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DERIVATIVE FINANCIAL INSTRUMENTS - Notional Amount of Foreign Exchange Derivative Instruments (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Notional Amount (U.S. Dollars) | $ 9,966 | $ 8,829
Foreign exchange contracts |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Notional Amount (U.S. Dollars) | 3,482 | 3,816
Foreign exchange contracts | Australian dollars |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Notional Amount (U.S. Dollars) | $ 1,184 | $ 1,214
Average Exchange Rate | 75.00% | 74.00%
Foreign exchange contracts | British pounds |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Notional Amount (U.S. Dollars) | $ 1,263 | $ 2,069
Average Exchange Rate | 136.00% | 130.00%
Foreign exchange contracts | European Union euros |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Notional Amount (U.S. Dollars) | $ 461 | $ 491
Average Exchange Rate | 122.00% | 117.00%
Foreign exchange contracts | Canadian dollars |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Notional Amount (U.S. Dollars) | $ 308 | $ 42
Average Exchange Rate | 78.00% | 77.00%
Foreign exchange contracts | Chilean pesos |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Notional Amount (U.S. Dollars) | $ 255 | $ 0
Average Exchange Rate | 0.00% | 0.00%
Foreign exchange contracts | Peruvian soles |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Notional Amount (U.S. Dollars) | $ 11 | $ 0
Average Exchange Rate | 30.00% | 0.00%

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- Definition The average rate of a hedging instrument. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 23B -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_23B_b&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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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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