| Name | NonInvestmentAssetsLessNonInvestmentLiabilities |
|---|---|
| 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 |
|---|---|---|---|
| Non Investment Assets Less Non Investment Liabilities | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:NonInvestmentAssetsLessNonInvestmentLiabilitiesPercentOfNetAssets | parent-child | http://fasb.org/us-gaap/role/disclosure/InvestmentHoldings | |
us-gaap:NonInvestmentAssetsLessNonInvestmentLiabilitiesPercentOfNetAssets | domain-member | http://fasb.org/us-gaap/role/disclosure/InvestmentHoldingsScheduleOfInvestmentsTable | |
us-gaap:NonInvestmentAssetsLessNonInvestmentLiabilitiesPercentOfNetAssets | parent-child | http://fasb.org/us-gaap/role/disclosure/InvestmentsSoldNotYetPurchased | |
us-gaap:NonInvestmentAssetsLessNonInvestmentLiabilitiesPercentOfNetAssets | domain-member | http://fasb.org/us-gaap/role/disclosure/InvestmentsSoldNotYetPurchasedScheduleOfInvestmentsTable | |
us-gaap:NonInvestmentAssetsLessNonInvestmentLiabilitiesPercentOfNetAssets | parent-child | http://fasb.org/us-gaap/role/disclosure/SummaryOfInvestmentHoldings | |
us-gaap:NonInvestmentAssetsLessNonInvestmentLiabilitiesPercentOfNetAssets | domain-member | http://fasb.org/us-gaap/role/disclosure/SummaryOfInvestmentHoldingsScheduleOfInvestmentsTable | |
us-gaap:NonInvestmentAssetsLessNonInvestmentLiabilitiesPercentOfNetAssets | parent-child | http://fasb.org/us-gaap/role/disclosure/OtherThanSecuritiesInvestmentHoldings | |
us-gaap:NonInvestmentAssetsLessNonInvestmentLiabilitiesPercentOfNetAssets | domain-member | http://fasb.org/us-gaap/role/disclosure/OtherThanSecuritiesInvestmentHoldingsScheduleOfInvestmentsTable |