cm:Concept: us-gaap:DepositAssetsEffectOfChangeInPresentValueAssumptionsResultingInReductionsToExpectedRecoveries
Deposit Assets, Effect of Change in Present Value Assumptions Resulting in Reductions to Expected Recoveries |
us-gaap:DepositAssetsEffectOfChangeInPresentValueAssumptionsResultingInReductionsToExpectedRecoveries |
Amount of increase in expense due to change in present value assumptions used to value deposit assets. |
cm:Concept |
Monetary (xbrli:monetaryItemType) |
For Period (duration) |
Debit |
false |
us-gaap:DepositAssetsEffectOfChangeInPresentValueAssumptionsResultingInReductionsToExpectedRecoveries |