Derivatives (Schedule of Outstanding Derivatives Entered Into to Hedge Inventory or Fixed Price Purchase Commitments) (Details) bbl in Thousands, MMBTU in Thousands	9 Months Ended
	Sep. 30, 2022 MMBTU $ / bbl $ / MMBTU bbl
Designated as hedges under accounting rules | Sell (Short) Contracts | Future | Crude Oil
Derivative [Line Items]
Contract volumes (bbls) | bbl	104
Weighted average contract price | $ / bbl	88.81
Designated as hedges under accounting rules | Buy (Long) Contracts | Future | Crude Oil
Derivative [Line Items]
Contract volumes (bbls) | bbl	0
Weighted average contract price | $ / bbl	0
Not qualifying or not designated as hedges under accounting rules | Sell (Short) Contracts | Future | Crude Oil
Derivative [Line Items]
Contract volumes (bbls) | bbl	102
Weighted average contract price | $ / bbl	85.02
Not qualifying or not designated as hedges under accounting rules | Sell (Short) Contracts | Future | Natural Gas
Derivative [Line Items]
Contract volume (MMBTU) | MMBTU	66
Weighted average contract price | $ / MMBTU	7.50
Not qualifying or not designated as hedges under accounting rules | Sell (Short) Contracts | Future | Fuel Oil
Derivative [Line Items]
Contract volumes (bbls) | bbl	109
Weighted average contract price | $ / bbl	0.59
Not qualifying or not designated as hedges under accounting rules | Sell (Short) Contracts | Future | Petroleum Products
Derivative [Line Items]
Contract volumes (bbls) | bbl	120
Weighted average contract price | $ / bbl	61.81
Not qualifying or not designated as hedges under accounting rules | Sell (Short) Contracts | Swaps | Natural Gas
Derivative [Line Items]
Contract volume (MMBTU) | MMBTU	0
Weighted average contract price | $ / MMBTU	0
Not qualifying or not designated as hedges under accounting rules | Buy (Long) Contracts | Future | Crude Oil
Derivative [Line Items]
Contract volumes (bbls) | bbl	96
Weighted average contract price | $ / bbl	84.56
Not qualifying or not designated as hedges under accounting rules | Buy (Long) Contracts | Future | Natural Gas
Derivative [Line Items]
Contract volume (MMBTU) | MMBTU	433
Weighted average contract price | $ / MMBTU	5.26
Not qualifying or not designated as hedges under accounting rules | Buy (Long) Contracts | Future | Fuel Oil
Derivative [Line Items]
Contract volumes (bbls) | bbl	20
Weighted average contract price | $ / bbl	0.07
Not qualifying or not designated as hedges under accounting rules | Buy (Long) Contracts | Future | Petroleum Products
Derivative [Line Items]
Contract volumes (bbls) | bbl	70
Weighted average contract price | $ / bbl	60.99
Not qualifying or not designated as hedges under accounting rules | Buy (Long) Contracts | Swaps | Natural Gas
Derivative [Line Items]
Contract volume (MMBTU) | MMBTU	367
Weighted average contract price | $ / MMBTU	(0.30)