Restructuring And Other Charges (Restructuring And Other Charges Activity By Segment) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jul. 01, 2011	Jul. 01, 2011
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 8.9	$ 10.8
Restructuring Expense		1.0
Cash Payments	(2.6)	(5.5)
Ending Balance	6.3	6.3
2010 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	2.5	2.4
Restructuring Expense	0.1	0.6
Cash Payments	(1.5)	(1.9)
Ending Balance	1.1	1.1
2010 Restructuring Plan [Member] | Broadband Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	1.4	1.4
Restructuring Expense	0.1	0.4
Cash Payments	(0.9)	(1.2)
Ending Balance	0.6	0.6
2010 Restructuring Plan [Member] | Transport Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0.9	1.0
Cash Payments	(0.5)	(0.6)
Ending Balance	0.4	0.4
2010 Restructuring Plan [Member] | Services Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0.2
Restructuring Expense		0.2
Cash Payments	(0.1)	(0.1)
Ending Balance	0.1	0.1
Pre-2010 Restructuring Plans [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	6.4	8.4
Restructuring Expense	(0.1)	0.4
Cash Payments	(1.1)	(3.6)
Ending Balance	5.2	5.2
Pre-2010 Restructuring Plans [Member] | Broadband Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	5.1	6.4
Restructuring Expense		0.1
Cash Payments	(0.7)	(2.1)
Ending Balance	4.4	4.4
Pre-2010 Restructuring Plans [Member] | Transport Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0.5	1.5
Restructuring Expense	(0.1)	(0.2)
Cash Payments		(0.9)
Ending Balance	0.4	0.4
Pre-2010 Restructuring Plans [Member] | Services Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0.8	0.5
Restructuring Expense		0.5
Cash Payments	(0.4)	(0.6)
Ending Balance	$ 0.4	$ 0.4