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Summary of Investments (Detail) (USD $) In Thousands, unless otherwise specified | Mar. 30, 2014 | Jun. 30, 2013
--- | --- | ---
Financial Instruments [Line Items] |  |
Fair Value | $ 1,462,171 | $ 1,334,746
Cash |  |
Financial Instruments [Line Items] |  |
Cost | 254,982 | 438,813
Fair Value | 254,982 | 438,813
Fixed Income Money Market Funds |  |
Financial Instruments [Line Items] |  |
Cost | 1,042,596 | 725,311
Fair Value | 1,042,596 | 725,311
Municipal Notes And Bonds |  |
Financial Instruments [Line Items] |  |
Cost | 248,050 | 268,390
Unrealized Gain | 927 | 805
Unrealized (Loss) | (28) | (449)
Fair Value | 248,949 | 268,746
US Treasury and Agencies |  |
Financial Instruments [Line Items] |  |
Cost | 183,072 | 155,648
Unrealized Gain | 61 | 18
Unrealized (Loss) | (166) | (373)
Fair Value | 182,967 | 155,293
Government-Sponsored Enterprises |  |
Financial Instruments [Line Items] |  |
Cost | 41,068 | 54,835
Unrealized Gain | 51 | 65
Unrealized (Loss) | (30) | (95)
Fair Value | 41,089 | 54,805
Foreign Government Bonds |  |
Financial Instruments [Line Items] |  |
Cost | 34,979 | 24,950
Unrealized Gain | 95 | 47
Unrealized (Loss) | (86) | (25)
Fair Value | 34,988 | 24,972
Corporate Notes And Bonds |  |
Financial Instruments [Line Items] |  |
Cost | 960,356 | 861,109
Unrealized Gain | 1,771 | 1,328
Unrealized (Loss) | (749) | (1,945)
Fair Value | 961,378 | 860,492
Mortgage Backed Securities - Residential |  |
Financial Instruments [Line Items] |  |
Cost | 26,802 | 27,618
Unrealized Gain | 30 | 29
Unrealized (Loss) | (252) | (282)
Fair Value | 26,580 | 27,365
Mortgage Backed Securities - Commercial |  |
Financial Instruments [Line Items] |  |
Cost | 105,264 | 108,204
Unrealized Gain | 141 | 426
Unrealized (Loss) | (548) | (672)
Fair Value | 104,857 | 107,958
Total Cash And Short Term Investments |  |
Financial Instruments [Line Items] |  |
Cost | 2,897,169 | 2,664,878
Unrealized Gain | 3,076 | 2,718
Unrealized (Loss) | (1,859) | (3,841)
Fair Value | 2,898,386 | 2,663,755
Publicly Traded Equity Securities |  |
Financial Instruments [Line Items] |  |
Cost |  | 5,610
Unrealized Gain |  | 1,486
Fair Value |  | 7,096
Private Equity Securities |  |
Financial Instruments [Line Items] |  |
Cost |  | 5,000
Fair Value |  | 5,000
Mutual Funds |  |
Financial Instruments [Line Items] |  |
Cost | 25,656 | 16,611
Unrealized Gain | 2,903 | 1,619
Unrealized (Loss) |  | (14)
Fair Value | 28,559 | 18,216
Total Financial Instruments |  |
Financial Instruments [Line Items] |  |
Cost | 2,922,825 | 2,692,099
Unrealized Gain | 5,979 | 5,823
Unrealized (Loss) | (1,859) | (3,855)
Fair Value | 2,926,945 | 2,694,067
Cash and Cash Equivalents |  |
Financial Instruments [Line Items] |  |
Cost | 1,292,301 | 1,162,473
Fair Value | 1,292,301 | 1,162,473
Short-term Investments |  |
Financial Instruments [Line Items] |  |
Cost | 1,460,954 | 1,335,868
Unrealized Gain | 3,076 | 2,718
Unrealized (Loss) | (1,859) | (3,841)
Fair Value | 1,462,171 | 1,334,745
Restricted Cash And Investments |  |
Financial Instruments [Line Items] |  |
Cost | 143,914 | 166,536
Fair Value | 143,914 | 166,536
Other Assets |  |
Financial Instruments [Line Items] |  |
Cost | 25,656 | 27,222
Unrealized Gain | 2,903 | 3,105
Unrealized (Loss) |  | (14)
Fair Value | 28,559 | 30,313
Total |  |
Financial Instruments [Line Items] |  |
Cost | 2,922,825 | 2,692,099
Unrealized Gain | 5,979 | 5,823
Unrealized (Loss) | (1,859) | (3,855)
Fair Value | $ 2,926,945 | $ 2,694,067

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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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