Derivative Instruments And Hedging Activities Schedule of Realized Gain (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ (7,562)	$ 5,792	$ 372	$ 1,796
Sales and other revenues	4,424,828	4,770,799	13,104,690	13,370,462
Gain (Loss) on Price Risk Hedge Ineffectiveness	12,633	(15,304)	(10,417)	(2,076)
Cost of products sold	3,403,767	3,752,234	10,307,856	10,695,275
Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(7,562)	5,792	372	1,796
Commodity Contract [Member] | Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Price Risk Hedge Ineffectiveness	8,640	(8,252)	1,561	(20,580)
Commodity Contract [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Price Risk Hedge Ineffectiveness	(1,720)	0	(2,995)	0
Foreign Currency Gain (Loss) [Member] | Other Nonoperating Income (Expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Price Risk Hedge Ineffectiveness	5,713	(7,052)	(8,983)	18,504
Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Cost and Expense, Operating	5,573	(1,631)	12,537	(6,038)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Sales and other revenues	0	(1,422)	(1,799)	(5,093)
Cost of products sold	6,027	0	15,323	0
Operating Expenses	$ (454)	$ (209)	$ (987)	$ (945)