Derivatives (Pre-tax Gains and Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Commodity \| Cost of sales and merchandising revenues
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivatives instruments recognized in earnings	$ 66,419	$ (25,236)
Not Designated as Hedging Instrument \| Interest rate contracts \| Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivatives instruments recognized in earnings	(990)	1,408
Not Designated as Hedging Instrument \| Foreign currency contract \| Other Income, Net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivatives instruments recognized in earnings	(1,467)	(1,122)
Designated as Hedging Instrument \| Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate derivative gains (losses) included in Other Comprehensive Income	(4,991)	0
Designated as Hedging Instrument \| Interest rate contracts \| Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate derivatives gains (losses) included in Interest income (expense)	$ 165	$ 0

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (a),(c),(d),(e)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 25
-Section 50
-Paragraph 1
-Subparagraph (a)(1),(2)
-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

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The net gain (loss) during the reporting period due to ineffectiveness in interest rate cash flow hedges. Recognized in earnings.

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