| Standard label: | Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Fair Value of Shares |
| Name: | us-gaap:SharesSubjectToMandatoryRedemptionSettlementTermsFairValueOfShares |
| Documentation: | The fair value of shares that would be issued, determined under the conditions specified in the contract if the settlement were to occur at the reporting date. |
| 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:SharesSubjectToMandatoryRedemptionSettlementTermsFairValueOfShares |
| Label | Role | Language |
| Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Fair Value of Shares | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 480 10 50 2 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 480 |