IndexInvestment Owned, Unrestricted, Carrying Value Per Unit at Date of Purchase Price Agreement (Deprecated 2020-01-31)
| Name | InvestmentOwnedUnrestrictedCarryingValuePerUnitAtDateOfPurchasePriceAgreement |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
| Data type | srt-types:perUnitItemType |
| Period type | instant |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | False |
Labels
| Text | Lang | Role | Container role |
|---|---|---|---|
| The carrying value per unit of investment of unrestricted investment of the same issue as the restricted investment during the preceding year at the date the purchase price was agreed. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Investment Owned, Unrestricted, Carrying Value Per Unit at Date of Purchase Price Agreement (Deprecated 2020-01-31) | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |