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Supplemental Financial Information (Schedules Of Concentration Of Risk, By Risk Factor) (Details) (Customer Concentration Risk [Member]) | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended
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Mar. 30, 2013 Sales Revenue, Services, Net [Member] Customer A [Member] | Mar. 31, 2012 Sales Revenue, Services, Net [Member] Customer A [Member] | Mar. 30, 2013 Sales Revenue, Services, Net [Member] Customer B [Member] | Mar. 30, 2013 Sales Revenue, Services, Net [Member] Customer C [Member] | Mar. 30, 2013 Gross Receivables [Member] Customer A [Member] | Dec. 29, 2012 Gross Receivables [Member] Customer A [Member] | Mar. 30, 2013 Gross Receivables [Member] Customer B [Member] | Dec. 29, 2012 Gross Receivables [Member] Customer B [Member] | Mar. 30, 2013 Gross Receivables [Member] Customer C [Member] | Mar. 30, 2013 Gross Receivables [Member] Customer D [Member]
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage | 24.00% | 85.00% | 18.00% | 10.00% | 19.00% | 41.00% | 16.00% | 24.00% | 16.00% | 10.00%

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611 + Details
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