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Supplemental Financial Information (Schedules Of Concentration Of Risk, By Risk Factor) (Details) (Customer Concentration Risk [Member])
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended
Jun. 29, 2013
Sales Revenue, Services, Net [Member]
Customer A [Member]
Jun. 30, 2012
Sales Revenue, Services, Net [Member]
Customer A [Member]
Jun. 29, 2013
Sales Revenue, Services, Net [Member]
Customer A [Member]
Jun. 30, 2012
Sales Revenue, Services, Net [Member]
Customer A [Member]
Jun. 29, 2013
Sales Revenue, Services, Net [Member]
Customer B [Member]
Jun. 30, 2012
Sales Revenue, Services, Net [Member]
Customer B [Member]
Jun. 29, 2013
Sales Revenue, Services, Net [Member]
Customer B [Member]
Jun. 29, 2013
Gross Receivables [Member]
Customer A [Member]
Dec. 29, 2012
Gross Receivables [Member]
Customer A [Member]
Jun. 29, 2013
Gross Receivables [Member]
Customer B [Member]
Dec. 29, 2012
Gross Receivables [Member]
Customer B [Member]
Concentration Risk [Line Items]                      
Concentration Risk, Percentage 48.00% 60.00% 35.00% 74.00% 17.00% 18.00% 18.00% 53.00% 41.00% 14.00% 24.00%