cm:Member: us-gaap:AccountingStandardsUpdate201705Member
| Accounting Standards Update 2017-05 [Member] |
| us-gaap:AccountingStandardsUpdate201705Member |
| Accounting Standards Update 2017-05 Other Income-Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets. |
| cm:Member |
| [Member] (nonnum:domainItemType) |
| For Period (duration) |
| (no balance type) |
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| us-gaap:AccountingStandardsUpdate201705Member |