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Transamerica Large Core ESG Investment Risks - Retail Class [Member] - Transamerica Large Core ESG
Oct. 31, 2025
Market [Member]  
Prospectus [Line Items]  
Risk [Text Block] Market – The market prices of the fund’s securities or other assets may go up or down, sometimes rapidly or unpredictably, due to factors such as economic events, inflation, changes in interest rates, governmental actions or interventions, actions taken by the U.S. Federal Reserve or foreign central banks, market disruptions caused by tariffs, trade disputes, labor strikes, supply chain disruptions or other factors, government shutdowns, political developments, civil unrest, acts of terrorism, armed conflicts, economic sanctions, countermeasures in response to sanctions, cybersecurity events, technological developments (such as artificial intelligence and machine learning) investor sentiment, the global and domestic effects of widespread or local health, weather or climate events, and other factors that may or may not be related to the issuer of the security or other asset. The market price of a security may also fall due to specific conditions that affect a particular sector of the securities market, a particular industry or a particular issuer or group of issuers. To the extent that securities of certain issuers behave or are perceived to behave similarly to each other, the market prices of those securities (or the market as a whole) may fall in response to a decline in the price of a particular security or group of securities. If the market prices of the fund’s securities and assets fall, the value of your investment in the fund could go down. Economies and financial markets throughout the world are increasingly interconnected. Events or circumstances in one or more countries or regions could be highly disruptive to, and have profound impacts on, global economies or markets. As a result, whether or not the fund invests in securities of issuers located in or with significant exposure to the countries directly affected, the value and liquidity of the fund’s investments may go down. The long-term consequences to the U.S. economy of the continued expansion of U.S. government debt and deficits are not known. Also, raising the ceiling on U.S. government debt and periodic legislation to fund the government have become increasingly politicized. Any failure to do either could lead to a default on U.S. government obligations, with unpredictable consequences for the fund’s investments, and generally for economies and markets in the U.S. and elsewhere.
Model And Data [Member]  
Prospectus [Line Items]  
Risk [Text Block] Model and Data – If quantitative models, algorithms or calculations (whether proprietary and developed by the sub-adviser or supplied by third parties) (“Models”) or information or data supplied by third parties (“Data”) prove to be incorrect or incomplete, any decisions made, in whole or part, in reliance thereon expose the fund to additional risks. Models can be predictive in nature. The use of predictive Models has inherent risks. The success of relying on or otherwise using Models depends on a number of factors, including the validity, accuracy and completeness of the Model’s development, implementation and maintenance, the Model’s assumptions, factors, algorithms and methodologies, and the accuracy and reliability of the supplied historical or other Data. Models rely on, among other things, correct and complete Data inputs. If incorrect Data is entered into even a well-founded Model, the resulting information will be incorrect. However, even if Data is input correctly, Model prices may differ substantially from market prices, especially for securities with complex characteristics. Investments selected with the use of Models may perform differently than expected as a result of the design of the Model, inputs into the Model or other factors. There also can be no assurance that the use of Models will result in effective investment decisions for the fund.
Equity Securities [Member]  
Prospectus [Line Items]  
Risk [Text Block] Equity Securities – Equity securities generally have greater risk of loss than debt securities. Stock markets are volatile and the value of equity securities may go up or down, sometimes rapidly and unpredictably. The market price of an equity security may fluctuate based on overall market conditions, such as real or perceived adverse economic or political conditions or trends, tariffs and trade disruptions, wars, social unrest, inflation, substantial economic downturn or recession, changes in interest rates, or adverse investor sentiment. The market price of an equity security also may fluctuate based on real or perceived factors affecting a particular industry or industries or the company itself. If the market prices of the equity securities owned by the fund fall, the value of your investment in the fund will decline. The fund may lose its entire investment in the equity securities of an issuer. A change in financial condition or other event affecting a single issuer may adversely impact securities markets as a whole.
Environmental Social And Governance ESG Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block] Environmental, Social and Governance (“ESG”) Investing – Applying the sub-adviser's ESG criteria to its investment analysis for the fund may impact the sub-adviser’s investment decisions as to securities of certain issuers and, therefore, the fund may forgo some investment opportunities available to funds that do not use ESG criteria or that apply different ESG criteria. Applying ESG criteria may impact the fund’s exposure to risks associated with certain issuers, asset classes, industries and sectors, which may impact the fund’s investment performance. The relevance and weightings of ESG criteria to the sub-adviser’s investment process may vary significantly across issuers, asset classes, industries and sectors. Securities of companies that are identified by the sub-adviser as having favorable ESG characteristics may shift into and out of favor depending on market and economic conditions, and a company’s ESG practices, or the sub-adviser’s assessment of such practices, may change over time. The fund’s performance may at times be better or worse than the performance of similar funds that do not use ESG criteria or that apply different ESG criteria. ESG is not a uniformly defined characteristic and applying ESG criteria involves a subjective assessment. There may be significant differences in views in what constitutes positive or negative ESG characteristics of a company. The sub-adviser’s ESG assessment of a company may differ from that of other funds or investors. The fund’s investments may include securities of issuers that derive revenue from non-ESG activities. ESG ratings and assessments of issuers can vary across third party data providers, and ESG data may be incomplete, delayed, inaccurate or unavailable, which could lead to an incorrect assessment of a company’s ESG characteristics. Data inputs may include information self-reported by companies or from third party data providers. Regulation of ESG investing in the U.S. and abroad is evolving. Regulatory change regarding the definition and/or use of ESG criteria could have a material adverse effect on the fund’s ability to invest in accordance with its ESG strategy.
Large Capitalization Companies [Member]  
Prospectus [Line Items]  
Risk [Text Block] Large Capitalization Companies – The fund’s investments in larger, more established companies may underperform other segments of the market because they may be less responsive to competitive challenges and opportunities and unable to attain high growth rates during periods of economic expansion.
Sector Focus [Member]  
Prospectus [Line Items]  
Risk [Text Block] Sector Focus – To the extent the fund invests more heavily in a particular market sector, the value of the fund’s shares will be especially sensitive to developments that significantly affect that sector and there is increased risk that the fund will lose significant value if conditions adversely affect that sector. Individual sectors may be more volatile, and may perform differently, from the broader market.
Information Technology Sector Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Information Technology Sector – Information technology companies face intense competition and potentially rapid product obsolescence, including due to rapid development of technological innovations and frequent new product introduction. They may face unexpected risks and costs associated with technological developments, such as artificial intelligence and machine learning. Such companies are also heavily dependent on intellectual property rights and may be adversely impacted by the loss, impairment of, or inability to enforce those rights. They are also facing increased government and regulatory scrutiny and may be subject to adverse government or regulatory action. These companies may be developing or marketing new products or services for which markets are not yet established and may never become established.
Management [Member]  
Prospectus [Line Items]  
Risk [Text Block] Management – The value of your investment may go down if the investment manager’s or sub-adviser's judgments and decisions are incorrect or otherwise do not produce the desired results, or if the investment strategy does not work as intended. You may also suffer losses if there are imperfections, errors or limitations in the quantitative, analytic or other tools, resources, information and data used, investment techniques applied, or the analyses employed or relied on, by the investment manager or sub-adviser, if such tools, resources, information or data are used incorrectly or otherwise do not work as intended, or if the investment manager’s or sub-adviser's investment style is out of favor or otherwise fails to produce the desired results. Any of these things could cause the fund to lose value or its results to lag relevant benchmarks or other funds with similar objectives.
Active Trading [Member]  
Prospectus [Line Items]  
Risk [Text Block] Active Trading – The fund may engage in active trading of its portfolio. Active trading will increase transaction costs and could detract from performance. Active trading may be more pronounced during periods of market volatility and may generate greater amounts of short-term capital gains.
Convertible Securities [Member]  
Prospectus [Line Items]  
Risk [Text Block] Convertible Securities – Convertible securities are subject to risks associated with both fixed-income and equity securities. For example, if market interest rates rise, the value of a convertible security typically falls. In addition, a convertible security is subject to the risk that the issuer will not be able to pay interest or dividends when due, and the market value of the security may change based on the issuer’s actual or perceived creditworthiness. Since the convertible security derives a portion of its value from the underlying common stock, the security is also subject to the same types of market and issuer-specific risks that apply to the underlying common stock. Convertible securities generally offer lower interest or dividend yields than non-convertible securities of similar quality.
Cybersecurity [Member]  
Prospectus [Line Items]  
Risk [Text Block] Cybersecurity – Cybersecurity incidents, both intentional and unintentional, may allow an unauthorized party to gain access to fund assets, fund or shareholder data (including private shareholder information), or proprietary information, cause the fund or its service providers (including, but not limited to, the fund’s investment manager, any sub-adviser(s), transfer agent, distributor, custodian, fund accounting agent and financial intermediaries) to suffer data breaches, data corruption or loss of operational functionality, or prevent fund investors from purchasing, redeeming or exchanging shares, receiving distributions or receiving timely information regarding the fund or their investment in the fund. Cybersecurity incidents may render records of fund assets and transactions, shareholder ownership of fund shares, and other data integral to the functioning of the fund inaccessible, inaccurate or incomplete. The use of artificial intelligence and machine learning could exacerbate these risks. Cybersecurity incidents may result in financial losses to the fund and its shareholders, and substantial costs may be incurred in order to prevent or mitigate any future cybersecurity incidents.
Depositary Receipts [Member]  
Prospectus [Line Items]  
Risk [Text Block] Depositary Receipts – Depositary receipts are generally subject to the same risks as are the foreign securities that they evidence or into which they may be converted, and they may be less liquid than the underlying shares in their primary trading market. In addition, depositary receipts expose the fund to risk associated with the non-uniform terms that apply to depositary receipt programs, credit exposure to the depositary bank and to the sponsors and other parties with whom the depositary bank establishes the programs. Holders of depositary receipts may have limited voting rights, and investment restrictions in certain countries may adversely impact the value of depositary receipts because such restrictions may limit the ability to convert equity shares into depositary receipts and vice versa.
ESG Data [Member]  
Prospectus [Line Items]  
Risk [Text Block] ESG Data – ESG information from third-party data providers may be incomplete, inaccurate, delayed or unavailable. There are not currently universally accepted ESG standards or standardized practices for researching, generating, or analyzing ESG data, classifications, screens, and ratings (“ESG Data”). The factors and criteria considered when generating ESG Data and the results of such ESG research may differ widely across third-party ESG Data providers. The evaluation of ESG factors and criteria is often subjective, is often evolving and subject to ongoing refinement, and the third-party ESG Data providers used by the fund may not identify or evaluate every relevant ESG factor and/or criteria with respect to every investment. Due to differences in various countries’ corporate disclosure and financial statement reporting obligations and availability, as well as timeliness of any such available information, a third-party ESG Data provider may not always be successful in identifying material ESG information about a particular company. The fund may invest in companies that do not reflect the beliefs or values of a particular investor and may not be deemed to exhibit the intended ESG characteristics if different metrics or ESG Data providers were used to evaluate them. Because ESG considerations are still an emerging area of investment focus, ESG information and metrics can be difficult to obtain or not able to be obtained. The evaluation of ESG factors and implementation of ESG-related investment restrictions (e.g., screens) rely on the availability of timely, complete, and accurate ESG Data reported by issuers and/or third-party research providers. ESG Data provided by third-party providers may be based on backward-looking analysis and data and may be subject to change in the future. The successful implementation of the fund’s strategy is therefore dependent, in part, on the ESG factors identified and considered and research methodologies employed by applicable third-party ESG Data providers, as well as the timely availability of accurate information. Due to the specialized resources necessary to obtain ESG-related information underlying or related to the ESG Data provided by applicable third-party ESG research firms, the sub-adviser does not independently test or verify the data provided by such firms.
Growth Stocks [Member]  
Prospectus [Line Items]  
Risk [Text Block] Growth Stocks – Returns on growth stocks may not move in tandem with returns on other categories of stocks or the market as a whole. Growth stocks typically are particularly sensitive to market movements and may involve larger price swings because their market prices tend to reflect future expectations. When it appears those expectations may not be met, the prices of growth stocks typically fall. Growth stocks may also be more volatile because they often do not pay dividends. The values of growth stocks tend to go down when interest rates rise because the rise in interest rates reduces the current value of future cash flows. Growth stocks as a group may be out of favor and underperform the overall equity market for a long period of time, for example, while the market favors “value” stocks.
Large Shareholder [Member]  
Prospectus [Line Items]  
Risk [Text Block] Large Shareholder – A significant portion of the fund’s shares may be owned by one or more investment vehicles or institutional investors. Transactions by these large shareholders may be disruptive to the management of the fund. For example, the fund may experience large redemptions and could be required to sell securities at a time when it may not otherwise desire to do so. Such transactions may increase the fund’s brokerage and/or other transaction costs. These transactions may also accelerate the realization of taxable capital gains to shareholders. In addition, sizeable redemptions could cause the fund’s total expenses to increase.
Money Market Funds [Member]  
Prospectus [Line Items]  
Risk [Text Block] Money Market Funds – An investment in a money market fund is not a bank account, and is not insured or guaranteed by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency.  A money market fund’s sponsor is not required to reimburse the fund for losses or to provide financial support to the fund. Although many money market funds seek to maintain a stable net asset value of $1.00 per share, it is possible to lose money by investing in such money market funds. Certain other money market funds float their net asset value.
Preferred Stock [Member]  
Prospectus [Line Items]  
Risk [Text Block] Preferred Stock – Preferred stocks may pay fixed or adjustable rates of return. Preferred stocks are subject to issuer-specific and market risks applicable generally to equity securities, but also risks associated with fixed-income securities, such as interest rate risk. A company’s preferred stocks generally pay dividends only after the company makes required payments to creditors, including holders of its bonds and other debt. As a result, the market prices of preferred stocks are typically more sensitive to changes in the issuer's creditworthiness than are the prices of debt securities. The market value of preferred stocks generally decreases when interest rates rise.
Underlying Exchange Traded Funds [Member]  
Prospectus [Line Items]  
Risk [Text Block] Underlying Exchange-Traded Funds – To the extent the fund invests its assets in underlying ETFs, its ability to achieve its investment objective will depend in part on the performance of the underlying ETFs in which it invests. Investing in underlying ETFs subjects the fund to the risks of investing in the underlying securities or assets held by those ETFs. Each of the underlying ETFs in which the fund may invest has its own investment risks, and those risks can affect the value of the underlying ETFs’ shares and therefore the value of the fund’s investments. There can be no assurance that the investment objective of any underlying ETF will be achieved. To the extent that the fund invests more of its assets in one underlying ETF than in another, the fund will have greater exposure to the risks of that underlying ETF. In addition, the fund will bear a pro rata portion of the operating expenses of the underlying ETFs in which it invests.
US Government Securities [Member]  
Prospectus [Line Items]  
Risk [Text Block] U.S. Government Securities – U.S. government securities are subject to market risk, interest rate risk and credit risk. Securities backed by the Treasury or the full faith and credit of the U.S. government are guaranteed only as to the timely payment of interest and principal when held to maturity. Accordingly, the current market values for these securities will fluctuate with changes in interest rates and the financial condition or credit rating of the U.S. government. Notwithstanding that these securities are backed by the full faith and credit of the U.S. government, circumstances could arise that would prevent the payment of interest or principal. Securities issued by U.S. government-sponsored entities and federal agencies and instrumentalities that are not backed by the full faith and credit of the U.S. government are not funded by congressional appropriations and the securities issued by them are neither issued nor guaranteed by the U.S. government.
Valuation [Member]  
Prospectus [Line Items]  
Risk [Text Block] Valuation – Certain investments may be more difficult to value than other types of investments. The sales price the fund could receive for any particular portfolio investment may differ from the fund's valuation of the investment, particularly for securities that trade in thin or volatile markets, that are priced based upon valuations provided by third party pricing services, or that are valued using a fair value methodology. These differences may increase significantly and affect fund investments more broadly during periods of market volatility. Investors who purchase or redeem fund shares on days when the fund is holding fair-valued securities may receive fewer or more shares or lower or higher redemption proceeds than they would have received if the fund had not fair-valued securities or had used a different valuation methodology. The fund’s ability to value its investments may also be impacted by technological issues and/or errors by pricing services or other third party service providers. Fair value pricing involves subjective judgment, which may prove to be incorrect.
Value Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block] Value Investing – The prices of securities the sub-adviser believes are undervalued may not appreciate as anticipated or may go down. The value approach to investing involves the risk that stocks may remain undervalued, undervaluation may become more severe, or perceived undervaluation may actually represent intrinsic value. Value stocks as a group may be out of favor and underperform the overall equity market for a long period of time, for example, while the market favors “growth” stocks.
Warrants And Rights [Member]  
Prospectus [Line Items]  
Risk [Text Block] Warrants and Rights – Warrants and rights may be considered more speculative than certain other types of investments because they do not entitle a holder to the dividends or voting rights for the securities that may be purchased, and they do not represent any rights in the assets of the issuing company. If the price of the stock to which the warrant or right relates does not rise above the exercise price or the warrant or right otherwise is not exercised before the expiration date, it generally expires without any value and the fund will lose any amount it paid for the warrant or right.
Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] You may lose money if you invest in this 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 Federal Deposit Insurance Corporation or any other government agency.