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Investments (Summary of Marketable Investments by Type) (Details) (USD $) In Thousands, unless otherwise specified | Jun. 29, 2014 | Jun. 30, 2013
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | $ 870,993 | $ 834,249
Gross Unrealized Gains | 4,775 | 2,695
Gross Unrealized Losses | (126) | (3,098)
Estimated Fair Value | 875,642 | 833,846
Municipal Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 291,869 | 250,206
Gross Unrealized Gains | 2,323 | 817
Gross Unrealized Losses | (12) | (1,314)
Estimated Fair Value | 294,180 | 249,709
Corporate Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 200,177 | 192,147
Gross Unrealized Gains | 2,283 | 1,678
Gross Unrealized Losses | (114) | (1,765)
Estimated Fair Value | 202,346 | 192,060
U.S. Agency Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 18,994 | 39,288
Gross Unrealized Gains | 141 | 186
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 19,135 | 39,474
Non-U.S. certificates of deposit [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 352,928 | 345,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 352,928 | 345,000
Non-U.S. Government Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 7,025 | 7,608
Gross Unrealized Gains | 28 | 14
Gross Unrealized Losses | 0 | (19)
Estimated Fair Value | $ 7,053 | $ 7,603

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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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