STOCKHOLDERS' EQUITY (Schedule of Reclassification from Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 27, 2020	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 29, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 27, 2020	Dec. 29, 2019	Dec. 30, 2018
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Net sales	$ 3,117,829	$ 3,075,121	$ 2,824,023	$ 3,074,928	$ 3,063,489	$ 2,777,970	$ 2,843,085	$ 2,724,675	$ 2,656,789	$ 2,697,604	$ 2,836,713	$ 2,746,678	$ 12,091,901	$ 11,409,219	$ 10,937,784
Cost of sales													(11,253,705)	(10,338,825)	(10,094,308)
Interest expense, net of capitalized interest													(126,118)	(132,630)	(162,812)
Interest income													7,305	14,277	13,811
Miscellaneous, net													39,681	(4,633)	2,702
Income before income taxes													161,825	617,545	332,227
Tax expense													(66,755)	(161,009)	(85,423)
Net income													95,070	456,536	$ 246,804
Amount Reclassified from Accumulated Other Comprehensive Loss
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Income before income taxes													1,234	(1,077)
Tax expense													357	169
Net income													1,591	(908)
Unrealized Losses on 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:
Net sales													2,987	0
Cost of sales													(114)	(383)
Interest expense, net of capitalized interest													(209)	0
Unrealized Holding Gains on Available-for-Sale Securities | Amount Reclassified from Accumulated Other Comprehensive Loss
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Interest income													73	619
Losses Related to Pension and Other Postretirement Benefits | Amount Reclassified from Accumulated Other Comprehensive Loss
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Miscellaneous, net													$ (1,503)	$ (1,313)