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Litigation (Details) - Pending Litigation $ in Billions |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Nov. 13, 2013 USD ($) | Feb. 28, 2011 USD ($) | Dec. 31, 1991 | Sep. 30, 2020 legal_matter | Jan. 31, 2012
MTBE |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Pending lawsuits and claims (in number of claims) | legal_matter |  |  |  | 6 |
Ecuador |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Conducted remediation program |  |  | 3 years |  |
Amount assessed in damages | $ | $ 9.5 | $ 9.5 |  |  |
Proposed additional payment for plaintiff attorney fees as percentage of judgment |  |  |  |  | 0.10%

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