Derivative Instruments And Hedging Activities Derivatives and Hedging Instruments Gains Losses due to Settlements Hedge Ineffectiveness (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Trading Activity, Gains and Losses, Net [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ 6,914	$ (6,014)	$ (6,410)	$ 7,934
Sales and other revenues	2,062,930	4,782,615	5,463,475	8,679,862
Cost of products sold	1,576,996	3,704,884	4,270,722	6,904,089
Reclassification out of Accumulated Other Comprehensive Income [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Other Cost and Expense, Operating	(5,401)	5,321	1,175	6,963
Commodity Contract [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	6,914	(6,014)	(6,410)	7,934
Commodity Contract [Member] \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Sales and other revenues	(5,403)	0	49	(1,799)
Cost of products sold	459	5,674	2,289	9,295
Operating Expenses	$ (457)	$ (353)	$ (1,163)	$ (533)

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Amount of unrealized gain (loss) related to derivatives designated as cash flow hedging instruments, recorded in results of operations to the extent that the cash flow hedge is determined to be ineffective.

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