Reorganization and Realignment Costs G&A Realignment Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 04, 2021	Mar. 29, 2020
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 4,934	$ 3,910
G&A Realignment
Restructuring Cost and Reserve
Reorganization and realignment costs	(18)	267
Restructuring and Related Cost, Incurred Cost	(29)	168
Restructuring and Related Cost, Cost Incurred to Date	29,336
Restructuring Charges, Incurred to Date	38,793
G&A Realignment | Severance and related employee costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	(31)	152
Restructuring and Related Cost, Cost Incurred to Date	24,235
G&A Realignment | Recruitment and relocation costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	1	15
Restructuring and Related Cost, Cost Incurred to Date	2,877
G&A Realignment | Third-party and other costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	1	1
Restructuring and Related Cost, Cost Incurred to Date	2,224
G&A Realignment | Share-based compensation
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	11	99
Restructuring and Related Cost, Cost Incurred to Date	8,122
G&A Realignment | Termination of defined benefit plans
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	0	$ 0
Restructuring and Related Cost, Cost Incurred to Date	$ 1,335