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cm:Concept: us-gaap:OciLiabilityForFuturePolicyBenefitGainLossAfterReclassificationAdjustmentBeforeTaxNoncontrollingInterest
Standard label: OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment, before Tax, Noncontrolling Interest
Name: us-gaap:OciLiabilityForFuturePolicyBenefitGainLossAfterReclassificationAdjustmentBeforeTaxNoncontrollingInterest
Documentation: Amount, before tax and after reclassification adjustment, of unrealized gain (loss) from (increase) decrease in liability for future policy benefit from change in discount rate, attributable to noncontrolling interest.
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:OciLiabilityForFuturePolicyBenefitGainLossAfterReclassificationAdjustmentBeforeTaxNoncontrollingInterest

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Labels
Label Role Language
OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment, before Tax, Noncontrolling Interest http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 220 10 45 11 http://www.xbrl.org/2003/role/disclosureRef 220
FASB Accounting Standards Codification 810 10 50 1A (c )(3) http://www.xbrl.org/2003/role/disclosureRef 810
FASB Accounting Standards Codification 810 10 45 19 http://www.xbrl.org/2003/role/disclosureRef 810