The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the Virtus Duff & Phelps Real Estate Securities Series. The table does not include any fees or sales charges imposed under the variable contracts for which the Series is an investment option. If they were included, your costs would be higher.

Shareholder Fees - USD ($)	Class A Shares	Class I Shares
Virtus Duff & Phelps Real Estate Securities Series \| Shareholder Fee, Other	$ 0	$ 0

Annual Fund Operating Expenses [Table]

Annual Fund Operating Expenses - Virtus Duff & Phelps Real Estate Securities Series		Class A Shares	Class I Shares
Management Fees (as a percentage of Assets)		0.75%	0.75%
Distribution and Service (12b-1) Fees		0.25%	0.00%
Other Expenses (as a percentage of Assets):		0.19%	0.19%
Expenses (as a percentage of Assets)		1.19%	0.94%
Fee Waiver or Reimbursement	^[1]	(0.09%)	(0.09%)
Net Expenses (as a percentage of Assets)	^[1]	1.10%	0.85%

[1]

The Series’ investment adviser has contractually agreed to limit the Series’ total annual operating expenses (excluding certain expenses, such as front-end sales charges, taxes, leverage and borrowing expenses (such as commitment, amendment and renewal expenses on credit or redemption facilities), interest, brokerage commissions, expenses incurred in connection with any merger or reorganization, unusual or infrequently occurring expenses (such as litigation), acquired fund fees and expenses, and dividend expenses, if any) so that such expenses do not exceed 1.10% for Class A Shares and 0.85% for Class I Shares through April 30, 2027. Prior to April 30, 2027, only the Series' Board may modify or terminate the expense limitation agreement. Following the contractual period, the adviser may discontinue these expense reimbursement arrangements at any time. The adviser may recapture operating expenses reimbursed and/or fees waived under these arrangements for a period of three years following the date such waiver or reimbursement occurred, provided that the recapture does not cause the Series to exceed its expense limit in effect at the time of the waiver or reimbursement, and any in effect at the time of recapture, after repayment is taken into account.

Expense Example Narrative [Text Block]

This example is intended to help you compare the cost of investing in the Series with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Series for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year, that the Series’ total operating expenses remain the same and that the expense reimbursement arrangement remains in place for the contractual period. The example does not reflect variable contract fees and charges, and if it did, the costs shown would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]

Expense Example - Virtus Duff & Phelps Real Estate Securities Series - USD ($)	Class A Shares	Class I Shares
Expense Example, with Redemption, 1 Year	$ 112	$ 87
Expense Example, with Redemption, 3 Years	369	291
Expense Example, with Redemption, 5 Years	646	511
Expense Example, with Redemption, 10 Years	$ 1,435	$ 1,146

Portfolio Turnover [Text Block]

The Series pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Series Operating Expenses or in the Example, affect the Series’ performance. During the most recent fiscal year, the Series’ portfolio turnover rate was 22% of the average value of its portfolio.

Expense Heading [Optional Text]

Fees and Expenses

Shareholder Fees Caption [Optional Text]

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Optional Text]

Annual Series Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

Example

Expense Example by, Year, Caption [Text]

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover [Heading]

Portfolio Turnover

Portfolio Turnover, Rate

14.00%

Prospectus [Line Items]

Expense Narrative [Text Block]

The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the Virtus KAR Equity Income Series. The table does not include any fees or sales charges imposed under the variable contracts for which the Series is an investment option. If they were included, your costs would be higher.

Shareholder Fees [Table]

Shareholder Fees	Class A Shares USD ($)
Virtus KAR Equity Income Series \| Shareholder Fee, Other	$ 0

Annual Fund Operating Expenses [Table]

Annual Fund Operating Expenses - Virtus KAR Equity Income Series	Class A Shares
Management Fees (as a percentage of Assets)	0.70%
Distribution and Service (12b-1) Fees	0.25%
Other Expenses (as a percentage of Assets):	0.21%
Expenses (as a percentage of Assets)	1.16%
Fee Waiver or Reimbursement	(0.18%)	^[1]
Net Expenses (as a percentage of Assets)	0.98%	^[1]

[1]

