STOCKHOLDERS' EQUITY (Schedule of Changes in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period	$ 2,476,491	$ 2,144,500	$ 2,536,060	$ 2,019,585
Other comprehensive income (loss) before reclassifications			(149,331)	(2,949)
Amounts reclassified from accumulated other comprehensive income (loss) to net income			1,135	92
Currency translation			(102)	12
Total other comprehensive loss, net of tax	(48,510)	(41,753)	(148,298)	(2,845)
Balance, end of period	2,374,399	2,273,264	2,374,399	2,273,264
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period	(174,917)	(88,926)	(75,129)	(127,834)
Total other comprehensive loss, net of tax	(48,510)	(41,753)	(148,298)	(2,845)
Balance, end of period	(223,427)	(130,679)	(223,427)	(130,679)
Losses Related to Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			(1,108)	(55,770)
Other comprehensive income (loss) before reclassifications			(115,547)	(611)
Amounts reclassified from accumulated other comprehensive income (loss) to net income			0	0
Currency translation			0	0
Total other comprehensive loss, net of tax			(115,547)	(611)
Balance, end of period	(116,655)	(56,381)	(116,655)	(56,381)
Unrealized Gains on Derivative Financial Instruments Classified as Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			(2,406)	(683)
Other comprehensive income (loss) before reclassifications			2,003	388
Amounts reclassified from accumulated other comprehensive income (loss) to net income			580	(173)
Currency translation			(102)	12
Total other comprehensive loss, net of tax			2,481	227
Balance, end of period	75	(456)	75	(456)
Losses Related to Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			(71,615)	(71,463)
Other comprehensive income (loss) before reclassifications			(35,797)	(2,873)
Amounts reclassified from accumulated other comprehensive income (loss) to net income			564	496
Currency translation			0	0
Total other comprehensive loss, net of tax			(35,233)	(2,377)
Balance, end of period	(106,848)	(73,840)	(106,848)	(73,840)
Unrealized Holding Gains (Losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			0	82
Other comprehensive income (loss) before reclassifications			10	147
Amounts reclassified from accumulated other comprehensive income (loss) to net income			(9)	(231)
Currency translation			0	0
Total other comprehensive loss, net of tax			1	(84)
Balance, end of period	$ 1	$ (2)	$ 1	$ (2)