Value Creation Plan (Disclosure of costs incurred since the inception of the Value Creation Plan) (Details) - Value Creation Plan [Member] - USD ($) $ in Thousands	Mar. 28, 2020	Dec. 28, 2019	Mar. 30, 2019	Dec. 29, 2018
Restructuring Cost and Reserve [Line Items]
Costs incurred and charged to expense	$ 82,256
Cash payments, net	(58,466)
Non-cash adjustments	(19,561)
Balance payable	4,229	$ 4,227	$ 3,024	$ 913
Asset impairments and facility closure costs [Member]
Restructuring Cost and Reserve [Line Items]
Costs incurred and charged to expense	35,349
Cash payments, net	(10,400)
Non-cash adjustments	(24,575)
Balance payable	374	201	352	477
Employee recruitment, retention and termination costs [Member]
Restructuring Cost and Reserve [Line Items]
Costs incurred and charged to expense	24,024
Cash payments, net	(25,387)
Non-cash adjustments	5,014
Balance payable	3,651	4,026	2,672	436
Professional fees and temporary labor costs [Member]
Restructuring Cost and Reserve [Line Items]
Costs incurred and charged to expense	22,883
Cash payments, net	(22,679)
Non-cash adjustments	0
Balance payable	$ 204	$ 0	$ 0	$ 0