Significant Customers And Concentrations Of Credit Risk (Details) (USD $)	3 Months Ended	12 Months Ended
Jul. 02, 2011	Jul. 03, 2010	Apr. 02, 2011	Mar. 28, 2009
Significant Customers And Concentrations Of Credit Risk
Percentage of total accounts receivable accounted from Avnet	94.00%		79.00%
Percentage of net revenues through resale of product from Avnet	49.00%	52.00%
Percentage of net revenues from end customer	10.00%		10.00%
Number of end customers accounted for net revenues	0		0
Percentage of higher grade securities investment in debt securities	92.00%
Total investment portfolio	$ 2,750,000,000
Percentage of student loan auction rate securities in total investment portfolio	1.00%
Investments downgraded to an A rate securities				3,800,000
Redemption of student loan auction rate securities	$ 4,400,000	$ 450,000
Percentage of mortgage-backed securities in total investment portfolio	25.00%

Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 12
-Paragraph 3, 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 14
-Paragraph 2, 3
-Article 12

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 5
-Subparagraph (SX 210.12-13.Column C.6)
-URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611282-123010

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 13
-Paragraph Column C
-Article 12

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12.Column C.3,4)
-URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611133-123010

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 13
-Paragraph 6
-Article 12

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14.Column E.2,3)
-URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611322-123010

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column C
-Article 12

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 14
-Paragraph Column E
-Article 12

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12C
-Paragraph 7
-Article 12

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-12C.Column C.7)
-URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611225-123010

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12C
-Paragraph Column C
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Investments downgraded to an A rate Securities.

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