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Litigation (Details) $ in Millions |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Nov. 13, 2013 USD ($) | Feb. 28, 2011 USD ($) | Dec. 31, 1991 | Mar. 31, 2020 LegalMatter | Jan. 31, 2012
MTBE | Pending Litigation |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Pending lawsuits and claims (in number of claims) | LegalMatter |  |  |  | 6 |
Ecuador | Pending Litigation |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Conducted remediation program |  |  | 3 years |  |
Amount assessed in damages | $ 9,500 | $ 8,600 |  |  |
Amount assessed for plaintiffs representatives |  | 900 |  |  |
Additional amount assessed in punitive damages |  | $ 8,600 |  |  |
Public apology date within judgment/clarification ruling (in days) |  | 15 days |  |  |
Proposed additional payment for plaintiff attorney fees as percentage of judgment |  |  |  |  | 0.10%
Ecuador | Declaratory Relief Claim |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Pending lawsuits and claims (in number of claims) | LegalMatter |  |  |  | 1 |

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