REVENUE RECOGNITION - Disaggregated Revenue (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
Disaggregation of Revenue [Line Items]
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
Domestic
Disaggregation of Revenue [Line Items]
Net sales													11,488,009	10,848,213
Export
Disaggregation of Revenue [Line Items]
Net sales													603,892	561,006
U.S.
Disaggregation of Revenue [Line Items]
Net sales													7,496,017	7,636,716	7,425,661
U.S. | Domestic
Disaggregation of Revenue [Line Items]
Net sales													7,189,539	7,353,925
U.S. | Export
Disaggregation of Revenue [Line Items]
Net sales													306,478	282,791
U.K. and Europe
Disaggregation of Revenue [Line Items]
Net sales													3,274,292	2,383,793	2,148,666
U.K. and Europe | Domestic
Disaggregation of Revenue [Line Items]
Net sales													2,976,878	2,105,578
U.K. and Europe | Export
Disaggregation of Revenue [Line Items]
Net sales													297,414	278,215
Mexico
Disaggregation of Revenue [Line Items]
Net sales													1,321,592	1,388,710	$ 1,363,457
Mexico | Domestic
Disaggregation of Revenue [Line Items]
Net sales													1,321,592	1,388,710
Mexico | Export
Disaggregation of Revenue [Line Items]
Net sales													$ 0	$ 0