DERIVATIVE INSTRUMENTS (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net derivative losses on closed hedge instruments in AOCI that will be realized in earnings when the hedged items impact earnings	$ 0.1	$ 7.5
Net AOCI hedging component	7.0
Net current deferred losses expected to be realized in the next twelve months	$ 6.5