cm:LineItems: us-gaap:DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
us-gaap:DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems |
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |
cm:LineItems |
Text/String (xbrli:stringItemType) |
For Period (duration) |
(no balance type) |
true |
us-gaap:DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems |