| Standard label: | Gain Contingencies [Table] |
| Name: | us-gaap:GainContingenciesTable |
| Documentation: | Sets forth the existing conditions, situations, or sets of circumstances involving uncertainties as of the balance sheet date (or before issuance of the financial statements) that might result in a gain, typically reflecting care to avoid misleading implications as to the likelihood of realization, and previously disclosed contingent gains that were recognized as income in the period. |
| 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:GainContingenciesTable |
| Label | Role | Language |
| Gain Contingencies [Table] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 450 30 50 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 450 |