The Series’ investment adviser has contractually agreed to limit the Series’ total annual operating expenses (excluding certain expenses, such as front-end sales charges, taxes, leverage and borrowing expenses (such as commitment, amendment and renewal expenses on credit or redemption facilities), interest, brokerage commissions, expenses incurred in connection with any merger or reorganization, unusual or infrequently occurring expenses (such as litigation), acquired fund fees and expenses, and dividend expenses, if any) so that such expenses do not exceed 0.98% through April 30, 2027. Prior to April 30, 2027, only the Series' Board may modify or terminate the expense limitation agreement. Following the contractual period, the adviser may discontinue these expense reimbursement arrangements at any time. The adviser may recapture operating expenses reimbursed and/or fees waived under these arrangements for a period of three years following the date such waiver or reimbursement occurred, provided that the recapture does not cause the Series to exceed its expense limit in effect at the time of the waiver or reimbursement, and any in effect at the time of recapture, after repayment is taken into account.

Expense Example Narrative [Text Block]

This example is intended to help you compare the cost of investing in the Series with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Series for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year, that the Series’ total operating expenses remain the same and that the expense reimbursement arrangement remains in place for the contractual period. The example does not reflect variable contract fees and charges, and if it did, the costs shown would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]

Expense Example - Virtus KAR Equity Income Series	Class A Shares USD ($)
Expense Example, with Redemption, 1 Year	$ 100
Expense Example, with Redemption, 3 Years	351
Expense Example, with Redemption, 5 Years	621
Expense Example, with Redemption, 10 Years	$ 1,393

Portfolio Turnover [Text Block]

The Series pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Series Operating Expenses or in the Example, affect the Series’ performance. During the most recent fiscal year, the Series’ portfolio turnover rate was 24% of the average value of its portfolio.

Expense Heading [Optional Text]

Fees and Expenses

Shareholder Fees Caption [Optional Text]

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Optional Text]

Annual Series Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

Example

Expense Example by, Year, Caption [Text]

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover [Heading]

Portfolio Turnover

Portfolio Turnover, Rate

33.00%

Prospectus [Line Items]

Expense Narrative [Text Block]

The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the Virtus KAR Small-Cap Value Series. The table does not include any fees or sales charges imposed under the variable contracts for which the Series is an investment option. If they were included, your costs would be higher.

Shareholder Fees [Table]

Shareholder Fees	Class A Shares USD ($)
Virtus KAR Small-Cap Value Series \| Shareholder Fee, Other	$ 0

Annual Fund Operating Expenses [Table]

Annual Fund Operating Expenses - Virtus KAR Small-Cap Value Series	Class A Shares
Management Fees (as a percentage of Assets)	0.90%
Distribution and Service (12b-1) Fees	0.25%
Other Expenses (as a percentage of Assets):	0.23%
Expenses (as a percentage of Assets)	1.38%
Fee Waiver or Reimbursement	(0.28%)	^[1]
Net Expenses (as a percentage of Assets)	1.10%	^[1]

[1]

The Series’ investment adviser has contractually agreed to limit the Series’ total annual operating expenses (excluding certain expenses, such as front-end sales charges, taxes, leverage and borrowing expenses (such as commitment, amendment and renewal expenses on credit or redemption facilities), interest, brokerage commissions, expenses incurred in connection with any merger or reorganization, unusual or infrequently occurring expenses (such as litigation), acquired fund fees and expenses, and dividend expenses, if any) so that such expenses do not exceed 1.10% through April 30, 2027. Prior to April 30, 2027, only the Series' Board may modify or terminate the expense limitation agreement. Following the contractual period, the adviser may discontinue these expense reimbursement arrangements at any time. The adviser may recapture operating expenses reimbursed and/or fees waived under these arrangements for a period of three years following the date such waiver or reimbursement occurred, provided that the recapture does not cause the Series to exceed its expense limit in effect at the time of the waiver or reimbursement, and any in effect at the time of recapture, after repayment is taken into account.

Expense Example Narrative [Text Block]

This example is intended to help you compare the cost of investing in the Series with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Series for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year, that the Series’ total operating expenses remain the same and that the expense reimbursement arrangement remains in place for the contractual period. The example does not reflect variable contract fees and charges, and if it did, the costs shown would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]

Expense Example - Virtus KAR Small-Cap Value Series	Class A Shares USD ($)
Expense Example, with Redemption, 1 Year	$ 112
Expense Example, with Redemption, 3 Years	409
Expense Example, with Redemption, 5 Years	729
Expense Example, with Redemption, 10 Years	$ 1,633

Portfolio Turnover [Text Block]

The Series pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Series Operating Expenses or in the Example, affect the Series’ performance. During the most recent fiscal year, the Series’ portfolio turnover rate was 9% of the average value of its portfolio.

Expense Heading [Optional Text]

Fees and Expenses

Shareholder Fees Caption [Optional Text]

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Optional Text]

Annual Series Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

Example

Expense Example by, Year, Caption [Text]

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover [Heading]

Portfolio Turnover

Portfolio Turnover, Rate

59.00%

Prospectus [Line Items]

Expense Narrative [Text Block]

The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the Virtus SGA International Growth Series. The table does not include any fees or sales charges imposed under the variable contracts for which the Series is an investment option. If they were included, your costs would be higher.

Shareholder Fees [Table]

Shareholder Fees - USD ($)	Class A Shares	Class I Shares
Virtus SGA International Growth Series \| Shareholder Fee, Other	$ 0	$ 0

Annual Fund Operating Expenses [Table]

Annual Fund Operating Expenses - Virtus SGA International Growth Series		Class A Shares	Class I Shares
Management Fees (as a percentage of Assets)		0.75%	0.75%
Distribution and Service (12b-1) Fees		0.25%	0.00%
Other Expenses (as a percentage of Assets):		0.21%	0.21%
Expenses (as a percentage of Assets)		1.21%	0.96%
Fee Waiver or Reimbursement	^[1]	(0.11%)	(0.11%)
Net Expenses (as a percentage of Assets)	^[1]	1.10%	0.85%

[1]

The Series’ investment adviser has contractually agreed to limit the Series’ total annual operating expenses (excluding certain expenses, such as front-end sales charges, taxes, leverage and borrowing expenses (such as commitment, amendment and renewal expenses on credit or redemption facilities), interest, brokerage commissions, expenses incurred in connection with any merger or reorganization, unusual or infrequently occurring expenses (such as litigation), acquired fund fees and expenses, and dividend expenses, if any) so that such expenses do not exceed 1.10% for Class A Shares and 0.85% for Class I Shares through April 30, 2027. Prior to April 30, 2027, only the Series' Board may modify or terminate the expense limitation agreement. Following the contractual period, the adviser may discontinue these expense reimbursement arrangements at any time. The adviser may recapture operating expenses reimbursed and/or fees waived under these arrangements for a period of three years following the date such waiver or reimbursement occurred, provided that the recapture does not cause the Series to exceed its expense limit in effect at the time of the waiver or reimbursement, and any in effect at the time of recapture, after repayment is taken into account.

Expense Example Narrative [Text Block]

This example is intended to help you compare the cost of investing in the Series with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Series for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year, that the Series’ total operating expenses remain the same and that the expense reimbursement arrangement remains in place for the contractual period. The example does not reflect variable contract fees and charges, and if it did, the costs shown would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]

Expense Example - Virtus SGA International Growth Series - USD ($)	Class A Shares	Class I Shares
Expense Example, with Redemption, 1 Year	$ 112	$ 87
Expense Example, with Redemption, 3 Years	373	295
Expense Example, with Redemption, 5 Years	654	520
Expense Example, with Redemption, 10 Years	$ 1,456	$ 1,168

Portfolio Turnover [Text Block]

The Series pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Series Operating Expenses or in the Example, affect the Series’ performance. During the most recent fiscal year, the Series’ portfolio turnover rate was 27% of the average value of its portfolio.

Expense Heading [Optional Text]

Fees and Expenses

Shareholder Fees Caption [Optional Text]

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Optional Text]

Annual Series Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

Example

Expense Example by, Year, Caption [Text]

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover [Heading]

Portfolio Turnover

Portfolio Turnover, Rate

48.00%