Restructuring - Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 04, 2021	Mar. 29, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	$ 3,766	$ 1,576
Cumulative To Date	82,488
January 2021 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	3,684	0
Cumulative To Date	3,684
December 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	84	1,639
Cumulative To Date	10,164
Other Legacy Restructuring Plans
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	(2)	(63)
Cumulative To Date	68,640
Severance and benefits | January 2021 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	3,671	0
Cumulative To Date	3,671
Severance and benefits | December 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	(28)	1,639
Cumulative To Date	10,005
Other costs | January 2021 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	13	0
Cumulative To Date	13
Other costs | December 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	112	$ 0
Cumulative To Date	$ 159