Investments - Short-Term (Details) - U.S. Treasury Securities - USD ($) $ in Millions	Jan. 31, 2024	Oct. 31, 2023
Investments in United States Treasury Securities
Amortized cost	$ 0.0	$ 103.8
Weighted average yield to maturity	5.45%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details