Revenues - Location of Customer (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 475,839	$ 533,098	$ 1,364,176	$ 1,581,590
Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	229,097	247,236	644,684	699,644
Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	246,742	285,862	719,492	881,946
Americas
Disaggregation of Revenue [Line Items]
Revenues	319,155	359,052	910,468	1,053,396
Americas | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	170,734	183,183	481,007	508,616
Americas | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	148,421	175,869	429,461	544,780
EMEA
Disaggregation of Revenue [Line Items]
Revenues	89,365	104,451	274,603	325,928
EMEA | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	30,185	36,065	92,197	106,823
EMEA | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	59,180	68,386	182,406	219,105
APAC
Disaggregation of Revenue [Line Items]
Revenues	67,319	69,595	179,105	202,266
APAC | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	28,178	27,988	71,480	84,205
APAC | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 39,141	$ 41,607	$ 107,625	$ 118,061