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cm:Concept: us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAdjustmentsAfterTax
Standard label: Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), Adjustments, after Tax
Name: us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAdjustmentsAfterTax
Documentation: Amount, after tax, of adjustments from accumulated other comprehensive income (AOCI) for gain (loss) from increase (decrease) in value of excluded component of derivative designated and qualifying as hedge. Adjustments include, but are not limited to, reclassifications for sale and settlement, and amounts recognized under systematic and rational method.
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:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAdjustmentsAfterTax

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Labels
Label Role Language
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), Adjustments, 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 (dd) http://www.xbrl.org/2003/role/disclosureRef 220
FASB Accounting Standards Codification 220 10 45 11 http://www.xbrl.org/2003/role/disclosureRef 220
FASB Accounting Standards Codification 220 10 45 15 http://www.xbrl.org/2003/role/disclosureRef 220
FASB Accounting Standards Codification 815 10 50 4C (d) http://www.xbrl.org/2003/role/disclosureRef 815