| Name | FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustment |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
| Data type | xbrli:monetaryItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | debit |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Financial Guarantee Insurance Contracts, Premiums Receivable, Adjustment | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Financial Guarantee Insurance Contracts, Premiums Receivable, Adjustment, Total | en-US | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentChangeInPeriodOfContract | summation-item | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:FinancialGuaranteeInsuranceContractsPremiumsReceivableAccretionOfDiscountOnPremiumReceivable | summation-item | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
Financial Guarantee Insurance Contracts, Premiums Receivable, Increase (Decrease), Other Adjustments us-gaap:FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentOtherAdjustments | summation-item | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:FinancialGuaranteeInsuranceContractsPremiumsReceivablePeriodIncreaseDecrease | summation-item | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentAbstract | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceFinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodTable |