REPORTABLE SEGMENTS (Schedule of Net Sales, Operating Income, Depreciation and Amortization, Capital Expenditures and Assets) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 27, 2020	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 29, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 27, 2020	Dec. 29, 2019	Dec. 30, 2018
Net sales
Net sales	$ 3,117,829	$ 3,075,121	$ 2,824,023	$ 3,074,928	$ 3,063,489	$ 2,777,970	$ 2,843,085	$ 2,724,675	$ 2,656,789	$ 2,697,604	$ 2,836,713	$ 2,746,678	$ 12,091,901	$ 11,409,219	$ 10,937,784
Operating income
Total operating income													245,463	690,568	495,686
Interest expense, net of capitalized interest													126,118	132,630	162,812
Interest income													(7,305)	(14,277)	(13,811)
Foreign currency transaction loss													760	6,917	17,160
Gain on bargain purchase		$ 2,000		$ 1,700									3,746	(56,880)	0
Miscellaneous, net													(39,681)	4,633	(2,702)
Income before income taxes													161,825	617,545	332,227
Income tax expense													66,755	161,009	85,423
Net income													95,070	456,536	246,804
Depreciation and amortization													337,104	287,230	274,088
Capital expenditures													354,762	348,120	348,666
Assets	7,474,497				7,102,364								7,474,497	7,102,364
U.S.
Net sales
Net sales													7,496,017	7,636,716	7,425,661
Operating income
Capital expenditures													264,149	269,609	257,913
U.K. and Europe
Net sales
Net sales													3,274,292	2,383,793	2,148,666
Operating income
Capital expenditures													77,597	58,795	58,334
Mexico
Net sales
Net sales													1,321,592	1,388,710	1,363,457
Operating income
Capital expenditures													13,016	19,716	32,419
Operating Segments | U.S.
Operating income
Total operating income													69,377	487,275	291,381
Depreciation and amortization													218,244	207,584	196,079
Assets	5,189,021				5,207,282								5,189,021	5,207,282
Operating Segments | U.K. and Europe
Operating income
Total operating income													102,734	79,182	84,524
Depreciation and amortization													92,673	60,499	50,586
Assets	3,034,219				2,824,382								3,034,219	2,824,382
Operating Segments | Mexico
Operating income
Total operating income													72,879	124,015	119,649
Depreciation and amortization													26,187	19,147	27,423
Assets	1,212,428				1,020,331								1,212,428	1,020,331
Elimination
Net sales
Net sales													210,600	188,900	100,700
Operating income
Total operating income													473	96	132
Assets	$ (1,961,171)				$ (1,949,631)								(1,961,171)	(1,949,631)
U.S.
Net sales
Net sales													7,190,809	7,355,631	7,173,280
Europe
Net sales
Net sales													3,225,717	2,363,017	2,134,822
Mexico
Net sales
Net sales													1,350,588	1,437,081	1,411,727
Asia-Pacific
Net sales
Net sales													252,573	175,898	159,515
Canada, Caribbean and Central America
Net sales
Net sales													30,792	31,808	26,450
Africa
Net sales
Net sales													25,321	28,400	21,286
South America
Net sales
Net sales													$ 16,101	$ 17,384	$ 10,704