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cm:Level3TextBlock: us-gaap:ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentTextBlock
Standard label: Fair Value, Separate Account Investment [Table Text Block]
Name: us-gaap:ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentTextBlock
Documentation: Tabular disclosure of fair value of asset supporting separate account.
Object type: cm:Level3TextBlock
Data type: Text Block (HTML) (nonnum:textBlockItemType)
Period type: For Period (duration)
Balance type: (no balance type)
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentTextBlock

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Labels
Label Role Language
Fair Value, Separate Account Investment [Table Text Block] http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 944 20 55 15 http://fasb.org/us-gaap/role/ref/legacyRef 944
FASB Accounting Standards Codification 944 80 50 1 (e) http://www.xbrl.org/2009/role/commonPracticeRef 944
FASB Accounting Standards Codification 944 80 55 17 http://www.xbrl.org/2003/role/exampleRef 944