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

Class I2 | Transamerica Money Market

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

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TRANSAMERICA MONEY MARKET

Objective [Heading]

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Investment Objective:

Objective, Primary [Text Block]

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Seeks maximum current income from money market securities consistent with liquidity and preservation of principal.

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.

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

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

March 1, 2016

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. 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:

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 the fund’s assets in high quality, U.S. dollar-denominated short-term money market instruments. These instruments include:

• short-term U.S. government obligations, corporate bonds and notes, bank obligations (such as certificates of deposit and bankers' acceptances), commercial paper, asset-backed securities and repurchase agreements

• obligations issued or guaranteed by the U.S. and foreign governments and their agencies and instrumentalities

• obligations of U.S. and foreign banks, or their foreign branches, and U.S. savings banks

The fund may invest without limit in obligations of U.S. banks.

Bank obligations purchased for the fund are limited to U.S. or foreign banks with total assets of $1.5 billion or more. Similarly, savings association obligations purchased for the fund are limited to U.S. savings association obligations issued by U.S. savings banks with total assets of $1.5 billion or more. Foreign securities purchased for the fund must be U.S. dollar-denominated and issued by foreign governments, agencies or instrumentalities, or banks that meet the minimum $1.5 billion total asset requirement. These foreign obligations must also meet the same quality requirements as U.S. obligations.

The fund will enter into repurchase agreements only with financial institutions that the sub-adviser determines are creditworthy. A financial institution must furnish collateral to the fund at least equal in value to the amount of its repurchase obligation. This collateral generally consists of U.S. government securities, but may also consist of non-U.S. government securities including securities that could not be held by the fund without the seller’s repurchase commitment. When the fund enters into a repurchase agreement with collateral that it could not otherwise hold, the fund takes on additional credit and other risks. The sub-adviser is responsible for ensuring that each repurchase agreement is eligible for purchase by the fund.

As a money market fund, the fund tries to maintain a share price of $1.00, and must follow strict rules as to the credit quality, diversification, liquidity and maturity of its investments. Each security, at the time of purchase by the fund, has been determined by the sub-adviser to present minimal credit risk. Where required by these rules, the fund’s sub-adviser or Board of Trustees will decide whether the security should be held or sold in the event of credit downgrades or certain other events occurring after purchase.

Risk [Heading]

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Principal Risks:

Risk Narrative [Text Block]

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An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

In addition, you should be aware that there have been a very small number of money market funds in other fund complexes that, in the past, have failed to pay investors $1.00 per share for their investment in those funds (this is referred to as “breaking the buck”), and any money market fund may do so in the future. If a money market fund breaks the buck or if money market funds are perceived to be likely to do so, there could be significant redemptions from money market funds, driving market prices of securities down and making it more difficult for the fund to maintain a $1.00 per share net asset value. You should also be aware that TAM and its affiliates are under no obligation to provide financial support to the fund or take other measures to ensure that you receive $1.00 per share for your investment in the fund. You should not invest in the fund with the expectation that any such action will be taken.

There is no assurance that the fund will meet its investment objective. The fund could underperform short-term debt instruments or other money market funds, or you could lose money, as a result of risks (in alphabetical order) such as:

• Banking Industry – The fund may invest a significant portion of its assets in obligations that are issued or backed by U.S. and non-U.S. banks and other financial services companies, and thus will be more susceptible to negative events affecting the worldwide financial services sector. Banks are sensitive to changes in money market and general economic conditions. Banks are highly regulated. Decisions by regulators may limit the loans banks make and the interest rates and fees they charge, and may reduce bank profitability.

• Credit – 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 may default or its credit may be downgraded, or the value of assets underlying a security may decline.

• 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.

• 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.

• Interest Rate – The interest rates on short-term obligations held in the fund will vary, rising or falling with short-term interest rates generally. Interest rates in the United States have recently been at historically low levels. The fund's yield will tend to lag behind general changes in interest rates. The ability of the fund's yield to reflect current market rates will depend on how quickly the obligations in its portfolio mature and how much money is available for investment at current market rates.

• 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 sub-adviser to the fund actively manages the fund's investments. Consequently, the fund is subject to the risk that the methods and analyses employed by the sub-adviser may not produce the desired results.

• Market – A change in interest rates or a decline in the market value of a fund investment, lack of liquidity in the bond markets, real or perceived adverse economic or political conditions, inflation, or other market events could cause the value of your investment in the fund, or its yield, to decline. Financial markets in the United States, 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. 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 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.

