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Customer Accounts - Narrative (Details) - USD ($) | Sep. 30, 2023 | Sep. 30, 2022
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Banking and Thrift, Interest [Abstract] |  |
Uninsured deposits | $ 4,124,355,000 | $ 4,856,148,927

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- References No definition available. + Details
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- Definition Amount of uninsured deposit liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (e) -Publisher SEC + Details
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