| SourceName | Taxonomy Technical Improvement | http://fasb.org/srt/role/changeNote/changeNote |
| TaxonomyVersion | 2019 | http://fasb.org/srt/role/changeNote/changeNote |
| ChangeDate | 2018-10 | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedReferences | true | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedLabels | true | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedDocumentation | true | http://fasb.org/srt/role/changeNote/changeNote |
| PreviousDocumentation | Amount of net capital required to be maintained under the Commodity Futures Trading Commission's (CFTC) minimum financial requirements, pursuant to the Commodity Exchange Act, less the market value of certain commodity options. | http://fasb.org/srt/role/changeNote/changeNote |
| Publisher | CFTC | http://www.xbrl.org/2009/role/commonPracticeRef |
| Name | Rule 17 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Number | 1 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Section | 17 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Paragraph | (a) | http://www.xbrl.org/2009/role/commonPracticeRef |
| Subparagraph | (1)(i) | http://www.xbrl.org/2009/role/commonPracticeRef |