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DERIVATIVE FINANCIAL INSTRUMENTS (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 25, 2017
Jun. 26, 2016
Jun. 25, 2017
Jun. 26, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]        
Net gains (losses) on derivative financial instruments $ 3.2 $ 1.8 $ 0.4 $ 5.9