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cm:Concept: us-gaap:ClosedBlockDividendObligationChangeInUnrealizedInvestmentGainsLosses
Standard label: Closed Block Dividend Obligation, Change in Unrealized Investment Gain (Loss)
Name: us-gaap:ClosedBlockDividendObligationChangeInUnrealizedInvestmentGainsLosses
Documentation: Amount of increase (decrease) in the closed block dividend obligation from the unrealized gain (loss) on investments allocated to the closed block.
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:ClosedBlockDividendObligationChangeInUnrealizedInvestmentGainsLosses

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Labels
Label Role Language
Closed Block Dividend Obligation, Change in Unrealized Investment Gain (Loss) http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 944 805 50 3 (b)(10) http://www.xbrl.org/2009/role/commonPracticeRef 944
FASB Accounting Standards Codification 944 805 55 4 http://www.xbrl.org/2003/role/exampleRef 944