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Investments (Summary of Marketable Investments by Type) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 30, 2014 | Jun. 30, 2013
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | $ 951,882 | $ 834,249
Gross Unrealized Gains | 3,554 | 2,695
Gross Unrealized Losses | (863) | (3,098)
Estimated Fair Value | 954,573 | 833,846
Municipal Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 306,484 | 250,206
Gross Unrealized Gains | 1,598 | 817
Gross Unrealized Losses | (289) | (1,314)
Estimated Fair Value | 307,793 | 249,709
Corporate Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 227,500 | 192,147
Gross Unrealized Gains | 1,742 | 1,678
Gross Unrealized Losses | (574) | (1,765)
Estimated Fair Value | 228,668 | 192,060
U.S. Agency Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 27,095 | 39,288
Gross Unrealized Gains | 189 | 186
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 27,284 | 39,474
Non-U.S. Certificates of Deposit [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 383,758 | 345,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 383,758 | 345,000
Non-U.S. Government Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 7,045 | 7,608
Gross Unrealized Gains | 25 | 14
Gross Unrealized Losses | 0 | (19)
Estimated Fair Value | $ 7,070 | $ 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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