Details for Selection
| Standard label: | Energy Related Inventory, Coal |
| Name: | us-gaap:EnergyRelatedInventoryCoal |
| Documentation: | Carrying amount as of the balance sheet date of coal, which is a combustible rock or minerals which are extracted from the ground and used as fuel. |
| Commentary: | |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As of (instant) |
| Balance type: | Debit |
| Object class: | [Concept] |