v3.26.1

Index 400 Stock Portfolio Shareholder Fees	Dec. 31, 2025 USD ($)
Index 400 Stock Portfolio \| Index 400 Stock Portfolio
Prospectus [Line Items]
Shareholder Fee, Other

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- References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 1
-Subsection a

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- References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
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-Paragraph 2

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