PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS (Details) (USD $)	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 7,378,000	$ 7,500,000	$ 15,146,000	$ 15,037,000
Interest cost	12,711,000	13,650,000	25,315,000	26,605,000
Expected return on plan assets	(18,182,000)	(20,110,000)	(36,412,000)	(39,035,000)
Amortization of prior service cost	180,000	207,000	363,000	461,000
Recognized net actuarial loss (gain)	10,001,000	6,817,000	19,778,000	14,086,000
Administrative expenses	162,000	276,000	300,000	416,000
Net periodic benefit cost (income)	12,250,000	8,340,000	24,490,000	17,570,000
Curtailment loss (credit)	0	1,833,000	0	1,833,000
Total amount reflected in earnings	12,250,000	10,173,000	24,490,000	19,403,000
Contributions to pension plans	700,000	1,300,000	1,800,000	2,600,000
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	305,000	348,000	586,000	667,000
Interest cost	3,202,000	3,723,000	6,626,000	7,488,000
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	154,000	(59,000)	309,000	(127,000)
Recognized net actuarial loss (gain)	(33,000)	(30,000)	(50,000)	(36,000)
Administrative expenses	64,000	42,000	95,000	101,000
Net periodic benefit cost (income)	3,692,000	4,024,000	7,566,000	8,093,000
Curtailment loss (credit)		(174,000)		(174,000)
Total amount reflected in earnings	3,692,000	3,850,000	7,566,000	7,919,000
Contributions to pension plans	5,800,000	5,600,000	11,000,000	10,300,000
Non-Qualified Contributions Reimbursement				$ 600,000