| Name | OtherInvestmentNotReadilyMarketableAxis |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
| Data type | xbrli:stringItemType |
| Period type | duration |
| Substitution Group | xbrldt:dimensionItem |
| Balance | None |
| Nillable | True |
| Abstract | True |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Other Investment Not Readily Marketable [Axis] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Group of items that represent other investments not readily marketable, including description of investment, fair value, and value as measured by quoted value method. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| Publisher | FASB | http://fasb.org/us-gaap/role/ref/legacyRef |
| Name | Accounting Standards Codification | http://fasb.org/us-gaap/role/ref/legacyRef |
| Topic | 940 | http://fasb.org/us-gaap/role/ref/legacyRef |
| SubTopic | 820 | http://fasb.org/us-gaap/role/ref/legacyRef |
| Section | 50 | http://fasb.org/us-gaap/role/ref/legacyRef |
| Paragraph | 1 | http://fasb.org/us-gaap/role/ref/legacyRef |
| URI | http://asc.fasb.org/extlink&oid=35710923&loc=d3e45360-110995 | http://fasb.org/us-gaap/role/ref/legacyRef |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:OtherInvestmentNotReadilyMarketableNameDomain | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBrokersAndDealers | |
us-gaap:OtherInvestmentNotReadilyMarketableNameDomain | dimension-default | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBrokersAndDealersOtherInvestmentNotReadilyMarketableTable | |
us-gaap:OtherInvestmentNotReadilyMarketableNameDomain | dimension-domain | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBrokersAndDealersOtherInvestmentNotReadilyMarketableTable |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:OtherInvestmentNotReadilyMarketableTable | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBrokersAndDealers | |
us-gaap:OtherInvestmentNotReadilyMarketableTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBrokersAndDealersOtherInvestmentNotReadilyMarketableTable |