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ACCOUNTING POLICIES ACCOUNTING POLICIES (Critical accounting estimates) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Disclosure of changes in accounting estimates [line items] |  |
Discount rate used to test investment for impairment | 11.49% |
Inventory write-down | $ 36.2 | $ 33.4
Legal claims and other matters |  |
Disclosure of changes in accounting estimates [line items] |  |
Provisions | 768.5 | 7.0
Allowance for Doubtful Accounts |  |
Disclosure of changes in accounting estimates [line items] |  |
Valuation allowance | $ 16.5 | $ 6.0

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