Restructuring Activities - Restructuring Plan Reserve Recorded in Accrued Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Restructuring Reserve [Roll Forward]
Balance, beginning of period	$ 7,474	$ 0	$ 23,920	$ 0
Restructuring (benefit) expense	918	41,949	552	41,949
Utilized – cash	(4,693)	0	(21,136)	0
Utilized – non cash	(276)	(2,358)	251	(2,358)
Foreign currency changes	(93)	(23)	(257)	(23)
Balance, end of period	3,330	39,568	3,330	39,568
Employee Termination Benefits
Restructuring Reserve [Roll Forward]
Balance, beginning of period	3,007	0	7,724	0
Restructuring (benefit) expense	(22)	25,321	(966)	25,321
Utilized – cash	(1,685)	0	(5,346)	0
Utilized – non cash	0	0	0	0
Foreign currency changes	(54)	(23)	(166)	(23)
Balance, end of period	1,246	25,298	1,246	25,298
Contract Terminations & Other
Restructuring Reserve [Roll Forward]
Balance, beginning of period	4,467	0	16,196	0
Restructuring (benefit) expense	664	14,270	1,769	14,270
Utilized – cash	(3,008)	0	(15,790)	0
Utilized – non cash	0	0	0	0
Foreign currency changes	(39)	0	(91)	0
Balance, end of period	2,084	14,270	2,084	14,270
Non-Current Asset Adjustments
Restructuring Reserve [Roll Forward]
Balance, beginning of period	0	0	0	0
Restructuring (benefit) expense	276	2,358	(251)	2,358
Utilized – cash	0	0	0	0
Utilized – non cash	(276)	(2,358)	251	(2,358)
Foreign currency changes	0	0	0	0
Balance, end of period	$ 0	$ 0	$ 0	$ 0