Derivative Instruments And Hedging Activities Schedule of Realized Gain (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018		Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ 5,792		$ 3,291	$ 1,742	$ 8,567
Sales and other revenues	4,770,799		3,719,247	13,370,462	10,258,594
Gain (Loss) on Price Risk Hedge Ineffectiveness	(15,304)		(11,261)	(2,076)	21,556
Cost of products sold	3,752,234	[1]	2,888,549	10,695,275	8,283,183
Foreign Currency Gain (Loss) [Member] | Other Nonoperating Income (Expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Price Risk Hedge Ineffectiveness	(7,052)		0	18,504	0
Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	5,792		3,354	1,742	8,658
Commodity Contract [Member] | Operating Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Price Risk Hedge Ineffectiveness	0		(629)	0	(6,392)
Commodity Contract [Member] | Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Price Risk Hedge Ineffectiveness	(8,252)		(10,632)	(20,580)	3,403
Foreign Exchange Contract [Member] | Other Nonoperating Income (Expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Price Risk Hedge Ineffectiveness	0		0	0	24,545	[2]
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0		(63)	0	(91)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Cost and Expense, Operating	(1,631)		(5,385)	(6,038)	(5,859)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Sales and other revenues	(1,422)		(488)	(5,093)	7,937
Reclassification out of Accumulated Other Comprehensive Income [Member] | Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cost of products sold				0	(299)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Operating Expenses	(209)		(4,961)	(945)	(13,676)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Expense, Other	$ 0		$ 64	$ 0	$ 179

[1] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOjMwMGM4ZWZhNDg2YzRkYTA4MTZhNDdjYWM3MTJjYzkzfFRleHRTZWxlY3Rpb246NTIwMzc4RTM4MTJERkJGNDNCRDM1NEI4OUI5QTNENUQM}

[2] (1) Relates to Canadian currency swap contracts that settled on February 1, 2017 and effectively fixed the conversion rate on our PCLI purchase price.