Shares [Member] Investment Objectives and Goals - Shares [Member] - Treasury Instruments Portfolio |
Nov. 30, 2025 |
|---|---|
| Prospectus [Line Items] | |
| Risk/Return [Heading] | TREASURY INSTRUMENTS PORTFOLIO—SHARES |
| Objective [Heading] | INVESTMENT OBJECTIVE |
| Objective, Primary [Text Block] | The Portfolio seeks to maximize current income to the extent consistent with the preservation of capital and maintenance of liquidity by investing its net assets, under normal conditions, exclusively in U.S. Treasury securities.
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