Derivatives - Derivative Instruments (Details) - 2021 Settlement	Mar. 31, 2021 MMBbls MMBTU $ / Barrel
Crude Oil
Derivative [Line Items]
Derivative instrument (MMbbl and MMbtu) | MMBbls	96.3
Crude Oil | Short position
Derivative [Line Items]
Ceiling sold price (dollars per barrel)	74.16
Natural Gas
Derivative [Line Items]
Derivative instrument (MMbbl and MMbtu) | MMBTU	154.4
Natural Gas | Short position
Derivative [Line Items]
Ceiling sold price (dollars per barrel)	3.61
Natural Gas | Long position
Derivative [Line Items]
Purchase price (dollars per barrel)	2.50