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Receivables from, Payables to, and Deposits with Broker-Dealers and Clearing Organizations (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
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MSCO shares of DTCC [Member] |  |
Receivables from, Payables to, and Deposits with Broker-Dealers and Clearing Organizations [Line Items] |  |
Common stock value | $ 1.4 | $ 1.1

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