| Standard label: | Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount |
| Name: | us-gaap:SharesSubjectToMandatoryRedemptionSettlementTermsAmount |
| Documentation: | Amount that would be paid, determined under the conditions specified in the contract, if the holder of the share has the right to redeem the shares. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:SharesSubjectToMandatoryRedemptionSettlementTermsAmount |
| Label | Role | Language |
| Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount | http://www.xbrl.org/2003/role/label | en-US |
| Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 480 10 50 2 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 480 |