| Standard label: | Net Assets, Geographic Area [Member] |
| Name: | us-gaap:NetAssetsGeographicAreaMember |
| Documentation: | Carrying amount as of the balance sheet date of the total assets less the total liabilities of a designated geographic area ( such as a state, country, continent, or market) when it serves as a benchmark in a concentration of risk calculation. |
| Object type: | cm:Member |
| Data type: | [Member] (nonnum:domainItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:NetAssetsGeographicAreaMember |
| Label | Role | Language |
| Net Assets, Geographic Area [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |