STOCKHOLDERS' EQUITY (Schedule of Reclassification from Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Dec. 25, 2016
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Cost of sales	$ (10,094,308)	$ (9,296,249)	$ (8,774,581)
Miscellaneous, net	2,702	6,538	9,344
Interest income	13,811	7,730	2,301
2018-Miscellaneous, net; 2017-SG&A expense	(343,025)	(389,517)	(310,832)
Income before income taxes	332,227	982,066	724,036
Income tax expense	(85,423)	(263,899)	(243,919)
Net income	246,804	718,167	$ 480,117
Total | Amount Reclassified from Accumulated Other Comprehensive Loss
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Income before income taxes	(433)	(259)
Income tax expense	21	340
Net income	(412)	81
Realized gain (loss) on settlement of derivative financial instruments classified as cash flow hedges | Amount Reclassified from Accumulated Other Comprehensive Loss
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Cost of sales	(348)	639
Realized gain on sale of securities | Amount Reclassified from Accumulated Other Comprehensive Loss
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Interest income	1,118	34
Amortization of pension and other postretirement plan actuarial losses | Amount Reclassified from Accumulated Other Comprehensive Loss | Union plan
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Cost of sales		(24)
Miscellaneous, net	(49)
Amortization of pension and other postretirement plan actuarial losses | Amount Reclassified from Accumulated Other Comprehensive Loss | Legacy Gold Kits Plans
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Cost of sales		(283)
Miscellaneous, net	(360)
Amortization of pension and other postretirement plan actuarial losses | Amount Reclassified from Accumulated Other Comprehensive Loss | Legacy Gold Kits Plans
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Miscellaneous, net	$ (794)
2018-Miscellaneous, net; 2017-SG&A expense		$ (625)