| Name | DerivativeUnderlyingBasis |
|---|---|
| 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 |
|---|---|---|---|
| Derivative, Underlying Basis | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Reference to the index or unit of measurement for the underlying which establishes the pricing terms of the derivative instrument. For example, the basis on the underlying for a natural gas futures contract might be the NYMEX price per million British thermal units (MMBtu). | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |