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cm:Level2TextBlock: us-gaap:CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy
Standard label: Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]
Name: us-gaap:CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy
Documentation: Entity's cash and cash equivalents accounting policy with respect to restricted balances. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits.
Object type: cm:Level2TextBlock
Data type: Text Block (HTML) (nonnum:textBlockItemType)
Period type: For Period (duration)
Balance type: (no balance type)
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy

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Labels
Label Role Language
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 210 10 S99 1 (SX 210.5-02(1)) http://fasb.org/us-gaap/role/ref/legacyRef 210
FASB Accounting Standards Codification 230 10 50 1 http://fasb.org/us-gaap/role/ref/legacyRef 230
FASB Accounting Standards Codification 235 10 50 3 http://fasb.org/us-gaap/role/ref/legacyRef 235
FASB Accounting Standards Codification 942 210 S99 1 (SX 210.9-03(1)(a)) http://fasb.org/us-gaap/role/ref/legacyRef 942