| Name | CashAndSecuritiesSegregatedUnderFederalAndOtherRegulations |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
| Data type | xbrli:monetaryItemType |
| Period type | instant |
| Substitution Group | xbrli:item |
| Balance | debit |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Cash and Securities Segregated under Federal and Other Regulations | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Cash and Securities Segregated under Federal and Other Regulations, Total | en-US | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Amount of cash subject to withdrawal restrictions, restricted deposits held as compensating balances, and cash and securities segregated in compliance with regulations (such as cash deposited in a special reserve account for the exclusive benefit of customers). | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| SourceName | ASC Reorganization | http://fasb.org/srt/role/changeNote/changeNote |
| TaxonomyVersion | 2019 | http://fasb.org/srt/role/changeNote/changeNote |
| ChangeDate | 2018-03 | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedReferences | true | http://fasb.org/srt/role/changeNote/changeNote |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:CashAndSecuritiesSegregatedUnderSecuritiesExchangeCommissionRegulation | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-DepositBasedOperations | |
us-gaap:CashAndSecuritiesSegregatedUnderCommodityExchangeActRegulation | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-DepositBasedOperations | |
us-gaap:CashSegregatedUnderOtherRegulations | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-DepositBasedOperations | |
us-gaap:SecuritiesSegregatedUnderOtherRegulations | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-DepositBasedOperations |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:OtherRestrictedAssets | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-DepositBasedOperations | |
us-gaap:CashAndSecuritiesSegregatedUnderFederalAndOtherRegulationsAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-SecuritiesBasedOperations | |
us-gaap:CashAndSecuritiesSegregatedUnderFederalAndOtherRegulationsAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-SecuritiesBasedOperationsStatementTable | |
us-gaap:CashAndSecuritiesSegregatedUnderFederalAndOtherRegulationsAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBrokersAndDealers |