Summary of Investments (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 23, 2012	Jun. 24, 2012
Financial Instruments [Line Items]
Fair Value	$ 1,312,767	$ 1,297,931
Cash
Financial Instruments [Line Items]
Cost	236,130	240,841
Fair Value	236,130	240,841
Fixed Income Money Market Funds
Financial Instruments [Line Items]
Cost	1,175,847	1,318,812
Fair Value	1,175,847	1,318,812
Municipal Notes And Bonds
Financial Instruments [Line Items]
Cost	324,072	321,001
Unrealized Gain	1,582	1,574
Unrealized (Loss)	(6)	(8)
Fair Value	325,648	322,567
US Treasury and Agencies
Financial Instruments [Line Items]
Cost	179,077	137,516
Unrealized Gain	154	43
Unrealized (Loss)	(18)	(113)
Fair Value	179,213	137,446
Government-Sponsored Enterprises
Financial Instruments [Line Items]
Cost	117,872	123,269
Unrealized Gain	235	67
Unrealized (Loss)	(2)	(68)
Fair Value	118,105	123,268
Foreign Governments Bonds
Financial Instruments [Line Items]
Cost	7,796	6,315
Unrealized Gain	86	43
Fair Value	7,882	6,358
Corporate Notes And Bonds
Financial Instruments [Line Items]
Cost	747,817	767,847
Unrealized Gain	3,172	1,443
Unrealized (Loss)	(70)	(389)
Fair Value	750,919	768,901
Mortgage Backed Securities- Residential
Financial Instruments [Line Items]
Cost	15,104	25,857
Unrealized Gain	120	121
Unrealized (Loss)	(3)	(6)
Fair Value	15,221	25,972
Mortgage Backed Securities - Commercial
Financial Instruments [Line Items]
Cost	80,847	84,682
Unrealized Gain	911	555
Unrealized (Loss)	(295)	(384)
Fair Value	81,463	84,853
Total Cash And Short Term Investments
Financial Instruments [Line Items]
Cost	2,884,562	3,026,140
Unrealized Gain	6,260	3,846
Unrealized (Loss)	(394)	(968)
Fair Value	2,890,428	3,029,018
Publicly Traded Equity Securities
Financial Instruments [Line Items]
Cost	9,320	9,320
Unrealized (Loss)	(3,580)	(3,407)
Fair Value	5,740	5,913
Private Equity Securities
Financial Instruments [Line Items]
Cost	5,000	5,000
Fair Value	5,000	5,000
Mutual Funds
Financial Instruments [Line Items]
Cost	18,559	17,459
Unrealized Gain	1,028	366
Unrealized (Loss)	(34)	(71)
Fair Value	19,553	17,754
Total Financial Instruments
Financial Instruments [Line Items]
Cost	2,917,441	3,057,919
Unrealized Gain	7,288	4,212
Unrealized (Loss)	(4,008)	(4,446)
Fair Value	2,920,721	3,057,685
Cash and Cash Equivalents
Financial Instruments [Line Items]
Cost	1,411,467	1,564,752
Unrealized (Loss)	(1)
Fair Value	1,411,466	1,564,752
Short-term Investments
Financial Instruments [Line Items]
Cost	1,306,900	1,295,053
Unrealized Gain	6,260	3,846
Unrealized (Loss)	(393)	(968)
Fair Value	1,312,767	1,297,931
Restricted Cash And Investments
Financial Instruments [Line Items]
Cost	166,196	166,335
Fair Value	166,196	166,335
Other Assets
Financial Instruments [Line Items]
Cost	32,878	31,779
Unrealized Gain	1,028	366
Unrealized (Loss)	(3,614)	(3,478)
Fair Value	30,292	28,667
Total
Financial Instruments [Line Items]
Cost	2,917,441	3,057,919
Unrealized Gain	7,288	4,212
Unrealized (Loss)	(4,008)	(4,446)
Fair Value	$ 2,920,721	$ 3,057,685