IndexPrincipal Address [Member] (Deprecated 2019-01-31)
| Name | PrincipalAddressMember |
|---|---|
| Namespace | http://xbrl.sec.gov/dei/2019-01-31 |
| Prefix | dei |
| Data type | nonnum:domainItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | True |
Labels
| Text | Lang | Role | Container role |
|---|---|---|---|
| Use the default member of EntityAddressesAddressTypeAxis instead. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Principal Address [Member] (Deprecated 2019-01-31) | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |