| Name | OtherComprehensiveLossHeldToMaturitySecurityReclassificationAdjustmentFromAociForNoncreditPortionOfOttiBeforeTaxAbstract |
|---|---|
| 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 |
|---|---|---|---|
| Other Comprehensive Loss, Held-to-maturity Security, Reclassification Adjustment from AOCI for Noncredit Portion of OTTI, before Tax [Abstract] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| elementCreationTaxonomyVersion | 2017 | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| Name | Relation Type | Role | |
|---|---|---|---|
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us-gaap:OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeHeldtomaturitySecuritiesBeforeTax | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfOtherComprehensiveIncome | |
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us-gaap:OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeHeldtomaturitySecuritiesBeforeTax | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfOtherComprehensiveIncomeStatementTable | |
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| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:OtherComprehensiveLossHeldToMaturitySecurityOttiBeforeTaxAfterAdjustmentsAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfOtherComprehensiveIncome | |
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