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Derivatives (Outstanding Derivatives Entered Into to Hedge Inventory or Fixed Price Purchase Commitments) (Details) bbl in Thousands, MMBTU in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 MMBTU $ / MMBTU $ / bbl $ / units bbl
Sell (Short) Contracts | Designated as hedges under accounting rules | Futures | Crude Oil |
Derivative [Line Items] |
Contract volumes (1,000 bbls) | bbl | 444
Weighted average contract price per bbl (in dollars per barrel) | 43.39
Sell (Short) Contracts | Not qualifying or not designated as hedges under accounting rules | Futures | Crude Oil |
Derivative [Line Items] |
Contract volumes (1,000 bbls) | bbl | 458
Weighted average contract price per bbl (in dollars per barrel) | 42.32
Sell (Short) Contracts | Not qualifying or not designated as hedges under accounting rules | Futures | Natural Gas |
Derivative [Line Items] |
Weighted average contract price per bbl (in dollars per barrel) | $ / MMBTU | 2.54
Contract volumes (1,000 MMBTU) | MMBTU | 101
Sell (Short) Contracts | Not qualifying or not designated as hedges under accounting rules | Swap | Natural Gas |
Derivative [Line Items] |
Weighted average contract price per bbl (in dollars per barrel) | 0.25
Contract volumes (1,000 MMBTU) | MMBTU | 136
Sell (Short) Contracts | Not qualifying or not designated as hedges under accounting rules | Options | Crude Oil |
Derivative [Line Items] |
Contract volumes (1,000 bbls) | bbl | 41
Weighted average premium received (in dollars per barrel) | 1.01
Buy (Long) Contracts | Designated as hedges under accounting rules | Futures | Crude Oil |
Derivative [Line Items] |
Contract volumes (1,000 bbls) | bbl | 0
Weighted average contract price per bbl (in dollars per barrel) | 0
Buy (Long) Contracts | Not qualifying or not designated as hedges under accounting rules | Futures | Crude Oil |
Derivative [Line Items] |
Contract volumes (1,000 bbls) | bbl | 160
Weighted average contract price per bbl (in dollars per barrel) | 39.08
Buy (Long) Contracts | Not qualifying or not designated as hedges under accounting rules | Futures | Natural Gas |
Derivative [Line Items] |
Weighted average contract price per bbl (in dollars per barrel) | $ / MMBTU | 2.53
Contract volumes (1,000 MMBTU) | MMBTU | 205
Buy (Long) Contracts | Not qualifying or not designated as hedges under accounting rules | Swap | Natural Gas |
Derivative [Line Items] |
Weighted average contract price per bbl (in dollars per barrel) | $ / units | 0
Contract volumes (1,000 MMBTU) | MMBTU | 0
Buy (Long) Contracts | Not qualifying or not designated as hedges under accounting rules | Options | Crude Oil |
Derivative [Line Items] |
Contract volumes (1,000 bbls) | bbl | 23
Weighted average premium received (in dollars per barrel) | 1.21

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