STOCKHOLDERS' EQUITY (Schedule of Changes in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2021	Sep. 27, 2020	Sep. 26, 2021	Sep. 27, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period	$ 2,594,512	$ 2,374,399	$ 2,575,347	$ 2,536,060
Other comprehensive income (loss) before reclassifications			37,863	(90,157)
Amounts reclassified from accumulated other comprehensive income to net income			(61)	(207)
Currency translation			16	(27)
Total other comprehensive income (loss), net of tax	(42,156)	57,907	37,818	(90,391)
Balance, end of period	2,616,383	2,431,312	2,616,383	2,431,312
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period	59,354	(223,427)	(20,620)	(75,129)
Total other comprehensive income (loss), net of tax	(42,156)	57,907	37,818	(90,391)
Balance, end of period	17,198	(165,520)	17,198	(165,520)
Gains (Losses) Related to Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			82,782	(1,108)
Other comprehensive income (loss) before reclassifications			13,135	(48,921)
Amounts reclassified from accumulated other comprehensive income to net income			0	0
Currency translation			0	0
Total other comprehensive income (loss), net of tax			13,135	(48,921)
Balance, end of period	95,917	(50,029)	95,917	(50,029)
Gains (Losses) on Derivative Financial Instruments Classified as Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			(1,191)	(2,406)
Other comprehensive income (loss) before reclassifications			1,204	3,403
Amounts reclassified from accumulated other comprehensive income to net income			(1,261)	(1,039)
Currency translation			16	(27)
Total other comprehensive income (loss), net of tax			(41)	2,337
Balance, end of period	(1,232)	(69)	(1,232)	(69)
Losses Related to Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			(102,211)	(71,615)
Other comprehensive income (loss) before reclassifications			23,524	(44,641)
Amounts reclassified from accumulated other comprehensive income to net income			1,200	846
Currency translation			0	0
Total other comprehensive income (loss), net of tax			24,724	(43,795)
Balance, end of period	(77,487)	(115,410)	(77,487)	(115,410)
Gains (losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			0	0
Other comprehensive income (loss) before reclassifications			0	2
Amounts reclassified from accumulated other comprehensive income to net income			0	(14)
Currency translation			0	0
Total other comprehensive income (loss), net of tax			0	(12)
Balance, end of period	$ 0	$ (12)	$ 0	$ (12)