BUSINESS ACQUISITION (Narrative) (Details) bird / WK in Millions, $ in Millions		3 Months Ended
	Jan. 06, 2017 USD ($) employee bird / WK plant	Mar. 26, 2017 USD ($) employee bird / WK
Business Acquisition [Line Items]
Maximum processing capacity of employees per week (in birds per week) | bird / WK		39.2
Number of employees of acquiree | employee		41,900
GNP
Business Acquisition [Line Items]
Percentage of equity acquired	100.00%
Maximum processing capacity of employees per week (in birds per week) | bird / WK	2.1
Number of processing plants acquired | plant	3
Number of employees of acquiree | employee	1,700
Purchase price, amount payable	$ 2.5
Transaction costs	$ 0.3
Net sales of acquiree since acquisition date		$ 97.8
Net income of acquiree since acquisition date		$ 4.6