| Line | Label | Object Class | Period Type | Balance | Name |
| 1 | Inventory, Noncurrent [Roll Up] | us-gaap:InventoryNoncurrentAbstract | |||
| 2 | Inventory, Drilling, Noncurrent | [Concept] Monetary | As Of | Debit | us-gaap:InventoryDrillingNoncurrent |
| 3 | Inventory, Gas in Storage Underground, Noncurrent | [Concept] Monetary | As Of | Debit | us-gaap:InventoryGasInStorageUndergroundNoncurrent |
| 4 | Other Inventory, Noncurrent | [Concept] Monetary | As Of | Debit | us-gaap:OtherInventoryNoncurrent |
| 5 | Inventory, Noncurrent, Total | [Concept] Monetary | As Of | Debit | us-gaap:InventoryNoncurrent |