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cm:Concept: us-gaap:DepositAssetsEffectOfChangeInPresentValueAssumptionsResultingInAdditionsToExpectedRecoveries
Standard label: Deposit Assets, Effect of Change in Present Value Assumptions Resulting in Additions to Expected Recoveries
Name: us-gaap:DepositAssetsEffectOfChangeInPresentValueAssumptionsResultingInAdditionsToExpectedRecoveries
Documentation: Amount of decrease in expense due to change in present value assumptions used to value deposit assets.
Object type: cm:Concept
Data type: Monetary (xbrli:monetaryItemType)
Period type: For Period (duration)
Balance type: Credit
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:DepositAssetsEffectOfChangeInPresentValueAssumptionsResultingInAdditionsToExpectedRecoveries

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Labels
Label Role Language
Deposit Assets, Effect of Change in Present Value Assumptions Resulting in Additions to Expected Recoveries http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 340 30 50 2 (b) http://fasb.org/us-gaap/role/ref/legacyRef 340