cm:Concept: us-gaap:IncreaseDecreaseInGasImbalanceReceivable
| Increase (Decrease) in Gas Balancing Receivable |
| us-gaap:IncreaseDecreaseInGasImbalanceReceivable |
| Change in the balance of the gas balancing receivable account. Gas imbalances occur when the entity sells more or less than its entitled ownership percentage of total gas production. If the entity receives less than it is entitled, the underproduction is recorded as a receivable. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Credit |
| false |
| us-gaap:IncreaseDecreaseInGasImbalanceReceivable |