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Revenues - Major Product Category (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
Broadband & 5G
Disaggregation of Revenue [Line Items]
Revenues	115,149	107,067	318,765	287,338
Broadband & 5G | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	115,149	107,067	318,765	287,338
Broadband & 5G | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Cyber-security
Disaggregation of Revenue [Line Items]
Revenues	27,384	29,760	78,829	96,054
Cyber-security | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Cyber-security | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	27,384	29,760	78,829	96,054
Industrial Automation
Disaggregation of Revenue [Line Items]
Revenues	219,358	256,102	640,663	785,892
Industrial Automation | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Industrial Automation | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	219,358	256,102	640,663	785,892
Smart Buildings
Disaggregation of Revenue [Line Items]
Revenues	113,948	140,169	325,919	412,306
Smart Buildings | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	113,948	140,169	325,919	412,306
Smart Buildings | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 0

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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