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cm:Concept: us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskBeforeTax
Standard label: AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, before Tax
Name: us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskBeforeTax
Documentation: Amount, before tax, of accumulated other comprehensive income (loss) (AOCI) from (increase) decrease in instrument-specific credit risk on contract or contract feature in long-duration contract issued by insurance entity protecting contract holder from other-than-nominal capital market risk and exposing insurance entity to other-than-nominal capital market risk.
Object type: cm:Concept
Data type: Monetary (xbrli:monetaryItemType)
Period type: As Of (instant)
Balance type: Credit
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskBeforeTax

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Labels
Label Role Language
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, before Tax http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 944 40 50 7B (a) http://www.xbrl.org/2009/role/commonPracticeRef 944
FASB Accounting Standards Codification 944 40 55 29G http://www.xbrl.org/2003/role/exampleRef 944
FASB Accounting Standards Codification 944 40 55 13K (k) http://www.xbrl.org/2003/role/exampleRef 944
FASB Accounting Standards Codification 944 40 65 2 (h)(1) http://www.xbrl.org/2009/role/commonPracticeRef 944