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Derivative Instruments - Gross Notional Values (Details) bbl in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($) bbl
Buy / Long | Commodity contracts |
Derivative [Line Items] |
Notional value of commodity contracts | bbl | 66.5
Buy / Long | Foreign currency contracts | U.S. dollar |
Derivative [Line Items] |
Notional amount of foreign currency contracts | $ | $ 485.5
Sell / Short | Commodity contracts |
Derivative [Line Items] |
Notional value of commodity contracts | bbl | 75.9
Sell / Short | Foreign currency contracts | U.S. dollar |
Derivative [Line Items] |
Notional amount of foreign currency contracts | $ | $ 255.8

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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Nominal volume used to calculate payments on a derivative instrument. + References No definition available. + Details
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