Revenues - Major Product Category (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
Cable & Connectivity
Disaggregation of Revenue [Line Items]
Revenues	413,394	434,388	1,241,075	1,284,032
Cable & Connectivity | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	263,857	271,928	765,909	785,970
Cable & Connectivity | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	149,537	162,460	475,166	498,062
Networking, Software & Security
Disaggregation of Revenue [Line Items]
Revenues	206,924	221,386	603,948	645,946
Networking, Software & Security | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	104,223	116,923	298,560	348,906
Networking, Software & Security | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 102,701	$ 104,463	$ 305,388	$ 297,040