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Summary of Investments (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 29, 2014 | Jun. 30, 2013
--- | --- | ---
Financial Instruments [Line Items] |  |
Estimated Fair Value | $ 2,927,105 | $ 2,224,942
Municipal Notes And Bonds |  |
Financial Instruments [Line Items] |  |
Cost | 334,329 | 268,390
Unrealized Gain | 1,108 | 805
Unrealized (Loss) | (4) | (449)
Estimated Fair Value | 335,433 | 268,746
Corporate Notes And Bonds |  |
Financial Instruments [Line Items] |  |
Cost | 1,007,089 | 861,109
Unrealized Gain | 2,034 | 1,328
Unrealized (Loss) | (335) | (1,945)
Estimated Fair Value | 1,008,788 | 860,492
Short-term Investments |  |
Financial Instruments [Line Items] |  |
Cost | 1,610,790 | 1,335,868
Unrealized Gain | 3,577 | 2,718
Unrealized (Loss) | (1,400) | (3,841)
Estimated Fair Value | 1,612,967 | 1,334,745
Cash |  |
Financial Instruments [Line Items] |  |
Cost | 285,031 | 438,813
Estimated Fair Value | 285,031 | 438,813
Fixed Income Money Market Funds |  |
Financial Instruments [Line Items] |  |
Cost | 1,168,261 | 725,311
Estimated Fair Value | 1,168,261 | 725,311
US Treasury and Agencies |  |
Financial Instruments [Line Items] |  |
Cost | 212,436 | 155,648
Unrealized Gain | 178 | 18
Unrealized (Loss) | (27) | (373)
Estimated Fair Value | 212,587 | 155,293
Government-Sponsored Enterprises |  |
Financial Instruments [Line Items] |  |
Cost | 27,666 | 54,835
Unrealized Gain | 41 | 65
Unrealized (Loss) | (15) | (95)
Estimated Fair Value | 27,692 | 54,805
Foreign Government Bonds |  |
Financial Instruments [Line Items] |  |
Cost | 35,438 | 24,950
Unrealized Gain | 57 | 47
Unrealized (Loss) | (28) | (25)
Estimated Fair Value | 35,467 | 24,972
Mortgage Backed Securities - Residential |  |
Financial Instruments [Line Items] |  |
Cost | 27,067 | 27,618
Unrealized Gain | 59 | 29
Unrealized (Loss) | (182) | (282)
Estimated Fair Value | 26,944 | 27,365
Mortgage Backed Securities - Commercial |  |
Financial Instruments [Line Items] |  |
Cost | 112,642 | 108,204
Unrealized Gain | 100 | 426
Unrealized (Loss) | (809) | (672)
Estimated Fair Value | 111,933 | 107,958
Cash And Short Term Investments [Member] |  |
Financial Instruments [Line Items] |  |
Cost | 3,209,959 | 2,664,878
Unrealized Gain | 3,577 | 2,718
Unrealized (Loss) | (1,400) | (3,841)
Estimated Fair Value | 3,212,136 | 2,663,755
Publicly Traded Equity Securities |  |
Financial Instruments [Line Items] |  |
Cost |  | 5,610
Unrealized Gain |  | 1,486
Estimated Fair Value |  | 7,096
Private Equity Securities |  |
Financial Instruments [Line Items] |  |
Cost |  | 5,000
Estimated Fair Value |  | 5,000
Mutual Funds |  |
Financial Instruments [Line Items] |  |
Cost | 18,784 | 16,611
Unrealized Gain | 2,974 | 1,619
Unrealized (Loss) |  | (14)
Estimated Fair Value | 21,758 | 18,216
Financial Instruments |  |
Financial Instruments [Line Items] |  |
Cost | 3,228,743 | 2,692,099
Unrealized Gain | 6,551 | 5,823
Unrealized (Loss) | (1,400) | (3,855)
Estimated Fair Value | 3,233,894 | 2,694,067
Cash and Cash Equivalents |  |
Financial Instruments [Line Items] |  |
Cost | 1,452,677 | 1,162,473
Estimated Fair Value | 1,452,677 | 1,162,473
Restricted Cash And Investments |  |
Financial Instruments [Line Items] |  |
Cost | 146,492 | 166,536
Estimated Fair Value | 146,492 | 166,536
Other Assets |  |
Financial Instruments [Line Items] |  |
Cost | 18,784 | 27,222
Unrealized Gain | 2,974 | 3,105
Unrealized (Loss) |  | (14)
Estimated Fair Value | $ 21,758 | $ 30,313

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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Available-for-Sale Securities -URI http://asc.fasb.org/extlink&oid=6505594 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Subparagraph a, f, g -Article 7 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 35 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e24584-111560 + Details
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