| Standard label: | Federal Income Tax Note [Table] |
| Name: | us-gaap:FederalIncomeTaxNoteTable |
| Documentation: | Table of federal income tax note for schedule of investments. The federal income tax note may be qualified for security investments, non-security investments and/or for the combination of security and non-security investments. |
| Object type: | cm:Table |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:FederalIncomeTaxNoteTable |
| Label | Role | Language |
| Federal Income Tax Note [Table] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 946 320 S99 1 (SX 210.12-12.8) | http://fasb.org/us-gaap/role/ref/legacyRef | 946 |
| FASB Accounting Standards Codification 946 320 S99 4 (SX 210.12-12C.11) | http://fasb.org/us-gaap/role/ref/legacyRef | 946 |
| FASB Accounting Standards Codification 946 320 S99 5 (SX 210.12-13.7) | http://fasb.org/us-gaap/role/ref/legacyRef | 946 |