Restructuring Activities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Restructuring Cost and Reserve [Line Items]
Severance and other restructuring costs	$ 3.8		$ 9.5
Broadcast Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other restructuring costs	3.2	4.4	7.6	4.4
Enterprise Connectivity [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other restructuring costs		3.2		3.2
Industrial Connectivity [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other restructuring costs		9.2		9.2
Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other restructuring costs		0.5		0.5
Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other restructuring costs			4.0
Cost of sales [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other restructuring costs		6.4		6.4
Total severance and other restructuring costs	1.9		5.0
Selling, general and administrative expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other restructuring costs		10.0		10.0
Total severance and other restructuring costs	1.6		3.2
Research and development [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other restructuring costs		0.9		0.9
Total severance and other restructuring costs	$ 0.3		$ 1.3