cm:Level2TextBlock: us-gaap:RevenueRecognitionPercentageOfCompletionMethod
| Revenue Recognition, Percentage-of-Completion Method [Policy Text Block] |
| us-gaap:RevenueRecognitionPercentageOfCompletionMethod |
| Disclosure of accounting policy for revenue recognition for long-term construction-type contracts accounted for using the percentage-of-completion method. The disclosure would generally be expected to include the method or methods of measuring extent of progress toward completion. If the entity departs from using the percentage-of-completion method for a single contract or a group of contracts for which reasonably dependable estimates cannot be made, such a departure from the basic policy is disclosed. The disclosure may also describe the accounting for significant changes in estimate. |
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| us-gaap:RevenueRecognitionPercentageOfCompletionMethod |