IndexLong-term Pollution Control Bond [Abstract]
| Name | LongtermPollutionControlBondCurrentAndNoncurrentAbstract |
|---|---|
| Namespace | http://fasb.org/us-gaap/2021-01-31 |
| Prefix | us-gaap |
| Data type | xbrli:stringItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | True |
Labels
| Text | Lang | Role | Container role |
|---|---|---|---|
| Long-term Pollution Control Bond [Abstract] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
References
| Name | Value | Role |
|---|---|---|
| elementCreationTaxonomyVersion | 2009 | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
Related Child Concepts
| Name | Relation Type | Role | |
|---|---|---|---|
 | us-gaap:LongtermPollutionControlBondCurrent | parent-child | http://fasb.org/us-gaap/role/disclosure/Debt |
| us-gaap:LongTermPollutionControlBond | parent-child | http://fasb.org/us-gaap/role/disclosure/Debt |
| us-gaap:LongtermPollutionControlBondCurrentAndNoncurrent | parent-child | http://fasb.org/us-gaap/role/disclosure/Debt |
Related Parent Concepts
| Name | Relation Type | Role | |
|---|---|---|---|
| us-gaap:LongTermDebtByComponentsCurrentAndNoncurrentAlternativeAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/Debt |