GOODWILL AND INTANGIBLE ASSETS - Schedule of Goodwill by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 1,001,889	$ 887,221
Additions	0	41,936
Other	(1,156)	0
Currency Translation	(50,983)	72,732
Goodwill, end of period	949,750	1,001,889
U.S.
Goodwill [Roll Forward]
Goodwill, beginning of period	41,936	0
Additions	0	41,936
Other	0	0
Currency Translation	0	0
Goodwill, end of period	41,936	41,936
U.K. and Europe
Goodwill [Roll Forward]
Goodwill, beginning of period	834,346	761,614
Additions	0	0
Other	(1,156)	0
Currency Translation	(50,983)	72,732
Goodwill, end of period	782,207	834,346
Mexico
Goodwill [Roll Forward]
Goodwill, beginning of period	125,607	125,607
Additions	0	0
Other	0	0
Currency Translation	0	0
Goodwill, end of period	$ 125,607	$ 125,607