Investment Risks - Gateway Trust - Classes A, C, N, and Y |
Dec. 31, 2025 |
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| Gateway Equity Call Premium Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | You may lose money by investing in the Fund. |
| Gateway Equity Call Premium Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Fund shares are not bank deposits and are not guaranteed, endorsed or insured by the Federal Deposit Insurance Corporation or any other government agency, and are subject to investment risks, including possible loss of the principal invested. |
| Gateway Equity Call Premium Fund | Call Options Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Call Options Risk: The value of the Fund’s positions in index options will fluctuate in response to changes in the value of the underlying index. Writing index call options limits the opportunity to profit from an increase in the market value of stocks in exchange for up-front cash at the time of selling the call option. Unusual market conditions or the lack of a ready market for any particular option at a specific time may reduce the effectiveness of the Fund’s option-based risk management strategy, and for these and other reasons the Fund’s option strategy may not reduce the Fund’s volatility to the extent desired.
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| Gateway Equity Call Premium Fund | Correlation Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Correlation Risk: The Fund’s ability to manage the volatility of its equity portfolio by writing index options depends on the correlation between the returns of the equity portfolio and those of the index on which the Fund’s index options are written. Accordingly, the effectiveness of the Fund’s index option-based risk management strategy may be reduced to the extent the performance of the Fund’s equity portfolio does not correlate to that of the indices underlying its option positions.
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| Gateway Equity Call Premium Fund | Issuer Exposure Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Issuer Exposure Risk: Although the Fund is “diversified” within the meaning of the Investment Company Act of 1940 (the “1940 Act”), increases in value in certain securities held by the Fund could cause the Fund to be significantly exposed to a relatively small number of issuers. Similarly, although the Fund is not an index fund, in order to reduce the Fund’s performance dispersion from its benchmark the Fund may use investments in other investment companies to increase its exposure to certain issuers to a greater extent than might otherwise be permitted under the 1940 Act. This exposure to a relatively small number of issuers could increase the risk and volatility of the Fund.
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| Gateway Equity Call Premium Fund | Investments in Other Investment Companies Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investments in Other Investment Companies Risk: The Fund will indirectly bear the management, service and other fees of any other investment companies, including exchange-traded funds, in which it invests in addition to its own expenses.
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| Gateway Equity Call Premium Fund | Equity Securities Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Equity Securities Risk: The value of the Fund’s investments in equity securities could be subject to unpredictable declines in the value of individual securities and periods of below-average performance in individual securities or in the equity market as a whole. In the event an issuer is liquidated or declares bankruptcy, the claims of owners of the issuer’s bonds generally take precedence over the claims of those who own preferred stock or common stock. Securities of real estate-related companies and REITs in which the Fund may invest may be considered equity securities, thus subjecting the Fund to the risks of investing in equity securities generally. Small- and mid-capitalization and emerging growth companies may be subject to more abrupt price movements, limited markets and less liquidity than larger, more established companies, which could adversely affect the value of the Fund’s equity portfolio.
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| Gateway Equity Call Premium Fund | Market/Issuer Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market/Issuer Risk: The market value of the Fund’s investments will move up and down, sometimes rapidly and unpredictably, based upon overall market and economic conditions, as well as a number of reasons that directly relate to the issuers of the Fund’s investments, such as management performance, financial condition and demand for the issuers’ goods and services.
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| Gateway Equity Call Premium Fund | Management Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk: A strategy used by the Fund’s portfolio managers may fail to produce the intended result.
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| Gateway Equity Call Premium Fund | Cybersecurity and Technology Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Cybersecurity and Technology Risk: The Fund, its service providers, and other market participants increasingly depend on complex information technology and communications systems, which are subject to a number of different threats and risks that could adversely affect the Fund and its shareholders. Cybersecurity and other operational and technology issues may result in financial losses to the Fund and its shareholders.
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| Gateway Equity Call Premium Fund | Foreign Securities Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Foreign Securities Risk: Investments in foreign securities may be subject to greater political, economic, environmental, credit/counterparty and information risks. Foreign securities may be subject to higher volatility than U.S. securities, varying degrees of regulation and limited liquidity.
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| Gateway Equity Call Premium Fund | Large Shareholder Transaction Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Large Shareholder Transaction Risk: Ownership of shares of the Fund may be concentrated in one or a few large investors. Such investors may redeem shares in large quantities or on a frequent basis. In addition, a large number of shareholders collectively may purchase or redeem Fund shares in large amounts rapidly or unexpectedly (collectively, such transactions are referred to as “large shareholder transactions”). In the event of a large shareholder transaction, the Fund may be required to sell investments at unfavorable times or prices, which may increase realized capital gains, including short-term capital gains taxable as ordinary income for shareholders who hold Fund shares in a taxable account, may accelerate the realization of taxable income to shareholders, may increase transaction costs, and may otherwise negatively impact fund performance. The effects of taxable income and/or gains resulting from large shareholder transactions would particularly impact non-redeeming shareholders who do not hold their Fund shares in an IRA, 401(k) plan or other tax-advantaged plan. In addition, such transactions potentially limit the use of any capital loss carryforwards and certain other losses to offset future realized capital gains (if any). Such transactions may also increase the Fund’s expenses. A number of circumstances may cause the Fund to experience large redemptions, such as changes in the eligibility criteria for the Fund or share class of the Fund; liquidations, reorganizations, repositionings, or other announced Fund events; or changes in investment objectives, strategies, policies, risks, or investment personnel.
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| Gateway Equity Call Premium Fund | REITs Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | REITs Risk: Investments in the real estate industry, including REITs, are particularly sensitive to economic downturns and are sensitive to factors such as changes in real estate values, property taxes and tax laws, interest rates, cash flow of underlying real estate assets, occupancy rates, government regulations affecting zoning, land use and rents and the management skill and creditworthiness of the issuer. Companies in the real estate industry also may be subject to liabilities under environmental and hazardous waste laws. In addition, the value of a REIT is affected by changes in the value of the properties owned by the REIT or mortgage loans held by the REIT. REITs are also subject to default and prepayment risk. Many REITs are highly leveraged, increasing their risk. The Fund will indirectly bear its proportionate share of expenses, including management fees, paid by each REIT in which it invests in addition to the expenses of the Fund. REITs are also subject to the possibilities of failing to qualify for the favorable tax treatment available to REITs under the Internal Revenue Code of 1986, as amended, and failing to maintain their exemptions from registration under the Investment Company Act of 1940, as amended.
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| Gateway Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | You may lose money by investing in the Fund. |
| Gateway Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Fund shares are not bank deposits and are not guaranteed, endorsed or insured by the Federal Deposit Insurance Corporation or any other government agency, and are subject to investment risks, including possible loss of the principal invested. |
| Gateway Fund | Options Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Options Risk: The value of the Fund’s positions in index options will fluctuate in response to changes in the value of the underlying index. Writing index call options limits the opportunity to profit from an increase in the market value of stocks in exchange for up-front cash at the time of selling the call option. The Fund also risks losing all or part of the cash paid for purchasing index put options. Unusual market conditions or the lack of a ready market for any particular option at a specific time may reduce the effectiveness of the Fund’s option strategies, and for these and other reasons the Fund’s option strategies may not reduce the Fund’s volatility to the extent desired.
|
| Gateway Fund | Correlation Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Correlation Risk: The Fund’s ability to manage the volatility of its equity portfolio by writing index options depends on the correlation between the returns of the equity portfolio and those of the index on which the Fund’s index options are written. Accordingly, the effectiveness of the Fund’s index option-based risk management strategy may be reduced to the extent the performance of the Fund’s equity portfolio does not correlate to that of the indices underlying its option positions.
|
| Gateway Fund | Issuer Exposure Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Issuer Exposure Risk: Although the Fund is “diversified” within the meaning of the Investment Company Act of 1940 (the “1940 Act”), increases in value in certain securities held by the Fund could cause the Fund to be significantly exposed to a relatively small number of issuers. Similarly, although the Fund is not an index fund, in order to reduce the Fund’s performance dispersion from its benchmark the Fund may use investments in other investment companies to increase its exposure to certain issuers to a greater extent than might otherwise be permitted under the 1940 Act. This exposure to a relatively small number of issuers could increase the risk and volatility of the Fund.
|
| Gateway Fund | Investments in Other Investment Companies Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investments in Other Investment Companies Risk: The Fund will indirectly bear the management, service and other fees of any other investment companies, including exchange-traded funds, in which it invests in addition to its own expenses.
|
| Gateway Fund | Equity Securities Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Equity Securities Risk: The value of the Fund’s investments in equity securities could be subject to unpredictable declines in the value of individual securities and periods of below-average performance in individual securities or in the equity market as a whole. In the event an issuer is liquidated or declares bankruptcy, the claims of owners of the issuer’s bonds generally take precedence over the claims of those who own preferred stock or common stock. Securities of real estate-related companies and REITs in which the Fund may invest may be considered equity securities, thus subjecting the Fund to the risks of investing in equity securities generally. Small- and mid-capitalization and emerging growth companies may be subject to more abrupt price movements, limited markets and less liquidity than larger, more established companies, which could adversely affect the value of the Fund’s equity portfolio.
|
| Gateway Fund | Market/Issuer Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market/Issuer Risk: The market value of the Fund’s investments will move up and down, sometimes rapidly and unpredictably, based upon overall market and economic conditions, as well as a number of reasons that directly relate to the issuers of the Fund’s investments, such as management performance, financial condition and demand for the issuers’ goods and services. The Adviser will attempt to reduce this risk by implementing various volatility management strategies and techniques. However, there is no guarantee that such strategies and techniques will produce the intended result.
|
| Gateway Fund | Management Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk: A strategy used by the Fund’s portfolio managers may fail to produce the intended result.
|
| Gateway Fund | Cybersecurity and Technology Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Cybersecurity and Technology Risk: The Fund, its service providers, and other market participants increasingly depend on complex information technology and communications systems, which are subject to a number of different threats and risks that could adversely affect the Fund and its shareholders. Cybersecurity and other operational and technology issues may result in financial losses to the Fund and its shareholders.
|
| Gateway Fund | Foreign Securities Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Foreign Securities Risk: Investments in foreign securities may be subject to greater political, economic, environmental, credit/counterparty and information risks.The Fund’s investments in foreign securities also are subject to foreign currency fluctuations and other foreign currency-related risks. Foreign securities may be subject to higher volatility than U.S. securities, varying degrees of regulation and limited liquidity.
|
| Gateway Fund | Large Shareholder Transaction Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Large Shareholder Transaction Risk: Ownership of shares of the Fund may be concentrated in one or a few large investors. Such investors may redeem shares in large quantities or on a frequent basis. In addition, a large number of shareholders collectively may purchase or redeem Fund shares in large amounts rapidly or unexpectedly (collectively, such transactions are referred to as “large shareholder transactions”). In the event of a large shareholder transaction, the Fund may be required to sell investments at unfavorable times or prices, which may increase realized capital gains, including short-term capital gains taxable as ordinary income for shareholders who hold Fund shares in a taxable account, may accelerate the realization of taxable income to shareholders, may increase transaction costs, and may otherwise negatively impact fund performance. The effects of taxable income and/or gains resulting from large shareholder transactions would particularly impact non-redeeming shareholders who do not hold their Fund shares in an IRA, 401(k) plan or other tax-advantaged plan. In addition, such transactions potentially limit the use of any capital loss carryforwards and certain other losses to offset future realized capital gains (if any). Such transactions may also increase the Fund’s expenses. A number of circumstances may cause the Fund to experience large redemptions, such as changes in the eligibility criteria for the Fund or share class of the Fund; liquidations, reorganizations, repositionings, or other announced Fund events; or changes in investment objectives, strategies, policies, risks, or investment personnel.
|
| Gateway Fund | REITs Risk | |
| Prospectus [Line Items] | |
| Risk [Text Block] | REITs Risk: Investments in the real estate industry, including REITs, are particularly sensitive to economic downturns and are sensitive to factors such as changes in real estate values, property taxes and tax laws, interest rates, cash flow of underlying real estate assets, occupancy rates, government regulations affecting zoning, land use and rents and the management skill and creditworthiness of the issuer. Companies in the real estate industry also may be subject to liabilities under environmental and hazardous waste laws. In addition, the value of a REIT is affected by changes in the value of the properties owned by the REIT or mortgage loans held by the REIT. REITs are also subject to default and prepayment risk. Many REITs are highly leveraged, increasing their risk. The Fund will indirectly bear its proportionate share of expenses, including management fees, paid by each REIT in which it invests in addition to the expenses of the Fund. REITs are also subject to the possibilities of failing to qualify for the favorable tax treatment available to REITs under the Internal Revenue Code of 1986, as amended, and failing to maintain their exemptions from registration under the Investment Company Act of 1940, as amended.
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