 | us-gaap:FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedSecondAlternative |
 | us-gaap:FinancialInstrumentsOwnedStateAndMunicipalGovernmentObligationsAtFairValue | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedSecondAlternative |
 | us-gaap:FinancialInstrumentsOwnedOtherSovereignGovernmentObligationsAtFairValue | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedSecondAlternative |
 | us-gaap:FinancialInstrumentsOwnedCorporateDebtAtFairValue | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedSecondAlternative |
 | us-gaap:FinancialInstrumentsOwnedCorporateEquitiesAtFairValue | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedSecondAlternative |
 | us-gaap:FinancialInstrumentsOwnedPhysicalCommoditiesAtFairValue | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedSecondAlternative |
 | us-gaap:FinancialInstrumentsOwnedDerivativesAndOtherContractualAgreementsAtFairValue | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedSecondAlternative |
 | us-gaap:FinancialInstrumentsOwnedMortgagesMortgageBackedAndAssetBackedSecuritiesAtFairValue | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedSecondAlternative |
 | us-gaap:FinancialInstrumentsOwnedPrincipalInvestmentsAtFairValue | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedSecondAlternative |
 | us-gaap:FinancialInstrumentsOwnedOtherAtFairValue | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedSecondAlternative |
 | us-gaap:FinancialInstrumentsOwnedAndNotPledgedAtFairValue | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-DepositBasedOperationsFirstAlternate |
 | us-gaap:FinancialInstrumentsOwnedAndPledgedAsCollateralAtFairValue | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-DepositBasedOperationsFirstAlternate |