Segment Information, Operations By Geographic Area And Customer Concentration (Schedule Of Customer Concentration) (Details)	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
Revenue, Major Customer [Line Items]
Percentage of net revenue (in percentage)	100.00%	100.00%	100.00%	100.00%
Virgin Media Limited And Affiliates [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue (in percentage)	10.00%	9.00%	10.00%	10.00%
Ingram Micro Incorporation And Affiliates [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue (in percentage)	9.00%	10.00%	9.00%	10.00%
Best Buy Company Incorporation And Affiliates [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue (in percentage)	7.00%	10.00%	8.00%	12.00%
All Others [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue (in percentage)	74.00%	71.00%	73.00%	68.00%