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cm:Abstract: us-gaap:TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefitAbstract
Standard label: Tax Cuts and Jobs Act, Incomplete Accounting, Provisional Income Tax Expense (Benefit) [Abstract]
Name: us-gaap:TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefitAbstract
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Object type: cm:Abstract
Data type: Text/String (xbrli:stringItemType)
Period type: For Period (duration)
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Workiva Wdesk Taxonomy Analyzer: us-gaap:TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefitAbstract

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Tax Cuts and Jobs Act, Incomplete Accounting, Provisional Income Tax Expense (Benefit) [Abstract] http://www.xbrl.org/2003/role/label en-US

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