| Name | ScheduleOfRegulatoryLiabilitiesTable |
|---|---|
| Namespace | http://fasb.org/us-gaap/2021-01-31 |
| Prefix | us-gaap |
| Data type | xbrli:stringItemType |
| Period type | duration |
| Substitution Group | xbrldt:hypercubeItem |
| Balance | None |
| Nillable | True |
| Abstract | True |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Schedule of Regulatory Liabilities [Table] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| A table of liabilities that are created when regulatory agencies permit public utilities to defer recognition of certain revenues included in rate-setting. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| elementCreationTaxonomyVersion | 2011 | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:RegulatoryLiabilityAxis | parent-child | http://fasb.org/us-gaap/role/disclosure/RegulatedOperations | |
us-gaap:RegulatoryLiabilitiesLineItems | parent-child | http://fasb.org/us-gaap/role/disclosure/RegulatedOperations | |
us-gaap:RegulatoryLiabilityAxis | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/RegulatedOperationsScheduleOfRegulatoryLiabilitiesTable |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:ScheduleOfRegulatoryLiabilitiesTextBlock | parent-child | http://fasb.org/us-gaap/role/disclosure/RegulatedOperations | |
us-gaap:RegulatoryLiabilitiesLineItems | all | http://fasb.org/us-gaap/role/disclosure/RegulatedOperationsScheduleOfRegulatoryLiabilitiesTable |