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
C000197832  
Shareholder Report [Line Items]  
Fund Name Transamerica 60/40 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
$23
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 $ 23
Expense Ratio, Percent 0.45% [1]
AssetsNet $ 81,168,223
Holdings Count | Holding 4
InvestmentCompanyPortfolioTurnover 9.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$81,168,223
Number of Portfolio Holdings
4
Portfolio Turnover Rate
9%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Equity Funds
45.6%
U.S. Fixed Income Funds
39.5
International Equity Funds
15.0
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 S&P 500 Index VP, Initial Class
45.6%
Transamerica Short-Term Bond, Class I2
19.8
Transamerica Core Bond, Class I2
19.7
Transamerica MSCI EAFE Index VP, Initial Class
15.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021467  
Shareholder Report [Line Items]  
Fund Name Transamerica Aegon Bond 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
$27
0.53%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 27
Expense Ratio, Percent 0.53% [2]
AssetsNet $ 1,730,293,580
Holdings Count | Holding 494
InvestmentCompanyPortfolioTurnover 24.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$1,730,293,580
Number of Portfolio Holdings
494
Portfolio Turnover Rate
24%
Average MaturityFootnote Reference§
8.20 years
DurationFootnote Reference
5.88 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)

Corporate Debt Securities
43.1%
U.S. Government Obligations
23.1
Asset-Backed Securities
11.4
Mortgage-Backed Securities
10.6
U.S. Government Agency Obligations
9.0
Commercial Paper
5.2
Repurchase Agreements
1.0
Foreign Government Obligations
0.9
Other Investment Company
0.4
Loan Assignments
0.1
Net Other Assets (Liabilities)Footnote Reference^
(4.8)
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.

Credit Quality (Percentage of Net Assets)Footnote Reference 

U.S. Government and Agency Securities
32.1%
AAA
16.5
AA
1.7
A
12.3
BBB
23.3
BB
9.1
B
2.2
CCC
0.4
Below CCC
0.1
NR (Not Rated)
0.5
Footnote Description
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)

U.S. Treasury Bonds, 2.38%, 02/15/2042
2.4%
Uniform Mortgage-Backed Security, TBA, 2.00%, 07/01/2054
2.1
U.S. Treasury Bonds, 3.88%, 05/15/2043
1.5
U.S. Treasury Notes, 4.63%, 02/15/2035
1.5
Uniform Mortgage-Backed Security, TBA, 2.50%, 07/01/2055
1.1
MUFG Securities Canada Ltd, 4.54%, 09/18/2025
1.1
U.S. Treasury Bonds, 3.50%, 02/15/2039
1.1
U.S. Treasury Bonds, 1.25%, 05/15/2050
1.1
Emerson Electric Co, 4.46%, 09/23/2025
1.0
U.S. Treasury Bonds, 2.75%, 08/15/2042
1.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021468  
Shareholder Report [Line Items]  
Fund Name Transamerica Aegon Bond 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
$39
0.78%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.78% [3]
AssetsNet $ 1,730,293,580
Holdings Count | Holding 494
InvestmentCompanyPortfolioTurnover 24.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$1,730,293,580
Number of Portfolio Holdings
494
Portfolio Turnover Rate
24%
Average MaturityFootnote Reference§
8.20 years
DurationFootnote Reference
5.88 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)

Corporate Debt Securities
43.1%
U.S. Government Obligations
23.1
Asset-Backed Securities
11.4
Mortgage-Backed Securities
10.6
U.S. Government Agency Obligations
9.0
Commercial Paper
5.2
Repurchase Agreements
1.0
Foreign Government Obligations
0.9
Other Investment Company
0.4
Loan Assignments
0.1
Net Other Assets (Liabilities)Footnote Reference^
(4.8)
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.

Credit Quality (Percentage of Net Assets)Footnote Reference 

U.S. Government and Agency Securities
32.1%
AAA
16.5
AA
1.7
A
12.3
BBB
23.3
BB
9.1
B
2.2
CCC
0.4
Below CCC
0.1
NR (Not Rated)
0.5
Footnote Description
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)

U.S. Treasury Bonds, 2.38%, 02/15/2042
2.4%
Uniform Mortgage-Backed Security, TBA, 2.00%, 07/01/2054
2.1
U.S. Treasury Bonds, 3.88%, 05/15/2043
1.5
U.S. Treasury Notes, 4.63%, 02/15/2035
1.5
Uniform Mortgage-Backed Security, TBA, 2.50%, 07/01/2055
1.1
MUFG Securities Canada Ltd, 4.54%, 09/18/2025
1.1
U.S. Treasury Bonds, 3.50%, 02/15/2039
1.1
U.S. Treasury Bonds, 1.25%, 05/15/2050
1.1
Emerson Electric Co, 4.46%, 09/23/2025
1.0
U.S. Treasury Bonds, 2.75%, 08/15/2042
1.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021437  
Shareholder Report [Line Items]  
Fund Name Transamerica Aegon Core Bond 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
$25
0.50%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.50% [4]
AssetsNet $ 396,005,465
Holdings Count | Holding 659
InvestmentCompanyPortfolioTurnover 41.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$396,005,465
Number of Portfolio Holdings
659
Portfolio Turnover Rate
41%
Average MaturityFootnote Reference§
8.24 years
DurationFootnote Reference
5.85 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)

Corporate Debt Securities
30.1%
U.S. Government Obligations
29.7
U.S. Government Agency Obligations
23.7
Commercial Paper
14.7
Mortgage-Backed Securities
5.6
Asset-Backed Securities
3.7
Repurchase Agreements
2.6
Short-Term U.S. Government Obligations
1.9
Foreign Government Obligations
0.7
Other Investment Company
0.1
Net Other Assets (Liabilities)Footnote Reference^
(12.8)
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.

Credit Quality (Percentage of Net Assets)Footnote Reference 

U.S. Government and Agency Securities
53.4%
AAA
8.1
AA
0.9
A
9.6
BBB
18.3
BB
2.7
B
0.0Footnote Reference*
CCC
0.0Footnote Reference*
Below CCC
0.0Footnote Reference*
NR (Not Rated)
0.5
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)

Uniform Mortgage-Backed Security, TBA, 2.50%, 07/01/2055
3.4%
Uniform Mortgage-Backed Security, TBA, 5.50%, 07/01/2054
2.4
Uniform Mortgage-Backed Security, TBA, 3.00%, 07/01/2054
2.3
U.S. Treasury Notes, 1.50%, 02/15/2030
2.1
U.S. Treasury Bills, 4.19%, 10/16/2025
1.5
Uniform Mortgage-Backed Security, TBA, 4.50%, 07/01/2054
1.4
Uniform Mortgage-Backed Security, TBA, 4.00%, 07/01/2054
1.4
U.S. Treasury Notes, 4.13%, 11/15/2032
1.3
Uniform Mortgage-Backed Security, TBA, 5.00%, 07/01/2054
1.1
Macquarie Bank Ltd., 4.53%, 08/19/2025
1.1
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021438  
Shareholder Report [Line Items]  
Fund Name Transamerica Aegon Core Bond 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
$38
0.75%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.75% [5]
AssetsNet $ 396,005,465
Holdings Count | Holding 659
InvestmentCompanyPortfolioTurnover 41.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$396,005,465
Number of Portfolio Holdings
659
Portfolio Turnover Rate
41%
Average MaturityFootnote Reference§
8.24 years
DurationFootnote Reference
5.85 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)

Corporate Debt Securities
30.1%
U.S. Government Obligations
29.7
U.S. Government Agency Obligations
23.7
Commercial Paper
14.7
Mortgage-Backed Securities
5.6
Asset-Backed Securities
3.7
Repurchase Agreements
2.6
Short-Term U.S. Government Obligations
1.9
Foreign Government Obligations
0.7
Other Investment Company
0.1
Net Other Assets (Liabilities)Footnote Reference^
(12.8)
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.

Credit Quality (Percentage of Net Assets)Footnote Reference 

U.S. Government and Agency Securities
53.4%
AAA
8.1
AA
0.9
A
9.6
BBB
18.3
BB
2.7
B
0.0Footnote Reference*
CCC
0.0Footnote Reference*
Below CCC
0.0Footnote Reference*
NR (Not Rated)
0.5
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)

Uniform Mortgage-Backed Security, TBA, 2.50%, 07/01/2055
3.4%
Uniform Mortgage-Backed Security, TBA, 5.50%, 07/01/2054
2.4
Uniform Mortgage-Backed Security, TBA, 3.00%, 07/01/2054
2.3
U.S. Treasury Notes, 1.50%, 02/15/2030
2.1
U.S. Treasury Bills, 4.19%, 10/16/2025
1.5
Uniform Mortgage-Backed Security, TBA, 4.50%, 07/01/2054
1.4
Uniform Mortgage-Backed Security, TBA, 4.00%, 07/01/2054
1.4
U.S. Treasury Notes, 4.13%, 11/15/2032
1.3
Uniform Mortgage-Backed Security, TBA, 5.00%, 07/01/2054
1.1
Macquarie Bank Ltd., 4.53%, 08/19/2025
1.1
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021463  
Shareholder Report [Line Items]  
Fund Name Transamerica Aegon High Yield Bond 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
$32
0.63%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.63% [6]
AssetsNet $ 247,016,620
Holdings Count | Holding 423
InvestmentCompanyPortfolioTurnover 16.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$247,016,620
Number of Portfolio Holdings
423
Portfolio Turnover Rate
16%
Average MaturityFootnote Reference§
4.36 years
DurationFootnote Reference
2.79 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)

Corporate Debt Securities
94.9%
Other Investment Company
9.0
Loan Assignments
2.9
Repurchase Agreements
0.5
Common Stocks
0.2
Net Other Assets (Liabilities)Footnote Reference^
(7.5)
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 

BBB
8.2%
BB
51.3
B
30.8
CCC
7.0
Below CCC
0.1
NR (Not Rated)
0.5
Footnote Description
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)

Smyrna Ready Mix Concrete LLC, 8.88%, 11/15/2031
1.1%
Constellation Insurance, Inc., 6.80%, 01/24/2030
0.8
VZ Secured Financing BV, 5.00%, 01/15/2032
0.8
ILFC E-Capital Trust I, 3-Month Term SOFR + 0.00%, 6.43%, 12/21/2065
0.7
EMRLD Borrower LP/Emerald Co-Issuer, Inc., 6.63%, 12/15/2030
0.6
Constellium SE, 5.63%, 06/15/2028
0.6
Charter Communications Operating LLC/Charter Communications Operating Capital, 6.48%, 10/23/2045
0.6
Big River Steel LLC/BRS Finance Corp., 6.63%, 01/31/2029
0.6
Allied Universal Holdco LLC, 7.88%, 02/15/2031
0.6
Herc Holdings, Inc., 5.50%, 07/15/2027
0.6
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021464  
Shareholder Report [Line Items]  
Fund Name Transamerica Aegon High Yield Bond 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
0.88%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.88% [7]
AssetsNet $ 247,016,620
Holdings Count | Holding 423
InvestmentCompanyPortfolioTurnover 16.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$247,016,620
Number of Portfolio Holdings
423
Portfolio Turnover Rate
16%
Average MaturityFootnote Reference§
4.36 years
DurationFootnote Reference
2.79 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)

Corporate Debt Securities
94.9%
Other Investment Company
9.0
Loan Assignments
2.9
Repurchase Agreements
0.5
Common Stocks
0.2
Net Other Assets (Liabilities)Footnote Reference^
(7.5)
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 

BBB
8.2%
BB
51.3
B
30.8
CCC
7.0
Below CCC
0.1
NR (Not Rated)
0.5
Footnote Description
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)

Smyrna Ready Mix Concrete LLC, 8.88%, 11/15/2031
1.1%
Constellation Insurance, Inc., 6.80%, 01/24/2030
0.8
VZ Secured Financing BV, 5.00%, 01/15/2032
0.8
ILFC E-Capital Trust I, 3-Month Term SOFR + 0.00%, 6.43%, 12/21/2065
0.7
EMRLD Borrower LP/Emerald Co-Issuer, Inc., 6.63%, 12/15/2030
0.6
Constellium SE, 5.63%, 06/15/2028
0.6
Charter Communications Operating LLC/Charter Communications Operating Capital, 6.48%, 10/23/2045
0.6
Big River Steel LLC/BRS Finance Corp., 6.63%, 01/31/2029
0.6
Allied Universal Holdco LLC, 7.88%, 02/15/2031
0.6
Herc Holdings, Inc., 5.50%, 07/15/2027
0.6
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021461  
Shareholder Report [Line Items]  
Fund Name Transamerica Aegon Sustainable Equity Income 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
$37
0.72%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.72% [8]
AssetsNet $ 483,978,409
Holdings Count | Holding 48
InvestmentCompanyPortfolioTurnover 5.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$483,978,409
Number of Portfolio Holdings
48
Portfolio Turnover Rate
5%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Financials
22.6%
 
Industrials
20.0
 
Information Technology
18.5
 
Health Care
13.4
 
Consumer Staples
6.7
 
Materials
5.1
 
Real Estate
3.9
 
Consumer Discretionary
3.8
 
Communication Services
2.5
 
Energy
1.4
 
Utilities
1.1
Repurchase Agreements
0.8
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)

Cisco Systems, Inc.
4.5%
CME Group, Inc.
3.8
Gilead Sciences, Inc.
3.7
Bank of America Corp.
3.6
Broadcom, Inc.
3.5
Colgate-Palmolive Co.
3.4
Texas Instruments, Inc.
3.4
Morgan Stanley
3.3
MetLife, Inc.
3.2
Republic Services, Inc.
3.1
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021462  
Shareholder Report [Line Items]  
Fund Name Transamerica Aegon Sustainable Equity 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
$50
0.97%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 50
Expense Ratio, Percent 0.97% [9]
AssetsNet $ 483,978,409
Holdings Count | Holding 48
InvestmentCompanyPortfolioTurnover 5.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$483,978,409
Number of Portfolio Holdings
48
Portfolio Turnover Rate
5%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Financials
22.6%
 
Industrials
20.0
 
Information Technology
18.5
 
Health Care
13.4
 
Consumer Staples
6.7
 
Materials
5.1
 
Real Estate
3.9
 
Consumer Discretionary
3.8
 
Communication Services
2.5
 
Energy
1.4
 
Utilities
1.1
Repurchase Agreements
0.8
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)

Cisco Systems, Inc.
4.5%
CME Group, Inc.
3.8
Gilead Sciences, Inc.
3.7
Bank of America Corp.
3.6
Broadcom, Inc.
3.5
Colgate-Palmolive Co.
3.4
Texas Instruments, Inc.
3.4
Morgan Stanley
3.3
MetLife, Inc.
3.2
Republic Services, Inc.
3.1
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021497  
Shareholder Report [Line Items]  
Fund Name Transamerica Aegon U.S. Government Securities 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
$28
0.56%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 28
Expense Ratio, Percent 0.56% [10]
AssetsNet $ 215,500,009
Holdings Count | Holding 115
InvestmentCompanyPortfolioTurnover 58.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$215,500,009
Number of Portfolio Holdings
115
Portfolio Turnover Rate
58%
Average MaturityFootnote Reference§
7.41 years
DurationFootnote Reference
5.70 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
55.8%
U.S. Government Agency Obligations
34.3
Repurchase Agreements
6.3
Other Investment Company
5.7
Corporate Debt Securities
3.1
Asset-Backed Securities
2.1
Foreign Government Obligations
1.2
Mortgage-Backed Securities
0.9
Municipal Government Obligations
0.1
Net Other Assets (Liabilities)Footnote Reference^
(9.5)
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
90.1%
AAA
4.2
AA
0.3
A
2.4
BBB
0.5
Footnote Description
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)

Federal Farm Credit Banks Funding Corp., 2.04%, 09/24/2029
4.3%
U.S. Treasury Notes, 3.88%, 03/15/2028
3.7
Uniform Mortgage-Backed Security, TBA, 3.50%, 07/01/2039
3.4
Federal National Mortgage Association, 0.88%, 08/05/2030
3.3
Tennessee Valley Authority, 5.25%, 02/01/2055
2.7
Tennessee Valley Authority, 4.88%, 01/15/2048
2.6
Federal Home Loan Banks, 4.75%, 12/10/2032
2.4
Federal Farm Credit Banks Funding Corp., 4.25%, 02/24/2028
2.3
U.S. Treasury Notes, 1.25%, 11/30/2026
2.3
U.S. Treasury Notes, 3.50%, 09/30/2026
2.3
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021498  
Shareholder Report [Line Items]  
Fund Name Transamerica Aegon U.S. Government Securities 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
$41
0.81%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.81% [11]
AssetsNet $ 215,500,009
Holdings Count | Holding 115
InvestmentCompanyPortfolioTurnover 58.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$215,500,009
Number of Portfolio Holdings
115
Portfolio Turnover Rate
58%
Average MaturityFootnote Reference§
7.41 years
DurationFootnote Reference
5.70 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
55.8%
U.S. Government Agency Obligations
34.3
Repurchase Agreements
6.3
Other Investment Company
5.7
Corporate Debt Securities
3.1
Asset-Backed Securities
2.1
Foreign Government Obligations
1.2
Mortgage-Backed Securities
0.9
Municipal Government Obligations
0.1
Net Other Assets (Liabilities)Footnote Reference^
(9.5)
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
90.1%
AAA
4.2
AA
0.3
A
2.4
BBB
0.5
Footnote Description
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)

Federal Farm Credit Banks Funding Corp., 2.04%, 09/24/2029
4.3%
U.S. Treasury Notes, 3.88%, 03/15/2028
3.7
Uniform Mortgage-Backed Security, TBA, 3.50%, 07/01/2039
3.4
Federal National Mortgage Association, 0.88%, 08/05/2030
3.3
Tennessee Valley Authority, 5.25%, 02/01/2055
2.7
Tennessee Valley Authority, 4.88%, 01/15/2048
2.6
Federal Home Loan Banks, 4.75%, 12/10/2032
2.4
Federal Farm Credit Banks Funding Corp., 4.25%, 02/24/2028
2.3
U.S. Treasury Notes, 1.25%, 11/30/2026
2.3
U.S. Treasury Notes, 3.50%, 09/30/2026
2.3
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000154895  
Shareholder Report [Line Items]  
Fund Name Transamerica American Funds Managed Risk 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% [12]
AssetsNet $ 834,581,124
Holdings Count | Holding 2
InvestmentCompanyPortfolioTurnover 4.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$834,581,124
Number of Portfolio Holdings
2
Portfolio Turnover Rate
4%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Investment Companies
97.4%
Repurchase Agreements
2.7
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)

American Funds Insurance Series - Asset Allocation Fund
97.4%
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021493  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock Government Money Market 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
$15
0.29%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.29% [13]
AssetsNet $ 717,836,798
Holdings Count | Holding 123
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$717,836,798
Number of Portfolio Holdings
123
Average MaturityFootnote Reference§
0.30 years
DurationFootnote Reference
0.11 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)

Repurchase Agreements
42.4%
Short-Term U.S. Government Obligations
30.6
U.S. Government Obligations
11.6
U.S. Government Agency Obligations
9.2
Short-Term U.S. Government Agency Obligations
8.3
Net Other Assets (Liabilities)Footnote Reference^
(2.1)
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 Bills, 4.32%, 08/05/2025
3.6%
U.S. Treasury Floating Rate Notes, 4.36%, 07/31/2025
2.4
U.S. Treasury Floating Rate Notes, 4.34%, 01/31/2027
2.1
U.S. Treasury Bills, 4.37%, 08/12/2025
1.8
U.S. Treasury Floating Rate Notes, 4.45%, 10/31/2026
1.8
U.S. Treasury Bills, 4.31%, 09/02/2025
1.8
U.S. Treasury Bills, 4.29%, 07/01/2025
1.8
U.S. Treasury Bills, 4.28%, 09/04/2025
1.7
U.S. Treasury Bills, 4.18%, 03/19/2026
1.7
U.S. Treasury Floating Rate Notes, 4.39%, 04/30/2026
1.5
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021494  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock Government Money Market 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
$27
0.54%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 27
Expense Ratio, Percent 0.54% [14]
AssetsNet $ 717,836,798
Holdings Count | Holding 123
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$717,836,798
Number of Portfolio Holdings
123
Average MaturityFootnote Reference§
0.30 years
DurationFootnote Reference
0.11 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)

Repurchase Agreements
42.4%
Short-Term U.S. Government Obligations
30.6
U.S. Government Obligations
11.6
U.S. Government Agency Obligations
9.2
Short-Term U.S. Government Agency Obligations
8.3
Net Other Assets (Liabilities)Footnote Reference^
(2.1)
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 Bills, 4.32%, 08/05/2025
3.6%
U.S. Treasury Floating Rate Notes, 4.36%, 07/31/2025
2.4
U.S. Treasury Floating Rate Notes, 4.34%, 01/31/2027
2.1
U.S. Treasury Bills, 4.37%, 08/12/2025
1.8
U.S. Treasury Floating Rate Notes, 4.45%, 10/31/2026
1.8
U.S. Treasury Bills, 4.31%, 09/02/2025
1.8
U.S. Treasury Bills, 4.29%, 07/01/2025
1.8
U.S. Treasury Bills, 4.28%, 09/04/2025
1.7
U.S. Treasury Bills, 4.18%, 03/19/2026
1.7
U.S. Treasury Floating Rate Notes, 4.39%, 04/30/2026
1.5
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000099459  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Active 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
$26
0.51%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.51% [15]
AssetsNet $ 193,524,424
Holdings Count | Holding 11
InvestmentCompanyPortfolioTurnover 74.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$193,524,424
Number of Portfolio Holdings
11
Portfolio Turnover Rate
74%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Fixed Income Funds
58.9%
U.S. Equity Funds
25.1
International Equity Funds
14.3
Repurchase Agreements
1.2
Other Investment Company
0.5
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)

iShares Core U.S. Aggregate Bond ETF
33.2%
iShares Core S&P 500 ETF
21.1
iShares Short Treasury Bond ETF
13.5
iShares MSCI EAFE ETF
10.3
iShares U.S. Treasury Bond ETF
4.7
iShares iBoxx $ Investment Grade Corporate Bond ETF
4.6
iShares Russell 2000 ETF
4.0
iShares 7-10 Year Treasury Bond ETF
2.9
iShares MSCI Japan ETF
2.2
iShares Core MSCI EAFE ETF
1.8
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000099460  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Active 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
$38
0.76%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.76% [16]
AssetsNet $ 193,524,424
Holdings Count | Holding 11
InvestmentCompanyPortfolioTurnover 74.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$193,524,424
Number of Portfolio Holdings
11
Portfolio Turnover Rate
74%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Fixed Income Funds
58.9%
U.S. Equity Funds
25.1
International Equity Funds
14.3
Repurchase Agreements
1.2
Other Investment Company
0.5
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)

iShares Core U.S. Aggregate Bond ETF
33.2%
iShares Core S&P 500 ETF
21.1
iShares Short Treasury Bond ETF
13.5
iShares MSCI EAFE ETF
10.3
iShares U.S. Treasury Bond ETF
4.7
iShares iBoxx $ Investment Grade Corporate Bond ETF
4.6
iShares Russell 2000 ETF
4.0
iShares 7-10 Year Treasury Bond ETF
2.9
iShares MSCI Japan ETF
2.2
iShares Core MSCI EAFE ETF
1.8
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000099461  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Active 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
$25
0.50%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.50% [17]
AssetsNet $ 326,618,098
Holdings Count | Holding 11
InvestmentCompanyPortfolioTurnover 119.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$326,618,098
Number of Portfolio Holdings
11
Portfolio Turnover Rate
119%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Equity Funds
50.1%
U.S. Fixed Income Funds
24.0
International Equity Funds
23.4
Repurchase Agreements
2.0
Net Other Assets (Liabilities)Footnote Reference^
0.5
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)

iShares Core S&P 500 ETF
43.1%
iShares MSCI EAFE ETF
17.2
iShares Short Treasury Bond ETF
12.2
iShares Core U.S. Aggregate Bond ETF
9.1
iShares Russell 2000 ETF
7.0
iShares Core MSCI EAFE ETF
4.0
iShares MSCI Japan ETF
2.2
iShares iBoxx $ Investment Grade Corporate Bond ETF
1.8
iShares U.S. Treasury Bond ETF
0.7
iShares 7-10 Year Treasury Bond ETF
0.2
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000099462  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Active 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
$38
0.75%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.75% [18]
AssetsNet $ 326,618,098
Holdings Count | Holding 11
InvestmentCompanyPortfolioTurnover 119.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$326,618,098
Number of Portfolio Holdings
11
Portfolio Turnover Rate
119%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Equity Funds
50.1%
U.S. Fixed Income Funds
24.0
International Equity Funds
23.4
Repurchase Agreements
2.0
Net Other Assets (Liabilities)Footnote Reference^
0.5
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)

iShares Core S&P 500 ETF
43.1%
iShares MSCI EAFE ETF
17.2
iShares Short Treasury Bond ETF
12.2
iShares Core U.S. Aggregate Bond ETF
9.1
iShares Russell 2000 ETF
7.0
iShares Core MSCI EAFE ETF
4.0
iShares MSCI Japan ETF
2.2
iShares iBoxx $ Investment Grade Corporate Bond ETF
1.8
iShares U.S. Treasury Bond ETF
0.7
iShares 7-10 Year Treasury Bond ETF
0.2
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000099463  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Active 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
$24
0.48%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 0.48% [19]
AssetsNet $ 846,156,756
Holdings Count | Holding 11
InvestmentCompanyPortfolioTurnover 96.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$846,156,756
Number of Portfolio Holdings
11
Portfolio Turnover Rate
96%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Fixed Income Funds
43.5%
U.S. Equity Funds
35.0
International Equity Funds
18.3
Repurchase Agreements
2.6
Other Investment Company
1.9
Net Other Assets (Liabilities)Footnote Reference^
(1.3)
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)

iShares Core S&P 500 ETF
30.0%
iShares Core U.S. Aggregate Bond ETF
25.4
iShares MSCI EAFE ETF
14.0
iShares Short Treasury Bond ETF
11.7
iShares Russell 2000 ETF
5.0
iShares iBoxx $ Investment Grade Corporate Bond ETF
3.2
iShares U.S. Treasury Bond ETF
2.6
iShares Core MSCI EAFE ETF
2.2
iShares MSCI Japan ETF
2.1
iShares 7-10 Year Treasury Bond ETF
0.6
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000099464  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Active 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
$37
0.73%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.73% [20]
AssetsNet $ 846,156,756
Holdings Count | Holding 11
InvestmentCompanyPortfolioTurnover 96.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$846,156,756
Number of Portfolio Holdings
11
Portfolio Turnover Rate
96%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Fixed Income Funds
43.5%
U.S. Equity Funds
35.0
International Equity Funds
18.3
Repurchase Agreements
2.6
Other Investment Company
1.9
Net Other Assets (Liabilities)Footnote Reference^
(1.3)
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)

iShares Core S&P 500 ETF
30.0%
iShares Core U.S. Aggregate Bond ETF
25.4
iShares MSCI EAFE ETF
14.0
iShares Short Treasury Bond ETF
11.7
iShares Russell 2000 ETF
5.0
iShares iBoxx $ Investment Grade Corporate Bond ETF
3.2
iShares U.S. Treasury Bond ETF
2.6
iShares Core MSCI EAFE ETF
2.2
iShares MSCI Japan ETF
2.1
iShares 7-10 Year Treasury Bond ETF
0.6
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000112676  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Dynamic Allocation - 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
$37
0.74%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.74% [21]
AssetsNet $ 637,114,806
Holdings Count | Holding 9
InvestmentCompanyPortfolioTurnover 88.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$637,114,806
Number of Portfolio Holdings
9
Portfolio Turnover Rate
88%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Fixed Income Funds
44.6%
U.S. Equity Funds
34.0
International Equity Funds
14.9
Repurchase Agreements
5.9
Net Other Assets (Liabilities)Footnote Reference^
0.6
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)

iShares Core S&P 500 ETF
34.0%
iShares Core U.S. Aggregate Bond ETF
18.0
iShares MSCI EAFE ETF
13.9
iShares Short Treasury Bond ETF
11.9
iShares 7-10 Year Treasury Bond ETF
11.2
iShares iBoxx $ Investment Grade Corporate Bond ETF
2.4
iShares U.S. Treasury Bond ETF
1.1
iShares Core MSCI EAFE ETF
1.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000112678  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Dynamic 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
$38
0.75%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.75% [22]
AssetsNet $ 293,485,547
Holdings Count | Holding 9
InvestmentCompanyPortfolioTurnover 114.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$293,485,547
Number of Portfolio Holdings
9
Portfolio Turnover Rate
114%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Equity Funds
49.1%
U.S. Fixed Income Funds
25.0
International Equity Funds
20.0
Repurchase Agreements
5.3
Other Investment Company
0.0Footnote Reference*
Net Other Assets (Liabilities)Footnote Reference^
0.6
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)

iShares Core S&P 500 ETF
49.1%
iShares Short Treasury Bond ETF
12.5
iShares Core MSCI EAFE ETF
10.8
iShares Core U.S. Aggregate Bond ETF
9.4
iShares MSCI EAFE ETF
9.2
iShares iBoxx $ Investment Grade Corporate Bond ETF
1.4
iShares 7-10 Year Treasury Bond ETF
0.9
iShares U.S. Treasury Bond ETF
0.8
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000167274  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Edge 100 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
$29
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 $ 29
Expense Ratio, Percent 0.56% [23]
AssetsNet $ 78,397,271
Holdings Count | Holding 8
InvestmentCompanyPortfolioTurnover 5.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$78,397,271
Number of Portfolio Holdings
8
Portfolio Turnover Rate
5%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Equity Funds
74.6%
International Equity Funds
25.2
Other Investment Company
14.0
Repurchase Agreements
0.2
Net Other Assets (Liabilities)Footnote Reference^
(14.0)
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)

iShares MSCI EAFE Min Vol Factor ETF
19.8%
iShares MSCI USA Momentum Factor ETF
16.5
iShares MSCI USA Min Vol Factor ETF
16.1
iShares MSCI USA Quality Factor ETF
16.1
iShares MSCI USA Value Factor ETF
16.1
iShares MSCI USA Size Factor ETF
9.8
iShares MSCI Emerging Markets Min Vol Factor ETF
5.4
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021485  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Edge 40 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
$16
0.31%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 16
Expense Ratio, Percent 0.31% [24]
AssetsNet $ 203,232,550
Holdings Count | Holding 9
InvestmentCompanyPortfolioTurnover 1.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$203,232,550
Number of Portfolio Holdings
9
Portfolio Turnover Rate
1%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Fixed Income Funds
59.1%
U.S. Equity Funds
30.4
Other Investment Company
12.2
International Equity Funds
10.4
Net Other Assets (Liabilities)Footnote Reference^
(12.1)
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)

iShares Core U.S. Aggregate Bond ETF
49.6%
iShares Broad USD Investment Grade Corporate Bond ETF
9.5
iShares MSCI EAFE Min Vol Factor ETF
8.1
iShares MSCI USA Momentum Factor ETF
6.8
iShares MSCI USA Value Factor ETF
6.6
iShares MSCI USA Min Vol Factor ETF
6.6
iShares MSCI USA Quality Factor ETF
6.4
iShares MSCI USA Size Factor ETF
4.0
iShares MSCI Emerging Markets Min Vol Factor ETF
2.3
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021486  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Edge 40 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
$29
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 $ 29
Expense Ratio, Percent 0.56% [25]
AssetsNet $ 203,232,550
Holdings Count | Holding 9
InvestmentCompanyPortfolioTurnover 1.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$203,232,550
Number of Portfolio Holdings
9
Portfolio Turnover Rate
1%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Fixed Income Funds
59.1%
U.S. Equity Funds
30.4
Other Investment Company
12.2
International Equity Funds
10.4
Net Other Assets (Liabilities)Footnote Reference^
(12.1)
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)

iShares Core U.S. Aggregate Bond ETF
49.6%
iShares Broad USD Investment Grade Corporate Bond ETF
9.5
iShares MSCI EAFE Min Vol Factor ETF
8.1
iShares MSCI USA Momentum Factor ETF
6.8
iShares MSCI USA Value Factor ETF
6.6
iShares MSCI USA Min Vol Factor ETF
6.6
iShares MSCI USA Quality Factor ETF
6.4
iShares MSCI USA Size Factor ETF
4.0
iShares MSCI Emerging Markets Min Vol Factor ETF
2.3
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000167272  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Edge 50 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
$28
0.54%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 0.54% [26]
AssetsNet $ 414,945,431
Holdings Count | Holding 9
InvestmentCompanyPortfolioTurnover 2.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$414,945,431
Number of Portfolio Holdings
9
Portfolio Turnover Rate
2%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Fixed Income Funds
49.6%
U.S. Equity Funds
37.7
International Equity Funds
12.7
Other Investment Company
1.2
Repurchase Agreements
0.1
Net Other Assets (Liabilities)Footnote Reference^
(1.3)
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)

iShares Core U.S. Aggregate Bond ETF
49.6%
iShares MSCI EAFE Min Vol Factor ETF
10.0
iShares MSCI USA Momentum Factor ETF
8.4
iShares MSCI USA Min Vol Factor ETF
8.2
iShares MSCI USA Value Factor ETF
8.2
iShares MSCI USA Quality Factor ETF
7.9
iShares MSCI USA Size Factor ETF
5.0
iShares MSCI Emerging Markets Min Vol Factor ETF
2.7
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000167273  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Edge 75 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
$29
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 $ 29
Expense Ratio, Percent 0.56% [27]
AssetsNet $ 151,783,993
Holdings Count | Holding 9
InvestmentCompanyPortfolioTurnover 4.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$151,783,993
Number of Portfolio Holdings
9
Portfolio Turnover Rate
4%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Equity Funds
56.1%
U.S. Fixed Income Funds
24.7
International Equity Funds
19.1
Other Investment Company
3.6
Repurchase Agreements
0.2
Net Other Assets (Liabilities)Footnote Reference^
(3.7)
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)

iShares Core U.S. Aggregate Bond ETF
24.7%
iShares MSCI EAFE Min Vol Factor ETF
15.0
iShares MSCI USA Momentum Factor ETF
12.5
iShares MSCI USA Value Factor ETF
12.2
iShares MSCI USA Quality Factor ETF
12.1
iShares MSCI USA Min Vol Factor ETF
12.0
iShares MSCI USA Size Factor ETF
7.3
iShares MSCI Emerging Markets Min Vol Factor ETF
4.1
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000074412  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Tactical - 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 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
$26
0.50%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.50% [28]
AssetsNet $ 319,184,242
Holdings Count | Holding 14
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$319,184,242
Number of Portfolio Holdings
14
Portfolio Turnover Rate
29%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

U.S. Fixed Income Funds
44.2%
U.S. Equity Funds
31.2
International Equity Funds
21.4
Other Investment Company
6.3
Repurchase Agreements
3.3
Net Other Assets (Liabilities)Footnote Reference^
(6.4)
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)

iShares Short Treasury Bond ETF
24.8%
iShares Core S&P Total U.S. Stock Market ETF
16.8
iShares Core S&P 500 ETF
14.5
iShares Core U.S. Aggregate Bond ETF
11.5
iShares MSCI EAFE ETF
6.4
iShares Core MSCI EAFE ETF
6.1
iShares Broad USD Investment Grade Corporate Bond ETF
5.9
iShares MSCI Emerging Markets ETF
2.9
iShares Core MSCI Emerging Markets ETF
2.4
iShares MSCI Japan ETF
2.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000074411  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Tactical - 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
$38
0.75%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.75% [29]
AssetsNet $ 319,184,242
Holdings Count | Holding 14
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$319,184,242
Number of Portfolio Holdings
14
Portfolio Turnover Rate
29%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

U.S. Fixed Income Funds
44.2%
U.S. Equity Funds
31.2
International Equity Funds
21.4
Other Investment Company
6.3
Repurchase Agreements
3.3
Net Other Assets (Liabilities)Footnote Reference^
(6.4)
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)

iShares Short Treasury Bond ETF
24.8%
iShares Core S&P Total U.S. Stock Market ETF
16.8
iShares Core S&P 500 ETF
14.5
iShares Core U.S. Aggregate Bond ETF
11.5
iShares MSCI EAFE ETF
6.4
iShares Core MSCI EAFE ETF
6.1
iShares Broad USD Investment Grade Corporate Bond ETF
5.9
iShares MSCI Emerging Markets ETF
2.9
iShares Core MSCI Emerging Markets ETF
2.4
iShares MSCI Japan ETF
2.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000074416  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Tactical - 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
$26
0.52%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.52% [30]
AssetsNet $ 156,811,750
Holdings Count | Holding 14
InvestmentCompanyPortfolioTurnover 24.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$156,811,750
Number of Portfolio Holdings
14
Portfolio Turnover Rate
24%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

U.S. Fixed Income Funds
59.1%
U.S. Equity Funds
21.5
International Equity Funds
16.0
Repurchase Agreements
3.4
Other Investment Company
1.7
Net Other Assets (Liabilities)Footnote Reference^
(1.7)
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)

iShares Short Treasury Bond ETF
24.8%
iShares Core U.S. Aggregate Bond ETF
24.4
iShares Core S&P Total U.S. Stock Market ETF
12.1
iShares Core S&P 500 ETF
9.4
iShares Broad USD Investment Grade Corporate Bond ETF
7.9
iShares MSCI EAFE ETF
5.1
iShares Core MSCI EAFE ETF
4.0
iShares MSCI Japan ETF
2.1
iShares MSCI Emerging Markets ETF
2.0
iShares Core MSCI Emerging Markets ETF
1.8
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000074415  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Tactical - 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
$39
0.77%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.77% [31]
AssetsNet $ 156,811,750
Holdings Count | Holding 14
InvestmentCompanyPortfolioTurnover 24.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$156,811,750
Number of Portfolio Holdings
14
Portfolio Turnover Rate
24%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

U.S. Fixed Income Funds
59.1%
U.S. Equity Funds
21.5
International Equity Funds
16.0
Repurchase Agreements
3.4
Other Investment Company
1.7
Net Other Assets (Liabilities)Footnote Reference^
(1.7)
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)

iShares Short Treasury Bond ETF
24.8%
iShares Core U.S. Aggregate Bond ETF
24.4
iShares Core S&P Total U.S. Stock Market ETF
12.1
iShares Core S&P 500 ETF
9.4
iShares Broad USD Investment Grade Corporate Bond ETF
7.9
iShares MSCI EAFE ETF
5.1
iShares Core MSCI EAFE ETF
4.0
iShares MSCI Japan ETF
2.1
iShares MSCI Emerging Markets ETF
2.0
iShares Core MSCI Emerging Markets ETF
1.8
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000074414  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Tactical - 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
$26
0.51%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.51% [32]
AssetsNet $ 236,592,117
Holdings Count | Holding 13
InvestmentCompanyPortfolioTurnover 30.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$236,592,117
Number of Portfolio Holdings
13
Portfolio Turnover Rate
30%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

U.S. Equity Funds
44.1%
International Equity Funds
28.6
U.S. Fixed Income Funds
26.7
Other Investment Company
7.8
Repurchase Agreements
0.7
Net Other Assets (Liabilities)Footnote Reference^
(7.9)
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)

iShares Core S&P Total U.S. Stock Market ETF
22.4%
iShares Core S&P 500 ETF
21.7
iShares Short Treasury Bond ETF
19.2
iShares MSCI EAFE ETF
9.4
iShares Core MSCI EAFE ETF
7.6
iShares Core U.S. Aggregate Bond ETF
6.0
iShares MSCI Emerging Markets ETF
3.9
iShares Core MSCI Emerging Markets ETF
3.6
iShares MSCI Canada ETF
2.1
iShares MSCI Japan ETF
2.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000074413  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock iShares Tactical - 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
$39
0.76%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.76% [33]
AssetsNet $ 236,592,117
Holdings Count | Holding 13
InvestmentCompanyPortfolioTurnover 30.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$236,592,117
Number of Portfolio Holdings
13
Portfolio Turnover Rate
30%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

U.S. Equity Funds
44.1%
International Equity Funds
28.6
U.S. Fixed Income Funds
26.7
Other Investment Company
7.8
Repurchase Agreements
0.7
Net Other Assets (Liabilities)Footnote Reference^
(7.9)
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)

iShares Core S&P Total U.S. Stock Market ETF
22.4%
iShares Core S&P 500 ETF
21.7
iShares Short Treasury Bond ETF
19.2
iShares MSCI EAFE ETF
9.4
iShares Core MSCI EAFE ETF
7.6
iShares Core U.S. Aggregate Bond ETF
6.0
iShares MSCI Emerging Markets ETF
3.9
iShares Core MSCI Emerging Markets ETF
3.6
iShares MSCI Canada ETF
2.1
iShares MSCI Japan ETF
2.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021441  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock Real Estate Securities 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
$44
0.85%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.85% [34]
AssetsNet $ 334,407,394
Holdings Count | Holding 77
InvestmentCompanyPortfolioTurnover 54.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$334,407,394
Number of Portfolio Holdings
77
Portfolio Turnover Rate
54%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Real Estate
93.7%
 
Health Care
1.0
 
Communication Services
0.7
 
Information Technology
0.6
 
Financials
0.3
Repurchase Agreements
2.7
Other Investment Company
1.8
Net Other Assets (Liabilities)Footnote Reference^
(0.8)
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)

Prologis, Inc., REIT
4.7%
AvalonBay Communities, Inc., REIT
4.2
Welltower, Inc., REIT
3.9
Digital Realty Trust, Inc., REIT
3.8
Equinix, Inc., REIT
3.8
Simon Property Group, Inc., REIT
3.1
VICI Properties, Inc., REIT
3.0
Sun Communities, Inc., REIT
2.5
Essex Property Trust, Inc., REIT
2.4
Goodman Group, REIT
2.4
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021442  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock Real Estate Securities 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
$56
1.10%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 56
Expense Ratio, Percent 1.10% [35]
AssetsNet $ 334,407,394
Holdings Count | Holding 77
InvestmentCompanyPortfolioTurnover 54.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$334,407,394
Number of Portfolio Holdings
77
Portfolio Turnover Rate
54%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Real Estate
93.7%
 
Health Care
1.0
 
Communication Services
0.7
 
Information Technology
0.6
 
Financials
0.3
Repurchase Agreements
2.7
Other Investment Company
1.8
Net Other Assets (Liabilities)Footnote Reference^
(0.8)
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)

Prologis, Inc., REIT
4.7%
AvalonBay Communities, Inc., REIT
4.2
Welltower, Inc., REIT
3.9
Digital Realty Trust, Inc., REIT
3.8
Equinix, Inc., REIT
3.8
Simon Property Group, Inc., REIT
3.1
VICI Properties, Inc., REIT
3.0
Sun Communities, Inc., REIT
2.5
Essex Property Trust, Inc., REIT
2.4
Goodman Group, REIT
2.4
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000076203  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock 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
$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% [36]
AssetsNet $ 799,709,435
Holdings Count | Holding 16
InvestmentCompanyPortfolioTurnover 51.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$799,709,435
Number of Portfolio Holdings
16
Portfolio Turnover Rate
51%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

U.S. Fixed Income Funds
46.1%
U.S. Equity Funds
39.5
International Equity Funds
12.4
Other Investment Company
0.5
Repurchase Agreements
0.1
International Alternative Funds
0.0Footnote Reference*
Net Other Assets (Liabilities)Footnote Reference^
1.4
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
21.3%
Transamerica Bond, Class I2
15.0
Transamerica Short-Term Bond, Class I2
14.3
Transamerica Aegon Core Bond VP, Initial Class
13.4
Transamerica Large Cap Value, Class I2
6.3
Transamerica TSW International Equity VP, Initial Class
6.2
Transamerica WMC US Growth VP, Initial Class
5.4
SPDR S&P 500 ETF Trust
4.7
Transamerica International Focus VP, Initial Class
3.7
Vanguard Total Bond Market ETF
3.4
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000076204  
Shareholder Report [Line Items]  
Fund Name Transamerica BlackRock 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
$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% [37]
AssetsNet $ 799,709,435
Holdings Count | Holding 16
InvestmentCompanyPortfolioTurnover 51.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$799,709,435
Number of Portfolio Holdings
16
Portfolio Turnover Rate
51%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

U.S. Fixed Income Funds
46.1%
U.S. Equity Funds
39.5
International Equity Funds
12.4
Other Investment Company
0.5
Repurchase Agreements
0.1
International Alternative Funds
0.0Footnote Reference*
Net Other Assets (Liabilities)Footnote Reference^
1.4
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
21.3%
Transamerica Bond, Class I2
15.0
Transamerica Short-Term Bond, Class I2
14.3
Transamerica Aegon Core Bond VP, Initial Class
13.4
Transamerica Large Cap Value, Class I2
6.3
Transamerica TSW International Equity VP, Initial Class
6.2
Transamerica WMC US Growth VP, Initial Class
5.4
SPDR S&P 500 ETF Trust
4.7
Transamerica International Focus VP, Initial Class
3.7
Vanguard Total Bond Market ETF
3.4
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000217588  
Shareholder Report [Line Items]  
Fund Name Transamerica Goldman Sachs 70/30 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
$27
0.53%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 27
Expense Ratio, Percent 0.53% [38]
AssetsNet $ 14,212,641
Holdings Count | Holding 11
InvestmentCompanyPortfolioTurnover 18.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$14,212,641
Number of Portfolio Holdings
11
Portfolio Turnover Rate
18%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Equity Funds
49.3%
U.S. Fixed Income Funds
29.2
International Equity Funds
21.0
Repurchase Agreements
0.7
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 WMC US Growth VP, Initial Class
24.2%
Transamerica Large Cap Value, Class I2
20.8
Transamerica Core Bond, Class I2
20.4
Transamerica International Stock, Class I2
9.5
Transamerica International Equity, Class I2
9.3
Transamerica Bond, Class I2
8.8
Transamerica Aegon Sustainable Equity Income VP, Initial Class
2.2
Transamerica Emerging Markets Equity, Class I2
2.2
Transamerica Small Cap Value, Class I2
1.1
Transamerica Small Cap Growth, Class I2
1.0
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000062365  
Shareholder Report [Line Items]  
Fund Name Transamerica Goldman Sachs Managed Risk - Balanced ETF 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
$17
0.33%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 17
Expense Ratio, Percent 0.33% [39]
AssetsNet $ 3,576,395,712
Holdings Count | Holding 14
InvestmentCompanyPortfolioTurnover 45.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$3,576,395,712
Number of Portfolio Holdings
14
Portfolio Turnover Rate
45%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Fixed Income Funds
46.7%
U.S. Equity Funds
36.2
International Equity Funds
16.6
Other Investment Company
0.6
Repurchase Agreements
0.5
Net Other Assets (Liabilities)Footnote Reference^
(0.6)
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)

Vanguard Total Bond Market ETF
19.9%
iShares Core U.S. Aggregate Bond ETF
19.8
Vanguard S&P 500 ETF
15.8
iShares Core S&P 500 ETF
10.5
Vanguard Intermediate-Term Corporate Bond ETF
7.0
Vanguard FTSE Developed Markets ETF
5.4
SPDR S&P 500 ETF Trust
5.2
iShares Core MSCI Emerging Markets ETF
5.1
iShares Core MSCI EAFE ETF
4.3
iShares Core S&P Mid-Cap ETF
2.6
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000062366  
Shareholder Report [Line Items]  
Fund Name Transamerica Goldman Sachs Managed Risk - Balanced ETF 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
$29
0.58%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 29
Expense Ratio, Percent 0.58% [40]
AssetsNet $ 3,576,395,712
Holdings Count | Holding 14
InvestmentCompanyPortfolioTurnover 45.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$3,576,395,712
Number of Portfolio Holdings
14
Portfolio Turnover Rate
45%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Fixed Income Funds
46.7%
U.S. Equity Funds
36.2
International Equity Funds
16.6
Other Investment Company
0.6
Repurchase Agreements
0.5
Net Other Assets (Liabilities)Footnote Reference^
(0.6)
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)

Vanguard Total Bond Market ETF
19.9%
iShares Core U.S. Aggregate Bond ETF
19.8
Vanguard S&P 500 ETF
15.8
iShares Core S&P 500 ETF
10.5
Vanguard Intermediate-Term Corporate Bond ETF
7.0
Vanguard FTSE Developed Markets ETF
5.4
SPDR S&P 500 ETF Trust
5.2
iShares Core MSCI Emerging Markets ETF
5.1
iShares Core MSCI EAFE ETF
4.3
iShares Core S&P Mid-Cap ETF
2.6
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000080975  
Shareholder Report [Line Items]  
Fund Name Transamerica Goldman Sachs Managed Risk - Conservative ETF 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
$18
0.36%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 18
Expense Ratio, Percent 0.36% [41]
AssetsNet $ 394,893,356
Holdings Count | Holding 15
InvestmentCompanyPortfolioTurnover 35.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$394,893,356
Number of Portfolio Holdings
15
Portfolio Turnover Rate
35%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Fixed Income Funds
62.1%
U.S. Equity Funds
25.9
International Equity Funds
11.3
Other Investment Company
1.9
Repurchase Agreements
0.8
Net Other Assets (Liabilities)Footnote Reference^
(2.0)
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)

Schwab U.S. Aggregate Bond ETF
19.3%
Vanguard Total Bond Market ETF
19.1
iShares Core U.S. Aggregate Bond ETF
18.9
Vanguard S&P 500 ETF
7.5
SPDR S&P 500 ETF Trust
7.5
iShares Core S&P 500 ETF
7.3
Vanguard Intermediate-Term Corporate Bond ETF
4.8
iShares Core MSCI Emerging Markets ETF
3.4
Vanguard FTSE Developed Markets ETF
2.9
iShares Core MSCI EAFE ETF
2.9
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000080976  
Shareholder Report [Line Items]  
Fund Name Transamerica Goldman Sachs Managed Risk - Conservative ETF 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
$31
0.61%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.61% [42]
AssetsNet $ 394,893,356
Holdings Count | Holding 15
InvestmentCompanyPortfolioTurnover 35.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$394,893,356
Number of Portfolio Holdings
15
Portfolio Turnover Rate
35%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Fixed Income Funds
62.1%
U.S. Equity Funds
25.9
International Equity Funds
11.3
Other Investment Company
1.9
Repurchase Agreements
0.8
Net Other Assets (Liabilities)Footnote Reference^
(2.0)
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)

