Guarantor Financial Information (Condensed Consolidated Balance Sheet) (Details) - USD ($) $ in Thousands	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018
ASSETS
Cash and cash equivalents	$ 65,845			$ 72,935
Restricted cash	110			110
Accounts receivable	373,583			406,338
Inventories	406,805			362,957
Income taxes refundable	3,940			3,317
Prepaid expenses	52,359			46,599
Other current assets	28,532			25,032
Total current assets	931,174			917,288
Investment in subsidiaries	0			0
Property, plant and equipment, net	1,789,172			1,802,411
Intangible assets, net	474,793			526,394
Goodwill	1,239,343			1,223,291
Investment in unconsolidated subsidiaries	742,875			689,354
Operating right-of-use assets, net	142,269			124,726
Other assets	45,598			47,400
Deferred income taxes	15,762			14,394
Total assets	5,380,986			5,345,258
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current portion of long-term debt	26,185			90,996
Accounts payable	206,998			239,252
Income taxes payable	19,013			8,895
Operating lease liability, current	40,973			37,805
Accrued expenses	330,385			311,391
Total current liabilities	623,554			688,339
Long-term debt, net of current portion	1,448,019			1,558,429
Operating lease liability, non-current	105,821			91,424
Other non-current liabilities	102,559			115,785
Deferred income taxes	265,844			247,931
Total liabilities	2,545,797			2,701,908
Total stockholders’ equity	2,835,189	$ 2,698,354	$ 2,608,442	2,643,350	$ 2,372,892	$ 2,406,635	$ 2,356,699	$ 2,335,821
Total liabilities and stockholders' equity	5,380,986			5,345,258
Parent [Member]
ASSETS
Cash and cash equivalents	717			551
Restricted cash	103			103
Accounts receivable	39,557			51,097
Inventories	22,371			26,893
Income taxes refundable	1,557			1,106
Prepaid expenses	27,212			20,888
Other current assets	3,257			5,399
Total current assets	94,774			106,037
Investment in subsidiaries	5,739,060			5,365,956
Property, plant and equipment, net	432,303			434,237
Intangible assets, net	40,172			44,404
Goodwill	49,902			49,902
Investment in unconsolidated subsidiaries	0			0
Operating right-of-use assets, net	85,490			74,005
Other assets	39,192			35,456
Deferred income taxes	0			0
Total assets	6,480,893			6,109,997
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current portion of long-term debt	6,503			40,916
Accounts payable	1,166,310			893,490
Income taxes payable	2,118			(10)
Operating lease liability, current	21,679			20,454
Accrued expenses	107,147			116,758
Total current liabilities	1,303,757			1,071,608
Long-term debt, net of current portion	947,431			1,040,974
Operating lease liability, non-current	69,276			58,970
Other non-current liabilities	68,474			80,409
Deferred income taxes	144,236			122,109
Total liabilities	2,533,174			2,374,070
Total stockholders’ equity	3,947,719			3,735,927
Total liabilities and stockholders' equity	6,480,893			6,109,997
Guarantors [Member]
ASSETS
Cash and cash equivalents	24			26
Restricted cash	0			0
Accounts receivable	738,574			702,945
Inventories	96,942			86,609
Income taxes refundable	0			0
Prepaid expenses	2,496			2,241
Other current assets	(4,072)			(2,326)
Total current assets	833,964			789,495
Investment in subsidiaries	1,283,699			1,366,635
Property, plant and equipment, net	512,587			524,577
Intangible assets, net	148,029			170,581
Goodwill	490,748			490,748
Investment in unconsolidated subsidiaries	0			0
Operating right-of-use assets, net	30,174			31,243
Other assets	134			134
Deferred income taxes	0			0
Total assets	3,299,335			3,373,413
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current portion of long-term debt	11			10
Accounts payable	26,363			29,535
Income taxes payable	0			0
Operating lease liability, current	10,752			10,510
Accrued expenses	28,786			32,861
Total current liabilities	65,912			72,916
Long-term debt, net of current portion	22			30
Operating lease liability, non-current	19,158			20,281
Other non-current liabilities	0			0
Deferred income taxes	0			0
Total liabilities	85,092			93,227
Total stockholders’ equity	3,214,243			3,280,186
Total liabilities and stockholders' equity	3,299,335			3,373,413
Non-guarantors [Member]
ASSETS
Cash and cash equivalents	65,104			72,358
Restricted cash	7			7
Accounts receivable	732,110			518,614
Inventories	287,492			249,455
Income taxes refundable	2,383			2,211
Prepaid expenses	22,651			23,470
Other current assets	34,502			40,872
Total current assets	1,144,249			906,987
Investment in subsidiaries	844,045			844,043
Property, plant and equipment, net	844,282			843,597
Intangible assets, net	286,592			311,409
Goodwill	698,693			682,641
Investment in unconsolidated subsidiaries	742,875			689,354
Operating right-of-use assets, net	26,605			19,478
Other assets	99,320			61,974
Deferred income taxes	15,762			14,394
Total assets	4,702,423			4,373,877
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current portion of long-term debt	24,826			68,983
Accounts payable	150,976			182,484
Income taxes payable	16,895			8,905
Operating lease liability, current	8,542			6,841
Accrued expenses	194,459			161,833
Total current liabilities	395,698			429,046
Long-term debt, net of current portion	593,614			567,589
Operating lease liability, non-current	17,387			12,173
Other non-current liabilities	34,085			35,376
Deferred income taxes	121,608			125,822
Total liabilities	1,162,392			1,170,006
Total stockholders’ equity	3,540,031			3,203,871
Total liabilities and stockholders' equity	4,702,423			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	(1,136,658)			(866,318)
Inventories	0			0
Income taxes refundable	0			0
Prepaid expenses	0			0
Other current assets	(5,155)			(18,913)
Total current assets	(1,141,813)			(885,231)
Investment in subsidiaries	(7,866,804)			(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	(93,048)			(50,164)
Deferred income taxes	0			0
Total assets	(9,101,665)			(8,512,029)
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current portion of long-term debt	(5,155)			(18,913)
Accounts payable	(1,136,651)			(866,257)
Income taxes payable	0			0
Accrued expenses	(7)			(61)
Total current liabilities	(1,141,813)			(885,231)
Long-term debt, net of current portion	(93,048)			(50,164)
Other non-current liabilities	0			0
Deferred income taxes	0			0
Total liabilities	(1,234,861)			(935,395)
Total stockholders’ equity	(7,866,804)			(7,576,634)
Total liabilities and stockholders' equity	$ (9,101,665)			$ (8,512,029)