| Name | BeneficialInterestSecuredByPrepayableFinancialInstrumentsLastOfLayerAmortizedCost |
|---|---|
| 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 |
|---|---|---|---|
| Amortized cost of beneficial interest secured by prepayable financial instrument, used to designate hedging relationship in which hedged item is last layer expected to be remaining at end of hedging relationship. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Beneficial Interest, Secured by Prepayable Financial Instruments, Last-of-Layer, Amortized Cost | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| Publisher | FASB | http://www.xbrl.org/2003/role/disclosureRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2003/role/disclosureRef |
| Topic | 815 | http://www.xbrl.org/2003/role/disclosureRef |
| SubTopic | 10 | http://www.xbrl.org/2003/role/disclosureRef |
| Section | 50 | http://www.xbrl.org/2003/role/disclosureRef |
| Paragraph | 4EEE | http://www.xbrl.org/2003/role/disclosureRef |
| Subparagraph | (a) | http://www.xbrl.org/2003/role/disclosureRef |
| URI | http://asc.fasb.org/extlink&oid=121590274&loc=SL109999718-113959 | http://www.xbrl.org/2003/role/disclosureRef |