Goodwill And Intangible Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended	12 Months Ended			12 Months Ended
	Dec. 30, 2011	Dec. 31, 2010	Dec. 31, 2010 WiChorus [Member]	Sep. 30, 2011 Broadband Segment [Member]	Dec. 30, 2011 Broadband Segment [Member]	Dec. 31, 2010 Broadband Segment [Member]	Dec. 31, 2010 Research And Development Team Addition [Member]	Dec. 30, 2011 Developed Technology [Member] years	Dec. 30, 2011 Customer Relationships/Backlog [Member] months years	Dec. 30, 2011 Trade Names/Trademarks [Member] months	Dec. 30, 2011 Leasehold Improvements [Member] years	Dec. 30, 2011 Non-Compete Agreements [Member] years	Dec. 30, 2011 IPR&D [Member]	Jan. 01, 2010 WiChorus Acquistion [Member]	Dec. 31, 2010 WiChorus Acquistion [Member] Developed Technology [Member] years	Jan. 01, 2010 WiChorus Acquistion [Member] Developed Technology [Member] years	Jan. 01, 2010 WiChorus Acquistion [Member] Customer Relationships/Backlog [Member] years	Jan. 01, 2010 WiChorus Acquistion [Member] Trade Names/Trademarks [Member] years	Jan. 01, 2010 WiChorus Acquistion [Member] Non-Compete Agreements [Member] years	Jan. 01, 2010 WiChorus Acquistion [Member] IPR&D [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Impairment charges on goodwill				$ 82.7	$ 82.7
Indefinite-lived Intangible Assets, Impairment Losses													20.0
Reduction in goodwill	(82.7)	(2.0)	(2.0)		(82.7)	(2.0)
Goodwill, Acquired During Period														82.7
Finite-lived intangible assets, useful life, minimum								2	6	4	4	1.5							1.5
Finite-lived intangible assets, useful life, maximum								7.5	9	12	10	3				7.5			3
Finite-lived intangible assets, useful life															5		8	1
Acquired Finite-lived intangible assets							0.4							83.6		66.0	4.3	0.2	13.1
Acquired Indefinite-lived Intangible Asset, Amount														$ 20.0						$ 20.0