GMO Climate Change Fund Investment Risks - GMO Climate Change Fund	Feb. 28, 2025
Focused Investment Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	●Focused Investment Risk − Because the Fund focuses its investments in securities of companies involved in climate change-related industries, the Fund will be more susceptible to events or factors affecting these companies, and the market prices of its portfolio securities may be more volatile than those of mutual funds that are more diversified. The Fund is particularly exposed to such developments as changes in global and regional climates, environmental protection regulatory actions, changes in government standards and subsidy levels, changes in taxation and other domestic and international political, regulatory and economic developments (such as potential cutbacks on funding for the Environmental Protection Agency). Companies involved in alternative fuels also may be adversely affected by the increased use of, or decreases in prices for, oil or other fossil fuels. Such companies are often capital-intensive and use significant amounts of leverage, subjecting them to the risk of rising interest rates that could adversely affect their ability to repay debt issued to finance capital projects and/or to borrow or otherwise raise additional money to finance those projects. In addition, scientific developments, such as breakthroughs in the remediation of global warming, and changes in governmental policies relating to the effects of pollution may affect investments in pollution control, which could in turn affect these companies. Such companies also may be significantly affected by technological changes in industries focusing on energy, pollution control and mitigation of global warming. Because society’s focus on climate change issues is relatively new, the emphasis and direction of governmental policies is subject to significant change, and rapid technological change could render even new approaches and products obsolete. Some companies involved in climate change-related industries have more limited operating histories and smaller market capitalizations on average than companies in other sectors. As a result of these and other factors, the market prices of securities of companies involved in climate change-related industries tend to be considerably more volatile than those of companies in more established sectors and industries.
Market Risk Equities [Member]
Prospectus [Line Items]
Risk [Text Block]	●Market Risk – Equities – The market price of an equity in the Fund’s portfolio may decline due to factors affecting the issuer or its industry or the economy and equity markets generally. If the Fund purchases an equity for less than its fundamental fair (or intrinsic) value as assessed by GMO, the Fund runs the risk that the market price of the equity will not appreciate or will decline (for example, if GMO’s assessment proves to be incorrect or the market fails to recognize the equity’s intrinsic value). The Fund also may purchase equities that typically trade at higher multiples of current earnings than other securities, and the market prices of these equities often are more sensitive to changes in future earnings expectations and interest rates than the market prices of equities trading at lower multiples. Declines in stock market prices generally are likely to reduce the net asset value of the Fund’s shares.
Management and Operational Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	●Management and Operational Risk – The Fund runs the risk that GMO’s investment techniques will fail to produce intended results.The Fund also runs the risk that GMO’s assessment of an investment, including a security’s fundamental fair (or intrinsic) value, is wrong or that deficiencies in GMO’s or another service provider’s internal systems or controls will cause losses for the Fund or impair Fund operations.
Smaller Company Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	●Smaller Company Risk – Smaller companies may have limited product lines, markets, or financial resources, lack the competitive strength of larger companies, have less experienced managers or depend on a few key employees. The securities of companies with smaller market capitalizations often are less widely held and trade less frequently and in lesser quantities, and their market prices often fluctuate more, than the securities of companies with larger market capitalizations.
Non-U.S. Investment Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	●Non-U.S. Investment Risk – The market prices of many non-U.S. securities fluctuate more than those of U.S. securities. Many non-U.S. securities markets are less stable, smaller, less liquid, and less regulated than U.S. securities markets, and the cost of trading in those markets often is higher than in U.S. securities markets. In addition, non-U.S. securities issuers often are not subject to as much regulation as U.S. issuers, and the reporting, recordkeeping, accounting, custody, and auditing standards to which those issuers are subject often are not as rigorous as U.S. standards. In addition, the Fund is subject to taxation by countries other than the United States, including potentially on a retroactive basis, on (i) capital gains it realizes or dividends, interest, or other amounts it realizes or accrues in respect of non-U.S. investments; (ii) transactions in those investments; and (iii) repatriation of proceeds generated from the sale or other disposition of those investments. Also, the Fund needs a license to invest directly in securities traded in many non-U.S. securities markets, and the Fund is subject to the risk that its license is terminated or suspended. In some non-U.S. securities markets, prevailing custody and trade settlement practices (e.g., the requirement to pay for securities prior to receipt) expose the Fund to credit and other risks. Further, adverse changes in investment regulations, capital requirements or exchange controls could adversely affect the value of the Fund’s investments. The risks above (such as substantial price fluctuations and market instability, illiquidity and lack of regulation) and other risks (e.g., nationalization, expropriation or other confiscation of assets of non-U.S. issuers, difficulties enforcing legal judgments or contractual rights and geopolitical risks) tend to be higher for investments in the securities of issuers tied economically to emerging countries. The economies of emerging countries often depend predominantly on only a few industries or commodities and often are more volatile than the economies of developed countries.
Illiquidity Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	●Illiquidity Risk – Low trading volume, lack of a market maker, large position size, or legal restrictions increase the risk that the Fund or an underlying fund is limited or prevented from selling particular securities or closing derivative positions at desirable prices at a particular time or at all.
Market Disruption and Geopolitical Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	●Market Disruption and Geopolitical Risk – Geopolitical and other events (e.g., wars, pandemics, sanctions, terrorism, diplomatic tensions, dramatic changes in regulatory and/or foreign policy, cyberattacks, and rapid technological developments such as artificial intelligence) often disrupt securities markets and adversely affect the general economy or particular economies and markets. Those events, as well as other changes in non-U.S. and U.S. economic and political conditions, could exacerbate other risks or otherwise reduce the value of the Fund’s investments.
Commodities Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	●Commodities Risk – Commodity prices can be extremely volatile, and exposure to commodities can cause the net asset value of the Fund’s shares to decline or fluctuate significantly in a rapid and unpredictable manner.
Currency Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	●Currency Risk – Fluctuations in exchange rates can adversely affect the market value of the Fund’s foreign currency holdings and investments denominated in foreign currencies.
Derivatives and Short Sales Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	●Derivatives and Short Sales Risk – The use of derivatives involves the risk that their value may not change as expected relative to changes in the value of the underlying assets, pools of assets, rates, currencies or indices. Derivatives also present other risks, including market risk, illiquidity risk, currency risk, credit risk, leveraging risk, commodities risk and counterparty risk. The market price of an option is affected by many factors, including changes in the market prices or dividend rates of underlying securities (or in the case of indices, the securities in such indices); the time remaining before expiration; changes in interest rates or exchange rates; and changes in the actual or perceived volatility of the relevant index or underlying securities. The Fund typically creates short investment exposure by selling securities short or by taking a derivative position in which the value of the derivative moves in the opposite direction from the price of an underlying asset, pool of assets, rate, currency or index. Specifically, the net asset value of the Fund’s shares will be adversely affected if the securities or other assets that are the subject of the Fund’s short exposures appreciate in value. The risk of loss associated with derivatives that provide short investment exposure and short sales of securities is theoretically unlimited.
Counterparty Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	●Counterparty Risk – The Fund runs the risk that the counterparty to a derivatives contract or a clearing member used by the Fund to hold a cleared derivatives contract is unable or unwilling to make timely settlement payments, return the Fund’s collateral or otherwise honor its obligations.
Leveraging Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	●Leveraging Risk – The use of derivatives, short sales and securities lending can create leverage. Leverage increases the Fund’s losses when the value of its investments (including derivatives) declines. In addition, the Fund’s portfolio will be leveraged if it exercises its right to delay payment on a redemption and the value of the Fund’s assets declines between the time a redemption request is treated as being received by the Fund and the time the Fund liquidates assets to fund that redemption.
Large Transactions Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	●Large Transactions Risk – To the extent that a large number of shares of the Fund is held by a single shareholder (e.g., an institutional investor or another GMO Fund) or a group of shareholders with a common investment strategy (e.g., GMO asset allocation accounts), the Fund is subject to the risk that a redemption by (or caused by) that shareholder or group will require the Fund to sell investments at disadvantageous prices, disrupt the Fund’s operations, lead to temporary overexposure to the Fund’s intended investment program or force the Fund’s liquidation. The Fund also may be subject to these effects when a number of shareholders collectively redeem or sell a large amount of Fund shares.
Risk Lose Money [Member]
Prospectus [Line Items]
Risk [Text Block]	Many factors can affect this value, and you may lose money by investing in the Fund.
Risk Not Insured Depository Institution [Member]
Prospectus [Line Items]
Risk [Text Block]	An investment in the Fund is not a bank deposit and is not insured or guaranteed by the FDIC or any government agency.

GMO Climate Change Fund Investment Risks - GMO Climate Change Fund

Feb. 28, 2025

●Focused Investment Risk − Because the Fund focuses its investments in securities of companies involved in climate change-related industries, the Fund will be more susceptible to events or factors affecting these companies, and the market prices of its portfolio securities may be more volatile than those of mutual funds that are more diversified. The Fund is particularly exposed to such developments as changes in global and regional climates, environmental protection regulatory actions, changes in government standards and subsidy levels, changes in taxation and other domestic and international political, regulatory and economic developments (such as potential cutbacks on funding for the Environmental Protection Agency). Companies involved in alternative fuels also may be adversely affected by the increased use of, or decreases in prices for, oil or other fossil fuels. Such companies are often capital-intensive and use significant amounts of leverage, subjecting them to the risk of rising interest rates that could adversely affect their ability to repay debt issued to finance capital projects and/or to borrow or otherwise raise additional money to finance those projects. In addition, scientific developments, such as breakthroughs in the remediation of global warming, and changes in governmental policies relating to the effects of pollution may affect investments in pollution control, which could in turn affect these companies. Such companies also may be significantly affected by technological changes in industries focusing on energy, pollution control and mitigation of global warming. Because society’s focus on climate change issues is relatively new, the emphasis and direction of governmental policies is subject to significant change, and rapid technological change could render even new approaches and products obsolete. Some companies involved in climate change-related industries have more limited operating histories and smaller market capitalizations on average than companies in other sectors. As a result of these and other factors, the market prices of securities of companies involved in climate change-related industries tend to be considerably more volatile than those of companies in more established sectors and industries.

Prospectus [Line Items]

Risk [Text Block]

●Market Risk – Equities – The market price of an equity in the Fund’s portfolio may decline due to factors affecting the issuer or its industry or the economy and equity markets generally. If the Fund purchases an equity for less than its fundamental fair (or intrinsic) value as assessed by GMO, the Fund runs the risk that the market price of the equity will not appreciate or will decline (for example, if GMO’s assessment proves to be incorrect or the market fails to recognize the equity’s intrinsic value). The Fund also may purchase equities that typically trade at higher multiples of current earnings than other securities, and the market prices of these equities often are more sensitive to changes in future earnings expectations and interest rates than the market prices of equities trading at lower multiples. Declines in stock market prices generally are likely to reduce the net asset value of the Fund’s shares.

Management and Operational Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

●Management and Operational Risk – The Fund runs the risk that GMO’s investment techniques will fail to produce intended results.The Fund also runs the risk that GMO’s assessment of an investment, including a security’s fundamental fair (or intrinsic) value, is wrong or that deficiencies in GMO’s or another service provider’s internal systems or controls will cause losses for the Fund or impair Fund operations.

Smaller Company Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

●Smaller Company Risk – Smaller companies may have limited product lines, markets, or financial resources, lack the competitive strength of larger companies, have less experienced managers or depend on a few key employees. The securities of companies with smaller market capitalizations often are less widely held and trade less frequently and in lesser quantities, and their market prices often fluctuate more, than the securities of companies with larger market capitalizations.

Non-U.S. Investment Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

●Non-U.S. Investment Risk – The market prices of many non-U.S. securities fluctuate more than those of U.S. securities. Many non-U.S. securities markets are less stable, smaller, less liquid, and less regulated than U.S. securities markets, and the cost of trading in those markets often is higher than in U.S. securities markets. In addition, non-U.S. securities issuers often are not subject to as much regulation as U.S. issuers, and the reporting, recordkeeping, accounting, custody, and auditing standards to which those issuers are subject often are not as rigorous as U.S. standards. In addition, the Fund is subject to taxation by countries other than the United States, including potentially on a retroactive basis, on (i) capital gains it realizes or dividends, interest, or other amounts it realizes or accrues in respect of non-U.S. investments; (ii) transactions in those investments; and (iii) repatriation of proceeds generated from the sale or other disposition of those investments. Also, the Fund needs a license to invest directly in securities traded in many non-U.S. securities markets, and the Fund is subject to the risk that its license is terminated or suspended. In some non-U.S. securities markets, prevailing custody and trade settlement practices (e.g., the requirement to pay for securities prior to receipt) expose the Fund to credit and other risks. Further, adverse changes in investment regulations, capital requirements or exchange controls could adversely affect the value of the Fund’s investments. The risks above (such as substantial price fluctuations and market instability, illiquidity and lack of regulation) and other risks (e.g., nationalization, expropriation or other confiscation of assets of non-U.S. issuers, difficulties enforcing legal judgments or contractual rights and geopolitical risks) tend to be higher for investments in the securities of issuers tied economically to emerging countries. The economies of emerging countries often depend predominantly on only a few industries or commodities and often are more volatile than the economies of developed countries.

Illiquidity Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

●Illiquidity Risk – Low trading volume, lack of a market maker, large position size, or legal restrictions increase the risk that the Fund or an underlying fund is limited or prevented from selling particular securities or closing derivative positions at desirable prices at a particular time or at all.

Market Disruption and Geopolitical Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

●Market Disruption and Geopolitical Risk – Geopolitical and other events (e.g., wars, pandemics, sanctions, terrorism, diplomatic tensions, dramatic changes in regulatory and/or foreign policy, cyberattacks, and rapid technological developments such as artificial intelligence) often disrupt securities markets and adversely affect the general economy or particular economies and markets. Those events, as well as other changes in non-U.S. and U.S. economic and political conditions, could exacerbate other risks or otherwise reduce the value of the Fund’s investments.

Commodities Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

●Commodities Risk – Commodity prices can be extremely volatile, and exposure to commodities can cause the net asset value of the Fund’s shares to decline or fluctuate significantly in a rapid and unpredictable manner.

Currency Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

●Currency Risk – Fluctuations in exchange rates can adversely affect the market value of the Fund’s foreign currency holdings and investments denominated in foreign currencies.

Derivatives and Short Sales Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

●Derivatives and Short Sales Risk – The use of derivatives involves the risk that their value may not change as expected relative to changes in the value of the underlying assets, pools of assets, rates, currencies or indices. Derivatives also present other risks, including market risk, illiquidity risk, currency risk, credit risk, leveraging risk, commodities risk and counterparty risk. The market price of an option is affected by many factors, including changes in the market prices or dividend rates of underlying securities (or in the case of indices, the securities in such indices); the time remaining before expiration; changes in interest rates or exchange rates; and changes in the actual or perceived volatility of the relevant index or underlying securities. The Fund typically creates short investment exposure by selling securities short or by taking a derivative position in which the value of the derivative moves in the opposite direction from the price of an underlying asset, pool of assets, rate, currency or index. Specifically, the net asset value of the Fund’s shares will be adversely affected if the securities or other assets that are the subject of the Fund’s short exposures appreciate in value. The risk of loss associated with derivatives that provide short investment exposure and short sales of securities is theoretically unlimited.

Counterparty Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

●Counterparty Risk – The Fund runs the risk that the counterparty to a derivatives contract or a clearing member used by the Fund to hold a cleared derivatives contract is unable or unwilling to make timely settlement payments, return the Fund’s collateral or otherwise honor its obligations.

Leveraging Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

●Leveraging Risk – The use of derivatives, short sales and securities lending can create leverage. Leverage increases the Fund’s losses when the value of its investments (including derivatives) declines. In addition, the Fund’s portfolio will be leveraged if it exercises its right to delay payment on a redemption and the value of the Fund’s assets declines between the time a redemption request is treated as being received by the Fund and the time the Fund liquidates assets to fund that redemption.

Large Transactions Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

●Large Transactions Risk – To the extent that a large number of shares of the Fund is held by a single shareholder (e.g., an institutional investor or another GMO Fund) or a group of shareholders with a common investment strategy (e.g., GMO asset allocation accounts), the Fund is subject to the risk that a redemption by (or caused by) that shareholder or group will require the Fund to sell investments at disadvantageous prices, disrupt the Fund’s operations, lead to temporary overexposure to the Fund’s intended investment program or force the Fund’s liquidation. The Fund also may be subject to these effects when a number of shareholders collectively redeem or sell a large amount of Fund shares.

Risk Lose Money [Member]

Prospectus [Line Items]

Risk [Text Block]

Many factors can affect this value, and you may lose money by investing in the Fund.

Risk Not Insured Depository Institution [Member]

Prospectus [Line Items]

Risk [Text Block]

An investment in the Fund is not a bank deposit and is not insured or guaranteed by the FDIC or any government agency.