v3.26.1
Shareholder Report
6 Months Ended
Jun. 30, 2026
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, 2026
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$22
0.44%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.44% [1],[2]
AssetsNet $ 83,460,851
Holdings Count | Holding 4
InvestmentCompanyPortfolioTurnover 5.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$83,460,851
Number of Portfolio Holdings
4
Portfolio Turnover Rate
5%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Equity Funds
45.3%
U.S. Fixed Income Funds
39.7
International Equity Funds
15.1
Net Other Assets (Liabilities)Footnote Reference^
(0.1)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Table Summary
Transamerica S&P 500 Index VP, Initial Class
45.3%
Transamerica Short-Term Bond, Class I2
19.9
Transamerica Core Bond, Class I2
19.8
Transamerica MSCI EAFE Index VP, Initial Class
15.1
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$26
0.53%Footnote Reference*,Footnote Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.53% [3],[4]
AssetsNet $ 1,773,412,069
Holdings Count | Holding 524
InvestmentCompanyPortfolioTurnover 42.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$1,773,412,069
Number of Portfolio Holdings
524
Portfolio Turnover Rate
42%
Average MaturityFootnote Reference§
7.86 years
DurationFootnote Reference
5.79 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 Allocation (Percentage of Net Assets)

Table Summary
Corporate Debt Securities
43.2%
U.S. Government Obligations
16.6
Mortgage-Backed Securities
14.6
Asset-Backed Securities
12.1
U.S. Government Agency Obligations
10.3
Commercial Paper
4.8
Foreign Government Obligations
1.1
Other Investment Company
1.0
Short-Term U.S. Government Obligations
0.4
Net Other Assets (Liabilities)Footnote Reference^
(4.1)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.

Credit Quality (Percentage of Net Assets)Footnote Reference 

Table Summary
U.S. Government and Agency Securities
26.9%
AAA
19.6
AA
3.3
A
11.9
BBB
24.5
BB
9.0
B
2.1
CCC
0.4
Below CCC
0.0Footnote Reference*
NR (Not Rated)
0.2
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 & 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 & 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)

Table Summary
Uniform Mortgage-Backed Security, TBA, 2.00%, 07/01/2056
1.9%
U.S. Treasury Bonds, 3.88%, 05/15/2043
1.5
Uniform Mortgage-Backed Security, TBA, 2.50%, 07/01/2056
1.1
Uniform Mortgage-Backed Security, TBA, 5.50%, 07/01/2056
1.1
Uniform Mortgage-Backed Security, TBA, 6.00%, 07/01/2056
1.0
Federal Home Loan Mortgage Corp., 5.00%, 05/01/2056
1.0
U.S. Treasury Bonds, 4.63%, 11/15/2055
1.0
Sumitomo Mitsui Trust Bank Ltd., 3.96%, 07/21/2026
1.0
U.S. Treasury Bonds, 1.25%, 05/15/2050
0.9
U.S. Treasury Notes, 4.13%, 04/30/2033
0.9
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, 2026 to June 30, 2026.
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)

Table Summary
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 Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.78% [5],[6]
AssetsNet $ 1,773,412,069
Holdings Count | Holding 524
InvestmentCompanyPortfolioTurnover 42.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$1,773,412,069
Number of Portfolio Holdings
524
Portfolio Turnover Rate
42%
Average MaturityFootnote Reference§
7.86 years
DurationFootnote Reference
5.79 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 Allocation (Percentage of Net Assets)

Table Summary
Corporate Debt Securities
43.2%
U.S. Government Obligations
16.6
Mortgage-Backed Securities
14.6
Asset-Backed Securities
12.1
U.S. Government Agency Obligations
10.3
Commercial Paper
4.8
Foreign Government Obligations
1.1
Other Investment Company
1.0
Short-Term U.S. Government Obligations
0.4
Net Other Assets (Liabilities)Footnote Reference^
(4.1)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.

Credit Quality (Percentage of Net Assets)Footnote Reference 

Table Summary
U.S. Government and Agency Securities
26.9%
AAA
19.6
AA
3.3
A
11.9
BBB
24.5
BB
9.0
B
2.1
CCC
0.4
Below CCC
0.0Footnote Reference*
NR (Not Rated)
0.2
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 & 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 & 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)

Table Summary
Uniform Mortgage-Backed Security, TBA, 2.00%, 07/01/2056
1.9%
U.S. Treasury Bonds, 3.88%, 05/15/2043
1.5
Uniform Mortgage-Backed Security, TBA, 2.50%, 07/01/2056
1.1
Uniform Mortgage-Backed Security, TBA, 5.50%, 07/01/2056
1.1
Uniform Mortgage-Backed Security, TBA, 6.00%, 07/01/2056
1.0
Federal Home Loan Mortgage Corp., 5.00%, 05/01/2056
1.0
U.S. Treasury Bonds, 4.63%, 11/15/2055
1.0
Sumitomo Mitsui Trust Bank Ltd., 3.96%, 07/21/2026
1.0
U.S. Treasury Bonds, 1.25%, 05/15/2050
0.9
U.S. Treasury Notes, 4.13%, 04/30/2033
0.9
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$22
0.45%Footnote Reference*,Footnote Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.45% [7],[8]
AssetsNet $ 1,426,639,770
Holdings Count | Holding 709
InvestmentCompanyPortfolioTurnover 44.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$1,426,639,770
Number of Portfolio Holdings
709
Portfolio Turnover Rate
44%
Average MaturityFootnote Reference§
7.95 years
DurationFootnote Reference
5.81 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 Allocation (Percentage of Net Assets)

Table Summary
Corporate Debt Securities
33.9%
U.S. Government Obligations
26.2
U.S. Government Agency Obligations
24.2
Commercial Paper
19.9
Mortgage-Backed Securities
7.5
Asset-Backed Securities
5.8
Short-Term U.S. Government Obligations
2.3
Other Investment Company
0.6
Foreign Government Obligations
0.6
Net Other Assets (Liabilities)Footnote Reference^
(21.0)
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.

Credit Quality (Percentage of Net Assets)Footnote Reference 

Table Summary
U.S. Government and Agency Securities
50.4%
AAA
12.4
AA
1.1
A
8.7
BBB
22.0
BB
3.3
B
0.0Footnote Reference*
CCC
0.0Footnote Reference*
Below CCC
0.0Footnote Reference*
NR (Not Rated)
0.3
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 & 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 & 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)

Table Summary
Uniform Mortgage-Backed Security, TBA, 2.50%, 07/01/2056
4.0%
Uniform Mortgage-Backed Security, TBA, 5.50%, 07/01/2056
3.4
Uniform Mortgage-Backed Security, TBA, 3.00%, 07/01/2056
2.9
Uniform Mortgage-Backed Security, TBA, 5.00%, 07/01/2056
2.2
Uniform Mortgage-Backed Security, TBA, 4.50%, 07/01/2056
2.1
Uniform Mortgage-Backed Security, TBA, 4.00%, 07/01/2056
2.0
Uniform Mortgage-Backed Security, TBA, 6.00%, 07/01/2056
1.9
U.S. Treasury Notes, 2.75%, 08/15/2032
1.4
Uniform Mortgage-Backed Security, TBA, 3.50%, 07/01/2056
1.3
Uniform Mortgage-Backed Security, TBA, 2.00%, 07/01/2056
1.2
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$35
0.70%Footnote Reference*,Footnote Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 35
Expense Ratio, Percent 0.70% [9],[10]
AssetsNet $ 1,426,639,770
Holdings Count | Holding 709
InvestmentCompanyPortfolioTurnover 44.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$1,426,639,770
Number of Portfolio Holdings
709
Portfolio Turnover Rate
44%
Average MaturityFootnote Reference§
7.95 years
DurationFootnote Reference
5.81 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 Allocation (Percentage of Net Assets)

Table Summary
Corporate Debt Securities
33.9%
U.S. Government Obligations
26.2
U.S. Government Agency Obligations
24.2
Commercial Paper
19.9
Mortgage-Backed Securities
7.5
Asset-Backed Securities
5.8
Short-Term U.S. Government Obligations
2.3
Other Investment Company
0.6
Foreign Government Obligations
0.6
Net Other Assets (Liabilities)Footnote Reference^
(21.0)
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.

Credit Quality (Percentage of Net Assets)Footnote Reference 

Table Summary
U.S. Government and Agency Securities
50.4%
AAA
12.4
AA
1.1
A
8.7
BBB
22.0
BB
3.3
B
0.0Footnote Reference*
CCC
0.0Footnote Reference*
Below CCC
0.0Footnote Reference*
NR (Not Rated)
0.3
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 & 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 & 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)

Table Summary
Uniform Mortgage-Backed Security, TBA, 2.50%, 07/01/2056
4.0%
Uniform Mortgage-Backed Security, TBA, 5.50%, 07/01/2056
3.4
Uniform Mortgage-Backed Security, TBA, 3.00%, 07/01/2056
2.9
Uniform Mortgage-Backed Security, TBA, 5.00%, 07/01/2056
2.2
Uniform Mortgage-Backed Security, TBA, 4.50%, 07/01/2056
2.1
Uniform Mortgage-Backed Security, TBA, 4.00%, 07/01/2056
2.0
Uniform Mortgage-Backed Security, TBA, 6.00%, 07/01/2056
1.9
U.S. Treasury Notes, 2.75%, 08/15/2032
1.4
Uniform Mortgage-Backed Security, TBA, 3.50%, 07/01/2056
1.3
Uniform Mortgage-Backed Security, TBA, 2.00%, 07/01/2056
1.2
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, 2026 to June 30, 2026.
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)

Table Summary
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 Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.63% [11],[12]
AssetsNet $ 242,062,244
Holdings Count | Holding 374
InvestmentCompanyPortfolioTurnover 24.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$242,062,244
Number of Portfolio Holdings
374
Portfolio Turnover Rate
24%
Average MaturityFootnote Reference§
4.41 years
DurationFootnote Reference
2.85 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 Allocation (Percentage of Net Assets)

Table Summary
Corporate Debt Securities
93.8%
Other Investment Company
7.1
Loan Assignments
1.9
Common Stocks
0.2
Net Other Assets (Liabilities)Footnote Reference^
(3.0)
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.

Credit Quality (Percentage of Net Assets)Footnote Reference 

Table Summary
BBB
11.2%
BB
46.7
B
32.3
CCC
5.5
Below CCC
0.0Footnote Reference*
NR (Not Rated)
0.0Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote
Credit quality represents a percentage of net assets at the end of the reporting period. Ratings BBB or higher are considered investment grade. Not rated securities do not necessarily indicate low credit quality, and may or may not be equivalent of investment grade. The table reflects Standard & 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 & 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)

Table Summary
ILFC E-Capital Trust I, 6.48%, 12/21/2065
0.9%
Olympus Water U.S. Holding Corp., 7.25%, 02/15/2033
0.8
Constellation Insurance, Inc., 6.80%, 01/24/2030
0.8
EMRLD Borrower LP/Emerald Co-Issuer, Inc., 6.63%, 12/15/2030
0.8
VZ Secured Financing BV, 5.00%, 01/15/2032
0.8
UKG, Inc., 6.88%, 02/01/2031
0.7
Alpha Generation LLC, 6.25%, 01/15/2034
0.7
Avis Budget Car Rental LLC/Avis Budget Finance, Inc., 8.00%, 02/15/2031
0.7
UWM Holdings LLC, 6.63%, 02/01/2030
0.7
NCR Voyix Corp., 5.00%, 10/01/2028
0.7
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$44
0.88%Footnote Reference*,Footnote Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.88% [13],[14]
AssetsNet $ 242,062,244
Holdings Count | Holding 374
InvestmentCompanyPortfolioTurnover 24.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$242,062,244
Number of Portfolio Holdings
374
Portfolio Turnover Rate
24%
Average MaturityFootnote Reference§
4.41 years
DurationFootnote Reference
2.85 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 Allocation (Percentage of Net Assets)

Table Summary
Corporate Debt Securities
93.8%
Other Investment Company
7.1
Loan Assignments
1.9
Common Stocks
0.2
Net Other Assets (Liabilities)Footnote Reference^
(3.0)
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.

Credit Quality (Percentage of Net Assets)Footnote Reference 

Table Summary
BBB
11.2%
BB
46.7
B
32.3
CCC
5.5
Below CCC
0.0Footnote Reference*
NR (Not Rated)
0.0Footnote Reference*
Footnote Description
Footnote*
Percentage rounds to less than 0.1% or (0.1)%.
Footnote
Credit quality represents a percentage of net assets at the end of the reporting period. Ratings BBB or higher are considered investment grade. Not rated securities do not necessarily indicate low credit quality, and may or may not be equivalent of investment grade. The table reflects Standard & 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 & 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)

Table Summary
ILFC E-Capital Trust I, 6.48%, 12/21/2065
0.9%
Olympus Water U.S. Holding Corp., 7.25%, 02/15/2033
0.8
Constellation Insurance, Inc., 6.80%, 01/24/2030
0.8
EMRLD Borrower LP/Emerald Co-Issuer, Inc., 6.63%, 12/15/2030
0.8
VZ Secured Financing BV, 5.00%, 01/15/2032
0.8
UKG, Inc., 6.88%, 02/01/2031
0.7
Alpha Generation LLC, 6.25%, 01/15/2034
0.7
Avis Budget Car Rental LLC/Avis Budget Finance, Inc., 8.00%, 02/15/2031
0.7
UWM Holdings LLC, 6.63%, 02/01/2030
0.7
NCR Voyix Corp., 5.00%, 10/01/2028
0.7
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$39
0.72%Footnote Reference*Footnote Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.72% [15],[16]
AssetsNet $ 522,385,155
Holdings Count | Holding 43
InvestmentCompanyPortfolioTurnover 22.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$522,385,155
Number of Portfolio Holdings
43
Portfolio Turnover Rate
22%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
Common Stocks
 
Information Technology
25.8%
 
Financials
18.9
 
Industrials
15.0
 
Health Care
14.8
 
Materials
7.2
 
Consumer Staples
6.0
 
Consumer Discretionary
5.4
 
Real Estate
3.6
 
Communication Services
2.2
 
Utilities
1.0
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)

Table Summary
Apple, Inc.
5.0%
Cisco Systems, Inc.
4.8
Microsoft Corp.
4.6
Morgan Stanley
3.5
AbbVie, Inc.
3.5
Citizens Financial Group, Inc.
3.1
Gilead Sciences, Inc.
3.0
KLA Corp.
3.0
Linde PLC
3.0
WESCO International, Inc.
2.9
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$53
0.97%Footnote Reference*Footnote Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 53
Expense Ratio, Percent 0.97% [17],[18]
AssetsNet $ 522,385,155
Holdings Count | Holding 43
InvestmentCompanyPortfolioTurnover 22.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$522,385,155
Number of Portfolio Holdings
43
Portfolio Turnover Rate
22%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
Common Stocks
 
Information Technology
25.8%
 
Financials
18.9
 
Industrials
15.0
 
Health Care
14.8
 
Materials
7.2
 
Consumer Staples
6.0
 
Consumer Discretionary
5.4
 
Real Estate
3.6
 
Communication Services
2.2
 
Utilities
1.0
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)

Table Summary
Apple, Inc.
5.0%
Cisco Systems, Inc.
4.8
Microsoft Corp.
4.6
Morgan Stanley
3.5
AbbVie, Inc.
3.5
Citizens Financial Group, Inc.
3.1
Gilead Sciences, Inc.
3.0
KLA Corp.
3.0
Linde PLC
3.0
WESCO International, Inc.
2.9
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, 2026 to June 30, 2026.
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)

Table Summary
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 Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 28
Expense Ratio, Percent 0.56% [19],[20]
AssetsNet $ 170,336,800
Holdings Count | Holding 108
InvestmentCompanyPortfolioTurnover 40.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$170,336,800
Number of Portfolio Holdings
108
Portfolio Turnover Rate
40%
Average MaturityFootnote Reference§
9.60 years
DurationFootnote Reference
5.63 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 Allocation (Percentage of Net Assets)

Table Summary
U.S. Government Obligations
49.0%
U.S. Government Agency Obligations
44.8
Corporate Debt Securities
2.7
Repurchase Agreements
1.1
Other Investment Company
0.8
Asset-Backed Securities
0.6
Mortgage-Backed Securities
0.1
Net Other Assets (Liabilities)Footnote Reference^
0.9
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.

Credit Quality (Percentage of Net Assets)Footnote Reference 

Table Summary
U.S. Government and Agency Securities
93.8%
AAA
0.6
AA
0.6
A
1.3
BBB
0.9
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 & 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 & 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)

Table Summary
Federal Farm Credit Banks Funding Corp., 2.04%, 09/24/2029
5.5%
Federal National Mortgage Association, 0.88%, 08/05/2030
4.3
Tennessee Valley Authority, 5.25%, 02/01/2055
3.5
Federal National Mortgage Association, 2.50%, 07/01/2052
3.4
Tennessee Valley Authority, 4.88%, 01/15/2048
3.4
Federal Home Loan Banks, 4.75%, 12/10/2032
3.0
Federal Farm Credit Banks Funding Corp., 4.25%, 02/24/2028
2.9
Tennessee Valley Authority, 4.38%, 08/01/2034
2.9
Federal National Mortgage Association, 5.00%, 03/01/2056
2.8
Federal Home Loan Mortgage Corp., 4.00%, 02/01/2041
2.8
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$40
0.81%Footnote Reference*,Footnote Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.81% [21],[22]
AssetsNet $ 170,336,800
Holdings Count | Holding 108
InvestmentCompanyPortfolioTurnover 40.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$170,336,800
Number of Portfolio Holdings
108
Portfolio Turnover Rate
40%
Average MaturityFootnote Reference§
9.60 years
DurationFootnote Reference
5.63 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 Allocation (Percentage of Net Assets)

Table Summary
U.S. Government Obligations
49.0%
U.S. Government Agency Obligations
44.8
Corporate Debt Securities
2.7
Repurchase Agreements
1.1
Other Investment Company
0.8
Asset-Backed Securities
0.6
Mortgage-Backed Securities
0.1
Net Other Assets (Liabilities)Footnote Reference^
0.9
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.

Credit Quality (Percentage of Net Assets)Footnote Reference 

Table Summary
U.S. Government and Agency Securities
93.8%
AAA
0.6
AA
0.6
A
1.3
BBB
0.9
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 & 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 & 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)

Table Summary
Federal Farm Credit Banks Funding Corp., 2.04%, 09/24/2029
5.5%
Federal National Mortgage Association, 0.88%, 08/05/2030
4.3
Tennessee Valley Authority, 5.25%, 02/01/2055
3.5
Federal National Mortgage Association, 2.50%, 07/01/2052
3.4
Tennessee Valley Authority, 4.88%, 01/15/2048
3.4
Federal Home Loan Banks, 4.75%, 12/10/2032
3.0
Federal Farm Credit Banks Funding Corp., 4.25%, 02/24/2028
2.9
Tennessee Valley Authority, 4.38%, 08/01/2034
2.9
Federal National Mortgage Association, 5.00%, 03/01/2056
2.8
Federal Home Loan Mortgage Corp., 4.00%, 02/01/2041
2.8
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$41
0.81%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.81% [23],[24]
AssetsNet $ 772,689,820
Holdings Count | Holding 1
InvestmentCompanyPortfolioTurnover 1.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$772,689,820
Number of Portfolio Holdings
1
Portfolio Turnover Rate
1%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
Investment Companies
96.4%
Net Other Assets (Liabilities)Footnote Reference^
3.6
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)

Table Summary
American Funds Insurance Series - Asset Allocation Fund
96.4%
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$15
0.30%Footnote Reference*Footnote Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.30% [25],[26]
AssetsNet $ 657,656,883
Holdings Count | Holding 180
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$657,656,883
Number of Portfolio Holdings
180
Average MaturityFootnote Reference§
0.27 years
DurationFootnote Reference
0.09 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 Allocation (Percentage of Net Assets)

Table Summary
Repurchase Agreements
38.6%
Short-Term U.S. Government Obligations
19.7
Short-Term U.S. Government Agency Obligations
19.2
U.S. Government Obligations
13.0
U.S. Government Agency Obligations
10.5
Net Other Assets (Liabilities)Footnote Reference^
(1.0)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Table Summary
U.S. Treasury Floating Rate Notes, 3.87%, 01/31/2027
2.3%
U.S. Treasury Bills, 3.69%, 08/11/2026
2.1
U.S. Treasury Bills, 3.85%, 09/03/2026
1.9
U.S. Treasury Floating Rate Notes, 3.97%, 10/31/2027
1.8
U.S. Treasury Floating Rate Notes, 3.98%, 10/31/2026
1.8
U.S. Treasury Bills, 3.65%, 09/03/2026
1.6
U.S. Treasury Bills, 3.68%, 08/20/2026
1.5
Federal Home Loan Bank Discount Notes, 3.61%, 07/08/2026
1.4
U.S. Treasury Bills, 3.69%, 08/13/2026
1.4
U.S. Treasury Notes, 4.13%, 02/28/2027
1.2
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$27
0.55%Footnote Reference*Footnote Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 27
Expense Ratio, Percent 0.55% [27],[28]
AssetsNet $ 657,656,883
Holdings Count | Holding 180
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$657,656,883
Number of Portfolio Holdings
180
Average MaturityFootnote Reference§
0.27 years
DurationFootnote Reference
0.09 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 Allocation (Percentage of Net Assets)

