cm:Axis: us-gaap:ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis
Schedule of Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Axis] |
us-gaap:ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis |
Represents settlement terms for the group of mandatorily redeemable securities, including the description and the details of all terms for each outstanding financial instrument and each settlement option. |
cm:Axis |
Text/String (xbrli:stringItemType) |
For Period (duration) |
(no balance type) |
true |
us-gaap:ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis |