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Financial Instruments and Derivatives - Net Positions of Other Derivatives Contract (Details) - Mar. 31, 2019 - Derivatives Not Designated as Hedging Instruments R in Thousands, $ in Thousands, $ in Thousands, $ in Thousands | COP ($) | MXN ($) | CAD ($) | ZAR (R)
--- | --- | --- | --- | ---
purchase |  |  |  |
Derivative [Line Items] |  |  |  |
Net position | $ 9,199,944 | $ 420,776 | $ 21,475 |
sell |  |  |  |
Derivative [Line Items] |  |  |  |
Net position |  |  |  | R 8,261

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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