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cm:Abstract: us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityAbstract
Standard label: Equity Method Investment, Difference Between Carrying Amount and Underlying Equity [Abstract]
Name: us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityAbstract
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Object type: cm:Abstract
Data type: Text/String (xbrli:stringItemType)
Period type: For Period (duration)
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Abstract: true
Workiva Wdesk Taxonomy Analyzer: us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityAbstract

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Equity Method Investment, Difference Between Carrying Amount and Underlying Equity [Abstract] http://www.xbrl.org/2003/role/label en-US

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