Label

Element

Value

Risk/Return:

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Registrant Name

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TRANSAMERICA FUNDS

Prospectus Date

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Mar. 01, 2015

Transamerica Tactical Allocation

Risk/Return:

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Risk/Return [Heading]

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TRANSAMERICA TACTICAL ALLOCATION

Objective [Heading]

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Investment Objective:

Objective, Primary [Text Block]

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Seeks to maximize long term total return.

Expense [Heading]

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Fees and Expenses:

Expense Narrative [Text Block]

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This table describes the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Transamerica Funds. More information about these and other discounts is available from your financial professional and in the “Waivers and/or Reductions of Charges” section on page 339 of the fund’s prospectus and in the fund’s statement of additional information (SAI) under the heading “Purchase of Shares.”

Shareholder Fees Caption [Text]

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Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

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Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

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March 1, 2016

Portfolio Turnover [Heading]

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Portfolio Turnover:

Portfolio Turnover [Text Block]

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The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the fund’s performance.

During the most recent fiscal year, the portfolio turnover rate for the fund was 228% of the average value of its portfolio.

Portfolio Turnover, Rate

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228.00%

Expense Breakpoint Discounts [Text]

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You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Transamerica Funds.

Expense Breakpoint, Minimum Investment Required [Amount]

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50,000

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

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Total annual fund operating expenses do not correlate to the ratios of expenses to average net assets in the financial highlights table, which do not include acquired (i.e., underlying) funds' fees and expenses and do not reflect the reduction of 0.05% in the distribution and services (12b-1) fees on Class A shares effective March 1, 2014 for an entire fiscal year.

Expense Example [Heading]

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Example:

Expense Example Narrative [Text Block]

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This Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all shares at the end of those periods (unless otherwise indicated). The Example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example by, Year, Caption [Text]

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If the shares are redeemed at the end of each period:

Expense Example, No Redemption, By Year, Caption [Text]

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If the shares are not redeemed:

Strategy [Heading]

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Principal Investment Strategies:

Strategy Narrative [Text Block]

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The fund’s sub-adviser, Aegon USA Investment Management, LLC (the “sub-adviser”) seeks to achieve the fund’s objective by investing primarily in a combination of underlying exchange-traded funds (“ETFs”).

The sub-adviser seeks to achieve the fund’s objectives by utilizing both tactical and strategic asset allocation strategies. The sub-adviser’s tactical asset allocation strategy involves making short-term adjustments to the fund’s asset mix, utilizing the sub-adviser’s research on various risk and return considerations, in an effort to optimize returns relative to risks as market and economic conditions change. The sub-adviser’s strategic asset allocation strategy is similar, but with a somewhat longer-term outlook. The sub-adviser’s selections of individual ETFs to populate the allocation to a given asset class may be driven by strategic or tactical considerations.

Under normal circumstances, the sub-adviser expects to allocate substantially all of the fund’s assets among underlying ETFs to achieve targeted exposure to global equities, commodities and derivative instruments, as well as U.S. and international fixed income securities. The allocation of fund assets will generally vary as follows: 16% to 70% of the fund’s net assets in global equities, including emerging markets; 0% to 8% of net assets in inflation-protected securities; 0% to 15% of net assets in commodities; 14% to 70% of net assets in fixed income securities; and 0% to 5% of its net assets in derivative instruments. The fixed income exposure may include U.S. and non-U.S. corporate bonds and U.S. Treasuries of any maturity, sovereign debt of developed and emerging market countries, and inflation-protected bonds. The fund may invest up to 35% of its net assets in high yield bonds (commonly known as “junk bonds”). The fund may also invest in ETFs (including leveraged, inverse and inverse leveraged ETFs) that use derivatives to achieve or amplify the return (or the inverse of the return) of an underlying index or benchmark, but the fund’s investments in leveraged, inverse and inverse leveraged ETFs will be limited to 5% of the fund’s net assets. The fund may invest in companies of any capitalization.

The sub-adviser actively and tactically rotates the fund’s assets among various asset classes in an effort to take advantage of changing economic conditions that the sub-adviser believes favor one asset class over another. Based on the analysis of various economic indicators, the sub-adviser will increase the allocation to the asset classes that the sub-adviser believes have a higher probability of contributing to outperformance relative to the fund’s benchmark. Tactical strategies tend to have higher turnover than index or other strategies that adhere to a long term allocation.

The sub-adviser uses a three step investment process to construct and manage the fund’s portfolio. In the first step, the sub-adviser employs a global “top down” approach in which the sub-adviser analyzes various factors that affect the movement of markets and securities prices worldwide. This step attempts to translate the sub-adviser’s top down qualitative analysis, as well as its strategic and tactical views, into an asset allocation decision reflecting the foregoing and the fund’s investment objectives. Following determination of the fund’s overall asset allocation, in step two, the sub-adviser determines sector allocations and selects and determines the weights of specific ETFs to populate each sector allocation. The sub-adviser selects and determines the weights of fixed income ETFs based on a combination of the sub-adviser’s top down analysis and a relative value and “bottom up” approach, which takes into account various qualitative factors. The sub-adviser uses quantitative models to guide the selection of equity ETFs. The sub-adviser may in its discretion adjust, change, or even disregard any model at any time. In step three, the sub-adviser reviews and may make adjustments to the portfolio constructed in the first two steps, based on the sub-adviser’s views of the market and general economic conditions.

Each underlying ETF has its own investment objective, principal investment strategies and investment risks. It is not possible to predict the extent to which the fund will be invested in a particular underlying ETF at any time. The fund may be a significant shareholder in certain underlying ETFs. The sub-adviser may change the fund’s asset allocations and underlying ETFs at any time without investor approval and without notice to investors.

Risk [Heading]

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Principal Risks:

Risk Narrative [Text Block]

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Risk is inherent in all investing. Many factors affect the fund's performance. There is no assurance the fund will meet its investment objective. The value of your investment in the fund, as well as the amount of return you receive on your investment, may fluctuate significantly. You may lose part or all of your investment in the fund or your investment may not perform as well as other similar investments. The fund may take temporary defensive positions; in such a case, the fund will not be pursuing its principal investment strategies. The fund, through its investments in underlying funds, is subject to the risks of the underlying funds. The following is a summary description of principal risks (in alphabetical order) of investing in the fund (either directly or through its investments in underlying funds). Each risk described below may not apply to each underlying fund and an underlying fund may be subject to additional or different risks than those described below. You may lose money if you invest in this fund.

• Active Trading – The fund is actively managed and may purchase and sell securities without regard to the length of time held. Active trading may have a negative impact on performance by increasing transaction costs and may generate greater amounts of net short-term capital gains, which, for shareholders holding shares in taxable accounts, would be subject to tax at ordinary income tax rates upon distribution.

• Asset Allocation – The sub-adviser allocates the fund's assets among various asset classes and underlying funds. These allocations may be unsuccessful in maximizing the fund's return and/or avoiding investment losses, and may cause the fund to underperform.

• Asset Class Variation – The underlying funds invest principally in the securities constituting their asset class (i.e., equity or fixed income). However, under normal market conditions, an underlying fund may vary the percentage of its assets in these securities (subject to any applicable regulatory requirements). Depending upon the percentage of securities in a particular asset class held by the underlying funds at any given time, and the percentage of the fund's assets invested in various underlying funds, the fund's actual exposure to the securities in a particular asset class may vary substantially from its target allocation for that asset class.

• Commodities – To the extent the fund invests in commodities or instruments whose performance is linked to the price of an underlying commodity or commodity index, the fund will be subject to the risks of investing in commodities, including regulatory, economic and political developments, weather events and natural disasters and market disruptions. The fund's investment exposure to the commodities markets may subject the fund to greater volatility than investments in more traditional securities, such as stocks and bonds. Commodities and commodity-linked investments may be less liquid than other investments. Commodity-linked investments are subject to the credit risks associated with the issuer, and their values may decline substantially if the issuer's creditworthiness deteriorates.

• Counterparty – The fund will be subject to credit risk (that is, where changes in an issuer’s financial strength or credit rating may affect an instrument’s value) with respect to the amount it expects to receive from counterparties to derivatives, repurchase agreements and other financial contracts entered into by the fund or held by special purpose or structured vehicles. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, the value of your investment in the fund may decline.

• Credit – If an issuer or other obligor (such as a party providing insurance or other credit enhancement) of a security held by the fund or a counterparty to a financial contract with the fund defaults or is downgraded, or is perceived to be less creditworthy, or if the value of any underlying assets declines, the value of your investment will typically decline. Below investment grade, high-yield debt securities (commonly known as “junk bonds”) have a higher risk of default and are considered speculative. Subordinated securities are more likely to suffer a credit loss than non-subordinated securities of the same issuer and will be disproportionately affected by a default, downgrade or perceived decline in creditworthiness.

• Currency – The value of investments in securities denominated in foreign currencies increases or decreases as the rates of exchange between those currencies and the U.S. dollar change. Currency conversion costs and currency fluctuations could reduce or eliminate investment gains or add to investment losses. Currency exchange rates can be volatile, and are affected by factors such as general economic conditions, the actions of the U.S. and foreign governments or central banks, the imposition of currency controls, and speculation.

• Derivatives – Using derivatives exposes the fund to additional risks and can increase fund losses and reduce opportunities for gains when market prices, interest rates or the derivatives themselves behave in a way not anticipated by the fund. Using derivatives also can have a leveraging effect and increase fund volatility. The fund may also have to sell assets at inopportune times to satisfy its obligations. Derivatives may be difficult to sell, unwind or value, and the counterparty may default on its obligations to the fund. The fund's investments in derivative instruments may involve a small investment relative to the amount of investment exposure assumed and may result in losses exceeding the amounts invested in those instruments. Certain derivatives have the potential for unlimited loss, regardless of the size of the initial investment. The U.S. government is in the process of adopting and implementing regulations governing derivatives markets, including mandatory clearing of certain derivatives, margin and reporting requirements. The ultimate impact of the regulations remains unclear. Additional regulation of derivatives may make them more costly, may limit their availability, may disrupt markets or may otherwise adversely affect their value or performance.

• Emerging Markets – Investments in the securities of issuers located in or principally doing business in emerging markets are subject to foreign investments risks. These risks are greater for investments in issuers in emerging market countries. Emerging market countries tend to have economic, political and legal systems that are less fully developed and are less stable than those of more developed countries. Emerging market securities are often particularly sensitive to market movements because their market prices tend to reflect speculative expectations. Low trading volumes may result in a lack of liquidity and in extreme price volatility.

• Equity Securities – Equity securities represent an ownership interest in an issuer, rank junior in a company’s capital structure and consequently may entail greater risk of loss than debt securities. Equity securities include common and preferred stocks. Stock markets are volatile. The price of equity securities fluctuates based on changes in a company’s financial condition and overall market and economic conditions. If the market prices of the equity securities owned by the fund fall, the value of your investment in the fund will decline.

• Extension – When interest rates rise, repayments of fixed income securities, particularly asset- and mortgage-backed securities, may occur more slowly than anticipated, extending the effective duration of these fixed income securities at below market interest rates and causing their market prices to decline more than they would have declined due to the rise in interest rates alone. This may cause the fund’s share price to be more volatile.

• Fixed-Income Securities – The market prices of fixed-income securities may go up or down, sometimes rapidly and unpredictably, due to general market conditions, such as real or perceived adverse economic or political conditions, inflation, changes in interest rates, lack of liquidity in the bond markets or adverse investor sentiment. In addition, the market value of a fixed income security may decline if the issuer or other obligor of the security fails to pay principal and/or interest, otherwise defaults or has its credit rating downgraded or is perceived to be less creditworthy, or the credit quality or value of any underlying assets declines. When market prices fall, the value of your investment will go down. The value of your investment will generally go down when interest rates rise. Interest rates have been at historically low levels, so the fund faces a heightened risk that interest rates may rise. A rise in rates tends to have a greater impact on the prices of longer term or duration securities.

• Focused Investing – To the extent the fund invests in one or more countries, regions, sectors or industries, or in a limited number of issuers, the fund will be more susceptible to negative events affecting those countries, regions, sectors, industries or issuers. Local events, such as political upheaval, financial troubles, or natural disasters may disrupt a country’s or region’s securities markets. Geographic risk is especially high in emerging markets.

• Foreign Investments – Investing in securities of foreign issuers or issuers with significant exposure to foreign markets involves additional risk. Foreign countries in which the fund may invest may have markets that are less liquid, less regulated and more volatile than U.S. markets. The value of the fund’s investments may decline because of factors affecting the particular issuer as well as foreign markets and issuers generally, such as unfavorable government actions, political or financial instability or other adverse economic or political developments. Lack of information and weaker accounting standards also may affect the value of these securities.

• High-Yield Debt Securities – High-yield debt securities, commonly referred to as “junk bonds,” are securities that are rated below “investment grade” (that is, securities rated below Baa/BBB) or, if unrated, determined to be below investment grade by the sub-adviser. Changes in interest rates, the market’s perception of the issuers and the creditworthiness of the issuers may significantly affect the value of these bonds. Junk bonds are considered speculative, have a higher risk of default, tend to be less liquid and may be more difficult to value than higher grade securities. Junk bonds tend to be volatile and more susceptible to adverse events and negative sentiments.

• Inflation-Protected Securities – Inflation-protected debt securities may react differently from other types of debt securities and tend to react to changes in “real” interest rates. Real interest rates represent nominal (stated) interest rates reduced by the expected impact of inflation. In general, the price of an inflation-protected debt security can fall when real interest rates rise, and can rise when real interest rates fall. Interest payments on inflation-protected debt securities can be unpredictable and will vary as the principal and/or interest is adjusted for inflation. Also, the inflation index utilized by a particular inflation-protected security may not accurately reflect the true rate of inflation, in which case the market value of the security could be adversely affected.

• Interest Rate – Interest rates in the U.S. have been at historically low levels, so the fund faces a heightened risk that interest rates may rise. The value of fixed income securities generally goes down when interest rates rise, and therefore the value of your investment in the fund may also go down. Debt securities have varying levels of sensitivity to changes in interest rates. A rise in rates tends to have a greater impact on the prices of longer term or duration securities.

• Leveraging – The value of your investment may be more volatile to the extent that the fund borrows or uses derivatives or other investments that have a leveraging effect on the fund. Other risks also will be compounded. This is because leverage generally magnifies the effect of a change in the value of an asset and creates a risk of loss of value on a larger pool of assets than the fund would otherwise have had. The use of leverage is considered to be a speculative investment practice and may result in the loss of a substantial amount, and possibly all, of the fund's assets. The fund also may have to sell assets at inopportune times to satisfy its obligations.

• Liquidity – The fund may make investments that are illiquid or that become illiquid after purchase. The liquidity and value of investments can deteriorate rapidly and those investments may be difficult or impossible to sell, particularly during times of market turmoil. These illiquid investments may also be difficult to value. If the fund is forced to sell an illiquid investment to meet redemption requests or other cash needs, the fund may be forced to sell at a loss.

• Manager – The fund is subject to the risk that the sub-adviser’s judgments and investment decisions, as well as the methods, tools, resources, information and data, and the analyses employed or relied on by the sub-adviser to make those judgments and decisions may be incorrect or otherwise may not produce the desired results. This could cause the fund to lose value or its results to lag relevant benchmarks or other funds with similar objectives.

• Market – The market prices of the fund's securities may go up or down, sometimes rapidly or unpredictably, due to general market conditions, such as real or perceived adverse economic or political conditions, inflation, changes in interest rates or currency rates, lack of liquidity in the markets or adverse investor sentiment. Adverse market conditions may be prolonged and may not have the same impact on all types of securities. Market prices of securities also may go down due to events or conditions that affect particular sectors, industries or issuers. When market prices fall, the value of your investment will go down. The fund may experience a substantial or complete loss on any individual security. Financial markets in the U.S., Europe and elsewhere have experienced increased volatility and decreased liquidity since the global financial crisis began in 2008. Governmental and non-governmental issuers defaulted on, or were forced to restructure, their debts. These market conditions may continue, worsen or spread. The U.S. government and the Federal Reserve, as well as certain foreign governments and their central banks have taken steps to support financial markets, including keeping interest rates at historically low levels. More recently, the Federal Reserve has reduced its market support activities. Further reduction or withdrawal of this support, or other related efforts in response to the crisis could negatively affect financial markets generally and increase market volatility as well as result in higher interest rates and reduce the value and liquidity of certain securities. This environment could make identifying investment risks and opportunities especially difficult for the sub-adviser. Whether or not the fund invests in securities of issuers located in or with significant exposure to countries experiencing economic and financial difficulties, the value and liquidity of the fund's investments may be negatively affected. In addition, policy and legislative changes in the United States and in other countries are affecting many aspects of financial regulation, and in some instances may contribute to decreased liquidity and increased volatility in the financial markets.

• 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 can be no assurance that the use of Models will result in effective investment decisions for the fund.

• Mortgage-Related and Asset-Backed Securities – The value of mortgage-related and asset-backed securities will be influenced by factors affecting the housing market and the assets underlying such securities. As a result, during periods of declining asset values, difficult or frozen credit markets, swings in interest rates, or deteriorating economic conditions, mortgage-related and asset-backed securities may decline in value, face valuation difficulties, become more volatile and/or become illiquid. Mortgage-backed securities may be issued by private issuers, by government-sponsored entities such as Fannie Mae or Freddie Mac or by agencies of the U.S. government, such as Ginnie Mae. Mortgage-backed securities represent direct or indirect participations in, or are collateralized by and payable from, mortgage loans secured by real property. Unlike mortgage-related securities issued or guaranteed by agencies of the U.S. government or government-sponsored entities, mortgage-related securities issued by private issuers do not have a government or government-sponsored entity guarantee (but may have other credit enhancement), and may, and frequently do, have less favorable collateral, credit risk or other underwriting characteristics. Asset-backed securities represent participations in, or are secured by and payable from, assets such as installment sales or loan contracts, leases, credit card receivables and other categories of receivables. The value of mortgage-backed and asset-backed securities may be affected by changes in credit quality or value of the mortgage loans or other assets that support the securities. Mortgage-backed and asset-backed securities are subject to prepayment or call and extension risks. Some of these securities may receive little or no collateral protection from the underlying assets. The risk of default is generally higher in the case of mortgage-backed investments that include so-called “sub-prime” mortgages. The structure of some of these securities may be complex and there may be less information available than for other types of debt securities. Upon the occurrence of certain triggering events or defaults, the fund may become the holder of underlying assets at a time when those assets may be difficult to sell or may be sold only at a loss.

• Portfolio Selection – The value of your investment may decrease if the sub-adviser’s judgment about the quality, relative yield, value or market trends affecting a particular security or issuer, industry, sector, region or market segment, or about the economy or interest rates is incorrect.

• Prepayment or Call – Many issuers have a right to prepay their securities. If interest rates fall, an issuer may exercise this right. If this happens, the fund will not benefit from the rise in market price that normally accompanies a decline in interest rates, and will be forced to reinvest prepayment proceeds at a time when yields on securities available in the market are lower than the yield on the prepaid security. The fund also may lose any premium it paid on the security.

• Small and Medium Capitalization Companies – The fund will be exposed to additional risks as a result of its investments in the securities of small or medium capitalization companies. Small or medium capitalization companies may be more at risk than large capitalization companies because, among other things, they may have limited product lines, operating history, market or financial resources, or because they may depend on a limited management group. The prices of securities of small and medium capitalization companies generally are more volatile than those of large capitalization companies and are more likely to be adversely affected than large capitalization companies by changes in earnings results and investor expectations or poor economic or market conditions. Securities of small and medium capitalization companies may underperform large capitalization companies, may be harder to sell at times and at prices the portfolio managers believe appropriate and may offer greater potential for losses.

• Sovereign Debt – Sovereign debt instruments are subject to the risk that the governmental entity may delay or fail to pay interest or repay principal on its sovereign debt. If a governmental entity defaults, it may ask for more time in which to pay or for further loans. There may be no established legal process for collecting sovereign debt that a government does not pay, nor are there bankruptcy proceedings through which all or part of the sovereign debt that a governmental entity has not repaid may be collected.

• Structured Instruments – The fund may invest in, or have exposure to, various types of structured instruments, including securities that have demand, tender or put features, or interest rate reset features. Structured instruments are a type of derivative instrument and the payment and credit qualities of these instruments derive from the assets embedded in the structure from which they are issued. Structured instruments may behave in ways not anticipated by the fund, or they may not receive tax, accounting or regulatory treatment anticipated by the fund.

• Tactical and Strategic Asset Allocation – Tactical asset allocation strategy involves making short-term adjustments to the fund's asset mix, utilizing the sub-adviser’s research on various risk and return considerations, in an effort to optimize returns relative to risks as market and economic conditions change. Strategic asset allocation strategy is similar, but with a somewhat longer-term outlook. These strategies tend to produce higher turnover than those that adhere to a longer term outlook, which may result in higher transaction costs. These strategies may not work as intended. The fund may not achieve its objective and may not perform as well as other funds using other asset management strategies.

• Underlying Exchange Traded Funds – Because the fund invests its assets in various underlying ETFs, its ability to achieve its investment objective depends largely on the performance of the underlying ETFs in which it invests. 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.
  
  Equity-based ETFs are subject to risks similar to those of stocks; fixed income-based ETFs are subject to risks similar to those of fixed-income securities. An investment in an ETF generally presents the same primary risks as an investment in a conventional fund (i.e., one that is not exchange-traded) that has the same investment objectives, strategies and policies. The price of an ETF can fluctuate up and down, and the fund could lose money investing in an ETF if the prices of the securities owned by the ETF go down. In addition, ETFs are subject to the following risks that do not apply to conventional funds: (i) the market price of an ETF’s shares may be above or below the shares’ net asset value; (ii) during periods of market volatility, the share prices of ETFs may deviate significantly from their NAVs; (iii) an active trading market for an ETF’s shares may not develop or be maintained; or (iv) trading of an ETF’s shares may be halted if the listing exchange’s officials deem such action appropriate, the shares are delisted from the exchange or the activation of market-wide “circuit breakers” (which are tied to large decreases in stock prices) halts stock trading generally.

• U.S. Government Agency Obligations – Government agency obligations have different levels of credit support and, therefore, different degrees of credit risk. Securities issued by agencies and instrumentalities of the U.S. government that are supported by the full faith and credit of the U.S. generally present a lesser degree of credit risk than securities issued by agencies and instrumentalities sponsored by the U.S. government that are supported only by the issuer’s right to borrow from the U.S. Treasury and securities issued by agencies and instrumentalities sponsored by the U.S. government that are supported only by the credit of the issuing agencies. Although the U.S. government has provided financial support to the Federal National Mortgage Association (“Fannie Mae”) and the Federal Home Loan Mortgage Corporation (“Freddie Mac”) in the past, there can be no assurance that it will support these or other government sponsored entities in the future.

• Valuation – 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 that use matrix or evaluated pricing systems, or that are valued using a fair value methodology.

Risk Lose Money [Text]

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You may lose money if you invest in this fund.

Bar Chart and Performance Table [Heading]

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Performance:

Performance Narrative [Text Block]

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The bar chart and the table below provide some indication of the risks of investing in the fund. The bar chart shows how the fund’s performance has varied from year to year. The table shows how the fund’s average annual total returns for different periods compare to the returns of a broad measure of market performance, as well as comparison to one or more indices. The bar chart does not reflect the impact of sales charges, which, if reflected, would lower the returns. The table includes deduction of applicable sales charges. Absent any limitation of the fund’s expenses, total returns would be lower. Index returns are since the inception of the oldest share class.

As with all mutual funds, past performance (before and after taxes) is not a prediction of future results. Updated performance information is available on our website at www.transamerica.com/individual/products/mutual-funds/performance/index.html or by calling 1-888-233-4339.

Performance Information Illustrates Variability of Returns [Text]

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The bar chart and the table below provide some indication of the risks of investing in the fund. The bar chart shows how the fund’s performance has varied from year to year. The table shows how the fund’s average annual total returns for different periods compare to the returns of a broad measure of market performance, as well as comparison to one or more indices.

Performance Availability Phone [Text]

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1-888-233-4339

Performance Availability Website Address [Text]

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www.transamerica.com/individual/products/mutual-funds/performance/index.html

Performance Past Does Not Indicate Future [Text]

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As with all mutual funds, past performance (before and after taxes) is not a prediction of future results.

Bar Chart [Heading]

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Annual Total Returns (calendar years ended December 31) - Class A

Bar Chart Does Not Reflect Sales Loads [Text]

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The bar chart does not reflect the impact of sales charges, which, if reflected, would lower the returns.

Bar Chart Closing [Text Block]

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	Quarter Ended	Return
Best Quarter:	06/30/2014	3.26%
Worst Quarter:	09/30/2014	-3.01%

Performance Table Heading

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Average Annual Total Returns (periods ended December 31, 2014)

Performance Table Does Reflect Sales Loads

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The table includes deduction of applicable sales charges.

Performance Table Uses Highest Federal Rate

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The after-tax returns are calculated using the historic highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

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Actual after-tax returns may depend on the investor’s individual tax situation and may differ from those shown. After-tax returns may not be relevant if the investment is made through a tax-exempt or tax-deferred account, such as a 401(k) plan.

Performance Table One Class of after Tax Shown [Text]

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After-tax returns are presented for only one class and returns for other classes will vary.

Performance Table Narrative

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The Transamerica Tactical Allocation Blended Benchmark consists of the following: FTSE All-World Index Total Return, 60%, and Barclays Global Aggregate Index, 40%. Calculations assume dividends and capital gains are reinvested and do not include any managerial expenses.

Performance Table Closing [Text Block]

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The after-tax returns are calculated using the historic highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns may depend on the investor’s individual tax situation and may differ from those shown. After-tax returns may not be relevant if the investment is made through a tax-exempt or tax-deferred account, such as a 401(k) plan.After-tax returns are presented for only one class and returns for other classes will vary.

Transamerica Tactical Allocation | A

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.50%

Maximum deferred sales charge (load) (as a percentage of purchase price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

Management fees

rr_ManagementFeesOverAssets

0.55%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses

rr_OtherExpensesOverAssets

0.68%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.23%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.71%

^[1]

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.38%

^[2]

Total annual fund operating expenses after fee waiver and/or expense reimbursement

rr_NetExpensesOverAssets

1.33%

1 year

rr_ExpenseExampleYear01

678

3 years

rr_ExpenseExampleYear03

1,024

5 years

rr_ExpenseExampleYear05

1,393

10 years

rr_ExpenseExampleYear10

2,428

1 year

rr_ExpenseExampleNoRedemptionYear01

678

3 years

rr_ExpenseExampleNoRedemptionYear03

1,024

5 years

rr_ExpenseExampleNoRedemptionYear05

1,393

10 years

rr_ExpenseExampleNoRedemptionYear10

2,428

2013

rr_AnnualReturn2013

6.27%

2014

rr_AnnualReturn2014

2.27%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2014

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

3.26%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2014

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(3.01%)

1 Year

rr_AverageAnnualReturnYear01

2.27%

Since Inception

rr_AverageAnnualReturnSinceInception

4.57%

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 31, 2012

Transamerica Tactical Allocation | C

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (load) (as a percentage of purchase price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Management fees

rr_ManagementFeesOverAssets

0.55%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses

rr_OtherExpensesOverAssets

0.66%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.23%

Total annual fund operating expenses

rr_ExpensesOverAssets

2.44%

^[1]

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.36%

^[2]

Total annual fund operating expenses after fee waiver and/or expense reimbursement

rr_NetExpensesOverAssets

2.08%

1 year

rr_ExpenseExampleYear01

311

3 years

rr_ExpenseExampleYear03

726

5 years

rr_ExpenseExampleYear05

1,268

10 years

rr_ExpenseExampleYear10

2,749

1 year

rr_ExpenseExampleNoRedemptionYear01

211

3 years

rr_ExpenseExampleNoRedemptionYear03

726

5 years

rr_ExpenseExampleNoRedemptionYear05

1,268

10 years

rr_ExpenseExampleNoRedemptionYear10

2,749

1 Year

rr_AverageAnnualReturnYear01

1.53%

Since Inception

rr_AverageAnnualReturnSinceInception

3.82%

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 31, 2012

Transamerica Tactical Allocation | I

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (load) (as a percentage of purchase price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

Management fees

rr_ManagementFeesOverAssets

0.55%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.66%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.23%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.44%

^[1]

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.36%

^[2]

Total annual fund operating expenses after fee waiver and/or expense reimbursement

rr_NetExpensesOverAssets

1.08%

1 year

rr_ExpenseExampleYear01

110

3 years

rr_ExpenseExampleYear03

420

5 years

rr_ExpenseExampleYear05

753

10 years

rr_ExpenseExampleYear10

1,693

1 year

rr_ExpenseExampleNoRedemptionYear01

110

3 years

rr_ExpenseExampleNoRedemptionYear03

420

5 years

rr_ExpenseExampleNoRedemptionYear05

753

10 years

rr_ExpenseExampleNoRedemptionYear10

1,693

1 Year

rr_AverageAnnualReturnYear01

2.55%

Since Inception

rr_AverageAnnualReturnSinceInception

4.88%

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 31, 2012

Transamerica Tactical Allocation | Return after taxes on distributions | A

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.57%

Since Inception

rr_AverageAnnualReturnSinceInception

3.00%

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 31, 2012

Transamerica Tactical Allocation | Return after taxes on distributions and sale of fund shares | A

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.33%

Since Inception

rr_AverageAnnualReturnSinceInception

3.14%

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 31, 2012

Transamerica Tactical Allocation | FTSE All-World Index Total Return (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.78%

Since Inception

rr_AverageAnnualReturnSinceInception

14.46%

Transamerica Tactical Allocation | Barclays Global Aggregate Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.59%

Since Inception

rr_AverageAnnualReturnSinceInception

(1.12%)

Transamerica Tactical Allocation | Transamerica Tactical Allocation Blended Benchmark (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.14%

Since Inception

rr_AverageAnnualReturnSinceInception

8.04%

[1] Total annual fund operating expenses do not correlate to the ratios of expenses to average net assets in the financial highlights table, which do not include acquired (i.e., underlying) funds' fees and expenses and do not reflect the reduction of 0.05% in the distribution and services (12b-1) fees on Class A shares effective March 1, 2014 for an entire fiscal year.

[2] Contractual arrangements have been made with the fund's investment adviser, Transamerica Asset Management, Inc. ("TAM"), through March 1, 2016 to waive fees and/or reimburse fund expenses to the extent that the fund's total operating expenses exceed 0.85%, excluding, as applicable, 12b-1 fees, acquired fund fees and expenses, interest, taxes, brokerage commissions, dividend and interest expenses on securities sold short, extraordinary expenses and other expenses not incurred in the ordinary course of the fund's business. These arrangements cannot be terminated prior to March 1, 2016 without the Board of Trustees' consent. TAM is entitled to reimbursement by the fund of fees waived or expenses reduced during any of the previous 36 months if on any day or month the estimated annualized fund operating expenses are less than the cap.