| Name | DebtSecuritiesHeldToMaturityAllowanceForCreditLossRollForward |
|---|---|
| Namespace | http://fasb.org/us-gaap/2021-01-31 |
| Prefix | us-gaap |
| Data type | xbrli:stringItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | True |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| elementCreationTaxonomyVersion | 2019 | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| SourceName | Financial Instruments-Credit Losses | http://fasb.org/srt/role/changeNote/changeNote |
| TaxonomyVersion | 2019 | http://fasb.org/srt/role/changeNote/changeNote |
| ChangeDate | 2018-09 | http://fasb.org/srt/role/changeNote/changeNote |
| NewElement | true | http://fasb.org/srt/role/changeNote/changeNote |
| Source_ASU_Number | 2016-13 | http://fasb.org/srt/role/changeNote/changeNote |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLoss | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses | |
us-gaap:DebtSecuritiesHeldToMaturityCreditLossExpenseReversal | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses | |
us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses | |
us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLossRecovery | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses | |
us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLossWriteoff | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses | |
us-gaap:DebtSecuritiesHeldToMaturityChangeInPresentValueExpenseReversal | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses | |
us-gaap:DebtSecuritiesHeldToMaturityTransferToAvailableForSaleAllowanceForCreditLossExpenseReversal | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses | |
us-gaap:DebtSecuritiesHeldToMaturityTransferToAvailableForSaleAllowanceForCreditLossExpense | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses | |
us-gaap:DebtSecuritiesAvailableForSaleTransferToHeldToMaturityAllowanceForCreditLossExpenseReversal | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses | |
us-gaap:DebtSecuritiesAvailableForSaleTransferToHeldToMaturityAllowanceForCreditLossExpense | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses | |
us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLossPeriodIncreaseDecrease | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses | |
us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLoss | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses | |
us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLoss | domain-member | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityAllowanceForCreditLossTable | |
us-gaap:DebtSecuritiesHeldToMaturityCreditLossExpenseReversal | domain-member | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityAllowanceForCreditLossTable | |
us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease | domain-member | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityAllowanceForCreditLossTable | |
us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLossRecovery | domain-member | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityAllowanceForCreditLossTable | |
us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLossWriteoff | domain-member | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityAllowanceForCreditLossTable | |
us-gaap:DebtSecuritiesHeldToMaturityChangeInPresentValueExpenseReversal | domain-member | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityAllowanceForCreditLossTable | |
us-gaap:DebtSecuritiesHeldToMaturityTransferToAvailableForSaleAllowanceForCreditLossExpenseReversal | domain-member | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityAllowanceForCreditLossTable | |
us-gaap:DebtSecuritiesHeldToMaturityTransferToAvailableForSaleAllowanceForCreditLossExpense | domain-member | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityAllowanceForCreditLossTable | |
us-gaap:DebtSecuritiesAvailableForSaleTransferToHeldToMaturityAllowanceForCreditLossExpenseReversal | domain-member | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityAllowanceForCreditLossTable | |
us-gaap:DebtSecuritiesAvailableForSaleTransferToHeldToMaturityAllowanceForCreditLossExpense | domain-member | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityAllowanceForCreditLossTable | |
us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLossPeriodIncreaseDecrease | domain-member | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityAllowanceForCreditLossTable |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:DebtSecuritiesHeldtomaturityAllowanceForCreditLossLineItems | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses | |
us-gaap:DebtSecuritiesHeldtomaturityAllowanceForCreditLossLineItems | domain-member | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityAllowanceForCreditLossTable |