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cm:Concept: us-gaap:OciMarketRiskBenefitInstrumentSpecificCreditRiskAdjustmentFromAociForDerecognitionAfterTax
Standard label: OCI, Market Risk Benefit, Instrument-Specific Credit Risk, Adjustment from AOCI for Derecognition, after Tax
Name: us-gaap:OciMarketRiskBenefitInstrumentSpecificCreditRiskAdjustmentFromAociForDerecognitionAfterTax
Documentation: Amount, after tax, of adjustment from accumulated other comprehensive income for gain (loss) (AOCI) from (increase) decrease in instrument-specific credit risk on contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk, not recognized in income and used in calculating liability for future policy benefit for payout annuity.
Object type: cm:Concept
Data type: Monetary (xbrli:monetaryItemType)
Period type: For Period (duration)
Balance type: Debit
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:OciMarketRiskBenefitInstrumentSpecificCreditRiskAdjustmentFromAociForDerecognitionAfterTax

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Labels
Label Role Language
OCI, Market Risk Benefit, Instrument-Specific Credit Risk, Adjustment from AOCI for Derecognition, after Tax http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 220 10 45 10A (n) http://www.xbrl.org/2003/role/disclosureRef 220
FASB Accounting Standards Codification 220 10 45 11 http://www.xbrl.org/2003/role/disclosureRef 220