cm:Member: us-gaap:ExternalCreditRatingNonInvestmentGradeMember
External Credit Rating, Non Investment Grade [Member] |
us-gaap:ExternalCreditRatingNonInvestmentGradeMember |
External credit-rating that could be used to describe the current status of the payment and performance risk of credit derivatives and guarantee obligations that connote non-investment grade. |
cm:Member |
[Member] (nonnum:domainItemType) |
For Period (duration) |
(no balance type) |
true |
us-gaap:ExternalCreditRatingNonInvestmentGradeMember |