• Money Market Fund Reform – New requirements for money market funds will take effect over the course of 2015 and 2016. The new regulations will impact funds differently depending upon the types of investors that will be permitted to invest in a fund, and the types of securities in which a fund may invest. "Retail" money market funds will generally limit their beneficial owners to natural persons. All other money market funds will be considered to be "institutional" money market funds. "Prime" money market funds will be permitted to invest primarily in corporate or other non-government securities, "U.S. government" money market funds will be required to invest a very high percentage of their assets in U.S. government securities and "municipal" money market funds will be required to invest significantly in municipal securities. Under the new requirements, institutional prime money market funds and institutional municipal money market funds will be required to sell and redeem shares at prices based on their market value (a floating net asset value). Retail money market funds and institutional U.S. government money market funds will not be subject to the floating net asset value requirement. The new rules will also permit or require both retail and institutional money market funds to impose liquidity fees and suspend redemptions temporarily in certain circumstances. As a result, money market funds will be required to implement changes that will impact and may adversely affect the funds and their investors.

• Portfolio Selection – The sub-adviser's judgment about the quality, relative yield or value of, or market trends affecting, a particular security or sector, or about interest rates, may be incorrect.

• Redemption – The fund may experience periods of heavy redemptions that could cause the fund to liquidate its assets at inopportune times or at a loss or depressed value, and that could affect the fund's ability to maintain a $1.00 share price. Redemption risk is greater to the extent that the fund has investors with large shareholdings, short investment horizons, or unpredictable cash flow needs. The redemption by one or more large shareholders of their holdings in the fund could have an adverse impact on the remaining shareholders in the fund. In addition, the fund may suspend redemptions when permitted by applicable regulations.

• Repurchase Agreements – If the other party to a repurchase agreement defaults on its obligation, the fund may suffer delays and incur costs or lose money in exercising its rights under the agreement. If the seller fails to repurchase the security and the market value declines, the fund could lose money. If the seller becomes insolvent and subject to liquidation or reorganization under applicable bankruptcy or other laws, the fund's ability to dispose of the underlying securities may be restricted.

• 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.

• Yield – The amount of income received by the fund will go up or down depending on day-to-day variations in short-term interest rates, and when interest rates are very low the fund's expenses could absorb all or a significant portion of the fund's income. If interest rates increase, the fund's yield may not increase proportionately. For example, TAM or its affiliates may discontinue any temporary voluntary fee limitation or recoup amounts previously waived or reimbursed. In addition, the recent adoption of more stringent regulations governing the management of money market funds could have a negative effect on yields.

Risk Lose Money [Text]

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Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

Risk Money Market Fund [Text]

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An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

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An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency.

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 the fund’s average annual total returns for different periods.Absent any limitation of the fund’s expenses, total returns would be lower.

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 the fund’s average annual total returns for different periods.

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 I2

Bar Chart Closing [Text Block]

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	Quarter Ended	Return
Best Quarter:	6/30/2006	1.51%
Worst Quarter:	6/30/2013	0.00%

Performance Table Heading

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

Performance Table Not Relevant to Tax Deferred

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Actual returns may depend on the investor’s individual tax situation and may differ from those shown.

Performance Table Narrative

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Actual returns may depend on the investor’s individual tax situation and may differ from those shown.

Call customer service (1-888-233-4339) for the current 7-day yield.

Money Market Seven Day Yield Phone

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1-888-233-4339

Class I2 | Transamerica Money Market | I2

Risk/Return:

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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)

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none

Management fees

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0.40%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.13%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.53%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.05%

^[1]

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

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0.48%

1 year

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49

3 years

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165

5 years

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291

10 years

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660

2006

rr_AnnualReturn2006

4.68%

2007

rr_AnnualReturn2007

4.89%

2008

rr_AnnualReturn2008

2.32%

2009

rr_AnnualReturn2009

0.12%

2010

rr_AnnualReturn2010

0.02%

2011

rr_AnnualReturn2011

0.02%

2012

rr_AnnualReturn2012

0.04%

2013

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0.04%

2014

rr_AnnualReturn2014

0.02%

Highest Quarterly Return, Label

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Best Quarter:

Highest Quarterly Return, Date

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Jun. 30, 2006

Highest Quarterly Return

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1.51%

Lowest Quarterly Return, Label

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Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Jun. 30, 2013

Lowest Quarterly Return

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0.00%

1 Year

rr_AverageAnnualReturnYear01

0.02%

5 Years

rr_AverageAnnualReturnYear05

0.03%

Since Inception

rr_AverageAnnualReturnSinceInception

1.36%

Inception Date

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Nov. 15, 2005

7-DAY YIELD (as of December 31, 2014)

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0.01%

Class I2 | Transamerica Money Market | Return after taxes on distributions | I2

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.01%

5 Years

rr_AverageAnnualReturnYear05

0.02%

Since Inception

rr_AverageAnnualReturnSinceInception

0.88%

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 15, 2005

Class I2 | Transamerica Money Market | Return after taxes on distributions and sale of fund shares | I2

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.01%

5 Years

rr_AverageAnnualReturnYear05

0.02%

Since Inception

rr_AverageAnnualReturnSinceInception

0.88%

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 15, 2005

[1] 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 0.48%, 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.