Fees and Expenses |
May 01, 2026 |
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| Royce Capital Fund - Micro-Cap Portfolio | ||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||||||||||
| Expense Heading [Optional Text] | Fees and Expenses of the Fund | |||||||||||||||||||||||||||||||||||
| Expense Narrative [Text Block] | The following table presents the fees and expenses that you may pay if you buy and hold shares of the Fund. The table does not include variable contract or other potential charges. Because variable contract or other potential charges are not included, the total fees and expenses that you will incur will be higher than the fees and expenses set forth in the table. See your variable contract prospectus for more information about variable contract charges. |
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| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) | |||||||||||||||||||||||||||||||||||
| Shareholder Fees [Table] |
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| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) | |||||||||||||||||||||||||||||||||||
| Annual Fund Operating Expenses [Table] |
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| Expense Example [Heading] | Example | |||||||||||||||||||||||||||||||||||
| Expense Example Narrative [Text Block] | This
example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The
example assumes that you invest $10,000 in the Fund 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 and that the Fund’s total
operating expenses remain the same. Although your actual costs may be higher or lower, based on the assumptions your costs
would be:
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| Expense Example, With Redemption [Table] |
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| Portfolio Turnover [Heading] | Portfolio Turnover | |||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Text Block] | The Fund 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 total annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 42% of the average value of its portfolio. |
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| Portfolio Turnover, Rate | 42.00% | |||||||||||||||||||||||||||||||||||
| Royce Capital Fund - Small-Cap Portfolio | ||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||||||||||
| Expense Heading [Optional Text] | Fees and Expenses of the Fund | |||||||||||||||||||||||||||||||||||
| Expense Narrative [Text Block] | The following table presents the fees and expenses that you may pay if you buy and hold shares of the Fund. The table does not include variable contract or other potential charges. Because variable contract or other potential charges are not included, the total fees and expenses that you will incur will be higher than the fees and expenses set forth in the table. See your variable contract prospectus for more information about variable contract charges. |
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| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) | |||||||||||||||||||||||||||||||||||
| Shareholder Fees [Table] |
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| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) | |||||||||||||||||||||||||||||||||||
| Annual Fund Operating Expenses [Table] |
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| Expense Example [Heading] | Example | |||||||||||||||||||||||||||||||||||
| Expense Example Narrative [Text Block] | This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.
The example assumes that you invest $10,000 in the Fund 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 and that the Fund’s total operating expenses remain the same. Although your actual costs may be higher or lower, based on the assumptions your costs would be: |
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| Expense Example, With Redemption [Table] |
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| Portfolio Turnover [Heading] | Portfolio Turnover | |||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Text Block] | The Fund 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 total annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 79% of the average value of its portfolio. |
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| Portfolio Turnover, Rate | 79.00% | |||||||||||||||||||||||||||||||||||