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Investments (Summary of Marketable Investments by Type) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 29, 2013 | Jun. 30, 2013
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | $ 912,690 | $ 834,249
Gross Unrealized Gains | 3,483 | 2,695
Gross Unrealized Losses | (1,110) | (3,098)
Estimated Fair Value | 915,063 | 833,846
Municipal Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 278,331 | 250,206
Gross Unrealized Gains | 1,604 | 817
Gross Unrealized Losses | (151) | (1,314)
Estimated Fair Value | 279,784 | 249,709
Corporate Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 208,636 | 192,147
Gross Unrealized Gains | 1,660 | 1,678
Gross Unrealized Losses | (957) | (1,765)
Estimated Fair Value | 209,339 | 192,060
U.S. Agency Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 31,157 | 39,288
Gross Unrealized Gains | 199 | 186
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 31,356 | 39,474
Non-U.S. Certificates of Deposit [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 386,000 | 345,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 386,000 | 345,000
Non-U.S. Government Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 8,566 | 7,608
Gross Unrealized Gains | 20 | 14
Gross Unrealized Losses | (2) | (19)
Estimated Fair Value | $ 8,584 | $ 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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