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FAIR VALUE OF FINANCIAL INSTRUMENTS FAIR VALUE OF FINANCIAL INSTRUMENTS - Allocation of Financial Instruments - Additional Information (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |  |
Preferred shares | $ 20 | $ 20
Financial assets (current and non-current) |  |
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |  |
Financial instruments designated as hedging instruments, at fair value | 718 | 464
Financial liabilities (current and non-current) |  |
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |  |
Financial instruments designated as hedging instruments, at fair value | $ 109 | $ 146

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- Definition [Line Items] for Disclosure Of Fair Value Measurement Of Assets And Liabilities [Table] + References No definition available. + Details
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- Definition Preferred Shares + References No definition available. + Details
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- Definition The fair value of financial instruments designated as hedging instruments. Hedging instruments are designated derivatives or (for a hedge of the risk of changes in foreign currency exchange rates only) designated non-derivative financial assets or non-derivative financial liabilities whose fair value or cash flows are expected to offset changes in the fair value or cash flows of a designated hedged item. [Refer: At fair value [member]; Derivatives [member]; Derivative financial assets; Derivative financial liabilities; Financial instruments, class [member]; Financial assets; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 22 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_22_b&doctype=Standard&book=B -URIDate 2017-03-09 + Details
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- Details
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- Details
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