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ACCOUNTING POLICIES (Critical accounting estimates) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Disclosure of changes in accounting estimates [line items] |  |
Discount rate used to test investment for impairment | 11.68% |
Inventory write-down | $ 55.5 | $ 36.2
Legal claims and other matters |  |
Disclosure of changes in accounting estimates [line items] |  |
Provisions | 643.9 | 768.5
Allowance for Doubtful Accounts |  |
Disclosure of changes in accounting estimates [line items] |  |
Valuation allowance | $ 14.3 | $ 16.5

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- Definition The discount rate used in the current estimate of the present value of the future cash flows expected to be derived from an asset or cash-generating unit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 130 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_130_g&doctype=Standard -URIDate 2017-03-09 + Details
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