PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS - COMPONENTS OF NET PERIODIC BENEFIT COST (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2016	Jul. 05, 2015	Jul. 03, 2016	Jul. 05, 2015
Pension Benefits
Amounts recognized in net periodic benefit cost
Service cost	$ 5,699	$ 6,810	$ 11,583	$ 14,233
Interest cost	10,999	10,857	21,834	22,162
Expected return on plan assets	(14,832)	(17,158)	(29,373)	(34,539)
Amortization of prior service (credit) cost	(261)	(296)	(523)	(587)
Amortization of net loss (gains)	8,801	7,232	17,608	15,304
Net periodic benefit cost	10,406	7,445	21,129	16,573
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements	16,938	0	16,938	0
Total net periodic benefit cost	27,344	7,445	38,067	16,573
Other Benefits
Amounts recognized in net periodic benefit cost
Service cost	75	99	149	271
Interest cost	2,429	2,513	4,865	5,101
Expected return on plan assets	0	0	0	0
Amortization of prior service (credit) cost	144	153	288	306
Amortization of net loss (gains)	6	(29)	(6)	(29)
Net periodic benefit cost	2,654	2,736	5,296	5,649
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements	0	0	0	0
Total net periodic benefit cost	$ 2,654	$ 2,736	$ 5,296	$ 5,649