Revenues - Location of Customer (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 620,318	$ 655,774	$ 1,845,023	$ 1,929,978
Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	368,080	388,851	1,064,469	1,134,876
Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	252,238	266,923	780,554	795,102
Americas
Disaggregation of Revenue [Line Items]
Revenues	398,322	410,654	1,161,064	1,197,461
Americas | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	250,382	254,320	706,291	735,794
Americas | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	147,940	156,334	454,773	461,667
EMEA
Disaggregation of Revenue [Line Items]
Revenues	133,650	143,747	418,966	446,245
EMEA | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	70,949	72,467	211,226	228,394
EMEA | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	62,701	71,280	207,740	217,851
APAC
Disaggregation of Revenue [Line Items]
Revenues	88,346	101,373	264,993	286,272
APAC | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	46,749	62,064	146,952	170,688
APAC | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 41,597	$ 39,309	$ 118,041	$ 115,584