cm:Level3TextBlock: us-gaap:FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTableTextBlock
Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table Text Block] |
us-gaap:FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTableTextBlock |
Tabular disclosure of information about fair value of asset and liability not measured at fair value. |
cm:Level3TextBlock |
Text Block (HTML) (nonnum:textBlockItemType) |
For Period (duration) |
(no balance type) |
false |
us-gaap:FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTableTextBlock |