Label

Element

Value

Risk/Return:

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Registrant Name

dei_EntityRegistrantName

TRANSAMERICA FUNDS

Prospectus Date

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Mar. 01, 2015

Retail Class | Transamerica Flexible Income

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

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TRANSAMERICA FLEXIBLE INCOME

Objective [Heading]

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Investment Objective:

Objective, Primary [Text Block]

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Seeks to provide high total return through a combination of current income and capital appreciation.

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)

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 26% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

26.00%

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]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

50,000

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”), invests, under normal circumstances, at least 80% of the fund’s net assets (plus the amount of borrowings, if any, for investment purposes) in fixed-income securities, including U.S. government and foreign government bonds and notes (including emerging markets), mortgage-backed, commercial mortgage-backed, and asset-backed securities (including collateralized mortgage obligations), corporate bonds of issuers in the U.S. and foreign countries (including emerging markets), convertible bonds and other convertible securities, bank loans and loan participations, structured notes, and preferred securities.

Under normal circumstances, at least 50% of the value of the fund’s assets will be invested in (a) debt securities which have a rating within the four highest grades as determined by Moody’s Investors Services, Inc. (“Moody’s”) (“Aaa, Aa, A or Baa”) or Standard & Poor’s Corporation (“S&P”) (“AAA, AA, A or BBB”); (b) securities issued or guaranteed by the U.S. government or its agencies or instrumentalities; (c) commercial paper rated Prime, Prime-1 or Prime-2 by NCO/Moody’s Commercial Paper Division, Moody’s or A-1 or A-2 by S&P; or (d) cash or cash equivalents. Up to 50% of the value of the fund’s assets may be invested in other debt securities which are not rated by Moody’s or S&P or, if so rated, are not within the grades or ratings referred to above (commonly known as “junk bonds”). The fund may invest up to 20% of its total assets in equity securities, such as common stocks, rights, warrants or preferred stock. The fund may invest in securities of any maturity and does not have a target average duration.

The fund may engage in options and futures transactions, foreign currency transactions, and swap transactions. Instead of investing directly in particular securities, the fund may use instruments such as derivatives, including credit default swaps and futures contracts, and synthetic instruments that are intended to provide economic exposure to the securities or the issuer. The fund may use one or more types of these instruments without limit. These instruments are taken into account when determining compliance with the fund’s 80% policy.

The fund may use short-term trading as a means of managing its portfolio to achieve its investment objectives.

By virtue of short-term trading, the fund may engage in greater buying and selling activity than investment companies which are not permitted to employ such a policy in seeking their investment objectives. Such activity can result in greater costs of operation than is the case with other investment companies, and risks of loss in portfolio value could be greater. Accordingly, an investment in fund shares may be more speculative than an investment in shares of an investment company which cannot engage in short-term trading.

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 following is a summary description of principal risks (in alphabetical order) of investing in the fund. 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.

• Convertible Securities – Convertible securities share investment characteristics of both fixed income and equity securities. However, the value of these securities tends to vary more with fluctuations in the value of the underlying common stock than with fluctuations in interest rates. The value of convertible securities also tends to exhibit lower volatility than the underlying common stock. Convertible securities generally offer lower interest or dividend yields than non-convertible securities of similar quality. The fund could lose money if the issuer of a convertible security is unable to meet its financial obligations or goes bankrupt.

• 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.

• 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.

• 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.

• Loans – Loans are subject to the credit risk of nonpayment of principal or interest. Economic downturns or increases in interest rates may cause an increase in defaults, interest rate risk and liquidity risk. Loans may or may not be collateralized at the time of acquisition, and any collateral may be relatively illiquid or lose all or substantially all of its value subsequent to investment. In the event of bankruptcy of a borrower, the fund could experience delays or limitations with respect to its ability to realize the benefits of any collateral securing a loan. Junior loans, which have a lower place in the borrower’s capital structure than senior loans and may be unsecured, involve a higher degree of overall risk than senior loans of the same borrower. The fund's investments in loans are also subject to prepayment or call risk.

• 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.

• 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.

• Preferred Stock – Preferred stock’s right to dividends and liquidation proceeds is junior to the rights of a company’s debt securities. The value of preferred stock may be subject to factors that affect fixed income and equity securities, including changes in interest rates and in a company’s creditworthiness. The value of preferred stock tends to vary more with fluctuations in the underlying common stock and less with fluctuations in interest rates and tends to exhibit greater volatility. Shareholders of preferred stock may suffer a loss of value if dividends are not paid and have limited voting rights.

• 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.

• 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.

• 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.

• 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. They do not represent any rights in the assets of the issuing company, and cease to have value if not exercised prior to the expiration date.

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. 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. In the “10 Years or Since Inception” column of the table, returns are shown for ten years or since inception of the share class, whichever is less. Index returns are for ten years.

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]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-888-233-4339

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

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:	06/30/2009	12.36%
Worst Quarter:	12/31/2008	-12.66%

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 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.

Retail Class | Transamerica Flexible Income | A

Risk/Return:

rr_RiskReturnAbstract

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

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.75%

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

rr_MaximumDeferredSalesChargeOverOther

none

Management fees

rr_ManagementFeesOverAssets

0.44%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses

rr_OtherExpensesOverAssets

0.20%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.89%

1 year

rr_ExpenseExampleYear01

562

3 years

rr_ExpenseExampleYear03

745

5 years

rr_ExpenseExampleYear05

945

10 years

rr_ExpenseExampleYear10

1,519

1 year

rr_ExpenseExampleNoRedemptionYear01

562

3 years

rr_ExpenseExampleNoRedemptionYear03

745

5 years

rr_ExpenseExampleNoRedemptionYear05

945

10 years

rr_ExpenseExampleNoRedemptionYear10

1,519

2005

rr_AnnualReturn2005

1.41%

2006

rr_AnnualReturn2006

4.80%

2007

rr_AnnualReturn2007

0.79%

2008

rr_AnnualReturn2008

(18.79%)

2009

rr_AnnualReturn2009

30.03%

2010

rr_AnnualReturn2010

12.46%

2011

rr_AnnualReturn2011

3.65%

2012

rr_AnnualReturn2012

12.18%

2013

rr_AnnualReturn2013

3.69%

2014

rr_AnnualReturn2014

3.74%

Highest Quarterly Return, Label

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Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

12.36%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(12.66%)

1 Year

rr_AverageAnnualReturnYear01

3.74%

5 Years

rr_AverageAnnualReturnYear05

7.06%

10 Years

rr_AverageAnnualReturnYear10

4.75%

Since Inception

rr_AverageAnnualReturnSinceInception

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 29, 1987

Retail Class | Transamerica Flexible Income | B

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

5.00%

Management fees

rr_ManagementFeesOverAssets

0.44%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses

rr_OtherExpensesOverAssets

0.28%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.72%

1 year

rr_ExpenseExampleYear01

675

3 years

rr_ExpenseExampleYear03

842

5 years

rr_ExpenseExampleYear05

1,033

10 years

rr_ExpenseExampleYear10

1,810

1 year

rr_ExpenseExampleNoRedemptionYear01

175

3 years

rr_ExpenseExampleNoRedemptionYear03

542

5 years

rr_ExpenseExampleNoRedemptionYear05

933

10 years

rr_ExpenseExampleNoRedemptionYear10

1,810

1 Year

rr_AverageAnnualReturnYear01

2.97%

5 Years

rr_AverageAnnualReturnYear05

6.18%

10 Years

rr_AverageAnnualReturnYear10

4.14%

Since Inception

rr_AverageAnnualReturnSinceInception

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 01, 1995

Retail Class | Transamerica Flexible Income | 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

0.44%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses

rr_OtherExpensesOverAssets

0.16%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.60%

1 year

rr_ExpenseExampleYear01

263

3 years

rr_ExpenseExampleYear03

505

5 years

rr_ExpenseExampleYear05

871

10 years

rr_ExpenseExampleYear10

1,900

1 year

rr_ExpenseExampleNoRedemptionYear01

163

3 years

rr_ExpenseExampleNoRedemptionYear03

505

5 years

rr_ExpenseExampleNoRedemptionYear05

871

10 years

rr_ExpenseExampleNoRedemptionYear10

1,900

1 Year

rr_AverageAnnualReturnYear01

3.03%

5 Years

rr_AverageAnnualReturnYear05

6.31%

10 Years

rr_AverageAnnualReturnYear10

4.06%

Since Inception

rr_AverageAnnualReturnSinceInception

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 11, 2002

Retail Class | Transamerica Flexible Income | 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

0.44%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.18%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.62%

1 year

rr_ExpenseExampleYear01

63

3 years

rr_ExpenseExampleYear03

199

5 years

rr_ExpenseExampleYear05

346

10 years

rr_ExpenseExampleYear10

774

1 year

rr_ExpenseExampleNoRedemptionYear01

63

3 years

rr_ExpenseExampleNoRedemptionYear03

199

5 years

rr_ExpenseExampleNoRedemptionYear05

346

10 years

rr_ExpenseExampleNoRedemptionYear10

774

1 Year

rr_AverageAnnualReturnYear01

4.01%

5 Years

rr_AverageAnnualReturnYear05

7.38%

10 Years

rr_AverageAnnualReturnYear10

Since Inception

rr_AverageAnnualReturnSinceInception

7.45%

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 30, 2009

Retail Class | Transamerica Flexible Income | Return after taxes on distributions | A

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.49%

5 Years

rr_AverageAnnualReturnYear05

5.19%

10 Years

rr_AverageAnnualReturnYear10

2.91%

Since Inception

rr_AverageAnnualReturnSinceInception

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 29, 1987

Retail Class | Transamerica Flexible Income | Return after taxes on distributions and sale of fund shares | A

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.12%

5 Years

rr_AverageAnnualReturnYear05

4.73%

10 Years

rr_AverageAnnualReturnYear10

2.92%

Since Inception

rr_AverageAnnualReturnSinceInception

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 29, 1987

Retail Class | Transamerica Flexible Income | Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.97%

5 Years

rr_AverageAnnualReturnYear05

4.45%

10 Years

rr_AverageAnnualReturnYear10

4.71%

Since Inception

rr_AverageAnnualReturnSinceInception