| Name | LongTermContractForPurchaseOfElectricPowerDomain |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
| Data type | nonnum:domainItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | True |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Long-term Contract for Purchase of Electric Power [Domain] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Name of long-term contract for purchase of electric power. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| Publisher | FASB | http://fasb.org/us-gaap/role/ref/legacyRef |
| Name | Accounting Standards Codification | http://fasb.org/us-gaap/role/ref/legacyRef |
| Topic | 980 | http://fasb.org/us-gaap/role/ref/legacyRef |
| SubTopic | 10 | http://fasb.org/us-gaap/role/ref/legacyRef |
| Section | S99 | http://fasb.org/us-gaap/role/ref/legacyRef |
| Paragraph | 1 | http://fasb.org/us-gaap/role/ref/legacyRef |
| Subparagraph | (SAB Topic 10.D) | http://fasb.org/us-gaap/role/ref/legacyRef |
| URI | http://asc.fasb.org/extlink&oid=6499423&loc=d3e659339-123030 | http://fasb.org/us-gaap/role/ref/legacyRef |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:LongTermContractForPurchaseOfElectricPowerAxis | parent-child | http://fasb.org/us-gaap/role/disclosure/RegulatedOperations | |
us-gaap:LongTermContractForPurchaseOfElectricPowerAxis | dimension-default | http://fasb.org/us-gaap/role/disclosure/RegulatedOperationsLongTermContractsForPurchaseOfElectricPowerTable | |
us-gaap:LongTermContractForPurchaseOfElectricPowerAxis | dimension-domain | http://fasb.org/us-gaap/role/disclosure/RegulatedOperationsLongTermContractsForPurchaseOfElectricPowerTable |