Reorganization and Realignment Costs G&A Realignment Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Oct. 03, 2021	Sep. 27, 2020
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 345	$ 3,375	$ 7,381	$ 10,196
G&A Realignment
Restructuring Cost and Reserve
Reorganization and realignment costs	(7)	(49)	(41)	282
Restructuring and Related Cost, Incurred Cost	(7)	(80)	(60)	82
Restructuring and Related Cost, Cost Incurred to Date	29,305		29,305
Restructuring Charges, Incurred to Date	38,770		38,770
G&A Realignment | Severance and related employee costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	(8)	(116)	(61)	30
Restructuring and Related Cost, Cost Incurred to Date	24,205		24,205
G&A Realignment | Recruitment and relocation costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	1	27	1	42
Restructuring and Related Cost, Cost Incurred to Date	2,877		2,877
G&A Realignment | Third-party and other costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	0	9	0	10
Restructuring and Related Cost, Cost Incurred to Date	2,223		2,223
G&A Realignment | Share-based compensation
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	0	31	19	200
Restructuring and Related Cost, Cost Incurred to Date	8,130		8,130
G&A Realignment | Termination of defined benefit plans
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	0	$ 0	0	$ 0
Restructuring and Related Cost, Cost Incurred to Date	$ 1,335		$ 1,335