EMPLOYEE BENEFITS (Details 6) (Pension plans, USD $) In Thousands, unless otherwise specified			0 Months Ended			12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Jan. 14, 2011 Real Estate item	Dec. 29, 2013 Real Estate	Dec. 30, 2012 Real Estate	Dec. 29, 2013 Level 3	Dec. 30, 2012 Level 3	Dec. 29, 2013 Level 3 Real Estate	Dec. 30, 2012 Level 3 Real Estate	Dec. 29, 2013 Level 3 Private Equity	Dec. 30, 2012 Level 3 Private Equity
Summary of changes in the fair value of the plan's Level 3 investment assets
Fair value of plan assets, beginning of year	$ 1,426,678	$ 1,352,711		$ 52,265	$ 51,579	$ 57,987	$ 59,429	$ 51,579	$ 50,530	$ 6,408	$ 8,899
Realized gains						4,817	3,774	4,817	3,747		27
Transfer in or out of level 3						(4,984)	(7,567)	(4,817)	(3,747)	(167)	(3,820)
Unrealized gains						1,612	2,351	686	1,049	926	1,302
Fair value of plan assets, end of year	$ 1,426,678	$ 1,352,711		$ 52,265	$ 51,579	$ 59,432	$ 57,987	$ 52,265	$ 51,579	$ 7,167	$ 6,408
Additional disclosures on plan assets
Number of locations from which properties were contributed			7