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Derivatives - Gross Notional Values (Details) bbl in Millions, $ in Millions | 6 Months Ended
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Jun. 30, 2018 USD ($) bbl
Long | Commodity contracts |
Derivative instruments, at their respective fair value positions |
Notional value of commodity contracts (in barrels) | bbl | 77.5
Long | Foreign currency contracts | USD |
Derivative instruments, at their respective fair value positions |
Notional amount of foreign currency exchange contracts | $ | $ 401.2
Short | Commodity contracts |
Derivative instruments, at their respective fair value positions |
Notional value of commodity contracts (in barrels) | bbl | 87.7
Short | Foreign currency contracts | USD |
Derivative instruments, at their respective fair value positions |
Notional amount of foreign currency exchange contracts | $ | $ 275.6

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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 + 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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- 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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