Restructuring And Other Charges (Restructuring And Other Charges Activity By Segment) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011		Sep. 30, 2011
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 6.3		$ 10.8
Restructuring Expense	19.5		20.5
Cash Payments	(4.3)		(9.8)
Other Activities	(1.3)	[1]	(1.3)	[1]
Ending Balance	20.2		20.2
2011 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring Expense	18.7		18.7
Cash Payments	(2.6)		(2.6)
Other Activities	(1.1)	[1]	(1.1)	[1]
Ending Balance	15.0		15.0
2011 Restructuring Plan [Member] | Broadband Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring Expense	10.1		10.1
Cash Payments	(1.1)		(1.1)
Other Activities	(0.8)	[1]	(0.8)	[1]
Ending Balance	8.2		8.2
2011 Restructuring Plan [Member] | Transport Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring Expense	4.7		4.7
Cash Payments	(0.5)		(0.5)
Other Activities	(0.3)	[1]	(0.3)	[1]
Ending Balance	3.9		3.9
2011 Restructuring Plan [Member] | Services Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring Expense	3.9		3.9
Cash Payments	(1.0)		(1.0)
Other Activities		[1]
Ending Balance	2.9		2.9
2010 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	1.1		2.4
Restructuring Expense	0.2		0.8
Cash Payments	(0.8)		(2.7)
Other Activities		[1]		[1]
Ending Balance	0.5		0.5
2010 Restructuring Plan [Member] | Broadband Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0.6		1.4
Restructuring Expense	0.1		0.5
Cash Payments	(0.4)		(1.6)
Other Activities		[1]		[1]
Ending Balance	0.3		0.3
2010 Restructuring Plan [Member] | Transport Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0.4		1.0
Restructuring Expense	0.1		0.1
Cash Payments	(0.4)		(1.0)
Other Activities		[1]		[1]
Ending Balance	0.1		0.1
2010 Restructuring Plan [Member] | Services Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0.1
Restructuring Expense			0.2
Cash Payments			(0.1)
Other Activities		[1]		[1]
Ending Balance	0.1		0.1
Pre-2010 Restructuring Plans [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	5.2		8.4
Restructuring Expense	0.6		1.0
Cash Payments	(0.9)		(4.5)
Other Activities	(0.2)	[1]	(0.2)	[1]
Ending Balance	4.7		4.7
Pre-2010 Restructuring Plans [Member] | Broadband Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	4.4		6.4
Restructuring Expense	0.5		0.6
Cash Payments	(0.6)		(2.7)
Other Activities	(0.1)	[1]	(0.1)	[1]
Ending Balance	4.2		4.2
Pre-2010 Restructuring Plans [Member] | Transport Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0.4		1.5
Restructuring Expense	0.1		(0.1)
Cash Payments	(0.2)		(1.1)
Other Activities		[1]
Ending Balance	0.3		0.3
Pre-2010 Restructuring Plans [Member] | Services Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0.4		0.5
Restructuring Expense			0.5
Cash Payments	(0.1)		(0.7)
Other Activities	(0.1)	[1]	(0.1)	[1]
Ending Balance	$ 0.2		$ 0.2

[1] Other activities include the effects of currency translation, write-downs of property, plant and equipment to be disposed, as well as other changes in the reserve that do not flow through restructuring expense.