REPORTABLE SEGMENTS - Schedule of Segment Reporting, Goodwill and Assets (Details) - USD ($) $ in Thousands	Jun. 27, 2021	Dec. 27, 2020
Segment Reporting Information [Line Items]
Assets	$ 7,748,845	$ 7,474,497
Long-lived assets	2,972,778	2,946,377
Eliminations
Segment Reporting Information [Line Items]
Assets	(1,961,386)	(1,961,171)
Long-lived assets	(3,756)	(3,783)
U.S. | Operating Segments
Segment Reporting Information [Line Items]
Assets	5,502,300	5,189,021
Long-lived assets	1,843,412	1,815,460
U.K. and Europe | Operating Segments
Segment Reporting Information [Line Items]
Assets	3,108,881	3,034,219
Long-lived assets	852,059	842,049
Mexico | Operating Segments
Segment Reporting Information [Line Items]
Assets	1,099,050	1,212,428
Long-lived assets	$ 281,063	$ 292,651