Guarantor Financial Information (Condensed Consolidated Balance Sheet) (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018
ASSETS
Cash and cash equivalents	$ 76,185		$ 72,935
Restricted cash	103		110
Accounts receivable	375,908		406,338
Inventories	394,708		362,957
Income taxes refundable	3,752		3,317
Prepaid expenses	46,003		46,599
Other current assets	34,392		25,032
Total current assets	931,051		917,288
Investment in subsidiaries	0		0
Property, plant and equipment, net	1,773,329		1,802,411
Intangible assets, net	485,148		526,394
Goodwill	1,217,177		1,223,291
Investment in unconsolidated subsidiaries	729,094		689,354
Operating right-of-use assets, net	134,901		124,726
Other assets	41,651		47,400
Deferred income taxes	14,803		14,394
Total assets	5,327,154		5,345,258
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current portion of long-term debt	42,758		90,996
Accounts payable	197,528		239,252
Income taxes payable	16,474		8,895
Operating lease liability, current	39,532		37,805
Accrued expenses	310,004		311,391
Total current liabilities	606,296		688,339
Long-term debt, net of current portion	1,553,118		1,558,429
Operating lease liability, non-current	99,482		91,424
Other non-current liabilities	109,046		115,785
Deferred income taxes	260,858		247,931
Total liabilities	2,628,800		2,701,908
Total stockholders’ equity	2,698,354	$ 2,608,442	2,643,350	$ 2,406,635	$ 2,356,699	$ 2,335,821
Total liabilities and stockholders' equity	5,327,154		5,345,258
Parent [Member]
ASSETS
Cash and cash equivalents	968		551
Restricted cash	103		103
Accounts receivable	45,605		51,097
Inventories	21,711		26,893
Income taxes refundable	1,322		1,106
Prepaid expenses	18,001		20,888
Other current assets	7,528		5,399
Total current assets	95,238		106,037
Investment in subsidiaries	5,602,453		5,365,956
Property, plant and equipment, net	432,057		434,237
Intangible assets, net	41,583		44,404
Goodwill	49,902		49,902
Investment in unconsolidated subsidiaries	0		0
Operating right-of-use assets, net	79,306		74,005
Other assets	34,704		35,456
Deferred income taxes	0		0
Total assets	6,335,243		6,109,997
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current portion of long-term debt	20,315		40,916
Accounts payable	1,033,477		893,490
Income taxes payable	2,882		(10)
Operating lease liability, current	20,873		20,454
Accrued expenses	93,432		116,758
Total current liabilities	1,170,979		1,071,608
Long-term debt, net of current portion	1,032,352		1,040,974
Operating lease liability, non-current	63,948		58,970
Other non-current liabilities	75,902		80,409
Deferred income taxes	142,606		122,109
Total liabilities	2,485,787		2,374,070
Total stockholders’ equity	3,849,456		3,735,927
Total liabilities and stockholders' equity	6,335,243		6,109,997
Guarantors [Member]
ASSETS
Cash and cash equivalents	25		26
Restricted cash	0		0
Accounts receivable	694,352		702,945
Inventories	96,458		86,609
Income taxes refundable	0		0
Prepaid expenses	3,316		2,241
Other current assets	(3,720)		(2,326)
Total current assets	790,431		789,495
Investment in subsidiaries	1,283,699		1,366,635
Property, plant and equipment, net	518,120		524,577
Intangible assets, net	155,546		170,581
Goodwill	490,748		490,748
Investment in unconsolidated subsidiaries	0		0
Operating right-of-use assets, net	29,662		31,243
Other assets	134		134
Deferred income taxes	0		0
Total assets	3,268,340		3,373,413
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current portion of long-term debt	11		10
Accounts payable	19,961		29,535
Income taxes payable	0		0
Operating lease liability, current	10,520		10,510
Accrued expenses	26,689		32,861
Total current liabilities	57,181		72,916
Long-term debt, net of current portion	25		30
Operating lease liability, non-current	18,767		20,281
Other non-current liabilities	0		0
Deferred income taxes	0		0
Total liabilities	75,973		93,227
Total stockholders’ equity	3,192,367		3,280,186
Total liabilities and stockholders' equity	3,268,340		3,373,413
Non-guarantors [Member]
ASSETS
Cash and cash equivalents	75,192		72,358
Restricted cash	0		7
Accounts receivable	642,619		518,614
Inventories	276,539		249,455
Income taxes refundable	2,430		2,211
Prepaid expenses	24,686		23,470
Other current assets	44,049		40,872
Total current assets	1,065,515		906,987
Investment in subsidiaries	844,045		844,043
Property, plant and equipment, net	823,152		843,597
Intangible assets, net	288,019		311,409
Goodwill	676,527		682,641
Investment in unconsolidated subsidiaries	729,094		689,354
Operating right-of-use assets, net	25,933		19,478
Other assets	57,258		61,974
Deferred income taxes	14,803		14,394
Total assets	4,524,346		4,373,877
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current portion of long-term debt	35,897		68,983
Accounts payable	150,752		182,484
Income taxes payable	13,592		8,905
Operating lease liability, current	8,139		6,841
Accrued expenses	189,889		161,833
Total current liabilities	398,269		429,046
Long-term debt, net of current portion	571,186		567,589
Operating lease liability, non-current	16,767		12,173
Other non-current liabilities	33,144		35,376
Deferred income taxes	118,252		125,822
Total liabilities	1,137,618		1,170,006
Total stockholders’ equity	3,386,728		3,203,871
Total liabilities and stockholders' equity	4,524,346		4,373,877
Eliminations [Member]
ASSETS
Operating right-of-use assets, net	0		0
LIABILITIES AND STOCKHOLDERS’ EQUITY
Operating lease liability, current	0		0
Operating lease liability, non-current	0		0
Eliminations [Member]
ASSETS
Cash and cash equivalents	0		0
Restricted cash	0		0
Accounts receivable	(1,006,668)		(866,318)
Inventories	0		0
Income taxes refundable	0		0
Prepaid expenses	0		0
Other current assets	(13,465)		(18,913)
Total current assets	(1,020,133)		(885,231)
Investment in subsidiaries	(7,730,197)		(7,576,634)
Property, plant and equipment, net	0		0
Intangible assets, net	0		0
Goodwill	0		0
Investment in unconsolidated subsidiaries	0		0
Other assets	(50,445)		(50,164)
Deferred income taxes	0		0
Total assets	(8,800,775)		(8,512,029)
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current portion of long-term debt	(13,465)		(18,913)
Accounts payable	(1,006,662)		(866,257)
Income taxes payable	0		0
Accrued expenses	(6)		(61)
Total current liabilities	(1,020,133)		(885,231)
Long-term debt, net of current portion	(50,445)		(50,164)
Other non-current liabilities	0		0
Deferred income taxes	0		0
Total liabilities	(1,070,578)		(935,395)
Total stockholders’ equity	(7,730,197)		(7,576,634)
Total liabilities and stockholders' equity	$ (8,800,775)		$ (8,512,029)