Table Summary
Repurchase Agreements
38.6%
Short-Term U.S. Government Obligations
19.7
Short-Term U.S. Government Agency Obligations
19.2
U.S. Government Obligations
13.0
U.S. Government Agency Obligations
10.5
Net Other Assets (Liabilities)Footnote Reference^
(1.0)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Table Summary
U.S. Treasury Floating Rate Notes, 3.87%, 01/31/2027
2.3%
U.S. Treasury Bills, 3.69%, 08/11/2026
2.1
U.S. Treasury Bills, 3.85%, 09/03/2026
1.9
U.S. Treasury Floating Rate Notes, 3.97%, 10/31/2027
1.8
U.S. Treasury Floating Rate Notes, 3.98%, 10/31/2026
1.8
U.S. Treasury Bills, 3.65%, 09/03/2026
1.6
U.S. Treasury Bills, 3.68%, 08/20/2026
1.5
Federal Home Loan Bank Discount Notes, 3.61%, 07/08/2026
1.4
U.S. Treasury Bills, 3.69%, 08/13/2026
1.4
U.S. Treasury Notes, 4.13%, 02/28/2027
1.2
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$26
0.51%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.51% [29],[30]
AssetsNet $ 182,122,383
Holdings Count | Holding 9
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$182,122,383
Number of Portfolio Holdings
9
Portfolio Turnover Rate
29%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
62.5%
U.S. Equity Funds
23.3
International Equity Funds
12.6
Other Investment Company
7.2
Net Other Assets (Liabilities)Footnote Reference^
(5.6)
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)

Table Summary
iShares Core U.S. Aggregate Bond ETF
32.4%
iShares Core S&P 500 ETF
19.3
iShares 7-10 Year Treasury Bond ETF
12.5
iShares MSCI EAFE ETF
11.5
iShares 0-1 Year Treasury Bond ETF
10.3
iShares iBoxx USD Investment Grade Corporate Bond ETF
4.8
iShares Russell 2000 ETF
4.0
iShares U.S. Treasury Bond ETF
2.5
iShares MSCI Japan ETF
1.1
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$39
0.76%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.76% [31],[32]
AssetsNet $ 182,122,383
Holdings Count | Holding 9
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$182,122,383
Number of Portfolio Holdings
9
Portfolio Turnover Rate
29%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
62.5%
U.S. Equity Funds
23.3
International Equity Funds
12.6
Other Investment Company
7.2
Net Other Assets (Liabilities)Footnote Reference^
(5.6)
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)

Table Summary
iShares Core U.S. Aggregate Bond ETF
32.4%
iShares Core S&P 500 ETF
19.3
iShares 7-10 Year Treasury Bond ETF
12.5
iShares MSCI EAFE ETF
11.5
iShares 0-1 Year Treasury Bond ETF
10.3
iShares iBoxx USD Investment Grade Corporate Bond ETF
4.8
iShares Russell 2000 ETF
4.0
iShares U.S. Treasury Bond ETF
2.5
iShares MSCI Japan ETF
1.1
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$26
0.50%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.50% [33],[34]
AssetsNet $ 322,558,954
Holdings Count | Holding 9
InvestmentCompanyPortfolioTurnover 31.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$322,558,954
Number of Portfolio Holdings
9
Portfolio Turnover Rate
31%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Equity Funds
49.3%
U.S. Fixed Income Funds
23.8
International Equity Funds
23.1
Other Investment Company
2.5
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)

Table Summary
iShares Core S&P 500 ETF
42.2%
iShares Core MSCI EAFE ETF
11.6
iShares MSCI EAFE ETF
10.2
iShares 0-1 Year Treasury Bond ETF
10.2
iShares 7-10 Year Treasury Bond ETF
9.3
iShares Russell 2000 ETF
7.1
iShares Core U.S. Aggregate Bond ETF
2.4
iShares iBoxx USD Investment Grade Corporate Bond ETF
1.9
iShares MSCI Japan ETF
1.3
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$39
0.75%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.75% [35],[36]
AssetsNet $ 322,558,954
Holdings Count | Holding 9
InvestmentCompanyPortfolioTurnover 31.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$322,558,954
Number of Portfolio Holdings
9
Portfolio Turnover Rate
31%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Equity Funds
49.3%
U.S. Fixed Income Funds
23.8
International Equity Funds
23.1
Other Investment Company
2.5
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)

Table Summary
iShares Core S&P 500 ETF
42.2%
iShares Core MSCI EAFE ETF
11.6
iShares MSCI EAFE ETF
10.2
iShares 0-1 Year Treasury Bond ETF
10.2
iShares 7-10 Year Treasury Bond ETF
9.3
iShares Russell 2000 ETF
7.1
iShares Core U.S. Aggregate Bond ETF
2.4
iShares iBoxx USD Investment Grade Corporate Bond ETF
1.9
iShares MSCI Japan ETF
1.3
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$25
0.48%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.48% [37],[38]
AssetsNet $ 794,570,026
Holdings Count | Holding 10
InvestmentCompanyPortfolioTurnover 20.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$794,570,026
Number of Portfolio Holdings
10
Portfolio Turnover Rate
20%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
47.3%
U.S. Equity Funds
34.4
International Equity Funds
17.9
Other Investment Company
7.5
Net Other Assets (Liabilities)Footnote Reference^
(7.1)
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)

Table Summary
iShares Core S&P 500 ETF
29.2%
iShares Core U.S. Aggregate Bond ETF
20.8
iShares MSCI EAFE ETF
15.5
iShares 0-1 Year Treasury Bond ETF
13.9
iShares 7-10 Year Treasury Bond ETF
8.8
iShares Russell 2000 ETF
5.2
iShares iBoxx USD Investment Grade Corporate Bond ETF
3.4
iShares MSCI Japan ETF
1.3
iShares Core MSCI EAFE ETF
1.1
iShares U.S. Treasury Bond ETF
0.4
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$37
0.73%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.73% [39],[40]
AssetsNet $ 794,570,026
Holdings Count | Holding 10
InvestmentCompanyPortfolioTurnover 20.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$794,570,026
Number of Portfolio Holdings
10
Portfolio Turnover Rate
20%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
47.3%
U.S. Equity Funds
34.4
International Equity Funds
17.9
Other Investment Company
7.5
Net Other Assets (Liabilities)Footnote Reference^
(7.1)
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)

Table Summary
iShares Core S&P 500 ETF
29.2%
iShares Core U.S. Aggregate Bond ETF
20.8
iShares MSCI EAFE ETF
15.5
iShares 0-1 Year Treasury Bond ETF
13.9
iShares 7-10 Year Treasury Bond ETF
8.8
iShares Russell 2000 ETF
5.2
iShares iBoxx USD Investment Grade Corporate Bond ETF
3.4
iShares MSCI Japan ETF
1.3
iShares Core MSCI EAFE ETF
1.1
iShares U.S. Treasury Bond ETF
0.4
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$38
0.74%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.74% [41],[42]
AssetsNet $ 593,954,712
Holdings Count | Holding 8
InvestmentCompanyPortfolioTurnover 15.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$593,954,712
Number of Portfolio Holdings
8
Portfolio Turnover Rate
15%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
49.2%
U.S. Equity Funds
33.8
International Equity Funds
16.8
Other Investment Company
2.7
Net Other Assets (Liabilities)Footnote Reference^
(2.5)
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)

Table Summary
iShares Core S&P 500 ETF
33.8%
iShares 7-10 Year Treasury Bond ETF
19.0
iShares Core U.S. Aggregate Bond ETF
16.0
iShares MSCI EAFE ETF
15.4
iShares 0-1 Year Treasury Bond ETF
11.7
iShares iBoxx USD Investment Grade Corporate Bond ETF
2.5
iShares MSCI Japan ETF
1.1
iShares Core MSCI EAFE ETF
0.3
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$39
0.75%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.75% [43],[44]
AssetsNet $ 277,187,685
Holdings Count | Holding 8
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$277,187,685
Number of Portfolio Holdings
8
Portfolio Turnover Rate
17%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Equity Funds
48.9%
U.S. Fixed Income Funds
29.2
International Equity Funds
21.7
Other Investment Company
1.5
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)

Table Summary
iShares Core S&P 500 ETF
48.9%
iShares Core MSCI EAFE ETF
13.2
iShares 0-1 Year Treasury Bond ETF
11.5
iShares 7-10 Year Treasury Bond ETF
8.8
iShares MSCI EAFE ETF
7.4
iShares Core U.S. Aggregate Bond ETF
7.4
iShares iBoxx USD Investment Grade Corporate Bond ETF
1.5
iShares MSCI Japan ETF
1.1
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$30
0.56%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.56% [45],[46]
AssetsNet $ 88,208,032
Holdings Count | Holding 7
InvestmentCompanyPortfolioTurnover 9.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$88,208,032
Number of Portfolio Holdings
7
Portfolio Turnover Rate
9%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Equity Funds
75.3%
International Equity Funds
24.7
Other Investment Company
0.1
Net Other Assets (Liabilities)Footnote Reference^
(0.1)
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Table Summary
iShares MSCI EAFE Min Vol Factor ETF
19.2%
iShares MSCI USA Momentum Factor ETF
16.8
iShares MSCI USA Value Factor ETF
16.3
iShares MSCI USA Quality Factor ETF
16.2
iShares MSCI USA Min Vol Factor ETF
16.1
iShares MSCI USA Size Factor ETF
9.9
iShares MSCI Emerging Markets Min Vol Factor ETF
5.5
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$16
0.31%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 16
Expense Ratio, Percent 0.31% [47],[48]
AssetsNet $ 193,977,905
Holdings Count | Holding 9
InvestmentCompanyPortfolioTurnover 5.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$193,977,905
Number of Portfolio Holdings
9
Portfolio Turnover Rate
5%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
59.2%
U.S. Equity Funds
30.9
International Equity Funds
9.9
Other Investment Company
5.0
Net Other Assets (Liabilities)Footnote Reference^
(5.0)
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)

Table Summary
iShares Core U.S. Aggregate Bond ETF
49.5%
iShares Broad USD Investment Grade Corporate Bond ETF
9.7
iShares MSCI EAFE Min Vol Factor ETF
7.4
iShares MSCI USA Momentum Factor ETF
6.9
iShares MSCI USA Quality Factor ETF
6.8
iShares MSCI USA Value Factor ETF
6.7
iShares MSCI USA Min Vol Factor ETF
6.2
iShares MSCI USA Size Factor ETF
4.2
iShares MSCI Emerging Markets Min Vol Factor ETF
2.5
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$29
0.56%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 29
Expense Ratio, Percent 0.56% [49],[50]
AssetsNet $ 193,977,905
Holdings Count | Holding 9
InvestmentCompanyPortfolioTurnover 5.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$193,977,905
Number of Portfolio Holdings
9
Portfolio Turnover Rate
5%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
59.2%
U.S. Equity Funds
30.9
International Equity Funds
9.9
Other Investment Company
5.0
Net Other Assets (Liabilities)Footnote Reference^
(5.0)
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)

Table Summary
iShares Core U.S. Aggregate Bond ETF
49.5%
iShares Broad USD Investment Grade Corporate Bond ETF
9.7
iShares MSCI EAFE Min Vol Factor ETF
7.4
iShares MSCI USA Momentum Factor ETF
6.9
iShares MSCI USA Quality Factor ETF
6.8
iShares MSCI USA Value Factor ETF
6.7
iShares MSCI USA Min Vol Factor ETF
6.2
iShares MSCI USA Size Factor ETF
4.2
iShares MSCI Emerging Markets Min Vol Factor ETF
2.5
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$28
0.54%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 28
Expense Ratio, Percent 0.54% [51],[52]
AssetsNet $ 410,562,444
Holdings Count | Holding 8
InvestmentCompanyPortfolioTurnover 6.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$410,562,444
Number of Portfolio Holdings
8
Portfolio Turnover Rate
6%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
49.5%
U.S. Equity Funds
38.1
International Equity Funds
12.3
Net Other Assets (Liabilities)Footnote Reference^
0.1
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Table Summary
iShares Core U.S. Aggregate Bond ETF
49.5%
iShares MSCI EAFE Min Vol Factor ETF
9.4
iShares MSCI USA Momentum Factor ETF
8.5
iShares MSCI USA Quality Factor ETF
8.4
iShares MSCI USA Value Factor ETF
8.2
iShares MSCI USA Min Vol Factor ETF
7.9
iShares MSCI USA Size Factor ETF
5.1
iShares MSCI Emerging Markets Min Vol Factor ETF
2.9
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$29
0.55%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 29
Expense Ratio, Percent 0.55% [53],[54]
AssetsNet $ 153,331,464
Holdings Count | Holding 8
InvestmentCompanyPortfolioTurnover 8.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$153,331,464
Number of Portfolio Holdings
8
Portfolio Turnover Rate
8%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Equity Funds
56.7%
U.S. Fixed Income Funds
24.8
International Equity Funds
18.6
Other Investment Company
0.4
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)

Table Summary
iShares Core U.S. Aggregate Bond ETF
24.7%
iShares MSCI EAFE Min Vol Factor ETF
14.5
iShares MSCI USA Momentum Factor ETF
12.7
iShares MSCI USA Value Factor ETF
12.3
iShares MSCI USA Quality Factor ETF
12.2
iShares MSCI USA Min Vol Factor ETF
12.1
iShares MSCI USA Size Factor ETF
7.4
iShares MSCI Emerging Markets Min Vol Factor ETF
4.2
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$24
0.47%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.47% [55],[56]
AssetsNet $ 301,723,285
Holdings Count | Holding 13
InvestmentCompanyPortfolioTurnover 20.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$301,723,285
Number of Portfolio Holdings
13
Portfolio Turnover Rate
20%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
49.3%
U.S. Equity Funds
30.5
International Equity Funds
19.9
Other Investment Company
0.2
Net Other Assets (Liabilities)Footnote Reference^
0.1
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Table Summary
iShares Core S&P Total U.S. Stock Market ETF
21.5%
iShares 0-1 Year Treasury Bond ETF
21.3
iShares Core U.S. Aggregate Bond ETF
17.9
iShares Core S&P 500 ETF
9.0
iShares Broad USD Investment Grade Corporate Bond ETF
6.1
iShares Core MSCI EAFE ETF
5.8
iShares MSCI EAFE ETF
5.3
iShares MSCI Emerging Markets ETF
3.5
iShares 7-10 Year Treasury Bond ETF
2.9
iShares Core MSCI Emerging Markets ETF
2.7
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$37
0.72%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.72% [57],[58]
AssetsNet $ 301,723,285
Holdings Count | Holding 13
InvestmentCompanyPortfolioTurnover 20.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$301,723,285
Number of Portfolio Holdings
13
Portfolio Turnover Rate
20%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
49.3%
U.S. Equity Funds
30.5
International Equity Funds
19.9
Other Investment Company
0.2
Net Other Assets (Liabilities)Footnote Reference^
0.1
Footnote Description
Footnote^
The Net Other Assets (Liabilities) category may include, but is not limited to, reverse repurchase agreements, forward foreign currency contracts, futures contracts, swap agreements, written options and swaptions, and cash collateral.
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Table Summary
iShares Core S&P Total U.S. Stock Market ETF
21.5%
iShares 0-1 Year Treasury Bond ETF
21.3
iShares Core U.S. Aggregate Bond ETF
17.9
iShares Core S&P 500 ETF
9.0
iShares Broad USD Investment Grade Corporate Bond ETF
6.1
iShares Core MSCI EAFE ETF
5.8
iShares MSCI EAFE ETF
5.3
iShares MSCI Emerging Markets ETF
3.5
iShares 7-10 Year Treasury Bond ETF
2.9
iShares Core MSCI Emerging Markets ETF
2.7
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$24
0.48%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.48% [59],[60]
AssetsNet $ 144,471,744
Holdings Count | Holding 13
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$144,471,744
Number of Portfolio Holdings
13
Portfolio Turnover Rate
17%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
64.1%
U.S. Equity Funds
20.7
International Equity Funds
14.5
Net Other Assets (Liabilities)Footnote Reference^
0.7
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)

Table Summary
iShares Core U.S. Aggregate Bond ETF
31.0%
iShares 0-1 Year Treasury Bond ETF
21.2
iShares Core S&P Total U.S. Stock Market ETF
16.0
iShares Broad USD Investment Grade Corporate Bond ETF
8.0
iShares Core S&P 500 ETF
4.7
iShares Core MSCI EAFE ETF
4.4
iShares MSCI EAFE ETF
3.5
iShares 7-10 Year Treasury Bond ETF
2.9
iShares Core MSCI Emerging Markets ETF
2.5
iShares MSCI Emerging Markets ETF
1.9
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$37
0.73%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.73% [61],[62]
AssetsNet $ 144,471,744
Holdings Count | Holding 13
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$144,471,744
Number of Portfolio Holdings
13
Portfolio Turnover Rate
17%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
64.1%
U.S. Equity Funds
20.7
International Equity Funds
14.5
Net Other Assets (Liabilities)Footnote Reference^
0.7
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)

Table Summary
iShares Core U.S. Aggregate Bond ETF
31.0%
iShares 0-1 Year Treasury Bond ETF
21.2
iShares Core S&P Total U.S. Stock Market ETF
16.0
iShares Broad USD Investment Grade Corporate Bond ETF
8.0
iShares Core S&P 500 ETF
4.7
iShares Core MSCI EAFE ETF
4.4
iShares MSCI EAFE ETF
3.5
iShares 7-10 Year Treasury Bond ETF
2.9
iShares Core MSCI Emerging Markets ETF
2.5
iShares MSCI Emerging Markets ETF
1.9
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$26
0.51%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.51% [63],[64]
AssetsNet $ 233,405,251
Holdings Count | Holding 12
InvestmentCompanyPortfolioTurnover 19.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$233,405,251
Number of Portfolio Holdings
12
Portfolio Turnover Rate
19%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Equity Funds
43.0%
U.S. Fixed Income Funds
29.0
International Equity Funds
27.4
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)

Table Summary
iShares Core S&P Total U.S. Stock Market ETF
27.6%
iShares 0-1 Year Treasury Bond ETF
20.8
iShares Core S&P 500 ETF
15.4
iShares Core MSCI EAFE ETF
7.9
iShares MSCI EAFE ETF
7.6
iShares Core U.S. Aggregate Bond ETF
4.8
iShares Core MSCI Emerging Markets ETF
4.7
iShares MSCI Emerging Markets ETF
3.9
iShares 7-10 Year Treasury Bond ETF
2.9
iShares MSCI Canada ETF
2.2
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$39
0.76%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.76% [65],[66]
AssetsNet $ 233,405,251
Holdings Count | Holding 12
InvestmentCompanyPortfolioTurnover 19.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$233,405,251
Number of Portfolio Holdings
12
Portfolio Turnover Rate
19%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Equity Funds
43.0%
U.S. Fixed Income Funds
29.0
International Equity Funds
27.4
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)

Table Summary
iShares Core S&P Total U.S. Stock Market ETF
27.6%
iShares 0-1 Year Treasury Bond ETF
20.8
iShares Core S&P 500 ETF
15.4
iShares Core MSCI EAFE ETF
7.9
iShares MSCI EAFE ETF
7.6
iShares Core U.S. Aggregate Bond ETF
4.8
iShares Core MSCI Emerging Markets ETF
4.7
iShares MSCI Emerging Markets ETF
3.9
iShares 7-10 Year Treasury Bond ETF
2.9
iShares MSCI Canada ETF
2.2
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$47
0.90%Footnote Reference*Footnote Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.90% [67],[68]
AssetsNet $ 208,606,300
Holdings Count | Holding 73
InvestmentCompanyPortfolioTurnover 52.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$208,606,300
Number of Portfolio Holdings
73
Portfolio Turnover Rate
52%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
Common Stocks
 
Real Estate
95.0%
 
Information Technology
1.0
 
Consumer Discretionary
0.7
Other Investment Company
1.7
Net Other Assets (Liabilities)Footnote Reference^
1.6
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)

Table Summary
Equinix, Inc., REIT
6.3%
Welltower, Inc., REIT
6.2
Prologis, Inc., REIT
5.5
Public Storage, REIT
3.0
WP Carey, Inc., REIT
2.9
Equity Residential, REIT
2.9
Iron Mountain, Inc., REIT
2.7
Mitsui Fudosan Co. Ltd.
2.6
Goodman Group, REIT
2.6
American Healthcare Inc., REIT
2.1
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$60
1.15%Footnote Reference*Footnote Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 60
Expense Ratio, Percent 1.15% [69],[70]
AssetsNet $ 208,606,300
Holdings Count | Holding 73
InvestmentCompanyPortfolioTurnover 52.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$208,606,300
Number of Portfolio Holdings
73
Portfolio Turnover Rate
52%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
Common Stocks
 
Real Estate
95.0%
 
Information Technology
1.0
 
Consumer Discretionary
0.7
Other Investment Company
1.7
Net Other Assets (Liabilities)Footnote Reference^
1.6
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)

Table Summary
Equinix, Inc., REIT
6.3%
Welltower, Inc., REIT
6.2
Prologis, Inc., REIT
5.5
Public Storage, REIT
3.0
WP Carey, Inc., REIT
2.9
Equity Residential, REIT
2.9
Iron Mountain, Inc., REIT
2.7
Mitsui Fudosan Co. Ltd.
2.6
Goodman Group, REIT
2.6
American Healthcare Inc., REIT
2.1
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$9
0.17%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.17% [71],[72]
AssetsNet $ 736,636,668
Holdings Count | Holding 18
InvestmentCompanyPortfolioTurnover 39.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$736,636,668
Number of Portfolio Holdings
18
Portfolio Turnover Rate
39%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Equity Funds
49.5%
U.S. Fixed Income Funds
35.7
International Equity Funds
14.5
Other Investment Company
0.0Footnote Reference*
International Alternative Funds
0.0Footnote Reference*
Net Other Assets (Liabilities)Footnote Reference^
0.3
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)

Table Summary
Transamerica Aegon Core Bond VP, Initial Class
28.3%
Transamerica JPMorgan Enhanced Index VP, Initial Class
19.6
Transamerica WMC US Growth VP, Initial Class
13.0
Transamerica Large Cap Value, Class I2
12.2
Transamerica TSW International Equity VP, Initial Class
9.7
Transamerica Short-Term Bond, Class I2
5.5
Transamerica International Focus VP, Initial Class
3.2
Transamerica Small Cap Value, Class I2
1.6
Transamerica Small Cap Growth, Class I2
1.6
WisdomTree Japan Hedged Equity Fund
1.5
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$21
0.42%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 21
Expense Ratio, Percent 0.42% [73],[74]
AssetsNet $ 736,636,668
Holdings Count | Holding 18
InvestmentCompanyPortfolioTurnover 39.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$736,636,668
Number of Portfolio Holdings
18
Portfolio Turnover Rate
39%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Equity Funds
49.5%
U.S. Fixed Income Funds
35.7
International Equity Funds
14.5
Other Investment Company
0.0Footnote Reference*
International Alternative Funds
0.0Footnote Reference*
Net Other Assets (Liabilities)Footnote Reference^
0.3
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)

Table Summary
Transamerica Aegon Core Bond VP, Initial Class
28.3%
Transamerica JPMorgan Enhanced Index VP, Initial Class
19.6
Transamerica WMC US Growth VP, Initial Class
13.0
Transamerica Large Cap Value, Class I2
12.2
Transamerica TSW International Equity VP, Initial Class
9.7
Transamerica Short-Term Bond, Class I2
5.5
Transamerica International Focus VP, Initial Class
3.2
Transamerica Small Cap Value, Class I2
1.6
Transamerica Small Cap Growth, Class I2
1.6
WisdomTree Japan Hedged Equity Fund
1.5
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$27
0.53%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 27
Expense Ratio, Percent 0.53% [75],[76]
AssetsNet $ 17,651,402
Holdings Count | Holding 13
InvestmentCompanyPortfolioTurnover 9.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$17,651,402
Number of Portfolio Holdings
13
Portfolio Turnover Rate
9%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Equity Funds
49.2%
U.S. Fixed Income Funds
29.1
International Equity Funds
21.2
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)

Table Summary
Transamerica WMC US Growth VP, Initial Class
24.2%
Transamerica Large Cap Value, Class I2
20.1
Transamerica Core Bond, Class I2
16.0
Transamerica International Stock, Class I2
9.1
Transamerica International Equity, Class I2
7.9
Transamerica Bond, Class I2
7.3
Transamerica Aegon Core Bond VP, Initial Class
4.8
Transamerica Aegon Sustainable Equity Income VP, Initial Class
2.5
Transamerica Emerging Markets Equity, Class I2
2.1
Transamerica TSW International Equity VP, Initial Class
2.1
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$17
0.33%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 17
Expense Ratio, Percent 0.33% [77],[78]
AssetsNet $ 3,385,286,151
Holdings Count | Holding 13
InvestmentCompanyPortfolioTurnover 8.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$3,385,286,151
Number of Portfolio Holdings
13
Portfolio Turnover Rate
8%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
47.1%
U.S. Equity Funds
36.4
International Equity Funds
15.9
Other Investment Company
4.8
Net Other Assets (Liabilities)Footnote Reference^
(4.2)
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)

Table Summary
Vanguard Total Bond Market ETF
20.2%
iShares Core U.S. Aggregate Bond ETF
19.9
Vanguard S&P 500 ETF
15.8
iShares Core S&P 500 ETF
10.7
Vanguard Intermediate-Term Corporate Bond ETF
7.0
Vanguard FTSE Developed Markets ETF
5.1
State Street SPDR S&P 500 ETF Trust
4.8
iShares Core MSCI Emerging Markets ETF
4.8
iShares Core MSCI EAFE ETF
4.2
iShares Core S&P Mid-Cap ETF
2.8
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$30
0.58%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.58% [79],[80]
AssetsNet $ 3,385,286,151
Holdings Count | Holding 13
InvestmentCompanyPortfolioTurnover 8.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$3,385,286,151
Number of Portfolio Holdings
13
Portfolio Turnover Rate
8%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
47.1%
U.S. Equity Funds
36.4
International Equity Funds
15.9
Other Investment Company
4.8
Net Other Assets (Liabilities)Footnote Reference^
(4.2)
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)

Table Summary
Vanguard Total Bond Market ETF
20.2%
iShares Core U.S. Aggregate Bond ETF
19.9
Vanguard S&P 500 ETF
15.8
iShares Core S&P 500 ETF
10.7
Vanguard Intermediate-Term Corporate Bond ETF
7.0
Vanguard FTSE Developed Markets ETF
5.1
State Street SPDR S&P 500 ETF Trust
4.8
iShares Core MSCI Emerging Markets ETF
4.8
iShares Core MSCI EAFE ETF
4.2
iShares Core S&P Mid-Cap ETF
2.8
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$18
0.36%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 18
Expense Ratio, Percent 0.36% [81],[82]
AssetsNet $ 365,949,790
Holdings Count | Holding 14
InvestmentCompanyPortfolioTurnover 6.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$365,949,790
Number of Portfolio Holdings
14
Portfolio Turnover Rate
6%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
62.4%
U.S. Equity Funds
26.2
International Equity Funds
10.9
Other Investment Company
3.4
Net Other Assets (Liabilities)Footnote Reference^
(2.9)
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)

Table Summary
Schwab U.S. Aggregate Bond ETF
19.4%
Vanguard Total Bond Market ETF
19.3
iShares Core U.S. Aggregate Bond ETF
19.2
Vanguard S&P 500 ETF
7.4
State Street SPDR S&P 500 ETF Trust
7.4
iShares Core S&P 500 ETF
7.4
Vanguard Intermediate-Term Corporate Bond ETF
4.5
iShares Core MSCI Emerging Markets ETF
3.1
Vanguard FTSE Developed Markets ETF
2.9
iShares Core MSCI EAFE ETF
2.6
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$31
0.61%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.61% [83],[84]
AssetsNet $ 365,949,790
Holdings Count | Holding 14
InvestmentCompanyPortfolioTurnover 6.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$365,949,790
Number of Portfolio Holdings
14
Portfolio Turnover Rate
6%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Fixed Income Funds
62.4%
U.S. Equity Funds
26.2
International Equity Funds
10.9
Other Investment Company
3.4
Net Other Assets (Liabilities)Footnote Reference^
(2.9)
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)

Table Summary
Schwab U.S. Aggregate Bond ETF
19.4%
Vanguard Total Bond Market ETF
19.3
iShares Core U.S. Aggregate Bond ETF
19.2
Vanguard S&P 500 ETF
7.4
State Street SPDR S&P 500 ETF Trust
7.4
iShares Core S&P 500 ETF
7.4
Vanguard Intermediate-Term Corporate Bond ETF
4.5
iShares Core MSCI Emerging Markets ETF
3.1
Vanguard FTSE Developed Markets ETF
2.9
iShares Core MSCI EAFE ETF
2.6
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$17
0.33%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 17
Expense Ratio, Percent 0.33% [85],[86]
AssetsNet $ 1,668,617,394
Holdings Count | Holding 13
InvestmentCompanyPortfolioTurnover 5.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$1,668,617,394
Number of Portfolio Holdings
13
Portfolio Turnover Rate
5%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Equity Funds
54.9%
International Equity Funds
23.6
U.S. Fixed Income Funds
20.8
Other Investment Company
2.9
Net Other Assets (Liabilities)Footnote Reference^
(2.2)
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)

Table Summary
Vanguard S&P 500 ETF
19.2%
iShares Core S&P 500 ETF
17.4
State Street SPDR S&P 500 ETF Trust
10.4
Vanguard Total Bond Market ETF
7.5
iShares Core U.S. Aggregate Bond ETF
7.4
iShares Core MSCI Emerging Markets ETF
6.9
Vanguard Intermediate-Term Corporate Bond ETF
5.9
Vanguard FTSE Developed Markets ETF
5.6
iShares Core MSCI EAFE ETF
5.5
iShares MSCI EAFE ETF
5.5
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$30
0.58%Footnote ReferenceFootnote Reference
Footnote Description
Footnote*
Does not include expenses of the underlying investments in which the Portfolio invests.
Footnote
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.58% [87],[88]
AssetsNet $ 1,668,617,394
Holdings Count | Holding 13
InvestmentCompanyPortfolioTurnover 5.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$1,668,617,394
Number of Portfolio Holdings
13
Portfolio Turnover Rate
5%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
U.S. Equity Funds
54.9%
International Equity Funds
23.6
U.S. Fixed Income Funds
20.8
Other Investment Company
2.9
Net Other Assets (Liabilities)Footnote Reference^
(2.2)
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)

Table Summary
Vanguard S&P 500 ETF
19.2%
iShares Core S&P 500 ETF
17.4
State Street SPDR S&P 500 ETF Trust
10.4
Vanguard Total Bond Market ETF
7.5
iShares Core U.S. Aggregate Bond ETF
7.4
iShares Core MSCI Emerging Markets ETF
6.9
Vanguard Intermediate-Term Corporate Bond ETF
5.9
Vanguard FTSE Developed Markets ETF
5.6
iShares Core MSCI EAFE ETF
5.5
iShares MSCI EAFE ETF
5.5
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$48
0.92%Footnote Reference*Footnote Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 48
Expense Ratio, Percent 0.92% [89],[90]
AssetsNet $ 87,953,202
Holdings Count | Holding 45
InvestmentCompanyPortfolioTurnover 15.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$87,953,202
Number of Portfolio Holdings
45
Portfolio Turnover Rate
15%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
Common Stocks
 
Industrials
17.9%
 
Financials
17.4
 
Information Technology
14.0
 
Consumer Discretionary
12.2
 
Health Care
10.8
 
Communication Services
7.2
 
Materials
6.0
 
Energy
4.9
 
Consumer Staples
3.0
 
Real Estate
2.6
 
Utilities
2.5
Net Other Assets (Liabilities)Footnote Reference^
1.5
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)

Table Summary
Amazon.com, Inc.
6.3%
Apple, Inc.
5.3
Microsoft Corp.
4.2
JPMorgan Chase & Co.
3.7
Exxon Mobil Corp.
3.3
RTX Corp.
2.8
Wells Fargo & Co.
2.7
Quanta Services, Inc.
2.7
Linde PLC
2.6
Parker-Hannifin Corp.
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Initial Class
$43
0.83%Footnote Reference*,Footnote Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.83% [91],[92]
AssetsNet $ 288,751,259
Holdings Count | Holding 31
InvestmentCompanyPortfolioTurnover 30.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$288,751,259
Number of Portfolio Holdings
31
Portfolio Turnover Rate
30%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
Common Stocks
 
Information Technology
27.5%
 
Industrials
20.7
 
Consumer Discretionary
12.5
 
Consumer Staples
11.0
 
Health Care
8.6
 
Financials
7.7
 
Communication Services
5.0
 
Materials
3.8
Net Other Assets (Liabilities)Footnote Reference^
3.2
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.

Top Country Allocation (Percentage of Net Assets)

Table Summary
Japan
22.0%
Canada
9.8
France
8.4
United Kingdom
7.5
Taiwan
7.5
Switzerland
7.5
United States
6.5
Republic of Korea
6.4
Netherlands
6.1
Germany
4.3
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd., ADR
7.5%
SK Hynix, Inc.
6.4
Safran SA
5.4
Ajinomoto Co., Inc.
5.4
ASML Holding NV
4.0
Hoya Corp.
3.8
Linde PLC
3.8
Keyence Corp.
3.8
ITOCHU Corp.
3.6
Compass Group PLC
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, 2026 to June 30, 2026.
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)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$55
1.08%Footnote Reference*,Footnote Reference
Footnote Description
Footnote*
Annualized
Footnote
This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
Expenses Paid, Amount $ 55
Expense Ratio, Percent 1.08% [93],[94]
AssetsNet $ 288,751,259
Holdings Count | Holding 31
InvestmentCompanyPortfolioTurnover 30.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Total Net Assets
$288,751,259
Number of Portfolio Holdings
31
Portfolio Turnover Rate
30%
Holdings [Text Block]

Asset Allocation (Percentage of Net Assets)

Table Summary
Common Stocks
 
Information Technology
27.5%
 
Industrials
20.7
 
Consumer Discretionary
12.5
 
Consumer Staples
11.0
 
Health Care
8.6
 
Financials
7.7
 
Communication Services
5.0
 
Materials
3.8
Net Other Assets (Liabilities)Footnote Reference^
3.2
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.

Top Country Allocation (Percentage of Net Assets)

Table Summary
Japan
22.0%
Canada
9.8
France
8.4
United Kingdom
7.5
Taiwan
7.5
Switzerland
7.5
United States
6.5
Republic of Korea
6.4
Netherlands
6.1
Germany
4.3
Largest Holdings [Text Block]

Top Holdings (Percentage of Net Assets)

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd., ADR
7.5%
SK Hynix, Inc.
6.4
Safran SA
5.4
Ajinomoto Co., Inc.
5.4
ASML Holding NV
4.0
Hoya Corp.
3.8
Linde PLC
3.8
Keyence Corp.
3.8
ITOCHU Corp.
3.6
Compass Group PLC
3.5
Updated Prospectus Web Address transamerica.com/annuities/prospectus
[1] Annualized
[2] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[3] Annualized
[4] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[5] Annualized
[6] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[7] Annualized
[8] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[9] Annualized
[10] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[11] Annualized
[12] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[13] Annualized
[14] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[15] Annualized
[16] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[17] Annualized
[18] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[19] Annualized
[20] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[21] Annualized
[22] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[23] Annualized
[24] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[25] Annualized
[26] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[27] Annualized
[28] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[29] Annualized
[30] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[31] Annualized
[32] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[33] Annualized
[34] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[35] Annualized
[36] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[37] Annualized
[38] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[39] Annualized
[40] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[41] Annualized
[42] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[43] Annualized
[44] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[45] Annualized
[46] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[47] Annualized
[48] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[49] Annualized
[50] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[51] Annualized
[52] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[53] Annualized
[54] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[55] Annualized
[56] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[57] Annualized
[58] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[59] Annualized
[60] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[61] Annualized
[62] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[63] Annualized
[64] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[65] Annualized
[66] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[67] Annualized
[68] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[69] Annualized
[70] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[71] Annualized
[72] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[73] Annualized
[74] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[75] Annualized
[76] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[77] Annualized
[78] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[79] Annualized
[80] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[81] Annualized
[82] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[83] Annualized
[84] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[85] Annualized
[86] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[87] Annualized
[88] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[89] Annualized
[90] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[91] Annualized
[92] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.
[93] Annualized
[94] This table does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, expenses would be higher.