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cm:Concept: us-gaap:AmortizationPeriodOfDeferredGainLossOnDiscontinuationOfPriceRiskFairValueHedge1
Standard label: Amortization Period of Deferred Gain (Loss) on Discontinuation of Price Risk Fair Value Hedge
Name: us-gaap:AmortizationPeriodOfDeferredGainLossOnDiscontinuationOfPriceRiskFairValueHedge1
Documentation: Period when adjustments to the carrying value of a hedged item are amortized upon discontinuation of the price risk fair value hedge, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
Object type: cm:Concept
Data type: xbrli:durationItemType
Period type: For Period (duration)
Balance type: (no balance type)
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:AmortizationPeriodOfDeferredGainLossOnDiscontinuationOfPriceRiskFairValueHedge1

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Labels
Label Role Language
Amortization Period of Deferred Gain (Loss) on Discontinuation of Price Risk Fair Value Hedge http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 815 25 35 9 http://fasb.org/us-gaap/role/ref/legacyRef 815