IndexAsset Management [Member]
| Name | AssetManagement1Member |
|---|---|
| Namespace | http://fasb.org/us-gaap/2021-01-31 |
| Prefix | us-gaap |
| Data type | dtr-types:domainItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | True |
Labels
| Text | Lang | Role | Container role |
|---|---|---|---|
| Asset Management [Member] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Management of investment fund portfolio. Excludes investment advisory, distribution and servicing, and performance fee. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
References
| Name | Value | Role |
|---|---|---|
| elementCreationTaxonomyVersion | 2018 | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| Publisher | FASB | http://www.xbrl.org/2009/role/commonPracticeRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2009/role/commonPracticeRef |
| Topic | 606 | http://www.xbrl.org/2009/role/commonPracticeRef |
| SubTopic | 10 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Section | 55 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Paragraph | 91 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Subparagraph | (a) | http://www.xbrl.org/2009/role/commonPracticeRef |
| URI | http://asc.fasb.org/extlink&oid=123410239&loc=SL49130690-203046-203046 | http://www.xbrl.org/2009/role/commonPracticeRef |
Related Parent Concepts
| Name | Relation Type | Role | |
|---|---|---|---|
 | us-gaap:InvestmentAdvisoryManagementAndAdministrativeServiceMember | domain-member | http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists |
| us-gaap:InvestmentAdvisoryManagementAndAdministrativeServiceMember | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncome |
| us-gaap:InvestmentAdvisoryManagementAndAdministrativeServiceMember | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeStatementTable |