information, difficulty evaluating the borrower’s financial performance over time and delays in exercising rights and remedies in the event of a significant financial decline. The Fund may experience relatively greater difficulty or delays in enforcing its rights on its holdings of certain covenant lite loans and other similar obligations than its holdings of loans or securities with more traditional financial covenants, which may result in losses to the Fund. Many loans and similar debt obligations may not feature traditional financial maintenance covenants, which are intended to protect lenders and investors by imposing certain restrictions and other limitations on a borrower’s operations or assets and by providing certain information and consent rights to lenders.

(Eaton Vance CLO Investment Grade Income ETF) | Liquidity [Member]

Prospectus [Line Items]

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Liquidity. The Fund may make investments that are less liquid, illiquid or restricted or that may become illiquid or less liquid in response to overall economic conditions or adverse investor perceptions, and which may entail greater risk than investments in other types of securities. These investments may be more difficult to value or sell, particularly in times of market turmoil, and there may be little trading in the secondary market available for particular securities. Liquidity risk may be magnified in a market where credit spread and interest rate volatility is rising and where investor redemptions from fixed-income funds may be higher than normal. If the Fund is forced to sell an illiquid or restricted security to fund redemptions or for other cash needs, it may be forced to sell the security at a loss or for less than its fair value and may be unable to sell the security at all.

Certain CLO securities may have limited liquidity in various market conditions, and in such instances will be less liquid than more senior or higher-rated CLOs. The price of CLO securities may rapidly decline if a large number of holders of the CLO securities decide to sell. The CLO market is smaller relative to other fixed-income instrument markets. Historic liquidity measures of CLOs may or may not be predictive of the liquidity of CLOs in the future. During adverse market conditions, there may be instances in which the market for trading CLOs becomes thin, or in extreme circumstances, particularly with respect to subordinate or lower-rated CLO tranches, may cease to exist during such period.

(Eaton Vance CLO Investment Grade Income ETF) | Asset-Backed Securities [Member]

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Asset-Backed Securities. Asset-backed securities are subject to credit (such as a borrower’s default on its mortgage obligation and the default or failure of a guarantee underlying the asset-backed security), interest rate and certain additional risks, including the risk that various federal and state consumer laws and other legal and economic factors may result in the collateral backing the securities being insufficient to support payment on the securities. To the extent the Fund invests in asset-backed securities issued by non-governmental issuers, such as commercial banks, savings and loan institutions, and other secondary market issuers, the Fund will be exposed to additional risks because, among other things, there are no direct or indirect government or agency guarantees of payments in the pools underlying the securities. Some asset-backed securities also entail prepayment risk and extension risk, which may vary depending on the type of asset. Due to these and other risks, asset-backed securities may become more volatile in certain interest rate environments.

(Eaton Vance CLO Investment Grade Income ETF) | Fixed Income Securities [Member]

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interest rate, credit and other risks, corporate debt obligations are also subject to factors directly related to the issuer, such as the credit rating of the corporation, the corporation’s performance and perceptions of the corporation in the marketplace, and by factors not directly related to the issuer, such as general market liquidity, economic conditions and inflation. The Fund may face a heightened level of interest rate risk in times of monetary policy change and/or uncertainty, such as when the Federal Reserve Board adjusts a quantitative easing program and/or changes rates. A changing interest rate environment increases certain risks, including the potential for periods of volatility, increased redemptions, shortened durations (i.e., prepayment risk) and extended durations (i.e., extension risk). The Fund is not limited as to the maturities (when a debt security provides its final payment) or durations (measure of interest rate sensitivity) of the securities in which it may invest. Securities with longer durations are likely to be more sensitive to changes in interest rates, generally making them more volatile than securities with shorter durations. Lower rated fixed-income securities have greater volatility because there is less certainty that principal and interest payments will be made as scheduled. The Fund may be subject to certain liquidity risks that may result from the lack of an active market and the reduced number and capacity of traditional market participants to make a market in fixed-income securities.

(Eaton Vance CLO Investment Grade Income ETF) | Credit and Interest Rate Risk [Member]

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Credit and Interest Rate Risk. Credit risk refers to the possibility that the issuer or guarantor of a security, or counterparty to a transaction, will be unable or unwilling or perceived to be unable or unwilling to make interest payments and/or repay the principal on its debt or otherwise honor its obligations, including the risk of default. In such instances, the value of the Fund could decline and the Fund could lose money. If an issuer’s, guarantor’s or counterparty’s financial condition worsens, the credit quality of the issuer, guarantor or counterparty may deteriorate. Credit ratings may not be an accurate assessment of financial condition, liquidity or credit risk. Although credit ratings may not accurately reflect the true credit risk of an instrument, a change in the credit rating of an instrument or an issuer, guarantor or counterparty, or the market’s perception of the creditworthiness of an instrument or issuer, guarantor or counterparty can have a rapid, adverse effect on the instrument’s value and liquidity and make it more difficult for the Fund to sell at an advantageous price or time. Interest rate risk refers to the decline in the value of a fixed-income security resulting from changes in the general level of interest rates. A wide variety of market and economic factors can cause interest rates to rise or fall, including central bank monetary policy, rising inflation, disinflation or deflation, and changes in general economic conditions. When the general level of interest rates goes up, the prices of most fixed-income securities go down. When the general level of interest rates goes down, the prices of most fixed-income securities go up but the yield or income from new issuances of fixed-income securities generally decreases. Securities with longer durations will generally be more sensitive to changes in interest rates than securities with shorter durations. Fluctuations in interest rates may also affect the liquidity of and income generated by fixed-income instruments held by the Fund. The Fund may invest in variable and floating rate loans and other variable and floating rate securities. Although the value of these instruments are generally less sensitive to interest rate changes than fixed rate instruments, the value of variable and floating rate loans and other securities may decline if their interest rates do not rise as quickly, or as much, as general interest rates. The Fund may face a heightened level of interest rate risk in times of monetary policy change and/or uncertainty, such as when the Federal Reserve Board adjusts a quantitative easing program and/or changes rates. Changing interest rates may have unpredictable effects on the markets and may detract from Fund performance. A changing interest rate environment increases certain risks, including the potential for periods of market volatility, increased redemptions, shortened durations (i.e., prepayment risk) and extended durations (i.e., extension risk).

(Eaton Vance CLO Investment Grade Income ETF) | High Yield Securities (“Junk Bonds”) [Member]

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High Yield Securities (“Junk Bonds”). The Fund’s investments in high yield securities expose it to increased risks, including a substantial degree of credit and default risks. High yield securities may be issued by companies that are restructuring, are smaller and less creditworthy or are more highly leveraged or indebted than other companies or are financially distressed, and therefore they typically have more difficulty making scheduled payments of principal and interest than issuers of higher rated investments. High yield securities are subject to greater risk of loss (including substantial or total loss) of income and principal than higher rated securities and are considered speculative because of increased credit risk relative to higher rated fixed income investments. High yield securities are also subject to greater price volatility, including sudden and substantial decreases in price, and less liquidity than higher rated securities. High yield securities are particularly sensitive to adverse economic, market, industry or issuer-specific developments, which may result in an increased incidence of default. In the event of a default, the Fund may incur additional expenses to seek recovery or to negotiate new terms with a defaulting issuer.

(Eaton Vance CLO Investment Grade Income ETF) | Foreign Securities [Member]

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Foreign Securities. The Fund may invest in U.S. dollar-denominated securities issued by foreign governmental or corporate issuers. Investing in securities of foreign issuers involves some additional risks than securities of U.S. issuers. While foreign securities, including foreign money market securities, are subject to the same type of risks that pertain to domestic issuers, namely credit risk and interest rate risk, they are also subject to other additional risks. Foreign issuers generally are subject to different accounting, auditing and financial reporting standards than U.S. issuers. There may be less information available to the public about foreign issuers. In some foreign countries, there is also the risk of government expropriation, excessive taxation, political or social instability, economic sanctions or other similar governmental activity or diplomatic developments (including regional and global, military or other conflicts) that could affect an investment. There also can be difficulty obtaining and enforcing judgments against issuers in foreign countries. Governmental interventions or other actions can have a significant effect on the economic conditions in foreign countries, which also may adversely affect the Fund’s investments in foreign issuers.

(Eaton Vance CLO Investment Grade Income ETF) | Foreign Currency [Member]

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Foreign Currency. The Fund’s investments in foreign securities may be denominated in foreign currencies. The value of foreign currencies may fluctuate relative to the value of the U.S. dollar. Since the Fund may invest in such non-U.S. dollar-denominated securities, and therefore may convert the value of such securities into U.S. dollars, changes in currency exchange rates can increase

or decrease the U.S. dollar value of the Fund’s assets. Currency exchange rates may fluctuate significantly over short periods of time for a number of reasons, including changes in interest rates and the overall economic health of the issuer. Devaluation of a currency by a country’s government or banking authority also will have a significant impact on the value of any investments denominated in that currency. The Adviser may use derivatives to reduce this risk. The Adviser may in their discretion choose not to hedge against currency risk. In addition, certain market conditions may make it impossible or uneconomical to hedge against currency risk.

(Eaton Vance CLO Investment Grade Income ETF) | Derivatives [Member]

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Derivatives. Derivatives and other similar instruments that create synthetic exposure often are subject to risks similar to those of the underlying asset or instrument, including market risk, and may be subject to additional risks, including imperfect correlation between the value of the derivative and the underlying asset, risks of default by the counterparty to certain transactions, magnification of losses incurred due to changes in the market value of the securities, instruments, indices or interest rates to which the derivative instrument relates, risks that the transactions may not be liquid, risks arising from margin and payment requirements, risks arising from mispricing or valuation complexity and operational and legal risks. Certain derivative transactions may give rise to a form of leverage. Leverage magnifies the potential for gain and the risk of loss.

(Eaton Vance CLO Investment Grade Income ETF) | Market and Geopolitical Risk [Member]

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Market and Geopolitical Risk. The value of your investment in the Fund is based on the values of the Fund’s investments, which change due to economic, geopolitical and other events that affect the U.S. and global markets generally, as well as those that affect or are perceived or expected to affect particular regions, countries, industries, companies, issuers, sectors, asset classes or governments. These types of events may be sudden and unexpected, and could adversely affect the value (or income generated by) and liquidity of the Fund’s investments, which may in turn impact the Fund’s ability to sell securities and/or its ability to meet redemptions. The risks associated with these developments may be magnified if certain social, political, economic and other conditions and events (such as war, natural disasters or events, epidemics and pandemics, terrorism, conflicts, social unrest, recessions, inflation, interest rate changes, supply chain disruptions and the threat or actual imposition of tariffs, trade barriers and other protectionist or retaliatory measures) adversely interrupt or otherwise affect the global economy and financial markets. It is difficult to predict when events affecting the U.S. or global financial markets or economies may occur, the effects that such events may have and the duration of those effects (which may last for extended periods). These types of events may negatively impact broad segments of businesses and populations and have a significant and rapid negative impact on the performance or value of the Fund’s investments, adversely affect and increase the volatility of the Fund’s share price and exacerbate pre-existing risks to the Fund. The frequency and magnitude of resulting changes in the value of the Fund’s investments cannot be predicted.

(Eaton Vance CLO Investment Grade Income ETF) | Distressed and Defaulted Securities [Member]

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Distressed and Defaulted Securities. Distressed and defaulted securities are speculative and involve substantial risks in addition to the risks of investing in high yield securities. The Fund will generally not receive interest payments on the distressed securities and the repayment of principal may also be subject to increased risk. These securities may present a substantial risk of default or may be in default at the time of investment, requiring the Fund to incur additional costs. The repayment of defaulted securities is also subject to significant uncertainties. The Fund may incur substantial expenses in seeking recovery upon a default in the payment of principal of or interest on its portfolio holdings.

(Eaton Vance CLO Investment Grade Income ETF) | LIBOR Discontinuance or Unavailability Risk [Member]

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LIBOR Discontinuance or Unavailability Risk. The Fund’s investments, payment obligations and financing terms may be based on floating rates, such as the London Interbank Offered Rates (collectively, “LIBOR”), Euro Interbank Offered Rate, Secured Overnight Financing Rate (“SOFR”) and other similar types of reference rates (each, a “Reference Rate”). These Reference Rates are generally intended to represent the rate at which contributing banks may obtain short-term borrowings from each other within certain financial markets. London Interbank Offered Rate (“LIBOR”) was the basic rate of interest used in lending transactions between banks on the London interbank market and has been widely used as a reference for setting the interest rate on loans globally. As a result of benchmark reforms, publication of LIBOR settings has ceased. Certain regulators and industry groups have taken actions to establish alternative reference rates (e.g., the SOFR, which measures the cost of overnight borrowings through repurchase agreement transactions collateralized with U.S. Treasury securities and is intended to replace U.S. dollar LIBORs with certain adjustments). These developments could negatively impact financial markets in general and present heightened risks, including with respect to the Fund’s investments. As a result of the uncertainty and developments relating to the transition process, performance, price volatility, liquidity and value of the Fund and its assets may be adversely affected.

(Eaton Vance CLO Investment Grade Income ETF) | ETF Structure Risks [Member]

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ETF Structure Risks.

Authorized Participant Concentration Risk. Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of intermediaries that act as authorized participants and none of these authorized participants is or will be obligated to engage in creation or redemption transactions. There can be no assurance that an active trading market for the Fund’s shares will develop or be maintained. To the extent that these intermediaries exit the business or are unable to or choose not to proceed with creation and/or redemption orders with respect to the Fund, such as during periods of market stress, and no other authorized participant creates or redeems, shares may trade at a discount to net asset value (“NAV”) per share and possibly face trading halts and/or delisting. Authorized participant concentration risk may be heightened to the extent the Fund invests in securities issued by non-U.S. issuers or other securities or instruments that have lower trading volumes.

have recognized if it were to distribute portfolio securities in-kind. As such, investments in shares may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind.

Trading Risk. The market prices of shares are expected to fluctuate, in some cases materially, in response to changes in the Fund’s NAV, the intra-day value of the Fund’s holdings, and supply and demand for shares. The Adviser cannot predict whether shares will trade above, below or at their NAV. Disruptions to creations and redemptions, the existence of significant market volatility or potential lack of an active trading market for the shares (including through a trading halt), as well as other factors, may result in the shares trading significantly above (at a premium) or below (at a discount) to NAV or to the intraday value of the Fund’s holdings. You may pay significantly more or receive significantly less than the Fund’s NAV per share during periods when there is a significant premium or discount. Buying or selling shares in the secondary market may require paying brokerage commissions or other charges imposed by brokers as determined by that broker. Brokerage commissions are often a fixed amount and may be a significant proportional cost when seeking to buy or sell relatively small amounts of shares. In addition, the market price of shares, like the price of any exchange-traded security, includes a “bid-ask spread” charged by the market makers or other participants that trade the particular security. The spread of the Fund’s shares varies over time based on the Fund’s trading volume and market liquidity and may increase if the Fund’s trading volume, the spread of the Fund’s underlying securities, or market liquidity decrease.

(Eaton Vance CLO Investment Grade Income ETF) | Active Management Risk [Member]

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Active Management Risk. In pursuing the Fund’s investment objective, the Adviser has considerable leeway in deciding which investments to buy, hold or sell on a day-to-day basis, and which trading strategies to use. For example, the Adviser, in its discretion, may determine to use some permitted trading strategies while not using others. The success or failure of such decisions will affect the Fund’s performance.

(Eaton Vance CLO Investment Grade Income ETF) | Investment Company Securities [Member]

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Investment Company Securities. Subject to the limitations set forth in the Investment Company Act of 1940, as amended (the “1940 Act”), or as otherwise permitted by the SEC, the Fund may acquire shares in other investment companies, including foreign investment companies, closed-end funds, ETFs and money market funds which may be managed by the Adviser or its affiliates. The market value of the shares of other investment companies may differ from the NAV of the Fund. The shares of certain investment companies frequently trade at a discount to their NAV. As a shareholder in an investment company, the Fund would bear its ratable share of that entity’s expenses, including its investment advisory and administration fees, and be subject to the associated risks. At the same time, the Fund would continue to pay its own advisory and administration fees and other expenses. As a result, the Fund and its shareholders, in effect, will also be absorbing fees with respect to investments in other investment companies.

(Eaton Vance CLO Investment Grade Income ETF) | New Fund Risk [Member]

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New Fund Risk. A new fund’s performance may not represent how the fund is expected to or may perform in the long term. In addition, new funds have limited operating histories for investors to evaluate and new funds may not attract sufficient assets to achieve investment and trading efficiencies.

(Eaton Vance High Income Municipal ETF) | Risk Lose Money [Member]

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There is no assurance that the Fund will achieve its investment objective, and you can lose money investing in this Fund.

(Eaton Vance High Income Municipal ETF) | Risk Not Insured Depository Institution [Member]

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Shares of the Fund are not bank deposits and are not guaranteed or insured by the Federal Deposit Insurance Corporation or any other government agency.

(Eaton Vance High Income Municipal ETF) | Liquidity [Member]

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(Eaton Vance High Income Municipal ETF) | Fixed Income Securities [Member]

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Fixed-Income Securities. Fixed-income securities are subject to the risk of the issuer’s inability to meet principal and interest payments on its obligations (i.e., credit risk) and are subject to price volatility resulting from, among other things, interest rate sensitivity (i.e., interest rate risk), market perception of the creditworthiness of the issuer and general market liquidity (i.e., market risk). For example, a type of fixed-income securities in which the Fund may invest are corporate debt obligations. In addition to interest rate, credit and other risks, corporate debt obligations are also subject to factors directly related to the issuer, such as the credit rating of the corporation, the corporation’s performance and perceptions of the corporation in the marketplace, and by factors not directly related to the issuer, such as general market liquidity, economic conditions and inflation. The Fund may face a heightened level of interest rate risk in times of monetary policy change and/or uncertainty, such as when the Federal Reserve Board adjusts a quantitative easing program and/or changes rates. A changing interest rate environment increases certain risks, including the potential for periods of volatility, increased redemptions, shortened durations (i.e., prepayment risk) and extended durations (i.e., extension risk). The Fund is not limited as to the maturities (when a debt security provides its final payment) or durations (measure of interest rate sensitivity) of the securities in which it may invest. Securities with longer durations are likely to be more sensitive to changes in interest rates, generally making them more volatile than securities with shorter durations. Lower rated fixed-income securities have greater volatility because there is less certainty that principal and interest payments will be made as scheduled. The Fund may be subject to certain liquidity risks that may result from the lack of an active market and the reduced number and capacity of traditional market participants to make a market in fixed-income securities.

(Eaton Vance High Income Municipal ETF) | Credit and Interest Rate Risk [Member]

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can cause interest rates to rise or fall, including central bank monetary policy, rising inflation, disinflation or deflation, and changes in general economic conditions. When the general level of interest rates goes up, the prices of most fixed-income securities go down. When the general level of interest rates goes down, the prices of most fixed-income securities go up but the yield or income from new issuances of fixed-income securities generally decreases. Securities with longer durations will generally be more sensitive to changes in interest rates than securities with shorter durations. Fluctuations in interest rates may also affect the liquidity of and income generated by fixed-income instruments held by the Fund. The Fund may invest in variable and floating rate loans and other variable and floating rate securities. Although the value of these instruments are generally less sensitive to interest rate changes than fixed rate instruments, the value of variable and floating rate loans and other securities may decline if their interest rates do not rise as quickly, or as much, as general interest rates. The Fund may face a heightened level of interest rate risk in times of monetary policy change and/or uncertainty, such as when the Federal Reserve Board adjusts a quantitative easing program and/or changes rates. Changing interest rates may have unpredictable effects on the markets and may detract from Fund performance. A changing interest rate environment increases certain risks, including the potential for periods of market volatility, increased redemptions, shortened durations (i.e., prepayment risk) and extended durations (i.e., extension risk).

(Eaton Vance High Income Municipal ETF) | High Yield Securities (“Junk Bonds”) [Member]

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(Eaton Vance High Income Municipal ETF) | Derivatives [Member]

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requirements, risks arising from mispricing or valuation complexity and operational and legal risks. Certain derivative transactions may give rise to a form of leverage. Leverage magnifies the potential for gain and the risk of loss.

(Eaton Vance High Income Municipal ETF) | Market and Geopolitical Risk [Member]

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Market and Geopolitical Risk. The value of your investment in the Fund is based on the values of the Fund’s investments, which change due to economic, geopolitical and other events that affect the U.S. and global markets generally, as well as those that affect or are perceived or expected to affect particular regions, countries, industries, companies, issuers, sectors, asset classes or governments. These types of events may be sudden and unexpected, and could adversely affect the value (or income generated by) and liquidity of the Fund’s investments, which may in turn impact the Fund’s ability to sell securities and/or its ability to meet redemptions. The risks associated with these developments may be magnified if certain social, political, economic and other conditions and events (such as war, natural disasters or events, epidemics and pandemics, terrorism, conflicts, social unrest, recessions, inflation, interest rate changes, supply chain disruptions and the imposition of tariffs, trade barriers and other protectionist or retaliatory measures) adversely interrupt or otherwise affect the global economy and financial markets. It is difficult to predict when events affecting the U.S. or global financial markets or economies may occur, the effects that such events may have and the duration of those effects (which may last for extended periods). These types of events may negatively impact broad segments of businesses and populations and have a significant and rapid negative impact on the performance or value of the Fund’s investments, adversely affect and increase the volatility of the Fund’s share price and exacerbate pre-existing risks to the Fund. The frequency and magnitude of resulting changes in the value of the Fund’s investments cannot be predicted.

(Eaton Vance High Income Municipal ETF) | Distressed and Defaulted Securities [Member]

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(Eaton Vance High Income Municipal ETF) | ETF Structure Risks [Member]

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ETF Structure Risks.

Cash Transactions Risk. Unlike certain ETFs, the Fund may effect creations and redemptions in cash or partially in cash. Therefore, it may be required to sell portfolio securities and subsequently recognize gains on such sales that the Fund might not have recognized if it were to distribute portfolio securities in-kind. As such, investments in shares may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind.

(Eaton Vance High Income Municipal ETF) | Active Management Risk [Member]

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(Eaton Vance High Income Municipal ETF) | Investment Company Securities [Member]

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(Eaton Vance High Income Municipal ETF) | New Fund Risk [Member]

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(Eaton Vance High Income Municipal ETF) | U.S. Government Securities [Member]

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U.S. Government Securities. Different types of U.S. government securities are subject to different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a U.S. government-sponsored entity, such as Federal National Mortgage Association or Federal Home Loan Mortgage Corporation, although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the U.S. Treasury and, therefore, are not backed by the full faith and credit of the United States. With respect to U.S. government securities that are not backed by the full faith and credit of the United States, there is the risk that the U.S. government will not provide financial support to such U.S. government agencies, instrumentalities or sponsored enterprises if it is not obligated to do so by law. U.S. government securities are also subject to interest rate risks and can exhibit price fluctuations resulting from increases or decreases in interest rates.

(Eaton Vance High Income Municipal ETF) | Municipals [Member]

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Municipals. Because the Fund may invest in municipal securities (also referred to as municipal obligations), the Fund may be susceptible to political, legislative, economic, regulatory, tax or other factors affecting issuers of these municipal securities, such as state and local governments and their agencies. To the extent that the Fund invests in municipal securities of issuers in the same state or economic sector, it could be more sensitive to economic, business or political developments that affect such state or sector. Municipal securities and their issuers may be more susceptible to downgrade, loss of revenue, default and bankruptcy during periods of economic stress. Municipal securities also involve the risk that an issuer may call the securities for redemption, which could force the Fund to reinvest the proceeds at a lower rate of interest. While interest earned on municipal securities is generally not subject to federal income tax, any interest earned on taxable municipal securities is fully taxable at the federal level and may be subject to state and/or local income tax.

(Eaton Vance High Income Municipal ETF) | Taxability Risk [Member]

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Taxability Risk. Changes in tax laws or adverse determinations by the Internal Revenue Service (“IRS”) may make the income from some municipal obligations taxable.

(Eaton Vance High Income Municipal ETF) | Residual Interest Bonds [Member]

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Residual Interest Bonds. The Fund may enter into residual interest bond transactions, which expose the Fund to leverage and greater risk than an investment in a fixed-rate municipal bond. The interest payments that the Fund receives on the residual

interest bonds acquired in such transactions vary inversely with short-term interest rates, normally decreasing when short-term rates increase. The value and market for residual interest bonds are volatile and such bonds may have limited liquidity. As required by applicable accounting standards, the Fund records interest expense as a liability with respect to floating-rate notes and also records offsetting interest income in an amount equal to this expense.