Revenue From Contracts With Customers (Disaggregated Revenue) (Details) - Revenue from contract with customer benchmark - Customer Concentration Risk	3 Months Ended		9 Months Ended
	Oct. 02, 2020	Sep. 27, 2019	Oct. 02, 2020	Sep. 27, 2019
Medical | Customer A
Disaggregation of Revenue [Line Items]
Concentration risk percentage	16.00%	20.00%	20.00%	22.00%
Medical | Customer B
Disaggregation of Revenue [Line Items]
Concentration risk percentage	17.00%	18.00%	16.00%	18.00%
Medical | Customer C
Disaggregation of Revenue [Line Items]
Concentration risk percentage	17.00%	13.00%	15.00%	12.00%
Medical | All other customers
Disaggregation of Revenue [Line Items]
Concentration risk percentage	50.00%	49.00%	49.00%	48.00%
Non-Medical | Customer D
Disaggregation of Revenue [Line Items]
Concentration risk percentage	25.00%	22.00%	22.00%	24.00%
Non-Medical | Customer E
Disaggregation of Revenue [Line Items]
Concentration risk percentage			11.00%
Non-Medical | Customer F
Disaggregation of Revenue [Line Items]
Concentration risk percentage	11.00%
Non-Medical | Customer G
Disaggregation of Revenue [Line Items]
Concentration risk percentage		12.00%
Non-Medical | All other customers
Disaggregation of Revenue [Line Items]
Concentration risk percentage	64.00%	66.00%	67.00%	76.00%