Restructuring Activities - Restructuring Plan Reserve Recorded in Accrued Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Restructuring Reserve [Roll Forward]
Balance, beginning of period	$ 39,568	$ 9,828	$ 0	$ 28,498
Restructuring expense	43,915	7,629	85,864	31,682
Utilized – cash	(17,839)	(13,357)	(17,839)	(41,409)
Utilized – non cash	(16,000)	(1,057)	(18,358)	(15,718)
Foreign currency changes	112	(26)	89	(36)
Balance, end of period	49,756	3,017	49,756	3,017
Manufacturing Optimization Plan
Restructuring Reserve [Roll Forward]
Balance, beginning of period		9,684		25,037
Restructuring expense		7,568		32,016
Utilized – cash		(13,152)		(38,308)
Utilized – non cash		(1,057)		(15,718)
Foreign currency changes		(26)		(10)
Balance, end of period		3,017		3,017
Employee Termination Benefits
Restructuring Reserve [Roll Forward]
Balance, beginning of period	25,298		0
Restructuring expense	4,493		29,814
Utilized – cash	(11,940)		(11,940)
Utilized – non cash	0		0
Foreign currency changes	166		143
Balance, end of period	18,017		18,017
Employee Termination Benefits | Manufacturing Optimization Plan
Restructuring Reserve [Roll Forward]
Balance, beginning of period		9,661		24,958
Restructuring expense		(1)		16
Utilized – cash		(6,617)		(21,951)
Utilized – non cash		(2)		(2)
Foreign currency changes		(26)		(6)
Balance, end of period		3,015		3,015
Employee Termination Benefits | Reorganization Plan
Restructuring Reserve [Roll Forward]
Balance, beginning of period		144		3,461
Restructuring expense		61		(334)
Utilized – cash		(205)		(3,101)
Utilized – non cash		0		0
Foreign currency changes		0		(26)
Balance, end of period		0		0
Contract Termination
Restructuring Reserve [Roll Forward]
Balance, beginning of period	14,270		0
Restructuring expense	23,422		37,692
Utilized – cash	(5,899)		(5,899)
Utilized – non cash	0		0
Foreign currency changes	(54)		(54)
Balance, end of period	31,739		31,739
Non-Current Asset Adjustments
Restructuring Reserve [Roll Forward]
Balance, beginning of period	0		0
Restructuring expense	16,000		18,358
Utilized – cash	0		0
Utilized – non cash	(16,000)		(18,358)
Foreign currency changes	0		0
Balance, end of period	$ 0		$ 0
Non-Current Asset Adjustments | Manufacturing Optimization Plan
Restructuring Reserve [Roll Forward]
Balance, beginning of period		0		0
Restructuring expense		719		14,684
Utilized – cash		0		0
Utilized – non cash		(719)		(14,684)
Foreign currency changes		0		0
Balance, end of period		0		0
Other Costs | Manufacturing Optimization Plan
Restructuring Reserve [Roll Forward]
Balance, beginning of period		23		79
Restructuring expense		6,850		17,316
Utilized – cash		(6,535)		(16,357)
Utilized – non cash		(336)		(1,032)
Foreign currency changes		0		(4)
Balance, end of period		$ 2		$ 2