STOCKHOLDERS' EQUITY (Schedule of Reclassification from Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Net sales	$ 3,637,698	$ 2,824,023	$ 6,911,123	$ 5,898,951
Cost of sales	3,257,457	2,704,164	6,269,639	5,601,993
Interest expense, net of capitalized interest	(50,651)	(32,323)	(80,985)	(65,011)
Interest income	842	1,158	3,208	2,848
Miscellaneous, net	770	45	8,614	34,233
Income (loss) before income taxes	(176,315)	(9,356)	(40,489)	96,605
Tax expense	9,812	2,956	(25,546)	(35,556)
Net income (loss)	$ (166,503)	$ (6,400)	(66,035)	61,049
Amount Reclassified from Accumulated Other Comprehensive Loss
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Income (loss) before income taxes			293	(1,319)
Tax expense			297	184
Net income (loss)			590	(1,135)
Amount Reclassified from Accumulated Other Comprehensive Loss | Realized gain (loss) on settlement of derivatives classified as cash flow hedges
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Net sales			1,282	(582)
Cost of sales			255	0
Interest expense, net of capitalized interest			(289)	2
Amount Reclassified from Accumulated Other Comprehensive Loss | Realized gain on sale of securities
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Interest income			0	12
Amount Reclassified from Accumulated Other Comprehensive Loss | Amortization of defined benefit pension and other postretirement plan actuarial losses
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Miscellaneous, net			$ (955)	$ (751)