Transamerica Government Money Market Investment Strategy - Retail Class [Member] - Transamerica Government Money Market	Oct. 31, 2025
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0%;">Principal Investment Strategies:</span>
Strategy Narrative [Text Block]	The fund is a government money market fund. The fund seeks to maintain a stable net asset value of $1.00 per share by investing in: •high-quality, U.S. dollar-denominated short-term money market securities issued or guaranteed as to principal or interest by the U.S. government or its agencies or instrumentalities; •repurchase agreements that are fully collateralized by U.S. government securities or cash; and •cash. The fund's sub-adviser, BlackRock Investment Management, LLC (the “sub-adviser”), invests at least 99.5% of the fund's total assets (plus the amount of borrowings, if any, for investment purposes) in cash, U.S. Treasury bills, notes and other obligations issued or guaranteed as to principal and interest by the U.S. Government, its agencies or instrumentalities, and repurchase agreements fully collateralized by such obligations or cash. Under normal circumstances, the fund invests at least 80% of its net assets (plus the amount of borrowings, if any, for investment purposes) in U.S. Treasury bills, notes and other obligations issued or guaranteed as to principal and interest by the U.S. Government, its agencies or instrumentalities, and repurchase agreements fully collateralized by such 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 must consist of U.S. government securities or cash. The sub-adviser is responsible for ensuring that each repurchase agreement is eligible for purchase by the fund. The fund invests in accordance with the quality, maturity, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940 and other rules of the Securities and Exchange Commission. The fund may invest in variable and floating rate instruments, and transact in securities on a when-issued, delayed delivery or forward commitment basis. The fund may invest in other government money market funds to the extent permitted by law. If the fund takes a temporary defensive position, it will be more difficult for the fund to achieve its investment objective. Although the sub-adviser has the ability to take temporary defensive positions, it may choose not to do so for a variety of reasons, including during volatile market conditions.

Transamerica Government Money Market Investment Strategy - Retail Class [Member] - Transamerica Government Money Market

Oct. 31, 2025

<span style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0%;">Principal Investment Strategies:</span>

Strategy Narrative [Text Block]

The fund is a government money market fund. The fund seeks to maintain a stable net asset value of $1.00 per share by investing in: •high-quality, U.S. dollar-denominated short-term money market securities issued or guaranteed as to principal or interest by the U.S. government or its agencies or instrumentalities; •repurchase agreements that are fully collateralized by U.S. government securities or cash; and •cash. The fund's sub-adviser, BlackRock Investment Management, LLC (the “sub-adviser”), invests at least 99.5% of the fund's total assets (plus the amount of borrowings, if any, for investment purposes) in cash, U.S. Treasury bills, notes and other obligations issued or guaranteed as to principal and interest by the U.S. Government, its agencies or instrumentalities, and repurchase agreements fully collateralized by such obligations or cash. Under normal circumstances, the fund invests at least 80% of its net assets (plus the amount of borrowings, if any, for investment purposes) in U.S. Treasury bills, notes and other obligations issued or guaranteed as to principal and interest by the U.S. Government, its agencies or instrumentalities, and repurchase agreements fully collateralized by such 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 must consist of U.S. government securities or cash. The sub-adviser is responsible for ensuring that each repurchase agreement is eligible for purchase by the fund. The fund invests in accordance with the quality, maturity, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940 and other rules of the Securities and Exchange Commission. The fund may invest in variable and floating rate instruments, and transact in securities on a when-issued, delayed delivery or forward commitment basis. The fund may invest in other government money market funds to the extent permitted by law. If the fund takes a temporary defensive position, it will be more difficult for the fund to achieve its investment objective. Although the sub-adviser has the ability to take temporary defensive positions, it may choose not to do so for a variety of reasons, including during volatile market conditions.