Large Cap Core Fund Performance Management - Large Cap Core Fund |
May 31, 2026 |
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| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | <span style="color:#000000;font-family:Arial;font-size:12pt;font-weight:bold;">Performance Information</span> |
| Performance Narrative [Text Block] | The below bar chart and table illustrate the risks of investing in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and comparing the Fund’s average annual returns to those of the S&P 500® Index (a broad-based securities market index) and the Russell 1000® Growth Index. The Fund’s returns prior to September 29, 2025, as reflected in the bar chart and table, are the returns of the Fund when it followed different investment strategies. under the name “Large Capital Growth Fund.” Fees and expenses incurred at the contract level are not reflected in the bar chart or table. If these amounts were reflected, returns would be less than those shown. Of course, past performance of the Fund is not necessarily an indication of how the Fund will perform in the future.T. Rowe Price Associates, Inc. (“T. Rowe Price”) and J.P. Morgan Investment Management Inc. (“JPMIM”) assumed subadvisory duties on September 29, 2025. From September 16, 2013, through September 28, 2025, Massachusetts Financial Services Company was subadviser to the Fund. The percentage of the Fund’s assets that each subadviser manages may, at the adviser’s discretion, change from time to time. |
| Performance Past Does Not Indicate Future [Text] | <span style="font-family:Arial;font-size:10pt;">Of course, past performance of </span><span style="font-family:Arial;font-size:10pt;margin-left:0%;">the Fund is not necessarily an indication of how the Fund </span><span style="font-family:Arial;font-size:10pt;">will perform in the future.</span> |
| Performance Information Illustrates Variability of Returns [Text] | <span style="font-family:Arial;font-size:10pt;margin-left:0%;">The below bar chart and table illustrate the risks of investing in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and comparing the Fund’s average annual returns to those of the S&P 500® Index (a broad-based securities market index) and the Russell 1000® Growth Index. </span><span style="font-family:Arial;font-size:10pt;">The Fund’s </span><span style="font-family:Arial;font-size:10pt;margin-left:0%;">returns prior to September 29, 2025, as reflected in the bar chart and table, are the returns of the Fund when it followed different investment strategies. under the name “Large Capital Growth Fund.”</span> |
| Bar Chart Does Not Reflect Sales Loads [Text] | <span style="font-family:Arial;font-size:10pt;"> Fees and expenses incurred </span><span style="font-family:Arial;font-size:10pt;margin-left:0%;">at the contract level are not reflected in the bar chart or table. If these amounts were reflected, returns would be less than those shown. </span> |
| Bar Chart Closing [Text Block] | During the period shown in the bar chart:Highest Quarterly Return:June 30, 202020.77%Lowest Quarterly Return:March 31, 2020-17.87%Year to Date Most Recent Quarter:June 30, 20267.63% |
| Performance Table Heading | <span style="font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0%;">Average Annual Total Returns</span><span style="font-family:Arial;font-size:10pt;"> (For the periods ended December 31, 2025)</span> |
| None | |
| Prospectus [Line Items] | |
| Year to Date Return, Label [Optional Text] | <span style="font-family:Arial;font-size:10pt;margin-left:0.0pt;">Year to Date Most </span><span style="font-family:Arial;font-size:10pt;margin-left:0.0pt;">Recent Quarter:</span> |
| Bar Chart, Year to Date Return | 7.63% |
| Bar Chart, Year to Date Return, Date | Jun. 30, 2026 |
| Highest Quarterly Return, Label [Optional Text] | <span style="font-family:Arial;font-size:10pt;margin-left:0.0pt;">Highest Quarterly </span><span style="font-family:Arial;font-size:10pt;margin-left:0.0pt;">Return:</span> |
| Highest Quarterly Return | 20.77% |
| Highest Quarterly Return, Date | Jun. 30, 2020 |
| Lowest Quarterly Return, Label [Optional Text] | <span style="font-family:Arial;font-size:10pt;margin-left:0.0pt;">Lowest Quarterly </span><span style="font-family:Arial;font-size:10pt;margin-left:0.0pt;">Return:</span> |
| Lowest Quarterly Return | (17.87%) |
| Lowest Quarterly Return, Date | Mar. 31, 2020 |