v3.25.2
Shareholder Report
6 Months Ended
Jun. 30, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Transamerica Series Trust
Entity Central Index Key 0000778207
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2025
C000074410  
Shareholder Report [Line Items]  
Fund Name Transamerica Janus Balanced VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$38
0.74%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.74% [1]
AssetsNet $ 880,521,426
Holdings Count | Holding 672
InvestmentCompanyPortfolioTurnover 40.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$880,521,426
Number of Portfolio Holdings
672
Portfolio Turnover Rate
40%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
57.7%
U.S. Government Obligations
10.8
Corporate Debt Securities
10.3
U.S. Government Agency Obligations
8.4
Mortgage-Backed Securities
6.6
Asset-Backed Securities
4.8
Repurchase Agreements
0.7
Loan Assignments
0.7
Other Investment Company
0.2
Net Other Assets (Liabilities)Footnote Reference^
(0.2)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

NVIDIA Corp.
5.4%
Microsoft Corp.
5.2
U.S. Treasury Bonds, 4.63%, 02/15/2055
3.8
Amazon.com, Inc.
2.9
U.S. Treasury Notes, 4.00%, 05/31/2030
2.6
U.S. Treasury Bonds, 5.00%, 05/15/2045
2.6
Alphabet, Inc., Class C
2.3
Apple, Inc.
2.2
Mastercard, Inc., Class A
2.2
Meta Platforms, Inc., Class A
2.1
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000074409  
Shareholder Report [Line Items]  
Fund Name Transamerica Janus Balanced VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$51
0.99%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 51
Expense Ratio, Percent 0.99% [2]
AssetsNet $ 880,521,426
Holdings Count | Holding 672
InvestmentCompanyPortfolioTurnover 40.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$880,521,426
Number of Portfolio Holdings
672
Portfolio Turnover Rate
40%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
57.7%
U.S. Government Obligations
10.8
Corporate Debt Securities
10.3
U.S. Government Agency Obligations
8.4
Mortgage-Backed Securities
6.6
Asset-Backed Securities
4.8
Repurchase Agreements
0.7
Loan Assignments
0.7
Other Investment Company
0.2
Net Other Assets (Liabilities)Footnote Reference^
(0.2)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

NVIDIA Corp.
5.4%
Microsoft Corp.
5.2
U.S. Treasury Bonds, 4.63%, 02/15/2055
3.8
Amazon.com, Inc.
2.9
U.S. Treasury Notes, 4.00%, 05/31/2030
2.6
U.S. Treasury Bonds, 5.00%, 05/15/2045
2.6
Alphabet, Inc., Class C
2.3
Apple, Inc.
2.2
Mastercard, Inc., Class A
2.2
Meta Platforms, Inc., Class A
2.1
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021505  
Shareholder Report [Line Items]  
Fund Name Transamerica Janus Mid-Cap Growth VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$42
0.83%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.83% [3]
AssetsNet $ 915,231,942
Holdings Count | Holding 80
InvestmentCompanyPortfolioTurnover 8.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$915,231,942
Number of Portfolio Holdings
80
Portfolio Turnover Rate
8%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Information Technology
25.9%
 
Industrials
25.3
 
Health Care
13.9
 
Financials
12.9
 
Consumer Discretionary
7.5
 
Utilities
4.6
 
Real Estate
3.0
 
Communication Services
2.9
 
Materials
1.6
 
Consumer Staples
0.6
 
Energy
0.4
Repurchase Agreements
1.4
Other Investment Company
0.0Footnote Reference*
Net Other Assets (Liabilities)Footnote Reference^
0.0Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Constellation Software, Inc.
4.9%
Intact Financial Corp.
3.6
SS&C Technologies Holdings, Inc.
3.4
Flex Ltd.
3.3
Ferguson Enterprises, Inc.
2.7
AppLovin Corp., Class A
2.6
Boston Scientific Corp.
2.6
LPL Financial Holdings, Inc.
2.4
Liberty Media Corp. - Liberty Formula One, Class C
2.4
Teledyne Technologies, Inc.
2.3
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021506  
Shareholder Report [Line Items]  
Fund Name Transamerica Janus Mid-Cap Growth VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$54
1.08%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 54
Expense Ratio, Percent 1.08% [4]
AssetsNet $ 915,231,942
Holdings Count | Holding 80
InvestmentCompanyPortfolioTurnover 8.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$915,231,942
Number of Portfolio Holdings
80
Portfolio Turnover Rate
8%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Information Technology
25.9%
 
Industrials
25.3
 
Health Care
13.9
 
Financials
12.9
 
Consumer Discretionary
7.5
 
Utilities
4.6
 
Real Estate
3.0
 
Communication Services
2.9
 
Materials
1.6
 
Consumer Staples
0.6
 
Energy
0.4
Repurchase Agreements
1.4
Other Investment Company
0.0Footnote Reference*
Net Other Assets (Liabilities)Footnote Reference^
0.0Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Constellation Software, Inc.
4.9%
Intact Financial Corp.
3.6
SS&C Technologies Holdings, Inc.
3.4
Flex Ltd.
3.3
Ferguson Enterprises, Inc.
2.7
AppLovin Corp., Class A
2.6
Boston Scientific Corp.
2.6
LPL Financial Holdings, Inc.
2.4
Liberty Media Corp. - Liberty Formula One, Class C
2.4
Teledyne Technologies, Inc.
2.3
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021503  
Shareholder Report [Line Items]  
Fund Name Transamerica JPMorgan Asset Allocation - Conservative VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$9
0.18%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.18% [5]
AssetsNet $ 736,214,199
Holdings Count | Holding 21
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$736,214,199
Number of Portfolio Holdings
21
Portfolio Turnover Rate
0%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Fixed Income Funds
33.6%
U.S. Equity Funds
28.1
International Mixed Allocation Funds
22.9
International Equity Funds
11.7
U.S. Government Obligation
1.5
International Alternative Fund
1.2
Repurchase Agreements
1.0
Net Other Assets (Liabilities)Footnote Reference^
(0.0)Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Transamerica Aegon Bond VP, Initial Class
22.9%
Transamerica Core Bond, Class I2
17.5
Transamerica WMC US Growth VP, Initial Class
14.0
Transamerica High Yield Bond, Class I2
9.1
Transamerica Large Cap Value, Class I2
8.3
Transamerica Long Credit, Class I2
5.7
Transamerica JPMorgan Enhanced Index VP, Initial Class
5.7
Transamerica International Focus, Class I2
3.6
Transamerica International Equity, Class I2
3.2
Transamerica International Small Cap Value, Class I2
2.7
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021504  
Shareholder Report [Line Items]  
Fund Name Transamerica JPMorgan Asset Allocation - Conservative VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$22
0.43%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.43% [6]
AssetsNet $ 736,214,199
Holdings Count | Holding 21
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$736,214,199
Number of Portfolio Holdings
21
Portfolio Turnover Rate
0%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Fixed Income Funds
33.6%
U.S. Equity Funds
28.1
International Mixed Allocation Funds
22.9
International Equity Funds
11.7
U.S. Government Obligation
1.5
International Alternative Fund
1.2
Repurchase Agreements
1.0
Net Other Assets (Liabilities)Footnote Reference^
(0.0)Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Transamerica Aegon Bond VP, Initial Class
22.9%
Transamerica Core Bond, Class I2
17.5
Transamerica WMC US Growth VP, Initial Class
14.0
Transamerica High Yield Bond, Class I2
9.1
Transamerica Large Cap Value, Class I2
8.3
Transamerica Long Credit, Class I2
5.7
Transamerica JPMorgan Enhanced Index VP, Initial Class
5.7
Transamerica International Focus, Class I2
3.6
Transamerica International Equity, Class I2
3.2
Transamerica International Small Cap Value, Class I2
2.7
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021509  
Shareholder Report [Line Items]  
Fund Name Transamerica JPMorgan Asset Allocation - Growth VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$9
0.17%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.17% [7]
AssetsNet $ 1,082,880,989
Holdings Count | Holding 17
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$1,082,880,989
Number of Portfolio Holdings
17
Portfolio Turnover Rate
0%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Equity Funds
64.8%
International Equity Funds
23.1
U.S. Fixed Income Funds
8.8
U.S. Government Obligation
2.1
Repurchase Agreements
1.2
Net Other Assets (Liabilities)Footnote Reference^
0.0Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Transamerica JPMorgan Enhanced Index VP, Initial Class
36.0%
Transamerica WMC US Growth VP, Initial Class
14.5
Transamerica Large Cap Value, Class I2
10.7
Transamerica International Focus, Class I2
7.9
Transamerica International Equity, Class I2
7.2
Transamerica Aegon High Yield Bond VP, Initial Class
6.2
Transamerica International Small Cap Value, Class I2
5.5
Transamerica Floating Rate, Class I2
2.6
U.S. Treasury Notes, 4.25%, 01/31/2026
2.1
Transamerica BlackRock Real Estate Securities VP, Initial Class
2.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021510  
Shareholder Report [Line Items]  
Fund Name Transamerica JPMorgan Asset Allocation - Growth VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$22
0.42%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.42% [8]
AssetsNet $ 1,082,880,989
Holdings Count | Holding 17
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$1,082,880,989
Number of Portfolio Holdings
17
Portfolio Turnover Rate
0%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Equity Funds
64.8%
International Equity Funds
23.1
U.S. Fixed Income Funds
8.8
U.S. Government Obligation
2.1
Repurchase Agreements
1.2
Net Other Assets (Liabilities)Footnote Reference^
0.0Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Transamerica JPMorgan Enhanced Index VP, Initial Class
36.0%
Transamerica WMC US Growth VP, Initial Class
14.5
Transamerica Large Cap Value, Class I2
10.7
Transamerica International Focus, Class I2
7.9
Transamerica International Equity, Class I2
7.2
Transamerica Aegon High Yield Bond VP, Initial Class
6.2
Transamerica International Small Cap Value, Class I2
5.5
Transamerica Floating Rate, Class I2
2.6
U.S. Treasury Notes, 4.25%, 01/31/2026
2.1
Transamerica BlackRock Real Estate Securities VP, Initial Class
2.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021513  
Shareholder Report [Line Items]  
Fund Name Transamerica JPMorgan Asset Allocation - Moderate Growth VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$9
0.17%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.17% [9]
AssetsNet $ 3,166,319,157
Holdings Count | Holding 22
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$3,166,319,157
Number of Portfolio Holdings
22
Portfolio Turnover Rate
0%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Equity Funds
49.2%
International Equity Funds
19.9
U.S. Fixed Income Funds
17.2
International Mixed Allocation Funds
9.8
U.S. Government Obligation
1.5
International Alternative Funds
1.2
Repurchase Agreements
1.1
Net Other Assets (Liabilities)Footnote Reference^
0.1
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Transamerica JPMorgan Enhanced Index VP, Initial Class
30.7%
Transamerica WMC US Growth VP, Initial Class
10.3
Transamerica Aegon Bond VP, Initial Class
9.8
Transamerica High Yield Bond, Class I2
9.6
Transamerica International Focus, Class I2
6.8
Transamerica Large Cap Value, Class I2
5.7
Transamerica Long Credit, Class I2
5.6
Transamerica International Equity, Class I2
5.5
Transamerica International Small Cap Value, Class I2
5.0
Transamerica BlackRock Real Estate Securities VP, Initial Class
2.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021514  
Shareholder Report [Line Items]  
Fund Name Transamerica JPMorgan Asset Allocation - Moderate Growth VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$21
0.42%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 21
Expense Ratio, Percent 0.42% [10]
AssetsNet $ 3,166,319,157
Holdings Count | Holding 22
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$3,166,319,157
Number of Portfolio Holdings
22
Portfolio Turnover Rate
0%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Equity Funds
49.2%
International Equity Funds
19.9
U.S. Fixed Income Funds
17.2
International Mixed Allocation Funds
9.8
U.S. Government Obligation
1.5
International Alternative Funds
1.2
Repurchase Agreements
1.1
Net Other Assets (Liabilities)Footnote Reference^
0.1
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Transamerica JPMorgan Enhanced Index VP, Initial Class
30.7%
Transamerica WMC US Growth VP, Initial Class
10.3
Transamerica Aegon Bond VP, Initial Class
9.8
Transamerica High Yield Bond, Class I2
9.6
Transamerica International Focus, Class I2
6.8
Transamerica Large Cap Value, Class I2
5.7
Transamerica Long Credit, Class I2
5.6
Transamerica International Equity, Class I2
5.5
Transamerica International Small Cap Value, Class I2
5.0
Transamerica BlackRock Real Estate Securities VP, Initial Class
2.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021511  
Shareholder Report [Line Items]  
Fund Name Transamerica JPMorgan Asset Allocation - Moderate VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$8
0.16%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 8
Expense Ratio, Percent 0.16% [11]
AssetsNet $ 4,668,065,541
Holdings Count | Holding 22
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$4,668,065,541
Number of Portfolio Holdings
22
Portfolio Turnover Rate
0%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Equity Funds
41.1%
U.S. Fixed Income Funds
26.1
International Equity Funds
14.7
International Mixed Allocation Funds
13.9
U.S. Government Obligation
1.8
Repurchase Agreements
1.2
International Alternative Funds
1.2
Net Other Assets (Liabilities)Footnote Reference^
0.0Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Transamerica JPMorgan Enhanced Index VP, Initial Class
20.2%
Transamerica Aegon Bond VP, Initial Class
13.9
Transamerica WMC US Growth VP, Initial Class
12.9
Transamerica High Yield Bond, Class I2
9.7
Transamerica Core Bond, Class I2
9.4
Transamerica Large Cap Value, Class I2
7.4
Transamerica Long Credit, Class I2
5.7
Transamerica International Focus, Class I2
5.0
Transamerica International Small Cap Value, Class I2
3.7
Transamerica International Equity, Class I2
3.7
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021512  
Shareholder Report [Line Items]  
Fund Name Transamerica JPMorgan Asset Allocation - Moderate VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$21
0.41%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 21
Expense Ratio, Percent 0.41% [12]
AssetsNet $ 4,668,065,541
Holdings Count | Holding 22
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$4,668,065,541
Number of Portfolio Holdings
22
Portfolio Turnover Rate
0%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Equity Funds
41.1%
U.S. Fixed Income Funds
26.1
International Equity Funds
14.7
International Mixed Allocation Funds
13.9
U.S. Government Obligation
1.8
Repurchase Agreements
1.2
International Alternative Funds
1.2
Net Other Assets (Liabilities)Footnote Reference^
0.0Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Transamerica JPMorgan Enhanced Index VP, Initial Class
20.2%
Transamerica Aegon Bond VP, Initial Class
13.9
Transamerica WMC US Growth VP, Initial Class
12.9
Transamerica High Yield Bond, Class I2
9.7
Transamerica Core Bond, Class I2
9.4
Transamerica Large Cap Value, Class I2
7.4
Transamerica Long Credit, Class I2
5.7
Transamerica International Focus, Class I2
5.0
Transamerica International Small Cap Value, Class I2
3.7
Transamerica International Equity, Class I2
3.7
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021449  
Shareholder Report [Line Items]  
Fund Name Transamerica JPMorgan Enhanced Index VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$31
0.61%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.61% [13]
AssetsNet $ 3,108,745,418
Holdings Count | Holding 150
InvestmentCompanyPortfolioTurnover 14.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$3,108,745,418
Number of Portfolio Holdings
150
Portfolio Turnover Rate
14%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Information Technology
32.3%
 
Financials
14.3
 
Consumer Discretionary
11.6
 
Communication Services
9.3
 
Health Care
9.2
 
Industrials
8.5
 
Consumer Staples
4.5
 
Energy
2.9
 
Utilities
2.3
 
Materials
1.9
 
Real Estate
1.8
Repurchase Agreements
1.3
Net Other Assets (Liabilities)Footnote Reference^
0.1
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Microsoft Corp.
7.9%
NVIDIA Corp.
7.7
Apple, Inc.
5.6
Amazon.com, Inc.
4.3
Meta Platforms, Inc., Class A
3.6
Broadcom, Inc.
2.4
Alphabet, Inc., Class A
2.0
Mastercard, Inc., Class A
1.7
Tesla, Inc.
1.6
Visa, Inc., Class A
1.6
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021450  
Shareholder Report [Line Items]  
Fund Name Transamerica JPMorgan Enhanced Index VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$44
0.86%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.86% [14]
AssetsNet $ 3,108,745,418
Holdings Count | Holding 150
InvestmentCompanyPortfolioTurnover 14.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$3,108,745,418
Number of Portfolio Holdings
150
Portfolio Turnover Rate
14%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Information Technology
32.3%
 
Financials
14.3
 
Consumer Discretionary
11.6
 
Communication Services
9.3
 
Health Care
9.2
 
Industrials
8.5
 
Consumer Staples
4.5
 
Energy
2.9
 
Utilities
2.3
 
Materials
1.9
 
Real Estate
1.8
Repurchase Agreements
1.3
Net Other Assets (Liabilities)Footnote Reference^
0.1
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Microsoft Corp.
7.9%
NVIDIA Corp.
7.7
Apple, Inc.
5.6
Amazon.com, Inc.
4.3
Meta Platforms, Inc., Class A
3.6
Broadcom, Inc.
2.4
Alphabet, Inc., Class A
2.0
Mastercard, Inc., Class A
1.7
Tesla, Inc.
1.6
Visa, Inc., Class A
1.6
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000034664  
Shareholder Report [Line Items]  
Fund Name Transamerica JPMorgan International Moderate Growth VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$11
0.20%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 11
Expense Ratio, Percent 0.20% [15]
AssetsNet $ 365,555,704
Holdings Count | Holding 15
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$365,555,704
Number of Portfolio Holdings
15
Portfolio Turnover Rate
0%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

International Equity Funds
65.3%
U.S. Fixed Income Funds
17.5
U.S. Equity Funds
7.3
International Mixed Allocation Funds
5.7
U.S. Government Obligation
2.1
International Alternative Funds
1.1
Repurchase Agreements
1.0
Net Other Assets (Liabilities)Footnote Reference^
(0.0)Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Transamerica International Focus, Class I2
24.1%
Transamerica International Equity, Class I2
22.1
Transamerica International Small Cap Value, Class I2
17.0
Transamerica High Yield Bond, Class I2
9.5
Transamerica WMC US Growth VP, Initial Class
7.3
Transamerica Aegon Bond VP, Initial Class
5.7
Transamerica Long Credit, Class I2
5.5
U.S. Treasury Notes, 4.25%, 01/31/2026
2.1
Transamerica BlackRock Real Estate Securities VP, Initial Class
2.0
Transamerica Core Bond, Class I2
1.2
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000034665  
Shareholder Report [Line Items]  
Fund Name Transamerica JPMorgan International Moderate Growth VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$24
0.45%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.45% [16]
AssetsNet $ 365,555,704
Holdings Count | Holding 15
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$365,555,704
Number of Portfolio Holdings
15
Portfolio Turnover Rate
0%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

International Equity Funds
65.3%
U.S. Fixed Income Funds
17.5
U.S. Equity Funds
7.3
International Mixed Allocation Funds
5.7
U.S. Government Obligation
2.1
International Alternative Funds
1.1
Repurchase Agreements
1.0
Net Other Assets (Liabilities)Footnote Reference^
(0.0)Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Transamerica International Focus, Class I2
24.1%
Transamerica International Equity, Class I2
22.1
Transamerica International Small Cap Value, Class I2
17.0
Transamerica High Yield Bond, Class I2
9.5
Transamerica WMC US Growth VP, Initial Class
7.3
Transamerica Aegon Bond VP, Initial Class
5.7
Transamerica Long Credit, Class I2
5.5
U.S. Treasury Notes, 4.25%, 01/31/2026
2.1
Transamerica BlackRock Real Estate Securities VP, Initial Class
2.0
Transamerica Core Bond, Class I2
1.2
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021443  
Shareholder Report [Line Items]  
Fund Name Transamerica JPMorgan Tactical Allocation VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$40
0.79%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.79% [17]
AssetsNet $ 891,651,292
Holdings Count | Holding 1,229
InvestmentCompanyPortfolioTurnover 24.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$891,651,292
Number of Portfolio Holdings
1,229
Portfolio Turnover Rate
24%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
26.3%
U.S. Government Agency Obligations
24.3
Corporate Debt Securities
22.1
U.S. Government Obligations
22.0
Repurchase Agreements
3.0
Asset-Backed Securities
0.8
Mortgage-Backed Securities
0.6
Foreign Government Obligations
0.4
Other Investment Company
0.3
Short-Term U.S. Government Obligations
0.1
Net Other Assets (Liabilities)Footnote Reference^
0.1
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

U.S. Treasury Notes, 1.38%, 10/31/2028
2.9%
U.S. Treasury Notes, 4.13%, 10/31/2029
2.8
U.S. Treasury Notes, 2.63%, 05/31/2027
2.6
U.S. Treasury Notes, 4.13%, 11/30/2029
2.3
U.S. Treasury Notes, 1.13%, 10/31/2026
2.2
Microsoft Corp.
1.3
U.S. Treasury Bonds, Principal Only STRIPS, 08/15/2031
1.2
NVIDIA Corp.
1.1
Government National Mortgage Association, 4.50%, 08/20/2052
0.9
Amazon.com, Inc.
0.9
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021444  
Shareholder Report [Line Items]  
Fund Name Transamerica JPMorgan Tactical Allocation VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$53
1.04%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.04% [18]
AssetsNet $ 891,651,292
Holdings Count | Holding 1,229
InvestmentCompanyPortfolioTurnover 24.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$891,651,292
Number of Portfolio Holdings
1,229
Portfolio Turnover Rate
24%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
26.3%
U.S. Government Agency Obligations
24.3
Corporate Debt Securities
22.1
U.S. Government Obligations
22.0
Repurchase Agreements
3.0
Asset-Backed Securities
0.8
Mortgage-Backed Securities
0.6
Foreign Government Obligations
0.4
Other Investment Company
0.3
Short-Term U.S. Government Obligations
0.1
Net Other Assets (Liabilities)Footnote Reference^
0.1
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

U.S. Treasury Notes, 1.38%, 10/31/2028
2.9%
U.S. Treasury Notes, 4.13%, 10/31/2029
2.8
U.S. Treasury Notes, 2.63%, 05/31/2027
2.6
U.S. Treasury Notes, 4.13%, 11/30/2029
2.3
U.S. Treasury Notes, 1.13%, 10/31/2026
2.2
Microsoft Corp.
1.3
U.S. Treasury Bonds, Principal Only STRIPS, 08/15/2031
1.2
NVIDIA Corp.
1.1
Government National Mortgage Association, 4.50%, 08/20/2052
0.9
Amazon.com, Inc.
0.9
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000099470  
Shareholder Report [Line Items]  
Fund Name Transamerica Madison Diversified Income VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$55
1.09%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 55
Expense Ratio, Percent 1.09% [19]
AssetsNet $ 111,287,233
Holdings Count | Holding 316
InvestmentCompanyPortfolioTurnover 8.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$111,287,233
Number of Portfolio Holdings
316
Portfolio Turnover Rate
8%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
41.2%
U.S. Government Agency Obligations
24.4
Corporate Debt Securities
17.4
U.S. Government Obligations
12.1
Mortgage-Backed Securities
2.9
Repurchase Agreements
0.9
Asset-Backed Securities
0.7
Other Investment Company
0.4
Municipal Government Obligations
0.0Footnote Reference*
Net Other Assets (Liabilities)Footnote Reference^
(0.0)Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

CME Group, Inc.
1.7%
Automatic Data Processing, Inc.
1.7
Blackrock, Inc.
1.6
Morgan Stanley
1.6
Honeywell International, Inc.
1.5
U.S. Treasury Notes, 2.63%, 02/15/2029
1.5
NextEra Energy, Inc.
1.5
Home Depot, Inc.
1.5
Texas Instruments, Inc.
1.5
JPMorgan Chase & Co.
1.4
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000112680  
Shareholder Report [Line Items]  
Fund Name Transamerica Market Participation Strategy VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$49
0.98%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 49
Expense Ratio, Percent 0.98% [20]
AssetsNet $ 288,647,694
Holdings Count | Holding 13
InvestmentCompanyPortfolioTurnover 19.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$288,647,694
Number of Portfolio Holdings
13
Portfolio Turnover Rate
19%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

U.S. Government Obligations
26.7%
Short-Term U.S. Government Obligations
22.1
U.S. Government Agency Obligations
16.4
Other Investment Company
11.8
Foreign Government Obligations
10.6
Repurchase Agreements
6.2
Purchased Options
17.9
Net Other Assets (Liabilities)Footnote Reference^
(11.7)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

U.S. Treasury Notes, 1.63%, 10/31/2026
20.9%
U.S. Treasury Bills, 4.31%, 09/02/2025
12.0
U.S. Treasury Bills, 5.09%, 07/10/2025
10.0
Federal Home Loan Banks, 3.25%, 11/16/2028
9.9
U.S. Treasury Bonds, Principal Only STRIPS, 02/15/2027
5.9
International Bank for Reconstruction & Development, 0.88%, 07/15/2026
5.7
Federal National Mortgage Association, 7.25%, 05/15/2030
4.0
Federal National Mortgage Association, 6.25%, 05/15/2029
2.5
Inter-American Development Bank, 4.00%, 01/12/2028
2.5
European Investment Bank, 3.88%, 03/15/2028
2.4
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021469  
Shareholder Report [Line Items]  
Fund Name Transamerica Morgan Stanley Capital Growth VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$41
0.76%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.76% [21]
AssetsNet $ 184,454,203
Holdings Count | Holding 30
InvestmentCompanyPortfolioTurnover 47.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$184,454,203
Number of Portfolio Holdings
30
Portfolio Turnover Rate
47%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Information Technology
49.2%
 
Consumer Discretionary
17.8
 
Financials
10.5
 
Health Care
6.0
 
Communication Services
5.9
 
Industrials
4.9
Repurchase Agreements
5.8
Other Investment Company
2.6
Options Purchased
0.1
Net Other Assets (Liabilities)Footnote Reference^
(2.8)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Cloudflare, Inc., Class A
13.3%
MicroStrategy, Inc., Class A
6.7
Affirm Holdings, Inc.
6.6
Tesla, Inc.
6.3
ROBLOX Corp., Class A
5.9
AppLovin Corp., Class A
5.4
DoorDash, Inc., Class A
5.0
MercadoLibre, Inc.
4.9
Shopify, Inc., Class A
4.8
Snowflake, Inc., Class A
4.8
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000147921  
Shareholder Report [Line Items]  
Fund Name Transamerica Morgan Stanley Global Allocation Managed Risk - Balanced VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$24
0.47%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.47% [22]
AssetsNet $ 194,402,454
Holdings Count | Holding 2
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$194,402,454
Number of Portfolio Holdings
2
Portfolio Turnover Rate
0%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

International Mixed Allocation Funds
97.5%
Repurchase Agreements
2.7
Net Other Assets (Liabilities)Footnote Reference^
(0.2)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Transamerica Morgan Stanley Global Allocation VP, Initial Class
97.5%
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000076205  
Shareholder Report [Line Items]  
Fund Name Transamerica Morgan Stanley Global Allocation VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$39
0.75%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.75% [23]
AssetsNet $ 922,948,867
Holdings Count | Holding 1,390
InvestmentCompanyPortfolioTurnover 27.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$922,948,867
Number of Portfolio Holdings
1,390
Portfolio Turnover Rate
27%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
45.8%
Foreign Government Obligations
19.0
Corporate Debt Securities
7.9
Short-Term U.S. Government Obligation
7.9
Repurchase Agreements
6.9
U.S. Government Agency Obligations
4.4
U.S. Government Obligations
4.2
Mortgage-Backed Securities
2.4
Asset-Backed Securities
0.2
Other Investment Company
0.2
Municipal Government Obligations
0.1
Preferred Stocks
0.0Footnote Reference*
Warrants
0.0
Convertible Bonds
0.0
Net Other Assets (Liabilities)Footnote Reference^
1.0
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

U.S. Treasury Bills, 4.33%, 08/28/2025
5.5%
NVIDIA Corp.
2.4
Microsoft Corp.
2.2
Apple, Inc.
1.9
U.S. Treasury Bills, 4.31%, 08/05/2025
1.7
Amazon.com, Inc.
1.3
China Government Bonds, 3.27%, 11/19/2030
1.2
Meta Platforms, Inc., Class A
1.0
Federal National Mortgage Association, 3.00%, 01/01/2053
1.0
U.S. Treasury Notes, 1.13%, 10/31/2026
1.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000076206  
Shareholder Report [Line Items]  
Fund Name Transamerica Morgan Stanley Global Allocation VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$52
1.00%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 52
Expense Ratio, Percent 1.00% [24]
AssetsNet $ 922,948,867
Holdings Count | Holding 1,390
InvestmentCompanyPortfolioTurnover 27.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$922,948,867
Number of Portfolio Holdings
1,390
Portfolio Turnover Rate
27%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
45.8%
Foreign Government Obligations
19.0
Corporate Debt Securities
7.9
Short-Term U.S. Government Obligation
7.9
Repurchase Agreements
6.9
U.S. Government Agency Obligations
4.4
U.S. Government Obligations
4.2
Mortgage-Backed Securities
2.4
Asset-Backed Securities
0.2
Other Investment Company
0.2
Municipal Government Obligations
0.1
Preferred Stocks
0.0Footnote Reference*
Warrants
0.0
Convertible Bonds
0.0
Net Other Assets (Liabilities)Footnote Reference^
1.0
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

U.S. Treasury Bills, 4.33%, 08/28/2025
5.5%
NVIDIA Corp.
2.4
Microsoft Corp.
2.2
Apple, Inc.
1.9
U.S. Treasury Bills, 4.31%, 08/05/2025
1.7
Amazon.com, Inc.
1.3
China Government Bonds, 3.27%, 11/19/2030
1.2
Meta Platforms, Inc., Class A
1.0
Federal National Mortgage Association, 3.00%, 01/01/2053
1.0
U.S. Treasury Notes, 1.13%, 10/31/2026
1.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000197833  
Shareholder Report [Line Items]  
Fund Name Transamerica MSCI EAFE Index VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$10
0.18%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 10
Expense Ratio, Percent 0.18% [25]
AssetsNet $ 111,928,403
Holdings Count | Holding 697
InvestmentCompanyPortfolioTurnover 4.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$111,928,403
Number of Portfolio Holdings
697
Portfolio Turnover Rate
4%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Financials
23.3%
 
Industrials
18.7
 
Health Care
11.0
 
Consumer Discretionary
9.4
 
Information Technology
8.3
 
Consumer Staples
7.8
 
Materials
5.5
 
Communication Services
5.3
 
Utilities
3.4
 
Energy
3.1
 
Real Estate
1.9
Repurchase Agreements
1.0
Preferred Stocks
0.3
Net Other Assets (Liabilities)Footnote Reference^
1.0
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.

Top Country Allocation (Percentage of Net Assets)

Japan
21.3%
United Kingdom
13.7
France
10.6
Germany
10.2
Switzerland
9.8
Australia
6.6
Netherlands
4.7
Sweden
3.6
Spain
3.1
Italy
2.9
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

SAP SE
1.7%
ASML Holding NV
1.6
Nestle SA
1.4
Novartis AG
1.2
Roche Holding AG
1.2
Novo Nordisk AS, Class B
1.2
AstraZeneca PLC
1.1
HSBC Holdings PLC
1.1
Shell PLC
1.1
Commonwealth Bank of Australia
1.1
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000182874  
Shareholder Report [Line Items]  
Fund Name Transamerica MSCI EAFE Index VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$23
0.43%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.43% [26]
AssetsNet $ 111,928,403
Holdings Count | Holding 697
InvestmentCompanyPortfolioTurnover 4.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$111,928,403
Number of Portfolio Holdings
697
Portfolio Turnover Rate
4%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Financials
23.3%
 
Industrials
18.7
 
Health Care
11.0
 
Consumer Discretionary
9.4
 
Information Technology
8.3
 
Consumer Staples
7.8
 
Materials
5.5
 
Communication Services
5.3
 
Utilities
3.4
 
Energy
3.1
 
Real Estate
1.9
Repurchase Agreements
1.0
Preferred Stocks
0.3
Net Other Assets (Liabilities)Footnote Reference^
1.0
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.

Top Country Allocation (Percentage of Net Assets)

Japan
21.3%
United Kingdom
13.7
France
10.6
Germany
10.2
Switzerland
9.8
Australia
6.6
Netherlands
4.7
Sweden
3.6
Spain
3.1
Italy
2.9
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

SAP SE
1.7%
ASML Holding NV
1.6
Nestle SA
1.4
Novartis AG
1.2
Roche Holding AG
1.2
Novo Nordisk AS, Class B
1.2
AstraZeneca PLC
1.1
HSBC Holdings PLC
1.1
Shell PLC
1.1
Commonwealth Bank of Australia
1.1
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021483  
Shareholder Report [Line Items]  
Fund Name Transamerica Multi-Managed Balanced VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$33
0.64%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 33
Expense Ratio, Percent 0.64% [27]
AssetsNet $ 1,391,480,218
Holdings Count | Holding 626
InvestmentCompanyPortfolioTurnover 23.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$1,391,480,218
Number of Portfolio Holdings
626
Portfolio Turnover Rate
23%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
60.2%
Corporate Debt Securities
12.1
U.S. Government Obligations
11.5
U.S. Government Agency Obligations
9.7
Commercial Paper
6.9
Mortgage-Backed Securities
2.0
Asset-Backed Securities
1.4
Repurchase Agreements
1.3
Short-Term U.S. Government Obligations
1.0
Foreign Government Obligations
0.3
Other Investment Company
0.1
Municipal Government Obligations
0.0Footnote Reference*
Net Other Assets (Liabilities)Footnote Reference^
(6.5)
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Microsoft Corp.
4.8%
NVIDIA Corp.
4.7
Apple, Inc.
3.5
Amazon.com, Inc.
2.7
Meta Platforms, Inc., Class A
2.2
Uniform Mortgage-Backed Security, TBA, 2.50%, 07/01/2055
1.6
Broadcom, Inc.
1.5
Alphabet, Inc., Class A
1.2
Uniform Mortgage-Backed Security, TBA, 3.00%, 07/01/2054
1.2
Uniform Mortgage-Backed Security, TBA, 5.50%, 07/01/2054
1.1
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021484  
Shareholder Report [Line Items]  
Fund Name Transamerica Multi-Managed Balanced VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$45
0.89%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.89% [28]
AssetsNet $ 1,391,480,218
Holdings Count | Holding 626
InvestmentCompanyPortfolioTurnover 23.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$1,391,480,218
Number of Portfolio Holdings
626
Portfolio Turnover Rate
23%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
60.2%
Corporate Debt Securities
12.1
U.S. Government Obligations
11.5
U.S. Government Agency Obligations
9.7
Commercial Paper
6.9
Mortgage-Backed Securities
2.0
Asset-Backed Securities
1.4
Repurchase Agreements
1.3
Short-Term U.S. Government Obligations
1.0
Foreign Government Obligations
0.3
Other Investment Company
0.1
Municipal Government Obligations
0.0Footnote Reference*
Net Other Assets (Liabilities)Footnote Reference^
(6.5)
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Microsoft Corp.
4.8%
NVIDIA Corp.
4.7
Apple, Inc.
3.5
Amazon.com, Inc.
2.7
Meta Platforms, Inc., Class A
2.2
Uniform Mortgage-Backed Security, TBA, 2.50%, 07/01/2055
1.6
Broadcom, Inc.
1.5
Alphabet, Inc., Class A
1.2
Uniform Mortgage-Backed Security, TBA, 3.00%, 07/01/2054
1.2
Uniform Mortgage-Backed Security, TBA, 5.50%, 07/01/2054
1.1
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000099475  
Shareholder Report [Line Items]  
Fund Name Transamerica PineBridge Inflation Opportunities VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$28
0.56%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 28
Expense Ratio, Percent 0.56% [29]
AssetsNet $ 93,015,864
Holdings Count | Holding 98
InvestmentCompanyPortfolioTurnover 9.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$93,015,864
Number of Portfolio Holdings
98
Portfolio Turnover Rate
9%
Average MaturityFootnote Reference§
7.14 years
DurationFootnote Reference
6.24 years
Footnote Description
Footnote§
Average Maturity is computed by weighting the maturity of each security in the portfolio by the market value of the security, then averaging these weighted figures.
Footnote
Duration is a time measure of a bond’s interest rate sensitivity, based on the weighted average of the time periods over which a bond’s cash flows accrue to the bondholder.
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

U.S. Government Obligations
49.2%
Foreign Government Obligations
35.9
Corporate Debt Securities
14.5
Asset-Backed Securities
0.7
Other Investment Company
0.5
Short-Term Investment Companies
0.3
Net Other Assets (Liabilities)Footnote Reference^
(1.1)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.

Credit Quality (Percentage of Net Assets)Footnote Reference 

U.S. Government and Agency Securities
49.2%
AAA
7.1
AA
10.1
A
11.9
BBB
22.0
NR
0.0Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote
Credit quality represents a percentage of net assets at the end of the reporting period. Ratings BBB or higher are considered investment grade. Not rated securities do not necessarily indicate low credit quality, and may or may not be equivalent of investment grade. The table reflects Standard and Poor’s (“S&P”) ratings; percentages may include investments not rated by S&P but rated by Moody’s, or if unrated by Moody’s, by Fitch ratings, and then included in the closest equivalent S&P rating. Credit ratings are subject to change. The Portfolio itself has not been rated by an independent agency.
Credit Quality Explanation [Text Block] Credit quality represents a percentage of net assets at the end of the reporting period. Ratings BBB or higher are considered investment grade. Not rated securities do not necessarily indicate low credit quality, and may or may not be equivalent of investment grade. The table reflects Standard and Poor’s (“S&P”) ratings; percentages may include investments not rated by S&P but rated by Moody’s, or if unrated by Moody’s, by Fitch ratings, and then included in the closest equivalent S&P rating. Credit ratings are subject to change. The Portfolio itself has not been rated by an independent agency.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Spain Government Inflation-Linked Bonds, 1.00%, 11/30/2030
4.9%
Japan Government CPI-Linked Bonds, 0.10%, 03/10/2026
4.8
Australia Government Bonds, 2.50%, 09/20/2030
4.7
U.S. Treasury Inflation-Protected Indexed Bonds, 1.50%, 02/15/2053
3.5
U.K. Inflation-Linked Gilt, 0.13%, 03/22/2029
3.4
Japan Government CPI-Linked Bonds, 0.10%, 03/10/2028
3.0
U.S. Treasury Inflation-Protected Indexed Bonds, 2.38%, 01/15/2027
3.0
U.S. Treasury Inflation-Protected Indexed Notes, 0.38%, 07/15/2027
2.8
U.S. Treasury Inflation-Protected Indexed Notes, 0.63%, 07/15/2032
2.8
U.S. Treasury Inflation-Protected Indexed Notes, 0.50%, 01/15/2028
2.7
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000099476  
Shareholder Report [Line Items]  
Fund Name Transamerica PineBridge Inflation Opportunities VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$41
0.81%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.81% [30]
AssetsNet $ 93,015,864
Holdings Count | Holding 98
InvestmentCompanyPortfolioTurnover 9.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$93,015,864
Number of Portfolio Holdings
98
Portfolio Turnover Rate
9%
Average MaturityFootnote Reference§
7.14 years
DurationFootnote Reference
6.24 years
Footnote Description
Footnote§
Average Maturity is computed by weighting the maturity of each security in the portfolio by the market value of the security, then averaging these weighted figures.
Footnote
Duration is a time measure of a bond’s interest rate sensitivity, based on the weighted average of the time periods over which a bond’s cash flows accrue to the bondholder.
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

U.S. Government Obligations
49.2%
Foreign Government Obligations
35.9
Corporate Debt Securities
14.5
Asset-Backed Securities
0.7
Other Investment Company
0.5
Short-Term Investment Companies
0.3
Net Other Assets (Liabilities)Footnote Reference^
(1.1)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.

Credit Quality (Percentage of Net Assets)Footnote Reference 

U.S. Government and Agency Securities
49.2%
AAA
7.1
AA
10.1
A
11.9
BBB
22.0
NR
0.0Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote
Credit quality represents a percentage of net assets at the end of the reporting period. Ratings BBB or higher are considered investment grade. Not rated securities do not necessarily indicate low credit quality, and may or may not be equivalent of investment grade. The table reflects Standard and Poor’s (“S&P”) ratings; percentages may include investments not rated by S&P but rated by Moody’s, or if unrated by Moody’s, by Fitch ratings, and then included in the closest equivalent S&P rating. Credit ratings are subject to change. The Portfolio itself has not been rated by an independent agency.
Credit Quality Explanation [Text Block] Credit quality represents a percentage of net assets at the end of the reporting period. Ratings BBB or higher are considered investment grade. Not rated securities do not necessarily indicate low credit quality, and may or may not be equivalent of investment grade. The table reflects Standard and Poor’s (“S&P”) ratings; percentages may include investments not rated by S&P but rated by Moody’s, or if unrated by Moody’s, by Fitch ratings, and then included in the closest equivalent S&P rating. Credit ratings are subject to change. The Portfolio itself has not been rated by an independent agency.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Spain Government Inflation-Linked Bonds, 1.00%, 11/30/2030
4.9%
Japan Government CPI-Linked Bonds, 0.10%, 03/10/2026
4.8
Australia Government Bonds, 2.50%, 09/20/2030
4.7
U.S. Treasury Inflation-Protected Indexed Bonds, 1.50%, 02/15/2053
3.5
U.K. Inflation-Linked Gilt, 0.13%, 03/22/2029
3.4
Japan Government CPI-Linked Bonds, 0.10%, 03/10/2028
3.0
U.S. Treasury Inflation-Protected Indexed Bonds, 2.38%, 01/15/2027
3.0
U.S. Treasury Inflation-Protected Indexed Notes, 0.38%, 07/15/2027
2.8
U.S. Treasury Inflation-Protected Indexed Notes, 0.63%, 07/15/2032
2.8
U.S. Treasury Inflation-Protected Indexed Notes, 0.50%, 01/15/2028
2.7
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000075538  
Shareholder Report [Line Items]  
Fund Name Transamerica ProFund UltraBear VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating ExpensesFootnote Reference*

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$57
1.23%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 57
Expense Ratio, Percent 1.23% [31]
AssetsNet $ 10,869,709
Holdings Count | Holding 6
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$10,869,709
Number of Portfolio Holdings (Including Derivatives)
6
Portfolio Turnover Rate
0%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Short-Term Investment Companies
69.6%
Repurchase Agreements
17.4
Net Other Assets (Liabilities)Footnote Reference^
13.0
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Dreyfus Treasury & Agency Cash Management Fund, 4.19%
17.5%
BlackRock Liquidity Funds T-Fund, 4.20%
17.4
State Street Institutional U.S. Government Money Market Fund, 4.27%
17.4
UBS Select Treasury Preferred Fund, 4.25%
17.3
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000197834  
Shareholder Report [Line Items]  
Fund Name Transamerica S&P 500 Index VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$7
0.13%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 7
Expense Ratio, Percent 0.13% [32]
AssetsNet $ 1,259,699,132
Holdings Count | Holding 505
InvestmentCompanyPortfolioTurnover 2.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$1,259,699,132
Number of Portfolio Holdings
505
Portfolio Turnover Rate
2%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Information Technology
32.9%
 
Financials
14.0
 
Consumer Discretionary
10.3
 
Communication Services
9.7
 
Health Care
9.3
 
Industrials
8.5
 
Consumer Staples
5.5
 
Energy
3.0
 
Utilities
2.3
 
Real Estate
2.0
 
Materials
1.9
Repurchase Agreements
0.6
Net Other Assets (Liabilities)Footnote Reference^
0.0Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

NVIDIA Corp.
7.3%
Microsoft Corp.
7.0
Apple, Inc.
5.8
Amazon.com, Inc.
3.9
Meta Platforms, Inc., Class A
3.0
Broadcom, Inc.
2.5
Alphabet, Inc., Class A
1.9
Berkshire Hathaway, Inc., Class B
1.7
Tesla, Inc.
1.7
Alphabet, Inc., Class C
1.6
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000182875  
Shareholder Report [Line Items]  
Fund Name Transamerica S&P 500 Index VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$19
0.38%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 19
Expense Ratio, Percent 0.38% [33]
AssetsNet $ 1,259,699,132
Holdings Count | Holding 505
InvestmentCompanyPortfolioTurnover 2.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$1,259,699,132
Number of Portfolio Holdings
505
Portfolio Turnover Rate
2%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Information Technology
32.9%
 
Financials
14.0
 
Consumer Discretionary
10.3
 
Communication Services
9.7
 
Health Care
9.3
 
Industrials
8.5
 
Consumer Staples
5.5
 
Energy
3.0
 
Utilities
2.3
 
Real Estate
2.0
 
Materials
1.9
Repurchase Agreements
0.6
Net Other Assets (Liabilities)Footnote Reference^
0.0Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

NVIDIA Corp.
7.3%
Microsoft Corp.
7.0
Apple, Inc.
5.8
Amazon.com, Inc.
3.9
Meta Platforms, Inc., Class A
3.0
Broadcom, Inc.
2.5
Alphabet, Inc., Class A
1.9
Berkshire Hathaway, Inc., Class B
1.7
Tesla, Inc.
1.7
Alphabet, Inc., Class C
1.6
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021495  
Shareholder Report [Line Items]  
Fund Name Transamerica Small/Mid Cap Value VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$40
0.81%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.81% [34]
AssetsNet $ 514,009,888
Holdings Count | Holding 217
InvestmentCompanyPortfolioTurnover 21.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$514,009,888
Number of Portfolio Holdings
217
Portfolio Turnover Rate
21%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Financials
15.6%
 
Industrials
14.7
 
Health Care
13.6
 
Consumer Staples
10.2
 
Information Technology
7.6
 
Communication Services
6.6
 
Materials
6.2
 
Consumer Discretionary
6.2
 
Energy
6.0
 
Utilities
5.6
 
Real Estate
3.8
Repurchase Agreements
3.8
Other Investment Company
0.2
Net Other Assets (Liabilities)Footnote Reference^
(0.1)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

First Citizens BancShares, Inc., Class A
1.8%
Kraft Heinz Co.
1.6
Dominion Energy, Inc.
1.6
Huntington Ingalls Industries, Inc.
1.5
Evergy, Inc.
1.4
Commercial Metals Co.
1.3
Archer-Daniels-Midland Co.
1.3
Zimmer Biomet Holdings, Inc.
1.3
Perrigo Co. PLC
1.2
Molson Coors Beverage Co., Class B
1.2
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021496  
Shareholder Report [Line Items]  
Fund Name Transamerica Small/Mid Cap Value VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$53
1.06%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.06% [35]
AssetsNet $ 514,009,888
Holdings Count | Holding 217
InvestmentCompanyPortfolioTurnover 21.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$514,009,888
Number of Portfolio Holdings
217
Portfolio Turnover Rate
21%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Financials
15.6%
 
Industrials
14.7
 
Health Care
13.6
 
Consumer Staples
10.2
 
Information Technology
7.6
 
Communication Services
6.6
 
Materials
6.2
 
Consumer Discretionary
6.2
 
Energy
6.0
 
Utilities
5.6
 
Real Estate
3.8
Repurchase Agreements
3.8
Other Investment Company
0.2
Net Other Assets (Liabilities)Footnote Reference^
(0.1)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

First Citizens BancShares, Inc., Class A
1.8%
Kraft Heinz Co.
1.6
Dominion Energy, Inc.
1.6
Huntington Ingalls Industries, Inc.
1.5
Evergy, Inc.
1.4
Commercial Metals Co.
1.3
Archer-Daniels-Midland Co.
1.3
Zimmer Biomet Holdings, Inc.
1.3
Perrigo Co. PLC
1.2
Molson Coors Beverage Co., Class B
1.2
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021475  
Shareholder Report [Line Items]  
Fund Name Transamerica T. Rowe Price Small Cap VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$42
0.84%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.84% [36]
AssetsNet $ 626,741,991
Holdings Count | Holding 326
InvestmentCompanyPortfolioTurnover 22.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$626,741,991
Number of Portfolio Holdings
326
Portfolio Turnover Rate
22%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Industrials
23.7%
 
Information Technology
21.6
 
Health Care
20.2
 
Consumer Discretionary
12.9
 
Financials
6.4
 
Materials
4.2
 
Energy
4.1
 
Consumer Staples
2.9
 
Communication Services
2.2
 
Real Estate
1.2
 
Utilities
0.0Footnote Reference*
Other Investment Company
0.9
Repurchase Agreements
0.7
Net Other Assets (Liabilities)Footnote Reference^
(1.0)
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Rambus, Inc.
1.1%
Fabrinet
1.0
Carpenter Technology Corp.
1.0
Planet Fitness, Inc., Class A
0.9
Wingstop, Inc.
0.9
API Group Corp.
0.9
InterDigital, Inc.
0.9
ATI, Inc.
0.9
Ensign Group, Inc.
0.8
SPX Technologies, Inc.
0.8
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021476  
Shareholder Report [Line Items]  
Fund Name Transamerica T. Rowe Price Small Cap VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$54
1.09%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 54
Expense Ratio, Percent 1.09% [37]
AssetsNet $ 626,741,991
Holdings Count | Holding 326
InvestmentCompanyPortfolioTurnover 22.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$626,741,991
Number of Portfolio Holdings
326
Portfolio Turnover Rate
22%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Industrials
23.7%
 
Information Technology
21.6
 
Health Care
20.2
 
Consumer Discretionary
12.9
 
Financials
6.4
 
Materials
4.2
 
Energy
4.1
 
Consumer Staples
2.9
 
Communication Services
2.2
 
Real Estate
1.2
 
Utilities
0.0Footnote Reference*
Other Investment Company
0.9
Repurchase Agreements
0.7
Net Other Assets (Liabilities)Footnote Reference^
(1.0)
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Rambus, Inc.
1.1%
Fabrinet
1.0
Carpenter Technology Corp.
1.0
Planet Fitness, Inc., Class A
0.9
Wingstop, Inc.
0.9
API Group Corp.
0.9
InterDigital, Inc.
0.9
ATI, Inc.
0.9
Ensign Group, Inc.
0.8
SPX Technologies, Inc.
0.8
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021501  
Shareholder Report [Line Items]  
Fund Name Transamerica TSW International Equity VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$47
0.86%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.86% [38]
AssetsNet $ 200,339,603
Holdings Count | Holding 109
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$200,339,603
Number of Portfolio Holdings
109
Portfolio Turnover Rate
12%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Financials
24.7%
 
Industrials
15.6
 
Information Technology
12.2
 
Consumer Discretionary
11.6
 
Health Care
9.5
 
Consumer Staples
9.3
 
Materials
6.6
 
Energy
6.0
 
Utilities
1.8
 
Communication Services
1.3
 
Real Estate
0.4
Repurchase Agreements
3.4
Preferred Stocks
0.7
Other Investment Company
0.0Footnote Reference*
Net Other Assets (Liabilities)Footnote Reference^
(3.1)
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.

Top Country Allocation (Percentage of Net Assets)

Japan
19.5%
United Kingdom
15.5
Germany
13.3
France
12.2
Switzerland
7.3
Ireland
5.1
Netherlands
5.0
Australia
2.9
Hong Kong
2.9
Luxembourg
2.7
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Sony Group Corp.
2.7%
SAP SE
2.3
Roche Holding AG
2.2
Societe Generale SA
2.0
Hitachi Ltd.
2.0
Nestle SA
1.9
Veolia Environnement SA
1.8
Lloyds Banking Group PLC
1.8
Sumitomo Mitsui Financial Group, Inc.
1.7
Siemens AG
1.7
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021502  
Shareholder Report [Line Items]  
Fund Name Transamerica TSW International Equity VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$61
1.11%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 61
Expense Ratio, Percent 1.11% [39]
AssetsNet $ 200,339,603
Holdings Count | Holding 109
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$200,339,603
Number of Portfolio Holdings
109
Portfolio Turnover Rate
12%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Financials
24.7%
 
Industrials
15.6
 
Information Technology
12.2
 
Consumer Discretionary
11.6
 
Health Care
9.5
 
Consumer Staples
9.3
 
Materials
6.6
 
Energy
6.0
 
Utilities
1.8
 
Communication Services
1.3
 
Real Estate
0.4
Repurchase Agreements
3.4
Preferred Stocks
0.7
Other Investment Company
0.0Footnote Reference*
Net Other Assets (Liabilities)Footnote Reference^
(3.1)
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.

Top Country Allocation (Percentage of Net Assets)

Japan
19.5%
United Kingdom
15.5
Germany
13.3
France
12.2
Switzerland
7.3
Ireland
5.1
Netherlands
5.0
Australia
2.9
Hong Kong
2.9
Luxembourg
2.7
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Sony Group Corp.
2.7%
SAP SE
2.3
Roche Holding AG
2.2
Societe Generale SA
2.0
Hitachi Ltd.
2.0
Nestle SA
1.9
Veolia Environnement SA
1.8
Lloyds Banking Group PLC
1.8
Sumitomo Mitsui Financial Group, Inc.
1.7
Siemens AG
1.7
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021451  
Shareholder Report [Line Items]  
Fund Name Transamerica TSW Mid Cap Value Opportunities VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$38
0.76%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.76% [40]
AssetsNet $ 234,291,210
Holdings Count | Holding 66
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$234,291,210
Number of Portfolio Holdings
66
Portfolio Turnover Rate
29%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Health Care
16.3%
 
Consumer Staples
14.9
 
Financials
11.4
 
Industrials
11.2
 
Communication Services
9.6
 
Utilities
8.0
 
Materials
8.0
 
Energy
6.3
 
Information Technology
5.0
 
Consumer Discretionary
2.6
 
Real Estate
1.8
Repurchase Agreements
5.1
Other Investment Company
0.1
Net Other Assets (Liabilities)Footnote Reference^
(0.3)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Huntington Ingalls Industries, Inc.
2.7%
Dominion Energy, Inc.
2.6
Kraft Heinz Co.
2.6
Evergy, Inc.
2.4
Archer-Daniels-Midland Co.
2.2
First Citizens BancShares, Inc., Class A
2.1
Zimmer Biomet Holdings, Inc.
2.0
Conagra Brands, Inc.
2.0
HF Sinclair Corp.
2.0
LKQ Corp.
2.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021452  
Shareholder Report [Line Items]  
Fund Name Transamerica TSW Mid Cap Value Opportunities VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$51
1.01%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 51
Expense Ratio, Percent 1.01% [41]
AssetsNet $ 234,291,210
Holdings Count | Holding 66
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$234,291,210
Number of Portfolio Holdings
66
Portfolio Turnover Rate
29%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Health Care
16.3%
 
Consumer Staples
14.9
 
Financials
11.4
 
Industrials
11.2
 
Communication Services
9.6
 
Utilities
8.0
 
Materials
8.0
 
Energy
6.3
 
Information Technology
5.0
 
Consumer Discretionary
2.6
 
Real Estate
1.8
Repurchase Agreements
5.1
Other Investment Company
0.1
Net Other Assets (Liabilities)Footnote Reference^
(0.3)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Huntington Ingalls Industries, Inc.
2.7%
Dominion Energy, Inc.
2.6
Kraft Heinz Co.
2.6
Evergy, Inc.
2.4
Archer-Daniels-Midland Co.
2.2
First Citizens BancShares, Inc., Class A
2.1
Zimmer Biomet Holdings, Inc.
2.0
Conagra Brands, Inc.
2.0
HF Sinclair Corp.
2.0
LKQ Corp.
2.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021487  
Shareholder Report [Line Items]  
Fund Name Transamerica WMC US Growth VP
Class Name Initial Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$33
0.65%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 33
Expense Ratio, Percent 0.65% [42]
AssetsNet $ 5,749,533,951
Holdings Count | Holding 58
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$5,749,533,951
Number of Portfolio Holdings
58
Portfolio Turnover Rate
17%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Information Technology
48.8%
 
Communication Services
16.4
 
Consumer Discretionary
12.3
 
Financials
7.7
 
Health Care
6.4
 
Industrials
3.7
 
Consumer Staples
2.4
 
Materials
1.0
 
Real Estate
0.8
Repurchase Agreements
0.8
Net Other Assets (Liabilities)Footnote Reference^
(0.3)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

NVIDIA Corp.
10.7%
Microsoft Corp.
8.2
Apple, Inc.
7.4
Broadcom, Inc.
5.6
Amazon.com, Inc.
5.6
Meta Platforms, Inc., Class A
5.6
Alphabet, Inc., Class A
5.1
Mastercard, Inc., Class A
3.1
Eli Lilly & Co.
2.9
Netflix, Inc.
2.8
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021488  
Shareholder Report [Line Items]  
Fund Name Transamerica WMC US Growth VP
Class Name Service Class
Trading Symbol Ticker: N/A
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Portfolio at transamerica.com/annuities/prospectus. You can also request this information by contacting us at 800-851-9777.
Additional Information Phone Number <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">800-851-9777</span>
Additional Information Website transamerica.com/annuities/prospectus
Expenses [Text Block]

What were the Portfolio costs for the period?

Portfolio Overview Operating Expenses

(based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$46
0.90%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.90% [43]
AssetsNet $ 5,749,533,951
Holdings Count | Holding 58
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$5,749,533,951
Number of Portfolio Holdings
58
Portfolio Turnover Rate
17%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Information Technology
48.8%
 
Communication Services
16.4
 
Consumer Discretionary
12.3
 
Financials
7.7
 
Health Care
6.4
 
Industrials
3.7
 
Consumer Staples
2.4
 
Materials
1.0
 
Real Estate
0.8
Repurchase Agreements
0.8
Net Other Assets (Liabilities)Footnote Reference^
(0.3)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

NVIDIA Corp.
10.7%
Microsoft Corp.
8.2
Apple, Inc.
7.4
Broadcom, Inc.
5.6
Amazon.com, Inc.
5.6
Meta Platforms, Inc., Class A
5.6
Alphabet, Inc., Class A
5.1
Mastercard, Inc., Class A
3.1
Eli Lilly & Co.
2.9
Netflix, Inc.
2.8
Updated Prospectus Web Address transamerica.com/annuities/prospectus
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