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Derivative Instruments - Gross Notional Values (Details) bbl in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) bbl
Long | Commodity contracts
Derivative [Line Items]
Notional value of commodity contracts | bbl	31.5
Long | Foreign currency contracts | U.S. dollar
Derivative [Line Items]
Notional amount of foreign currency contracts | $	$ 261.0
Short | Commodity contracts
Derivative [Line Items]
Notional value of commodity contracts | bbl	22.8
Short | Foreign currency contracts | U.S. dollar
Derivative [Line Items]
Notional amount of foreign currency contracts | $	$ 63.9

X

- 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

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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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X

- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

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- Details

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