REPORTABLE SEGMENTS - Schedule of Segment Reporting, Goodwill and Assets (Details) - USD ($) $ in Thousands	Mar. 28, 2021	Dec. 27, 2020
Segment Reporting Information [Line Items]
Assets	$ 7,480,761	$ 7,474,497
Long-lived assets	2,962,164	2,946,377
Eliminations
Segment Reporting Information [Line Items]
Assets	(1,961,855)	(1,961,171)
Long-lived assets	(3,770)	(3,783)
U.S. | Operating Segments
Segment Reporting Information [Line Items]
Assets	5,265,188	5,189,021
Long-lived assets	1,843,425	1,815,460
U.K. and Europe | Operating Segments
Segment Reporting Information [Line Items]
Assets	3,044,968	3,034,219
Long-lived assets	837,729	842,049
Mexico | Operating Segments
Segment Reporting Information [Line Items]
Assets	1,132,460	1,212,428
Long-lived assets	$ 284,780	$ 292,651