| Standard label: | Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Maximum Number of Shares |
| Name: | us-gaap:SharesSubjectToMandatoryRedemptionSettlementTermsMaximumNumberOfShares |
| Documentation: | The maximum number of shares that the issuer could be required to issue to redeem the instrument, if applicable. |
| Object type: | cm:Concept |
| Data type: | Shares (xbrli:sharesItemType) |
| Period type: | As Of (instant) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:SharesSubjectToMandatoryRedemptionSettlementTermsMaximumNumberOfShares |
| Label | Role | Language |
| Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Maximum Number of Shares | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 480 10 50 2 (d) | http://fasb.org/us-gaap/role/ref/legacyRef | 480 |