Schwab U.S. Aggregate Bond ETF
19.3%
Vanguard Total Bond Market ETF
19.1
iShares Core U.S. Aggregate Bond ETF
18.9
Vanguard S&P 500 ETF
7.5
SPDR S&P 500 ETF Trust
7.5
iShares Core S&P 500 ETF
7.3
Vanguard Intermediate-Term Corporate Bond ETF
4.8
iShares Core MSCI Emerging Markets ETF
3.4
Vanguard FTSE Developed Markets ETF
2.9
iShares Core MSCI EAFE ETF
2.9
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000062367  
Shareholder Report [Line Items]  
Fund Name Transamerica Goldman Sachs Managed Risk - Growth ETF 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
$17
0.34%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 17
Expense Ratio, Percent 0.34% [43]
AssetsNet $ 1,714,566,924
Holdings Count | Holding 14
InvestmentCompanyPortfolioTurnover 67.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$1,714,566,924
Number of Portfolio Holdings
14
Portfolio Turnover Rate
67%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Equity Funds
54.6%
International Equity Funds
24.1
U.S. Fixed Income Funds
20.8
Other Investment Company
2.3
Repurchase Agreements
0.5
Net Other Assets (Liabilities)Footnote Reference^
(2.3)
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)

Vanguard S&P 500 ETF
19.1%
iShares Core S&P 500 ETF
17.4
SPDR S&P 500 ETF Trust
10.8
Vanguard Total Bond Market ETF
7.5
iShares Core U.S. Aggregate Bond ETF
7.4
iShares Core MSCI Emerging Markets ETF
7.1
Vanguard Intermediate-Term Corporate Bond ETF
5.9
Vanguard FTSE Developed Markets ETF
5.8
iShares Core MSCI EAFE ETF
5.6
iShares MSCI EAFE ETF
5.3
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000062368  
Shareholder Report [Line Items]  
Fund Name Transamerica Goldman Sachs Managed Risk - Growth ETF 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
$30
0.59%Footnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.59% [44]
AssetsNet $ 1,714,566,924
Holdings Count | Holding 14
InvestmentCompanyPortfolioTurnover 67.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$1,714,566,924
Number of Portfolio Holdings
14
Portfolio Turnover Rate
67%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

U.S. Equity Funds
54.6%
International Equity Funds
24.1
U.S. Fixed Income Funds
20.8
Other Investment Company
2.3
Repurchase Agreements
0.5
Net Other Assets (Liabilities)Footnote Reference^
(2.3)
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)

Vanguard S&P 500 ETF
19.1%
iShares Core S&P 500 ETF
17.4
SPDR S&P 500 ETF Trust
10.8
Vanguard Total Bond Market ETF
7.5
iShares Core U.S. Aggregate Bond ETF
7.4
iShares Core MSCI Emerging Markets ETF
7.1
Vanguard Intermediate-Term Corporate Bond ETF
5.9
Vanguard FTSE Developed Markets ETF
5.8
iShares Core MSCI EAFE ETF
5.6
iShares MSCI EAFE ETF
5.3
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000193819  
Shareholder Report [Line Items]  
Fund Name Transamerica Great Lakes Advisors Large 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
$49
0.94%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 49
Expense Ratio, Percent 0.94% [45]
AssetsNet $ 72,643,140
Holdings Count | Holding 47
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$72,643,140
Number of Portfolio Holdings
47
Portfolio Turnover Rate
12%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Financials
21.3%
 
Health Care
16.1
 
Industrials
15.9
 
Communication Services
9.7
 
Consumer Discretionary
8.0
 
Information Technology
7.5
 
Energy
6.3
 
Materials
5.0
 
Consumer Staples
3.4
 
Real Estate
3.4
 
Utilities
1.9
Repurchase Agreements
1.8
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)

JPMorgan Chase & Co.
4.2%
Wells Fargo & Co.
3.7
Exxon Mobil Corp.
3.3
Blackrock, Inc.
3.2
Abbott Laboratories
3.1
RTX Corp.
3.1
Intercontinental Exchange, Inc.
3.0
Walt Disney Co.
2.7
Hartford Insurance Group, Inc.
2.7
Alphabet, Inc., Class A
2.6
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021481  
Shareholder Report [Line Items]  
Fund Name Transamerica International Focus 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
$45
0.84%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.84% [46]
AssetsNet $ 325,248,767
Holdings Count | Holding 33
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$325,248,767
Number of Portfolio Holdings
33
Portfolio Turnover Rate
12%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Information Technology
21.9%
 
Consumer Discretionary
21.0
 
Industrials
20.0
 
Financials
9.8
 
Consumer Staples
8.8
 
Materials
7.5
 
Communication Services
6.3
 
Health Care
4.2
Repurchase Agreements
4.4
Other Investment Company
0.1
Net Other Assets (Liabilities)Footnote Reference^
(4.0)
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
18.9%
Canada
12.6
United States
10.0
Netherlands
9.6
Germany
7.2
France
7.1
Switzerland
7.0
Taiwan
4.3
Sweden
4.1
United Kingdom
3.9
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Safran SA
4.7%
Taiwan Semiconductor Manufacturing Co. Ltd., ADR
4.3
Ajinomoto Co., Inc.
4.2
ITOCHU Corp.
4.2
SAP SE
3.9
Compass Group PLC
3.9
Sika AG
3.8
Constellation Software, Inc.
3.8
Linde PLC
3.6
Ferrari NV
3.5
Updated Prospectus Web Address transamerica.com/annuities/prospectus
C000021482  
Shareholder Report [Line Items]  
Fund Name Transamerica International Focus 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
$58
1.09%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 58
Expense Ratio, Percent 1.09% [47]
AssetsNet $ 325,248,767
Holdings Count | Holding 33
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Total Net Assets
$325,248,767
Number of Portfolio Holdings
33
Portfolio Turnover Rate
12%
Holdings [Text Block]

Asset Allocations (Percentage of Net Assets)

Common Stocks
 
Information Technology
21.9%
 
Consumer Discretionary
21.0
 
Industrials
20.0
 
Financials
9.8
 
Consumer Staples
8.8
 
Materials
7.5
 
Communication Services
6.3
 
Health Care
4.2
Repurchase Agreements
4.4
Other Investment Company
0.1
Net Other Assets (Liabilities)Footnote Reference^
(4.0)
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
18.9%
Canada
12.6
United States
10.0
Netherlands
9.6
Germany
7.2
France
7.1
Switzerland
7.0
Taiwan
4.3
Sweden
4.1
United Kingdom
3.9
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Safran SA
4.7%
Taiwan Semiconductor Manufacturing Co. Ltd., ADR
4.3
Ajinomoto Co., Inc.
4.2
ITOCHU Corp.
4.2
SAP SE
3.9
Compass Group PLC
3.9
Sika AG
3.8
Constellation Software, Inc.
3.8
Linde PLC
3.6
Ferrari NV
3.5
Updated Prospectus Web Address transamerica.com/annuities/prospectus
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