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Litigation (Details) - Pending Litigation $ in Millions				12 Months Ended
	Nov. 13, 2013 USD ($)	Aug. 03, 2012 USD ($)	Feb. 14, 2011 USD ($)	Dec. 31, 1991 USD ($)	Dec. 31, 2018 LegalMatter	Jan. 03, 2012
MTBE
Loss Contingencies [Line Items]
Pending lawsuits and claims (in number of claims) | LegalMatter					7
Ecuador Litigation
Loss Contingencies [Line Items]
Pending lawsuits and claims (in number of claims) | LegalMatter					1
Remediation program term (in years)				3 years
Remediation program				$ 40
Damages awarded	$ 9,500		$ 8,600
Amount assessed for plaintiffs representatives			900
Additional amount assessed in punitive damages			$ 8,600
Public apology date within judgment			15 days
Proposed additional payment for plaintiff attorney fees as percentage of judgment						0.10%
Amount awarded to other party		$ 19,100

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Conducted remediation program.

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Amount awarded to other party in judgment or settlement of litigation.

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Amount of damages awarded to the plaintiff in the legal matter.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 450
-SubTopic 20
-Section 50
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