cm:Concept: us-gaap:LongTermContractForPurchaseOfElectricPowerAnnualMinimumDebtServicePaymentRequired
| Long-term Contract for Purchase of Electric Power, Annual Minimum Debt Service Payment Required |
| us-gaap:LongTermContractForPurchaseOfElectricPowerAnnualMinimumDebtServicePaymentRequired |
| Under long-term contracts with public utility districts, cooperatives or other organizations, a utility company receives a portion of the output of a production plant constructed and financed by the district or cooperative. The utility has only a nominal or no investment at all in the plant but pays a proportionate part of the plant's costs, including debt service. If the utility is obligated to pay certain minimum amounts which cover debt service requirements whether or not the plant is operating, the amount can be disclosed here. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Debit |
| false |
| us-gaap:LongTermContractForPurchaseOfElectricPowerAnnualMinimumDebtServicePaymentRequired |