IndexOpen Option Contracts Written, Exercise Price
| Name | OpenOptionContractsWrittenExercisePrice |
|---|---|
| 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 |
|---|---|---|---|
| Open Option Contracts Written, Exercise Price | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |