Segment Information (Segment Profit And Reconciliation To Operating (Loss) Earnings By Segment) (Details) (USD $) In Millions	3 Months Ended	9 Months Ended
Sep. 30, 2011	Oct. 01, 2010	Sep. 30, 2011	Oct. 01, 2010
Segment Reporting Information [Line Items]
Total segment profit	$ 50.3	$ 142.9	$ 141.8	$ 426.7
Sales and marketing expenses	(41.4)	(43.6)	(126.9)	(132.5)
General and administrative expenses	(18.6)	(24.0)	(63.3)	(73.7)
Equity-based compensation	(3.1)	(3.5)	(11.1)	(9.7)
Intangible asset amortization	(5.0)	(6.1)	(15.3)	(20.9)
Restructuring and other charges	(19.5)		(20.5)	(9.5)
Goodwill and IPR&D impairment	(102.7)		(102.7)
Operating (Loss) Earnings	(140.0)	65.7	(198.0)	180.4
Broadband Segment [Member]
Segment Reporting Information [Line Items]
Total segment profit	22.9	48.8	39.6	195.7
Transport Segment [Member]
Segment Reporting Information [Line Items]
Total segment profit	4.6	71.6	47.8	168.3
Services Segment [Member]
Segment Reporting Information [Line Items]
Total segment profit	$ 22.8	$ 22.5	$ 54.4	$ 62.7

Equity-based compensation that is not included in segment profit for segment reporting. The equity-based compensation is subtracted from segment profit to reconcile segment profit to operating earnings.

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Goodwill and in-process research and development impairment.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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