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cm:Member: us-gaap:AccumulatedGainLossFinancialLiabilityFairValueOptionAttributableToNoncontrollingInterestMember
Standard label: Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Noncontrolling Interest [Member]
Name: us-gaap:AccumulatedGainLossFinancialLiabilityFairValueOptionAttributableToNoncontrollingInterestMember
Documentation: Accumulated other comprehensive income (loss) from increase (decrease) in instrument-specific credit risk of financial liability measured under fair value option, attributable to noncontrolling interest.
Object type: cm:Member
Data type: [Member] (nonnum:domainItemType)
Period type: For Period (duration)
Balance type: (no balance type)
Abstract: true
Workiva Wdesk Taxonomy Analyzer: us-gaap:AccumulatedGainLossFinancialLiabilityFairValueOptionAttributableToNoncontrollingInterestMember

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Labels
Label Role Language
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Noncontrolling Interest [Member] 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 (l) http://www.xbrl.org/2003/role/disclosureRef 220
FASB Accounting Standards Codification 220 10 45 14A http://www.xbrl.org/2003/role/disclosureRef 220
FASB Accounting Standards Codification 810 10 50 1A (c)(3) http://www.xbrl.org/2003/role/disclosureRef 810