| Name | StepsTakenToEnsureOilAndGasDeliveryCommitments |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
| Data type | xbrli:stringItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| The steps taken to ensure available reserves and supplies are sufficient to meet such commitments. Such future information is generally provided for an appropriate period of one to three years. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Steps Taken to Ensure Oil and Gas Delivery Commitments (Deprecated 2019-01-31) | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |