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ACCOUNTING POLICIES ACCOUNTING POLICIES (Critical accounting estimates) (Details) - USD ($) $ in Millions	12 Months Ended
	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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- 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.

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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.

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- Definition

The amount of expense recognised related to the write-down of inventories to net realisable value. [Refer: Inventories]

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The amount of liabilities of uncertain timing or the amount recognised when: (a) the entity has a present obligation (legal or constructive) as a result of a past event; (b) it is probable (ie more likely than not) that an outflow of resources embodying economic benefits will be required to settle the obligation; and (c) a reliable estimate can be made of the amount of the obligation.

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Valuation Allowances and Reserves, Balance

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