cm:Concept: us-gaap:StandardProductWarrantyAccrualForeignCurrencyTranslationGainLoss
| Standard Product Warranty Accrual, Foreign Currency Translation Gain (Loss) |
| us-gaap:StandardProductWarrantyAccrualForeignCurrencyTranslationGainLoss |
| Amount of foreign currency translation gain (loss) which decreases (increases) the standard product warranty accrual. Excludes extended product warranties. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Credit |
| false |
| us-gaap:StandardProductWarrantyAccrualForeignCurrencyTranslationGainLoss |