Class Z [Member] Expense Example - Class Z Shares - Small Cap Core Portfolio - Class Z	Sep. 30, 2025 USD ($)
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 90
Expense Example, with Redemption, 3 Years	281
Expense Example, with Redemption, 5 Years	488
Expense Example, with Redemption, 10 Years	$ 1,084

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