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ACCOUTNING POLICIES (Derivative financial instruments and hedging activities) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash flow hedges
Derivative instruments, gain (loss) [Line Items]
Effective portion of hedge	$ 0.7	$ 0.1

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- Definition

Derivative Instruments, Gain Recognized in Other Comprehensive Income (Loss), Effective Portion

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- Definition

[Line Items] for Derivative instruments, gain (loss) [Table]

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No definition available.

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- Details

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